Supplementary Data File #1 WHAT IS NAVDAT

NAVDAT- the North American Volcanic and Plutonic Database – is an online data repository that catalogues age, chemical, and isotopic data for igneous rocks from North America. NAVDAT is also a part of a growing advanced data management portal for solid Earth Geochemistry, EARTHCHEM, and in the near future will be phased out as a component of EARTHCHEM. NAVDAT provides permanent and publicly available data and allows a continent-wide look at space-time patterns of magmatism. Numerous resources including educational, animations, glossaries, are available through the NAVDAT portal. NAVDAT home page: http://navdat.kgs.ku.edu/ EARTHCHEM home page: http://www.earthchem.org/ SAMPLE SELECTION

Below, we provide a brief guide to accessing plutonic data used in Figures 1 and

2. We used data points that are: (1) geographically within the western United States Cordillera and its equivalents in Mexico (Baja California, Sonora), and Canada (Yukon and British Columbia), (2) have crystallization ages between 225 and 45 Ma, a time span that captures the life of the four major batholithic segments of North America, (3) contain previously published Sr, Nd, and/or O isotopic data. We used only whole rock Sr and Nd isotopic data. In the case of oxygen isotopes, we used quartz and zircon values and determined a whole-rock δ18O in equilibrium with these phases at 800 0C (Taylor, 1988), or whole-rock values if reported. Further line-by-line inspection of data points was performed and led to rejection of about 264 points based on poor quality age or isotopic data, rocks were not calc-alkaline and/or plutonic. The final compilation contained 3526 data points. HOW TO DOWNLOAD PLUTONIC DATA FROM WESTERN NORTH AMERICA Step 1: Go to the NAVDAT portal: http://navdat.kgs.ku.edu/ Step 2: Select search database: http://navdat.kgs.ku.edu/NavdatSearch/index.cfm Step 3: Set age: <225, and >45 Ma Step 4: Set geographic location by state. Select the following US states: Arizona, California, Nevada, Oregon, Washington, Utah. Select both British Columbia and Yukon for Canada. Select Baja California and Sonora for Mexico. At this point, the server is ready to output data. Step 5: Select ISOTOPES, and download data in one of the following formats:

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- Html table; - Tab-delimited text file; - Excel file.

Once downloaded, you can check metadata for individual data points by clicking on the unique sample ID. REFERENCES Data used in this compilation originate in 333 previously published scholarly contributions that are catalogued with a GEOREF accession number. The comprehensive list, including abstracts where available, is provided as a separate Supplementary text file that can be opened as a word document or imported into reference software such as ENDNOTE. Every reference has the following format given below: (Reference 319) GEOREF: 1992-052257 CODEN: BUGMAF ABSTRACT: Jurassic and Early Cretaceous plutons in the Klamath Mountains province of California and Oregon were intruded both before and after thrusting during the Nevadan orogeny (ca. 155-148 Ma). Plutons intruded before Nevadan thrusting range from calc-alkalic to calcic and display a range of compositions that changes consistently with time. Among this group, Rb, K (sub 2) O, and initial (super 87) Sr/ (super 86) Sr (Sr (sub i) ; range 0.7034 to 0.7047) decrease and epsilon Nd (range 2.0 to 4.8) increases in younger plutons. Within individual plutons, Sr (sub i) varies considerably, whereas epsilon Nd is nearly constant. The Sr and Nd isotopic data typically plot to the right of the mantle array. delta (super 18) O values in these plutons are greater than +8 per mil. Tonalitic and trondhjemitic plutons intruded after Nevadan thrusting are typically calcic, contain low Rb and K (sub 2) O contents, and have delta (super 18) O less than +8 per mil. These plutons have a narrow range of Sr (sub i) (0.7033-0.7036) and epsilon Nd (4.7 to 7.4); values that plot in the mantle array. The isotopic compositions of the pre-Nevadan plutons requires assimilation of metasedimentary rocks or mixing with crustal melts at deep-crustal levels. The deep-crustal component is not exposed in the province and was presumably truncated during Nevadan thrusting. Post-Nevadan plutons show little evidence of assimilation of metasedimentary crust but display trace-element evidence (low K (sub 2) O, Rb, and rare-earth element concentrations) consistent with an origin by partial melting of young ophiolitic rocks underthrust during the Nevadan orogeny. AUTHOR AFFILIATION: Tex. Tech Univ., Dep. Geosci., Lubbock, TX, United States ACCESSION NUMBER: 1992-052257 AUTHORS: Barnes-Calvin-G; Petersen-Scott-W; Kistler-R-W; Prestvik-Tore; Sundvoll-B BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology; 16-Structural-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkaline-earth-metals; assimilation-; California-; Cretaceous-; Curry-County-Oregon; Del-Norte-County-California; faults-; geochemistry-; Humboldt-County-California; igneous-rocks; intrusions-; isotopes-; Jackson-County-Oregon; Josephine-County-Oregon; Jurassic-; Klamath-Mountains; Lower-Cretaceous; magmas-; major-elements; Mesozoic-; metals-; metamorphic-rocks; Nd-144-Nd-143; neodymium-; Nevadan-Orogeny; Northern-California; O-18-O-16; Oregon-; oxygen-; plutonic-rocks; plutons-; rare-earths; Siskiyou-County-California; southwestern-Oregon; Sr-87-Sr-86; stable-isotopes; strontium-; tectonics-; thrust-faults; trace-elements; Trinity-County-California; United-States DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 64; illus. incl. sects., 4 tables, geol. sketch map. ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 1992. PUBLICATION YEAR: 1992 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Geological Society of America Bulletin. 104; 1, Pages 117-126. 1992. TITLE: Tectonic implications of isotopic variation among Jurassic and Early Cretaceous plutons, Klamath Mountains.

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GEOREF: 1985-038082 AUTHOR AFFILIATION: Univ. Calif., Dep. Earth and Space Sci., Los Angeles, CA, United States ACCESSION NUMBER: 1985-038082 AUTHORS: Farmer-G-Lang; DePaolo-Donald-J BOOK AUTHORS: Anonymous BOOK TITLE: In:Special section; S. Thomas Crough memorial. BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 02C-Geochemistry-of-rocks,-soils,-and-sediments COUNTRY OF PUBLICATION: United-States DESCRIPTORS: alkaline-earth-metals; Arizona-; Basin-and-Range-Province; Cenozoic-; Colorado-Plateau; contiental-crust; copper-ores; cratons-; crust-; genesis-; geochemistry-; granites-; Great-Basin; igneous-rocks; isotopes-; magmas-; mantle-; Mesozoic-; metal-ores; metals-; molybdenum-ores; Nd-144-Nd-143; neodymium-; North-America; North-American-Cordillera; Northern-Rocky-Mountains; plutonic-rocks; Precambrian-; rare-earths; Rocky-Mountains; Sr-87-Sr-86; stable-isotopes; strontium-; tectonophysics-; Tertiary-; United-States; Western-U.S. DOCUMENT TYPE: Serial ILLUSTRATION: Refs130; illus. incl. 16 analys., 3 tables, sketch maps. ISSN: 0196-6936 LANGUAGE: English PUBLISHER: American Geophysical Union. Washington, DC, United States. 1984. PUBLICATION YEAR: 1984 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: JGR. Journal of Geophysical Research. B. 89; 12, Pages 10,141-10,160. 1984. . TITLE: Origin of Mesozoic and Tertiary granite in the Western United States and implications for pre-Mesozoic crustal structure; 2, Nd and Sr isotopic studies of unmineralized and Cu- and Mo-mineralized granite in the Precambrian craton. UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 2) GEOREF: 1985-038372 LATITUDE LONGITUDE: LAT|N380700; N381500; LONG: W1061500; W1062230. AUTHOR AFFILIATION: Union Oil Res. Cent., Brea, CA, United States ACCESSION NUMBER: 1985-038372 AUTHORS: Varga-Robert-J; Smith-Brian-M BOOK AUTHORS: Anonymous BOOK TITLE: In: Calderas and associate igneous rocks. BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 02D-Isotope-geochemistry CONFERENCE INFORMATION: Symposium on Calderas and related volcanic rocks; the Krakatau centennial; a part of the American Geophysical Union, 1983 fall meeting. San Francisco, CA, United States. Dec. 5-9, 1983. COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkaline-earth-metals; Bonanza-Caldera; Bonanza-Tuff; breccia-; calderas-; Cenozoic-; clastic-rocks; Colorado-; dacites-; dates-; geochemistry-; geochronology-; igneous-rocks; isotopes-; K-Ar; lava-; lower-Oligocene; major-elements; metals-; O-18-O-16; Oligocene-; oxygen-; Paleogene-; petrology-; pyroclastics-; Rawley-Andesite; rhyolites-; Saguache-County-

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Colorado; San-Juan-volcanic-field; sedimentary-rocks; Sr-87-Sr-86; stable-isotopes; strontium-; subsidence-; Tertiary-; trace-elements; tuff-; United-States; volcanic-breccia; volcanic-features; volcanic-rocks; volcanism-; volcanology- DOCUMENT TYPE: Serial; Conference-Document ILLUSTRATION: Refs 57; illus. incl. 3 tables, geol. sketch map. ISSN: 0196-6936 LANGUAGE: English PUBLISHER: American Geophysical Union. Washington, DC, United States. 1984. PUBLICATION YEAR: 1984 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: JGR. Journal of Geophysical Research. B. 89; 10, Pages 8679-8694. 1984. . TITLE: Evolution of the early Oligocene Bonanza Caldera, Northeast San Juan volcanic field, Colorado. UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 3) GEOREF: 1985-040539 CODEN: BUGMAF COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks,soils, and sediments COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 22; illus. incl. 1 table, sketch map LATITUDE LONGITUDE: Latitude:N444500,N450000 Longitude:W1093000,W1100000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Los Alamos Natl. Lab., United States USA ACCESSION NUMBER: 1985-040539 AUTHORS: Kudo, A M; Broxton, David E COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks,soils, and sediments COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Absaroka Range; alkali metals; basalts; chain silicates; complexes;Crandall Complex; differentiation; dikes; diorites; feldspar group;fractional crystallization; framework silicates; gabbros; genesis;geochemistry; granites; igneous rocks; intrusions; intrusive rocks;magmas; major elements; metals; mineral composition; North America;Park County Wyoming; petrology; plagioclase; plutonic rocks;pollution; potassium; pyroxene group; quartz monzonite; ring dikes;Rocky Mountains; shoshonite; silicates; trace elements; U. S. RockyMountains; United States; volcanic rocks; Wyoming ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1985 SOURCE: Geological Society of America Bulletin, vol.96, no.4, pp.522-528, Apr1985 TITLE: High-potassium intrusive rocks of the Crandall ring-dike complex,Absaroka Mountains, Wyoming UPDATE CODE: 1985 --------------------------------------------------------------------------------

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-------------------------- (Reference 4) GEOREF: 1985-046751 CODEN: CJESAP LATITUDE LONGITUDE: LAT| N590000; N591500; LONG: W1351500; W1354500. SUMMARY LANGUAGE: French AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, CA, United States ACCESSION NUMBER: 1985-046751 AUTHORS: Davis-Alice; Plafker-George BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 02C-Geochemistry-of-rocks,-soils,-and-sediments COUNTRY OF PUBLICATION: Canada DESCRIPTORS: Alaska-; Chilkat-Metabasalt; Chilkat-Peninsula; geochemistry-; low-grade-metamorphism; major-elements; Mesozoic-; metabasalt-; metaigneous-rocks; metals-; metamorphic-rocks; metamorphism-; Nikolai-Greenstone; rare-earths; southeastern-Alaska; Taku-Terrane; terranes-; tholeiitic-composition; trace-elements; Triassic-; United-States; Upper-Triassic; Wrangellia- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 35; illus. incl. 7 anal., 5 tables, geol. sketch map. ISSN: 0008-4077 LANGUAGE: English PUBLISHER: National Research Council of Canada. Ottawa, ON, Canada. 1985. PUBLICATION YEAR: 1985 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Canadian Journal of Earth Sciences = Journal Canadien des Sciences de la Terre. 22; 2, Pages 183-194. 1985. TITLE: Comparative geochemistry and petrology of Triassic basaltic rocks from the Taku Terrane on the Chilkat Peninsula and Wrangellia. UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 5) GEOREF: 1985-062504 COLLECTION AUTHORS: 13, Areal geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Scale: 1|24,000. Type: geologic maps FEATURES: References: 93 MONOGRAPH TITLE: Geology of the Cape Horn Lakes Quadrangle, south-central Idaho ORGANIZATION: University of Washington, Seattle, WA, United States USA PAGES DATE: 84 pp. PUBLICATION TYPE: Thesis or dissertation; Map; Master's; Monographic ACCESSION NUMBER: 1985-062504 AUTHORS: Lewis, Reed Stone COLLECTION AUTHORS: 13, Areal geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: age; areal geology; Cape Horn Lakes Quadrangle; Cenozoic; composition;Cretaceous; diorites; emplacement; Eocene; faults; grabens; granites;Idaho; Idaho Batholith; igneous rocks; intrusions; lithostratigraphy;magmas; Mesozoic; metamorphic rocks; Paleogene; Paleozoic; partialmelting; Phanerozoic; plutonic rocks; south-central Idaho;stratigraphy;

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systems; Tertiary; United States LANGUAGE: English PUBLICATION YEAR: 1984 UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 6) GEOREF: 1985-070367 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 12 Stratigraphy COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Type: geologic map FEATURES: illus. MONOGRAPH TITLE: Tertiary alkalic igneous activity, potassic fenitization, carbonatiticmagmatism, and hydrothermal activity in the central and southeasternBear Lodge Mountains, Crook County, Wyoming ORGANIZATION: University of North Dakota, Grand Forks, ND, United States USA PAGES DATE: 232 pp. PUBLICATION TYPE: Thesis or dissertation; Map; Master's; Monographic ACCESSION NUMBER: 1985-070367 AUTHORS: Jenner, Gordon A, Jr COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 12 Stratigraphy COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkalic composition; Bear Lodge Mountains; carbonatites; Cenozoic;classification; Crook County Wyoming; differentiation; dikes; Eocene;fenitization; fractional crystallization; genesis; geologic maps;Great Plains; hydrothermal alteration; igneous processes; igneousrocks; intrusions; magmas; maps; metasomatism; North America;northeastern Wyoming; Paleogene; partial melting; petrology; plutonicrocks; stratigraphy; Tertiary; United States; uplifts; veins; Wyoming LANGUAGE: English PUBLICATION YEAR: 1984 UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 7) GEOREF: 1985-085454 CODEN: ECGLAL COLLECTION AUTHORS: 27A, Economic geology, geology of ore deposits COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. BOOK EDITORS: Sawkins, Frederick J; Sillitoe, Richard H FEATURES: References: 53; illus. incl. 5 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N293000,N303000 Longitude:W1093000,W1100000 MONOGRAPH TITLE: A special issue devoted to breccia-hosted ores PUBLICATION TYPE: Serial; Conference document; Analytic AUTHOR AFFILIATION: Univ. Minn., Dep. Geol. and Geophys., Minneapolis, MN, United States USA AUTHORS: Scherkenbach, Daryl A; Sawkins, Frederick J; Seyfried, William E, Jr COLLECTION AUTHORS: 27A, Economic geology, geology of ore deposits CONFERENCE INFORMATION: Brecciation and mineralization; geologic occurrence and

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genesis, Colorado Springs, CO, United States, Sept. 18-22, 1983 COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: breccia; breccia pipes; brecciation; clastic rocks; controls; copper ores; Cumobabi; economic geology; fluid inclusions; geochemistry; geologic thermometry; host rocks; hydrothermal alteration; hydrothermal processes; inclusions; intrusions; mechanical controls; metal ores; metasomatism; Mexico; mineral deposits, genesis; molybdenum ores; ore-forming fluids; paleosalinity; pipes; polymetallic ores; sedimentary rocks; SEM data; Sonora Mexico; structural controls ISSN: 0361-0128 LANGUAGE: English NOTES: Univ. Minn., Sch. Earth Sci.; Contrib. No. 1052 PUBLISHER: Economic Geology Publishing Company, Lancaster, PA, United States USA PUBLICATION YEAR: 1985 SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists, vol.80, no.6, pp.1566-1592, Oct 1985 TITLE: Geologic, fluid inclusion, and geochemical studies of the mineralized breccias at Cumobabi, Sonora, Mexico UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 8) GEOREF: 1986-004239 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 101; 48 plates MONOGRAPH TITLE: The petrography and petrochemistry of the Eocene volcanics,Rattlesnake Hills, central Wyoming ORGANIZATION: University of New Brunswick, Fredericton, NB, Canada CAN PAGES DATE: 338 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1986-004239 AUTHORS: Stupak, William A COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: Canada CAN DESCRIPTORS: alkalic composition; calc-alkalic composition; central Wyoming;dacites; differentiation; fractional crystallization; genesis; igneousrocks; magmas; Natrona County Wyoming; petrography; petrology;Rattlesnake Hills; review; United States; volcanic rocks; volcanism;Wyoming LANGUAGE: English PUBLICATION YEAR: 1984 UPDATE CODE: 1986 ---------------------------------------------------------------------------------------------------------- (Reference 9) GEOREF: 1986-017484 COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Uranium-lead zircon ages and crustal contamination of the

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northeasternIdaho Batholith ORGANIZATION: Western Michigan University, Kalamazoo, MI, United States (USA) PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1986-017484 AUTHORS: Dexter, James J COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: absolute age; batholiths; composition; crust; dates; geochronology;Idaho; Idaho Batholith; igneous rocks; intrusions; magmas; plutonicrocks; pollution; U/Pb; United States LANGUAGE: English PUBLICATION YEAR: 1984 UPDATE CODE: 1986 ---------------------------------------------------------------------------------------------------------- (Reference 10) GEOREF: 1992-016137 CODEN: XGROAG COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 40; illus. incl. 41 tables, sketch map PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: _NULL_ AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, CA, United States USA AUTHORS: Sikora, R F; Moore, J G; Oliver, H W COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: batholiths California catalogs Central California data processing density distribution Fresno County California granites gravity anomalies igneous rocks intrusions Inyo County California Madera County California Mariposa County California petrology physical properties plutonic rocks plutons Sierra Nevada Batholith Tulare County California Tuolumne County California United States USGS ISSN: 0196-1497 LANGUAGE: English PUBLISHER: OF 91-0570-A PUBLICATION YEAR: 1991 SOURCE: Open-File Report - U. S. Geological Survey, Report: OF 91-0570-A, 77 pp., 1991 TITLE: Compilation and listing of 6,454 density measurements of samples from the central part of the Sierra Nevada Batholith, California UPDATE CODE: 1992 ---------------------------------------------------------------------------------------------------------- (Reference 11) GEOREF: 1972-001101 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute.

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MONOGRAPH TITLE: The petrography and petrology of the phonolite porphyry intrusions ofthe northern Black Hills, South Dakota ORGANIZATION: University of Iowa, Iowa City, IA, United States USA PAGES DATE: 199 pp. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic ACCESSION NUMBER: 1972-001101 AUTHORS: Kirchner, James Gary COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Black Hills; genesis; igneous rocks; intrusions; petrography;petrology; phonolites; South Dakota; United States; volcanic rocks LANGUAGE: English NOTES: Diss. Abstr. Int., Vol. 32, No. 5, p. 2797B-2798B PUBLICATION YEAR: 1971 UPDATE CODE: 1972 ---------------------------------------------------------------------------------------------------------- (Reference 12) GEOREF: 1972-010381 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. PUBLICATION TYPE: Serial; Analytic ACCESSION NUMBER: 1972-010381 AUTHORS: Krueger-Harold-W; Schilling-John-H BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; dates-; geochronology-; K-Ar; minerals-; Nevada-; United-States; whole-rocks DOCUMENT TYPE: Serial ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology. Socorro, NM, United States. 1971. PUBLICATION YEAR: 1971 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Isochron/West. 1; Pages 9-14. 1971. TITLE: Geochron/ Nevada Bureau of Mines K/ Ar age determinations; list 1. UPDATE CODE: 1972 ---------------------------------------------------------------------------------------------------------- (Reference 13) GEOREF: 1972-010384 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. PUBLICATION TYPE: Serial; Analytic

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ACCESSION NUMBER: 1972-010384 AUTHORS: McDowell, Fred W COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; dates; geochronology; igneous rocks; K/Ar; United States; west ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology, Socorro, NM, United States USA PUBLICATION YEAR: 1971 SOURCE: Isochron/West, vol.2, pp.1-16, 1971 TITLE: K-Ar ages of igneous rocks from the western United States UPDATE CODE: 1972 ---------------------------------------------------------------------------------------------------------- (Reference 14) GEOREF: 1972-022653 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. FEATURES: sketch map PUBLICATION TYPE: Serial; Analytic ACCESSION NUMBER: 1972-022653 AUTHORS: Edwards, George; McLaughlin, William A COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; alkali metals; alkaline earth metals; argon; California; dates; geochronology; gneisses; igneous rocks; isotopes; K/Ar; meta-andesite; metaigneous rocks; metals; metamorphic rocks; Nevada; noble gases; plutonic; potassium; Rb /Sr; rubidium; schists; strontium; United States; Utah; volcanic ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology, Socorro, NM, United States USA PUBLICATION YEAR: 1972 SOURCE: Isochron/West, vol.3, pp.1-7, 1972 TITLE: Shell list No. 1; K/Ar and Rb/Sr Age Determinations of California, Nevada and Utah rocks and minerals UPDATE CODE: 1972 ---------------------------------------------------------------------------------------------------------- (Reference 15) GEOREF: 1973-004166 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: sketch map

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PUBLICATION TYPE: Serial; Analytic ACCESSION NUMBER: 1973-004166 AUTHORS: Pansze, Arthur J COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; alkali metals; argon; Cenozoic; dates;geochronology; Idaho; igneous rocks; intrusions; isotopes; K/Ar;metals; noble gases; Owyhee County Idaho; potassium; ratios; SilverCity Idaho; Tertiary; United States; volcanism; volcanology ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1972 SOURCE: Isochron/West, vol.4, pp.1-4, 1972 TITLE: K-Ar ages of plutonism, volcanism, and mineralization, Silver Cityregion, Owyhee County, Idaho UPDATE CODE: 1973 ---------------------------------------------------------------------------------------------------------- (Reference 16) GEOREF: 1973-010262 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: sketch map PUBLICATION TYPE: Serial; Analytic ABSTRACT: Iron Mountain quartz diorite dated 200 m.y., Mann Creek granodiorite120 m.y., interpreted as two separate episodes of Mesozoic plutonism ACCESSION NUMBER: 1973-010262 AUTHORS: Henricksen, Thomas A; Skurla, Steven J; Field, Cyrus W COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; dates; geochronology; Idaho; igneous rocks; intrusions;Iron Mountain Quartz Diorite; K/Ar; Mann Creek Granodiorite; Mesozoic;plutons; United States; west ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1972 SOURCE: Isochron/West, vol.5, pp.13-16, 1972 TITLE: K-Ar dates for plutons from the Iron Mountain and Sturgill Peak areasof western Idaho UPDATE CODE: 1973 ---------------------------------------------------------------------------------------------------------- (Reference 17) GEOREF: 1973-015447 CODEN: XGPPA9 COLLECTION AUTHORS: 12, Stratigraphy COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: illus. incl. geol. sketch maps

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MONOGRAPH TITLE: Stratigraphic framework of the Absaroka Volcanic Supergroup in theYellowstone National Park region PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: Eocene volcanic rocks, definitions of new groups, formations, andmembers, lithologic and age data ACCESSION NUMBER: 1973-015447 AUTHORS: Smedes, Harry W; Prostka, Harold J COLLECTION AUTHORS: 12, Stratigraphy COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Cenozoic; distribution; Eocene; igneous rocks; Montana; Paleogene;stratigraphy; Tertiary; United States; USGS; volcanic rocks; Wyoming ISSN: 1044-9612 LANGUAGE: English NOTES: Geology of Yellowstone National Park PUBLICATION YEAR: 1972 RESEARCH PROGRAM: P 0729-C SOURCE: U. S. Geological Survey Professional Paper, Report: P 0729-C,pp.C1-C33, 1972 UPDATE CODE: 1973 ---------------------------------------------------------------------------------------------------------- (Reference 18) GEOREF: 1973-021261 COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Fission track and K-Ar dates of the northeastern border zone of theIdaho Batholith Cretaceous, Idaho ORGANIZATION: University of Montana, Missoula, MT, United States USA PAGES DATE: 32 PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1973-021261 AUTHORS: Ferguson, James Ardon COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; batholiths; Cretaceous; dates; fission-track;geochronology; Idaho; Idaho Batholith; igneous rocks; intrusions;K/Ar; Mesozoic; northeast; United States LANGUAGE: English PUBLICATION YEAR: 1972 UPDATE CODE: 1973 ---------------------------------------------------------------------------------------------------------- (Reference 19) GEOREF: 1973-033918 CODEN: XGPPA9 COLLECTION AUTHORS: 13, Areal geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Type: colored geologic maps

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FEATURES: illus., plates MONOGRAPH TITLE: Geology of pre-Tertiary rocks in the northern part of YellowstoneNational Park, Wyoming PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: Precambrian metamorphic rocks, Paleozoic except Silurian sedimentaryrocks, section on early Tertiary intrusions, structural analysis ACCESSION NUMBER: 1973-033918 AUTHORS: Ruppel, Edward T COLLECTION AUTHORS: 13, Areal geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: areal geology; complexes; displacements; faults; interpretation;intrusions; lithostratigraphy; Paleozoic; petrology; Phanerozoic;Precambrian; reverse faults; sedimentary rocks; stratigraphy;structural analysis; United States; USGS; Wyoming; YellowstoneNational Park ISSN: 1044-9612 LANGUAGE: English NOTES: Date Issued: 1973001973. Geology of Yellowstone National Park PUBLICATION YEAR: 1972 RESEARCH PROGRAM: P 0729-A SOURCE: U. S. Geological Survey Professional Paper, Report: P 0729-A,pp.A1-A66, 1972 UPDATE CODE: 1973 ---------------------------------------------------------------------------------------------------------- (Reference 20) GEOREF: 1974-019595 COLLECTION AUTHORS: 02C, Geochemistry of rocks, soils, and sediments COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Geochemistry of the Idaho Batholith ORGANIZATION: University of Idaho, Moscow, ID, United States USA PAGES DATE: 128 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1974-019595 AUTHORS: De Renne, Paul COLLECTION AUTHORS: 02C, Geochemistry of rocks, soils, and sediments COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: batholiths; geochemistry; Idaho; Idaho Batholith; igneous rocks;intrusions; United States LANGUAGE: English PUBLICATION YEAR: 1972 UPDATE CODE: 1974 ---------------------------------------------------------------------------------------------------------- (Reference 21) GEOREF: 1974-033644 CODEN: GLGYBA COLLECTION AUTHORS: 03, Geochronology

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COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: Geol. sketch map PUBLICATION TYPE: Serial; Analytic ABSTRACT: Eocene volcanism, minimum time span of 5 m.y. ACCESSION NUMBER: 1974-033644 AUTHORS: Pekarek, Alfred H; Marvin, Richard F; Mehnert, Harald H COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; Cenozoic; central; dates; duration; Eocene; geochronology; igneous rocks; K/Ar; Natrona County Wyoming; Paleogene; phonolites; Rattlesnake Hills; rhyodacites; Tertiary; United States; volcanic; volcanic rocks; volcanism; volcanology; Wyoming ISSN: 0091-7613 LANGUAGE: English PUBLICATION YEAR: 1974 SOURCE: Geology Boulder, vol.2, no.6, pp.283-285, 1974 TITLE: K-Ar Ages of the Volcanics in the Rattlesnake Hills, Central Wyoming UPDATE CODE: 1974 ---------------------------------------------------------------------------------------------------------- (Reference 22) GEOREF: 1974-039233 CODEN: XGPPA9 COLLECTION AUTHORS: 27, Economic geology of ore deposits COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Scale:1|12,000. Type: colored geologic map FEATURES: illus., plates MONOGRAPH TITLE: Geology and ore deposits of the Rico District, Colorado PUBLICATION TYPE: Serial; Report; Map; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: Original silver mine, later lead-zinc mining ACCESSION NUMBER: 1974-039233 AUTHORS: McKnight, Edwin T COLLECTION AUTHORS: 27, Economic geology of ore deposits COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Colorado; Dolores County Colorado; economic geology; metal ores; mineral deposits, genesis; polymetallic ores; processes; United States; USGS ISSN: 1044-9612 LANGUAGE: English PUBLICATION YEAR: 1974 RESEARCH PROGRAM: P 0723 SOURCE: U. S. Geological Survey Professional Paper, Report P 0723, 100 pp., 1974 UPDATE CODE: 1974 ---------------------------------------------------------------------------------------------------------- (Reference 23) GEOREF: 1975-020271 CODEN: BUGMAF

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COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: illus. incl. geol. sketch maps PUBLICATION TYPE: Serial; Analytic ACCESSION NUMBER: 1975-020271 AUTHORS: Miller, Fred K; Engels, J C COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; ages; amphibole group; biotite; Cenozoic; chainsilicates; clinoamphibole; dates; discordant; genesis; geochronology;granitic; hornblende; Idaho; igneous rocks; interpretation;intrusions; K/Ar; Mesozoic; mica group; minerals; muscovite; north;northeast; plutons; sheet silicates; silicates; Tertiary; UnitedStates; Washington ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1975 SOURCE: Geological Society of America Bulletin, vol.86, no.4, pp.517-528,1975 TITLE: Distribution and trends of discordant ages of the plutonic rocks ofnortheastern Washington and Northern Idaho UPDATE CODE: 1975 ---------------------------------------------------------------------------------------------------------- (Reference 24) GEOREF: 1975-020284 CODEN: BUGMAF ACCESSION NUMBER: 1975-020284 AUTHORS: Carman-Max-F Jr.; Cameron-Maryellen; Gunn-Bernard; Cameron-Kenneth-L; Butler-J-C BIB LEVEL: Analytic CATEGORY CODES: 05-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Big-Bend-National-Park; Brewster-County-Texas; Cenozoic-; chemical-analysis; chemical-composition; data-; differentiation-; genesis-; geochemistry-; igneous-rocks; intrusions-; leucomonzonite-; lower-Tertiary; magmas-; mineral-composition; monzonites-; petrography-; petrology-; plutonic-rocks; Rattlesnake-Mountain; sills-; syenites-; Tertiary-; Texas-; United-States DOCUMENT TYPE: Serial ILLUSTRATION: illus. incl. geol. sketch map. ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America GSA. Boulder, CO, United States. 1975. PUBLICATION YEAR: 1975 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Geological Society of America Bulletin. 86; 2, Pages 177-193. 1975. . TITLE: Petrology of Rattlesnake Mountain Sill, Big Bend National Park, Texas. UPDATE CODE: 1975 ----------------------------------------------------------------------------------------------------------

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(Reference 25) GEOREF: 1975-020308 CODEN: BUGMAF COLLECTION AUTHORS: 05, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: illus. incl. geol. sketch map PUBLICATION TYPE: Serial; Analytic ACCESSION NUMBER: 1975-020308 AUTHORS: Zen, E-an; Marvin, R F; Mehnert, H H COLLECTION AUTHORS: 05, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; batholiths; Beaverhead County Montana; biotite;Boulder Batholith; Cambrian; chemical composition; contact;Cretaceous; data; dates; diorites; granites; granodiorites; igneousrocks; intrusions; K/Ar; Mesozoic; metamorphic rocks; metamorphism;mica group; mineral composition; Montana; Paleozoic; petrology;Pioneer Batholith; Pioneer Mountains; plutonic; plutonic rocks; quartzdiorites; sheet silicates; silicates; Silver Hill Formation;southwest; United States; upper Mesozoic ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1975 SOURCE: Geological Society of America Bulletin, vol.86, no.3, pp.367-370,1975 TITLE: Preliminary petrographic, chemical, and age data on some intrusive andassociated contact metamorphic rocks, Pioneer Mountains, southwesternMontana UPDATE CODE: 1975 ---------------------------------------------------------------------------------------------------------- (Reference 26) GEOREF: 1976-019966 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. Tex., Dept. Geol. Sci., Austin, Tex., United States USA ACCESSION NUMBER: 1976-019966 AUTHORS: McDowell, F W COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Cenozoic; Cordillera region; Cordilleran region; Cretaceous; data; dates; geochronology; igneous rocks; K/Ar; Mesozoic; plutonic; Tertiary; United States; west ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1971 SOURCE: Isochron/West, no.2, pp.1-16, Aug 1971 TITLE: K-Ar ages of igneous rocks from the western United States UPDATE CODE: 1976 ----------------------------------------------------------------------------------------------------------

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(Reference 27) GEOREF: 1976-019973 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. FEATURES: sketch map PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, Calif., United States USA ACCESSION NUMBER: 1976-019973 AUTHORS: Johnson, M G; Todd, V R COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Arizona; dates; extrusive; geochronology; igneous rocks; intrusive; K/Ar; Rb/Sr; southeast; summary; U/Pb; United States ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology, Socorro, NM, United States USA PUBLICATION YEAR: 1973 SOURCE: Isochron/West, no.8, pp.1-20, Dec 1973 TITLE: A summary of radiometric age determinations of igneous rocks from southeastern Arizona UPDATE CODE: 1976 ---------------------------------------------------------------------------------------------------------- (Reference 28) GEOREF: 1976-019984 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: geol. sketch map PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: U. S. Geol. Surv., Denver, Colo., United States USA ACCESSION NUMBER: 1976-019984 AUTHORS: Marvin, R F; Wier, K L; Mehnert, H H; Merritt, V COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; basalts; Black Butte; Cenozoic; dates; geochronology;igneous rocks; K/Ar; Montana; northwest; rhyolites; techniques;Tertiary; United States; Virginia City; volcanic rocks ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1974 SOURCE: Isochron/West, no.10, pp.17-20, Aug 1974 TITLE: K-Ar ages of selected Tertiary igneous rocks in southwestern Montana UPDATE CODE: 1976 ----------------------------------------------------------------------------------------------------------

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(Reference 29) GEOREF: 1976-031483 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: illus. incl. geol. sketch maps MONOGRAPH TITLE: The geochronometry of Idaho PUBLICATION TYPE: Serial; Monographic ACCESSION NUMBER: 1976-031483 AUTHORS: Armstrong, R L COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: absolute age; data; dates; geochronology; granitic; Idaho; igneous rocks; K/Ar; Pb-alpha; Phanerozoic; plutonic; Rb/Sr; regional; review; United States; volcanic ISSN: 0099-6882 LANGUAGE: English NOTES: Continuation of article appears in Isochron/West, No. 15, 1976 PUBLICATION YEAR: 1975 SOURCE: Isochron/West, no.14, 50 pp., Dec 1975 UPDATE CODE: 1976 ---------------------------------------------------------------------------------------------------------- (Reference 30) GEOREF: 1976-900001 (unpublished Georef; Navdat only) AUTHORS: McKee,Edwin H.,Tarshis,Andrew L.,Marvin,Richard F. PUBLICATION YEAR: 1976 SOURCE: Isochron/West,no.16,pp.15-27, August 1976 ---------------------------------------------------------------------------------------------------------- (Reference 31) GEOREF: 1976-900011 (unpublished Georef; Navdat only) CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. PUBLICATION TYPE: Serial; Analytic AUTHORS: Armstrong, Richard Lee; Speed, Robert C; Graustein, W.C.; Young, A.Y. COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; amphibole group; biotite; chain silicates;clinoamphibole; clinopyroxene; dates; Dixie Valley; geochronology;hornblende; K/Ar; mica group; Mina; Nevada; pyroxene group; sheetsilicates; silicates; United States LANGUAGE: English PUBLICATION YEAR: 1976 SOURCE: Isochron/West, vol.16, pp.1-6, 1976 TITLE: Potassium-argon dates from Arizona, Montana, Nevada, Utah, and Wyoming

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---------------------------------------------------------------------------------------------------------- (Reference 32) GEOREF: 1976-900033 (unpublished Georef; Navdat only) COLLECTION AUTHORS: 13, Areal geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: The isotopic composition of strontium and the origin of igneous intrusive rocks of the northern Black Hills province of western South Dakota ORGANIZATION: South Dakota School of Mines and Technology, Rapid City, SD, United States USA PAGES DATE: 60 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1976-000000 AUTHORS: Olson, Kathleen Rae COLLECTION AUTHORS: 13, Areal geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Black Hills, South Dakota, strontium, isotopes, Tertiary, igneous, intrusions LANGUAGE: English PUBLICATION YEAR: 1976 UPDATE CODE: 0 ---------------------------------------------------------------------------------------------------------- (Reference 33) GEOREF: 1977-017250 CODEN: BUGMAF COLLECTION AUTHORS: 13, Areal geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 29; illus. incl. table, geol. sketch map PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: San Diego State Univ., Dep. Geol. Sci., San Diego, Calif., UnitedStates USA ACCESSION NUMBER: 1977-017250 AUTHORS: Gastil, R G; Krummenacher, D COLLECTION AUTHORS: 13, Areal geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; aerial photography; areal geology; Cenozoic; coastal;Cretaceous; data; dates; drainage patterns; East Pacific; faults;fluvial features; geochronology; geomorphology; grabens; granitic;Gulf of California; igneous rocks; K/Ar; Kino; Lobos; Mesozoic;Mexico; North Pacific; Northeast Pacific; Pacific Ocean; petrology;photogeology; Sonora Mexico; structural geology; structure; tectonics;Tertiary; thrust; Tiburon Island; valleys; volcanic ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1977 SOURCE: Geological Society of America Bulletin, vol.88, no.2, pp.189-198, Feb1977 TITLE: Reconnaissance geology of coastal Sonora between Puerto Lobos andBahia Kino UPDATE CODE: 1977

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---------------------------------------------------------------------------------------------------------- (Reference 34) GEOREF: 1977-025447 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Geochemical and petrographic investigation of selected Tertiaryigneous intrusions of the northern Black Hills, South Dakota ORGANIZATION: University of Toledo, Toledo, OH, United States USA PAGES DATE: 67 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1977-025447 AUTHORS: Armour, Michael D COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Black Hills; Cenozoic; chemical composition; differentiation;emplacement; genesis; geochemistry; granites; igneous rocks;intrusions; magmas; monzonites; petrography; petrology; phonolites;plutonic; plutonic rocks; plutons; quartz monzonite; rhyolites; SouthDakota; syenites; Tertiary; United States; volcanic rocks; west LANGUAGE: English PUBLICATION YEAR: 1975 UPDATE CODE: 1977 ---------------------------------------------------------------------------------------------------------- (Reference 35) GEOREF: 1977-025450 COLLECTION AUTHORS: 13, Areal geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Bedrock geology of the Whitewood Peak area, Lawrence County, SouthDakota ORGANIZATION: University of Toledo, Toledo, OH, United States USA PAGES DATE: 89 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1977-025450 AUTHORS: Boyd, Thomas M COLLECTION AUTHORS: 13, Areal geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: areal geology; causes; Cenozoic; domes; emplacement; Eocene; faults;fold axes; folds; fractures; interpretation; intrusions; LawrenceCounty South Dakota; lineation; Paleogene; Paleozoic; petrology;phonolitic; plutons; rhyolitic; South Dakota; stratigraphy; structuralanalysis; structural geology; structure; tectonics; Tertiary; UnitedStates; Whitewood Peak LANGUAGE: English PUBLICATION YEAR: 1975 UPDATE CODE: 1977 --------------------------------------------------------------------------------

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-------------------------- (Reference 36) GEOREF: 1977-028575 COLLECTION AUTHORS: 02D, Isotope geochemistry COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Rb-Sr isotope geology of the Idaho Batholith and some associatedrocks ORGANIZATION: University of Idaho, Moscow, ID, United States USA PAGES DATE: 131 pp. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic ACCESSION NUMBER: 1977-028575 AUTHORS: De Renne, Paul COLLECTION AUTHORS: 02D, Isotope geochemistry COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; alkali metals; alkaline earth metals; batholiths;differentiation; genesis; geochemistry; Idaho; Idaho Batholith;intrusions; isotopes; magmas; metals; Precambrian; ratios; Rb/Sr;rubidium; strontium; United States LANGUAGE: English NOTES: Diss. Abstr. Int., Vol. 37, No. 7, p. 3310B-3311B, 1977 PUBLICATION YEAR: 1976 UPDATE CODE: 1977 ---------------------------------------------------------------------------------------------------------- (Reference 37) GEOREF: 1977-047404 CODEN: GLGYBA COLLECTION AUTHORS: 12, Stratigraphy COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 18; illus. incl. table, geol. sketch map LATITUDE LONGITUDE: Latitude:N423000,N430000 Longitude:W1070000,W1073000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. Wyo., Dep. Geol., Laramie, Wyo., United States USA ACCESSION NUMBER: 1977-047404 AUTHORS: Shive, P N; Pekarek, A K; Zawislak, R L COLLECTION AUTHORS: 12, Stratigraphy COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Cenozoic; central; data; duration; Eocene; Fremont County Wyoming; igneous activity; igneous rocks; intrusions; Natrona County Wyoming; Paleogene; paleomagnetism; pole positions; Rattlesnake Hills; reversals; stratigraphy; Tertiary; United States; volcanic rocks; volcanism; Wyoming ISSN: 0091-7613 LANGUAGE: English PUBLICATION YEAR: 1977 SOURCE: Geology Boulder, vol.5, no.9, pp.563-566, Sep 1977 TITLE: Volcanism in the Rattlesnake Hills of central Wyoming; a paleomagnetic study UPDATE CODE: 1977 --------------------------------------------------------------------------------

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-------------------------- (Reference 38) GEOREF: 1978-010575 LATITUDE LONGITUDE: LAT| N350000; N420000; LONG: W1150000; W1220000. ACCESSION NUMBER: 1978-010575 BOOK AUTHORS: Brem-Gerald-F BOOK TITLE: Petrogenesis of late Tertiary potassic volcanic rocks in Sierra Nevada and western Great Basin. BIB LEVEL: Monograph CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: alkali-basalts; alkali-metals; alkaline-earth-metals; andesites-; basaltic-composition; basalts-; Basin-and-Range-Province; California-; Cenozoic-; chemical-composition; composition-; genesis-; geochemistry-; Great-Basin; igneous-rocks; isotopes-; magmas-; mantle-; metals-; Neogene-; North-America; partial-melting; petrology-; plate-tectonics; potassium-; potassium-rich-composition; quartz-latite; ratios-; rhyodacites-; Sierra-Nevada; strontium-; subduction-; Tertiary-; trachyandesites-; trachybasalts-; United-States; upper-mantle; upper-Tertiary; volcanic-rocks DEGREE GRANTED: Doctoral DEGREE GRANTING INSTITUTION: University of California, Riverside. Riverside, CA, United States. Pages 361. 1977. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English NOTES: Diss. Abstr. Int., Vol. 38, No. 6, p. 2579B-2580B, 1977 PUBLICATION YEAR: 1977 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1978 ---------------------------------------------------------------------------------------------------------- (Reference 39) GEOREF: 1978-026062 CODEN: BUGMAF COLLECTION AUTHORS: 12, Stratigraphy COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. FEATURES: References: 64 LATITUDE LONGITUDE: Latitude:N313000,N343000 Longitude:W1103000,W1144500 PAGES DATE: table, sects., geol. sketch map PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Exxon Co., Midland, Tex., United States USA ACCESSION NUMBER: 1978-026062 AUTHORS: Eberly, L D; Stanley, T B, Jr COLLECTION AUTHORS: 12, Stratigraphy COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Arizona; basin range structure; biotite; block structures; Cenozoic; chemically precipitated rocks; clastic rocks; correlation; dates; drainage patterns; environment; evaporites; faults; fluvial features; geochronology; geomorphology; igneous rocks; K/Ar; landform evolution; lithostratigraphy; Maricopa County Arizona; mica group; Pima County Arizona; Pinal County Arizona; rivers; sedimentary rocks; sedimentation; sheet silicates; silicates; stratigraphy; streams; tectonics; terrestrial environment;

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unconformities; United States; volcanic rocks; whole rock; Yuma County Arizona ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America GSA, Boulder, CO, United States USA PUBLICATION YEAR: 1978 SOURCE: Geological Society of America Bulletin, vol.89, no.6, pp.921-940, table, sects., geol. sketch map, Jun 1978 TITLE: Cenozoic stratigraphy and geologic history of southwestern Arizona UPDATE CODE: 1978 ---------------------------------------------------------------------------------------------------------- (Reference 40) GEOREF: 1978-026075 CODEN: BUGMAF COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 47; illus. incl. tables, geol. sketch maps LATITUDE LONGITUDE: Latitude:N460000,N470000 Longitude:W1140000,W1150000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. Kans., United States USA ACCESSION NUMBER: 1978-026075 AUTHORS: Chase, R B; Bickford, M E; Tripp, S E COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; batholiths; Clearwater County Idaho; contact;contact metamorphism; Cretaceous; dates; genesis; geochronology;gneisses; granites; granodiorites; Idaho; Idaho Batholith; IdahoCounty Idaho; igneous rocks; intrusions; isochrons; Mesozoic;metamorphic rocks; metamorphism; Missoula County Montana; Montana;nesosilicates; orthosilicates; overprinting; plutonic rocks; RavalliCounty Montana; Rb/Sr; silicates; U/Pb; United States; UpperCretaceous; whole rock; zircon ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1978 SOURCE: Geological Society of America Bulletin, vol.89, no.9, pp.1325-1334,Sep 1978 TITLE: Rb-Sr and U-Pb isotopic studies of the northeastern Idaho Batholithand border zone UPDATE CODE: 1978 ---------------------------------------------------------------------------------------------------------- (Reference 41) GEOREF: 1978-034495 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 25; sketch map PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: U. S. Geol. Surv.Denver, Colo.USA, United States

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ACCESSION NUMBER: 1978-034495 AUTHORS: Marvin-R-F; Cole-J-C BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; catalogs-; dates-; geochronology-; government-agencies; research-; survey-organizations; surveys-; U.-S.-Geological-Survey DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 25; sketch map. ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology. Socorro, NM, United States. 1978. PUBLICATION YEAR: 1978 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Isochron/West. 22, Pages 3-14. 1978. TITLE: Radiometric ages; Compilation A, U. S. Geological Survey. UPDATE CODE: 1978 ---------------------------------------------------------------------------------------------------------- (Reference 42) GEOREF: 1978-040263 CODEN: ESCBAF COLLECTION AUTHORS: 13, Areal geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Type: geologic map FEATURES: References: 97; illus. incl. tables MONOGRAPH TITLE: The structural geology and volcanic petrology of the Rattlesnake Hills, Wyoming PUBLICATION TYPE: Serial; Map; Monographic AUTHOR AFFILIATION: Mtn. Fuel Supply Co., Salt Lake City, Utah, United States USA ACCESSION NUMBER: 1978-040263 AUTHORS: Pekarek, A H COLLECTION AUTHORS: 13, Areal geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: areal geology; Cenozoic; differentiation; distribution; faults; geologic maps; igneous rocks; intrusions; latite; magmas; maps; Natrona County Wyoming; phonolites; polyphase processes; pyroclastics; quartz latite; Rattlesnake Hills; rhyodacites; rhyolites; structural geology; tectonics; Tertiary; trachyandesites; trachytes; United States; volcanic rocks; Wyoming ISSN: 0012-8236 LANGUAGE: English PUBLICATION YEAR: 1977 SOURCE: Earth Science Bulletin, vol.10, no.4, 30 pp., Dec 1977 UPDATE CODE: 1978 ----------------------------------------------------------------------------------------------------------

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(Reference 43) GEOREF: 1979-006332 CODEN: GLGYBA COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 17; illus. incl. tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N351500,N373000 Longitude:W1170000,W1190000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: U. S. Geol. Surv., United States USA ACCESSION NUMBER: 1979-006332 AUTHORS: Chen, J H; Moore, J G COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; calc-alkalic composition; California; chemical composition; data; dates; dike swarms; dikes; diorites; distribution; Fresno County California; geochronology; granite porphyry; granites; granitic composition; granodiorites; igneous rocks; Independence dike swarm; intrusions; Inyo County California; Jurassic; Mesozoic; nesosilicates; orientation; orthosilicates; plate tectonics; plutonic rocks; plutons; Sierra Nevada; silicates; subduction; Tulare County California; U/Pb; United States; Upper Jurassic; whole rock; zircon ISSN: 0091-7613 LANGUAGE: English PUBLISHER: Geological Society of America GSA, Boulder, CO, United States USA PUBLICATION YEAR: 1979 SOURCE: Geology Boulder, vol.7, no.3, pp.129-133, Mar 1979 TITLE: Late Jurassic Independence dike swarm in eastern California UPDATE CODE: 1979 ---------------------------------------------------------------------------------------------------------- (Reference 44) GEOREF: 1979-012750 CODEN: AJSCAP COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. FEATURES: References: 63; illus. incl. tables, geol. sketch maps LATITUDE LONGITUDE: Latitude:N325000,N334500 Longitude:W1143000,W1160000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. Calif., United States USA; San Diego State Univ., United States USA ACCESSION NUMBER: 1979-012750 AUTHORS: Crowe, B M; Crowell, J C; Krummenacher, D COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; breccia; California; Cenozoic; clastic rocks; data; dates; evolution; faults; geochemistry; geochronology; igneous rocks; Imperial County California; K/Ar; lava; lava flows; lithostratigraphy; major elements; middle Tertiary; Pacific Coast; plate tectonics; plutonic rocks; Riverside County California; Salton Creek Fault; San Bernardino County California; sedimentary rocks; Southern California; stratigraphy; subduction; tectonics; tectonophysics; Tertiary; United States; volcanic rocks; volcanism; volcanology; Western U.S. ISSN: 0002-9599

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LANGUAGE: English PUBLISHER: Kline Geology Laboratory, Yale University, New Haven, CT, United States USA PUBLICATION YEAR: 1979 SOURCE: American Journal of Science, vol.279, no.2, pp.186-216, Feb 1979 TITLE: Regional stratigraphy, K-Ar ages, and tectonic implications of Cenozoic volcanic rocks, southeastern California UPDATE CODE: 1979 ---------------------------------------------------------------------------------------------------------- (Reference 45) GEOREF: 1980-012226 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. LATITUDE LONGITUDE: Latitude:N441000,N443500 Longitude:W1033000,W1040000 MONOGRAPH TITLE: Geology, alteration, and mineralization of the northern Cutting Stock,Lawrence County, South Dakota ORGANIZATION: South Dakota School of Mines & Technology, Rapid City, SD, UnitedStates USA PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1980-012226 AUTHORS: Larsen, Richard K COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Cenozoic; Cutting Stock; dikes; emplacement; geochemistry;hydrothermal alteration; igneous rocks; intrusions; Lawrence CountySouth Dakota; Lead-Deadwood Dome; metasomatism; molybdenite;monzonites; petrology; phonolites; plutonic rocks; porphyry;rhyolites; South Dakota; stocks; sulfides; syenites; Tertiary; traceelements; United States; volcanic rocks LANGUAGE: English PUBLICATION YEAR: 1977 UPDATE CODE: 1980 ---------------------------------------------------------------------------------------------------------- (Reference 46) GEOREF: 1980-026241 CODEN: GLGYBA COLLECTION AUTHORS: 16, Structural geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 23; illus. incl. table, geol. sketch map LATITUDE LONGITUDE: Latitude:N341200,N344500 Longitude:W1134000,W1141500 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Marathon Oil Co., Denver Res. Cent., Littleton, Colo., United States USA ACCESSION NUMBER: 1980-026241 AUTHORS: Shackelford, T J COLLECTION AUTHORS: 16, Structural geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; allochthons; Arizona; Cenozoic; dates; displacements;

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faults; gneisses; gravity sliding; K/Ar; lower Tertiary; Mesozoic; metamorphic rocks; Mohave County Arizona; normal faults; Rawhide Mountains; structural geology; structure; tectonics; Tertiary; United States ISSN: 0091-7613 LANGUAGE: English PUBLISHER: Geological Society of America GSA, Boulder, CO, United States USA PUBLICATION YEAR: 1980 SOURCE: Geology Boulder, vol.8, no.4, pp.190-194, Apr 1980 TITLE: Tertiary tectonic denudation of a Mesozoic-early Tertiary? gneiss complex, Rawhide Mountains, western Arizona UPDATE CODE: 1980 ---------------------------------------------------------------------------------------------------------- (Reference 47) GEOREF: 1980-028332 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 78; illus. incl. sketch map PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: U. S. Geol. Surv., Fed. Cent., Denver, Colo., United States USA ACCESSION NUMBER: 1980-028332 AUTHORS: Marvin, R F; Dobson, S W COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Antilles; Caribbean region; catalogs; dates;geochronology; government agencies; Greater Antilles; Puerto Rico;survey organizations; surveys; U. S. Geological Survey; United States;West Indies ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1979 SOURCE: Isochron/West, no.26, pp.3-30, Dec 1979 TITLE: Radiometric ages; compilation B, U. S. Geological Survey UPDATE CODE: 1980 ---------------------------------------------------------------------------------------------------------- (Reference 48) GEOREF: 1981-009077 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 9; illus. LATITUDE LONGITUDE: LAT: N420000; N434500; LONG: W1120000; W1160000. PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. B.C., Dep. Geol. Sci., Vancouver, B.C., Canada ACCESSION NUMBER: 1981-009077 AUTHORS: Armstrong-Richard-Lee; Harakal-J-E; Neill-W-M BIB LEVEL: Analytic

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CATEGORY CODES: 03-Geochronology COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Ada-County-Idaho; Blaine-County-Idaho; Boise-County-Idaho; Camas-County-Idaho; Cassia-County-Idaho; Cenozoic-; dates-; Elmore-County-Idaho; geochronology-; Gooding-County-Idaho; Idaho-; igneous-rocks; Jerome-County-Idaho; K-Ar; Lincoln-County-Idaho; Minidoka-County-Idaho; Power-County-Idaho; Quaternary-; Snake-River-plain; Twin-Falls-County-Idaho; United-States; volcanic-rocks DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 9; illus. ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology. Socorro, NM, United States. 1980. PUBLICATION YEAR: 1980 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Isochron/West. 27, Pages 5-10. 1980. TITLE: K-Ar dating of Snake River plain (Idaho) volcanic rocks; new results. UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 49) GEOREF: 1981-009078 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 4 LATITUDE LONGITUDE: Latitude:N450000,N460000 Longitude:W1112000,W1140000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Mont. State Univ., Dep. Earth Sci., Bozeman, MT, United States USA ACCESSION NUMBER: 1981-009078 AUTHORS: Chadwick, Robert A COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Beaverhead County Montana; Cenozoic; dates; Eocene;geochronology; igneous rocks; K/Ar; Madison County Montana; MeagherCounty Montana; Montana; Paleogene; Quaternary; southwest Montana;Tertiary; United States; volcanic rocks ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1980 SOURCE: Isochron/West, no.27, pp.11, Apr 1980 TITLE: Radiometric ages of some Eocene volcanic rocks UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 50)

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GEOREF: 1981-011636 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 8 LATITUDE LONGITUDE: Latitude:N451500,N460000 Longitude:W1113000,W1123000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. N.C., Geol. Dep., Chapel Hill, NC, United States USA ACCESSION NUMBER: 1981-011636 AUTHORS: Vitaliano, Charles J; Kish, Stephen; Towell, David G COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; batholiths; geochronology; granite-granodioritefamily; granitic composition; igneous rocks; intrusions; JeffersonCounty Montana; Madison County Montana; Montana; Tobacco RootBatholith; United States ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1980 SOURCE: Isochron/West, no.28, pp.13-15, Aug 1980 TITLE: Potassium-argon dates and strontium isotopic values for rocks of theTobacco Root Batholith, southwestern Montana UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 51) GEOREF: 1981-012248 CODEN: ECGLAL COLLECTION AUTHORS: 27, Economic geology of ore deposits COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 36; illus. incl. tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N330000,N333000 Longitude:W1103000,W1130000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, Calif., United States USA ACCESSION NUMBER: 1981-012248 AUTHORS: Creasey, S C COLLECTION AUTHORS: 27, Economic geology of ore deposits COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; Arizona; Cenozoic; copper ores; dates; disseminated deposits; economic geology; geochronology; Gila County Arizona; Globe Arizona; Globe-Miami District; granites; granodiorites; igneous rocks; intrusions; K/Ar; metal ores; Miami; mica; mineral deposits, genesis; ore deposits; overprinting; Paleocene; Paleogene; Pinal County Arizona; plutonic rocks; plutons; porphyry copper; Precambrian; Proterozoic; quartz monzonite; Tertiary; United States; upper Precambrian ISSN: 0361-0128 LANGUAGE: English PUBLISHER: Economic Geology Publishing Company, Lancaster, PA, United States USA PUBLICATION YEAR: 1980 SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists, vol.75, no.6, pp.830-844, Oct 1980 TITLE: Chronology of intrusion and deposition of porphyry copper ores, Globe-Miami District, Arizona

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UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 52) GEOREF: 1981-013663 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. LATITUDE LONGITUDE: Latitude:N441000,N450000 Longitude:W1040500,W1051000 MONOGRAPH TITLE: Geology and petrology of the Devils Tower, Missouri Buttes, and Barlow Canyon area, Crook County, Wyoming ORGANIZATION: University of North Dakota, Grand Forks, ND, United States USA PAGES DATE: 218 pp. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic ACCESSION NUMBER: 1981-013663 AUTHORS: Halvorson, Don Llewellyn AVAILABILITY: University Microfilms, Ann Arbor, MI, United States USA COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Analcime; Barlow Canyon; breccia; clastic rocks; composition; Crook County Wyoming; Devils Tower; differentiation; emplacement; fractional crystallization; framework silicates; genesis; geomorphology; igneous rocks; intrusions; laccoliths; magmas; mineral data; minerals; Missouri Buttes; necks; petrography; petrology; phonolites; sedimentary rocks; silicates; trachytes; United States; vents; volcanic features; volcanic necks; volcanic rocks; Wyoming; zeolite group LANGUAGE: English PUBLICATION YEAR: 1980 UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 53) GEOREF: 1981-016940 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. LATITUDE LONGITUDE: Latitude:N440000,N440000 Longitude:W1030000,W1040000 MONOGRAPH TITLE: Petrology of the Cenozoic igneous rocks of the Tinton District, BlackHills, South Dakota-Wyoming ORGANIZATION: University of North Dakota, Grand Forks, ND, United States USA PAGES DATE: 122 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1981-016940 AUTHORS: Ray, John T COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Black Hills uplift; Cenozoic; chemical composition; Crook CountyWyoming; dikes; genesis; Great Plains; igneous rocks; intrusions;lamprophyres; Lawrence County South Dakota; metabasite; metaigneousrocks; metamorphic rocks; metamorphism; North America; P-T conditions;petrology; plutonic rocks; Precambrian; quartz latite;

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quartztrachyte; rhyodacites; ring dikes; slates; South Dakota; stocks;Tinton District; United States; volcanic rocks; Wyoming LANGUAGE: English PUBLICATION YEAR: 1979 UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 54) GEOREF: 1981-016942 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Scale: 1|5,000. Type: geologic map LATITUDE LONGITUDE: Latitude:N440000,N440000 Longitude:W1040000,W1040000 MONOGRAPH TITLE: Geology of igneous extrusive and intrusive rocks in the Sundance area,Crook County, Wyoming ORGANIZATION: University of North Dakota, Grand Forks, ND, United States USA PAGES DATE: 97 pp. PUBLICATION TYPE: Thesis or dissertation; Map; Master's; Monographic ACCESSION NUMBER: 1981-016942 AUTHORS: Fashbaugh, Earl F COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Bear Lodge Mountain; Black Hills; Cenozoic; Crook County Wyoming;dikes; geologic maps; igneous rocks; intrusions; lava flows;lithostratigraphy; maps; mineral composition; nepheline syenite;Paleocene; Paleogene; petrology; plutonic rocks; quartz latite;rhyodacites; sills; stratigraphy; Sugarloaf Mountain; SundanceMountain; syenites; Tertiary; United States; volcanic rocks; Wyoming LANGUAGE: English PUBLICATION YEAR: 1979 UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 55) GEOREF: 1981-031199 COLLECTION AUTHORS: 13, Areal geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Geology of the SE1/4 Twin Peaks Quadrangle, Custer County, Idaho ORGANIZATION: University of Idaho, Moscow, ID, United States USA PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1981-031199 AUTHORS: Buffa, John Warren COLLECTION AUTHORS: 13, Areal geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Challis Volcanics Group; Corkscrew Mountain; Custer County Idaho;faults; Idaho; igneous rocks; Paleozoic; petrology; rhyolites;structural geology; Twin Peaks Quadrangle; Twin Peaks Unit; UnitedStates; volcanic rocks LANGUAGE: English

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PUBLICATION YEAR: 1976 UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 56) GEOREF: 1981-056899 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. FEATURES: References: 22; sketch map LATITUDE LONGITUDE: Latitude:N374500,N400000 Longitude:W1165000,W1193000 PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: U. S. Geol. Surv., United States USA ACCESSION NUMBER: 1981-056899 AUTHORS: Garside, Larry J; Bonham, Harold F, Jr; Ashley, Roger P; Silberman, Miles L; McKee, Edwin H COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Brougher Rhyolite; Churchill County Nevada; correlation; dates; Divide Andesite; Esmeralda County Nevada; fission tracks; Fraction Tuff; geochronology; hydrothermal alteration; igneous rocks; K/Ar; metasomatism; Mizpah Formation; Nevada; Nine Hill Tuff; Nye County Nevada; Oddie Rhyolite; programs; Siebert Formation; spectra; Tonopah Formation; United States; volcanic rocks; Washoe County Nevada ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology, Socorro, NM, United States USA PUBLICATION YEAR: 1981 SOURCE: Isochron/West, no.30, pp.11-19, Apr 1981 TITLE: Radiometric ages of volcanic and plutonic rocks and hydrothermal mineralization in Nevada; determinations run under the USGS-NBMG cooperative program UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 57) GEOREF: 1981-056900 CODEN: ISOWAC LATITUDE LONGITUDE: LAT| N405200; N412300; LONG: W1135500; W1141000. AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, CA, United States ACCESSION NUMBER: 1981-056900 AUTHORS: Hoggatt-Wendy-C; Miller-David-M BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Box-Elder-County-Utah; dates-; Elko-County-Nevada; geochronology-; igneous-rocks; intrusions-; K-Ar; metamorphism-; Nevada-;

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overprinting-; Pilot-Range; spectra-; Tooele-County-Utah; United-States; Utah- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 5; geol. sketch map. ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology. Socorro, NM, United States. 1981. PUBLICATION YEAR: 1981 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Isochron/West. 30, Pages 21-22. 1981. TITLE: K-Ar ages of intrusive rocks of the Pilot Range, Nevada and Utah. UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 58) GEOREF: 1982-003039 CODEN: JGEOAZ COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 36; illus. incl. 13 anals., 3 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N453000,N470000 Longitude:W1140000,W1150000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: West. Mich. Univ., United States USA ACCESSION NUMBER: 1982-003039 AUTHORS: Bickford, M E; Chase, R B; Nelson, B K; Shuster, R D; Arruda, E C COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; batholiths; Cenozoic; Cretaceous; dates; genesis;geochronology; gneisses; granites; Idaho; Idaho Batholith; IdahoCounty Idaho; igneous rocks; inclusions; intrusions; Mesozoic;metamorphic rocks; mineral inclusions; monazite; Montana;nesosilicates; orthosilicates; overgrowths; Paleogene; phosphates;plutonic rocks; Ravalli County Montana; silicates; Tertiary; U/Pb;United States; Upper Cretaceous; xenocrysts; xenoliths; zircon ISSN: 0022-1376 LANGUAGE: English PUBLICATION YEAR: 1981 SOURCE: Journal of Geology, vol.89, no.4, pp.433-457, Jul 1981 TITLE: U-Pb studies of zircon cores and overgrowths, and monazite;implications for age and petrogenesis of the northeastern IdahoBatholith UPDATE CODE: 1982 ---------------------------------------------------------------------------------------------------------- (Reference 59) GEOREF: 1982-017260 CODEN: BUGMAF LATITUDE LONGITUDE: LAT| N354500; N380000; LONG: W1173000; W1200000. AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, CA, United States ACCESSION NUMBER: 1982-017260

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AUTHORS: Dodge-Franklin-C-W; Moore-James-G BIB LEVEL: Analytic CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments COUNTRY OF PUBLICATION: United-States DESCRIPTORS: basalts-; California-; Cenozoic-; Central-California; data-; Fresno-County-California; geochemistry-; igneous-rocks; Inyo-County-California; Madera-County-California; major-elements; Mariposa-County-California; Mono-County-California; Neogene-; Quaternary-; Sierra-Nevada; Tertiary-; trace-elements; United-States; volcanic-rocks DOCUMENT TYPE: Serial ILLUSTRATION: Refs 60; illus. incl. 180 anals., 2 tables, sketch map. ISSN: 0016-7606 LANGUAGE: English SOURCE MEDIUM: print, microfiche PUBLISHER: Geological Society of America GSA. Boulder, CO, United States. 1981. PUBLICATION YEAR: 1981 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Geological Society of America Bulletin. 92; 12, Pages I 912-I 914, II 1670-II 1761. 1981. TITLE: Late Cenozoic volcanic rocks of the southern Sierra Nevada, California; II, Geochemistry. UPDATE CODE: 1982 ---------------------------------------------------------------------------------------------------------- (Reference 60) GEOREF: 1982-034005 CODEN: XGPPA9 COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: illus. incl. 62 anal. LATITUDE LONGITUDE: LAT: N350000; N402000; LONG: W1180000; W1210000. MONOGRAPH TITLE: Isotopic U-Pb ages of zircon from the granitoids of the central Sierra Nevada, California PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: Sixty-two samples from well-established comagmatic granitoid sequences and certain unassigned formations and plutons of the central part of the Sierra Nevada Batholith have been dated by the isotopic U-Pb method on zircon. The distribution of ages is consistent with the interpretation that, in this area, a belt of Cretaceous granitoids trending about N. 20 degrees W. crosses a belt of Jurassic granitoids trending about N. 40 degrees W.--from New Publications of the Geological Survey, Jan. 1982. ACCESSION NUMBER: 1982-034005 AUTHORS: Stern, T W; Bateman, P C; Morgan, B A; Newell, M F; Peck, D L BOOK AUTHORS: Stern-T-W; Bateman-P-C; Morgan-B-A; Newell-M-F; Peck-D-L BOOK TITLE: Isotopic U-Pb ages of zircon from the granitoids of the central Sierra Nevada, California. BIB LEVEL: Monograph CATEGORY CODES: 03-Geochronology COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age age batholiths California Cretaceous dates

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geochronology granites igneous rocks intrusions Jurassic Mesozoic nesosilicates orthosilicates plutonic rocks plutons Sierra Nevada Sierra Nevada Batholith silicates U/Pb United States USGS zircon DOCUMENT TYPE: Serial; Report ILLUSTRATION: illus. incl. 62 anal. ISSN: 1044-9612 LANGUAGE: English NOTES: Date Issued: 1982001982 OTHER DATES: 1982 PUBLISHER: U. S. Geological Survey, Reston, VA, United States USA PUBLICATION YEAR: 1981 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: P 1185 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: U. S. Geological Survey Professional Paper, Report: P 1185, 17 pp., 1981 TITLE: Isotopic U-Pb ages of zircon from the granitoids of the central Sierra Nevada, California UPDATE CODE: 1982 URL: (Availability) http://ngmsvr.wr.usgs.gov/Prodesc/proddesc_4748.htm ---------------------------------------------------------------------------------------------------------- (Reference 61) GEOREF: 1982-036712 CODEN: BUGMAF LATITUDE LONGITUDE: LAT AUTHOR AFFILIATION: Univ. Tex. at Austin, Dep. Geol. Sci., Austin, TX, United States ACCESSION NUMBER: 1982-036712 AUTHORS: Keller-Peter-C; Bockoven-Neil-T; McDowell-Fred-W BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkalic-composition; andesites-; ash-flow-tuff; basalts-; calc-alkalic-composition; Cenozoic-; Chihuahua-Mexico; dates-; evolution-; feldspar-group; framework-silicates; geochemistry-; igneous-rocks; K-Ar; lava-; major-elements; Mexico-; Paleogene-; petrology-; pyroclastics-; rhyolites-; Sierra-del-Gallego; Sierra-Madre-Occidental; silicates-; Tertiary-; volcanic-rocks; volcanism-; volcanology-; whole-rock DOCUMENT TYPE: Serial ILLUSTRATION: Refs ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America GSA. Boulder, CO, United States. 1982. PUBLICATION YEAR: 1982 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Geological Society of America Bulletin. 93; 4, Pages 303-314. 1982. . TITLE: Tertiary volcanic history of the Sierra del Gallego area, Chihuahua, Mexico. UPDATE CODE: 1982 ----------------------------------------------------------------------------------------------------------

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(Reference 62) GEOREF: 1982-037342 CODEN: GSAMAQ COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. BOOK EDITORS: Crittenden, Max D , Jr; Coney, Peter J; Davis, George H FEATURES: References: 17; 3 tables, geol. sketch maps MONOGRAPH TITLE: Cordilleran metamorphic core complexes PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: West. Environ. Geol., Menlo Park, CA, United States USA AUTHORS: Anderson, T H; Silver, L T; Salas, G A COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; dates; distribution; geochronology; intrusions; intrusive rocks; Mesozoic; Mexico; plutons; U/Pb ISSN: 0072-1069 LANGUAGE: English PUBLISHER: Geological Society of America GSA, Boulder, CO, United States USA PUBLICATION YEAR: 1980 SOURCE: Memoir - Geological Society of America, no.153, pp.269-283, 1980 TITLE: Distribution and U-Pb isotope ages of some lineated plutons, northwestern Mexico UPDATE CODE: 1982 ---------------------------------------------------------------------------------------------------------- (Reference 63) GEOREF: 1982-041385 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 11; sketch map LATITUDE LONGITUDE: Latitude:N453000,N454500 Longitude:W1124000,W1125500 PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: U. S. Geol. Surv., Denver, CO, United States USA ACCESSION NUMBER: 1982-041385 AUTHORS: Marvin, Richard F; Zen, E-An; Mehnert, Harald H COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; andesites; basalts; Cenozoic; dates; Eocene;geochronology; igneous rocks; K/Ar; lava flows; metarhyodacite;Montana; Oligocene; Paleogene; Pioneer Mountains; rhyodacites;rhyolites; southwestern Montana; Tertiary; trachyandesites; UnitedStates; volcanic rocks ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1982 SOURCE: Isochron/West, no.33, pp.11-13, Apr 1982 TITLE: Tertiary volcanics along the eastern flank of the Pioneer Mountains,southwestern Montana UPDATE CODE: 1982

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---------------------------------------------------------------------------------------------------------- (Reference 64) GEOREF: 1982-050991 COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 61; illus. incl. 82 anal., 5 tables, geol. sketch maps LATITUDE LONGITUDE: LAT: N360000; N370000; LONG: W1180000; W1193000. PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: Univ. Calif., Dep. Geol. Sci., Santa Barbara, CA, United States ACCESSION NUMBER: 1982-050991 AUTHORS: Chen-James-H; Moore-James-G BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; age-; batholiths-; California-; Central-California; dates-; Fresno-County-California; geochronology-; granites-; igneous-rocks; intrusions-; Inyo-County-California; isotopes-; lead-; Mesozoic-; metals-; nesosilicates-; orthosilicates-; plutonic-rocks; plutons-; ratios-; Sierra-Nevada-Batholith; silicates-; titanite-; Tulare-County-California; U-Pb; United-States; zircon- DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 61; illus. incl. 82 anal., 5 tables, geol. sketch maps. ISSN: 0196-6936 LANGUAGE: English PUBLISHER: American Geophysical Union. Washington, DC, United States. 1982. PUBLICATION YEAR: 1982 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: JGR. Journal of Geophysical Research. B. 87; 6, Pages 4761-4784. 1982. TITLE: Uranium-lead isotopic ages from the Sierra Nevada Batholith, California. UPDATE CODE: 1982 ---------------------------------------------------------------------------------------------------------- (Reference 65) GEOREF: 1982-067153 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Scale: 1|10,000. Type: geologic map FEATURES: illus. incl. strat. col., geol. sketch map LATITUDE LONGITUDE: Latitude:N440000,N440000 Longitude:W1040000,W1040000 MONOGRAPH TITLE: Petrology and alteration in the core of the Bear Lodge Tertiaryintrusive complex, Bear Lodge Mountains, Crook County, Wyoming ORGANIZATION: University of North Dakota, Grand Forks, ND, United States USA PAGES DATE: 127 pp. PUBLICATION TYPE: Thesis or dissertation; Map; Master's; Monographic ACCESSION NUMBER: 1982-067153

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AUTHORS: Wilkinson, Michael COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Bear Lodge Complex; Bear Lodge Mountains; Cenozoic; composition; CrookCounty Wyoming; domes; economic geology; geologic maps; Great Plains;igneous rocks; intrusions; maps; metal ores; North America; petrology;plutons; rare earth deposits; Tertiary; trachytes; United States;volcanic rocks; Warren Peaks; Wyoming LANGUAGE: English PUBLICATION YEAR: 1982 UPDATE CODE: 1982 ---------------------------------------------------------------------------------------------------------- (Reference 66) GEOREF: 1983-004021 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Scale: 1|10,000. Type: geologic map FEATURES: illus. incl. strat. col., sketch map LATITUDE LONGITUDE: Latitude:N440000,N440000 Longitude:W1040000,W1040000 MONOGRAPH TITLE: Petrology of the Cenozoic phonolites and related rocks of the Houstonarea, near Bear Lodge Mountains, Wyoming ORGANIZATION: University of North Dakota, Grand Forks, ND, United States USA PAGES DATE: 112 pp. PUBLICATION TYPE: Thesis or dissertation; Map; Master's; Monographic ACCESSION NUMBER: 1983-004021 AUTHORS: O'Toole, Frederick S COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Bear Lodge Mountains; Cenozoic; composition; Crook County Wyoming;emplacement; geologic maps; Great Plains; Houston Creek; igneousrocks; intrusions; maps; North America; petrology; phonolites; sills;temperature; United States; volcanic rocks; Wyoming LANGUAGE: English PUBLICATION YEAR: 1981 UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 67) GEOREF: 1983-004024 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Scale: 1|10,000. Type: geologic map FEATURES: illus. incl. 1 table LATITUDE LONGITUDE: Latitude:N440000,N440000 Longitude:W1040000,W1040000 MONOGRAPH TITLE: Petrology of the Cenozoic igneous rocks of the Lytle Creek area, BearLodge Mountains, Wyoming ORGANIZATION: University of North Dakota, Grand Forks, ND, United States USA PAGES DATE: 69 pp.

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PUBLICATION TYPE: Thesis or dissertation; Map; Master's; Monographic ACCESSION NUMBER: 1983-004024 AUTHORS: White, Stanley F COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Bear Lodge Mountains; Cenozoic; composition; Crook County Wyoming;geologic maps; Great Plains; igneous rocks; intrusions; laccoliths;Laramide Orogeny; Lytle Creek; maps; North America; petrology;pollution; porphyritic texture; porphyry; sills; textures;trachyte-phonolite family; United States; Wyoming LANGUAGE: English PUBLICATION YEAR: 1980 UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 68) GEOREF: 1983-019269 COLLECTION AUTHORS: 13, Areal geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. LATITUDE LONGITUDE: Latitude:N430000,N440000 Longitude:W1130000,W1150000 MONOGRAPH TITLE: Geology of the Deadwood-Sawmill Creek area, Custer County, Idaho ORGANIZATION: University of Idaho, Moscow, ID, United States (USA) PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1983-019269 AUTHORS: Albers, Doyle Francis COLLECTION AUTHORS: 13, Areal geology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: areal geology; Basin and Range Province; Bonanza Peak; calc-alkaliccomposition; Cenozoic; central Idaho; Challis Volcanics; composition;Cretaceous; Custer County Idaho; Deadwood Creek; dikes; Eocene; Idaho; Idaho Batholith; Mesozoic; Paleogene;Paleozoic; Phanerozoic; Sawmill Creek; Tertiary; volcanic rocks; West Fork; Yankee Fork mining district LANGUAGE: English PUBLICATION YEAR: 1981 UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 69) GEOREF: 1983-022392 CODEN: ISOWAC AUTHOR AFFILIATION: Los Alamos Natl. Lab., Earth and Space Sci. Div., Los Alamos, NM, United States ACCESSION NUMBER: 1983-022392 AUTHORS: Laughlin-A-W; Kress-V-C; Aldrich-M-J BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; basalts-; Big-Bend-National-Park; Brewster-County-

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Texas; Cenozoic-; chemical-composition; dates-; dikes-; geochronology-; igneous-rocks; intrusions-; K-Ar; Paleogene-; Tertiary-; Texas-; United-States; volcanic-rocks DOCUMENT TYPE: Serial ILLUSTRATION: Refs ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology. Socorro, NM, United States. 1982. PUBLICATION YEAR: 1982 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Isochron/West. 35; Pages 17-18. 1982. . TITLE: K-Ar ages of dike rocks, Big Bend National Park, Texas. UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 70) GEOREF: 1983-046158 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: sketch map PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Mont. State Univ., Dep. Earth Sci., Bozeman, MT, United States USA ACCESSION NUMBER: 1983-046158 AUTHORS: Harlan, Stephen S; Lageson, David R COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; amphibole group; asymmetric folds; Cenozoic; chainsilicates; clinoamphibole; Crazy Mountains Basin; dates; deformation;displacements; Eocene; faults; field studies; folds; geochronology;Helena Salient; hornblende; igneous rocks; intrusions; K/Ar; MeagherCounty Montana; Montana; Paleogene; silicates; sills; style; Tertiary;thrust faults; trachytes; United States; volcanic rocks ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1983 SOURCE: Isochron/West, vol.36, pp.7-8, Apr 1983 TITLE: Timing of deformation along the leading edge of the fold and thrustbelt, Crazy Mountains Basin, Montana UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 71) GEOREF: 1983-046219 LATITUDE LONGITUDE: LAT: N340000; N345000; LONG: W1144000; W1150000. AUTHOR AFFILIATION: U.S. Geol. Surv., Menlo Park, CA, United States ACCESSION NUMBER: 1983-046219

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AUTHORS: Howard-Keith-A; Stone-Paul; Pernokas-Martha-A; Marvin-Richard-F BOOK AUTHORS: Frost-Eric-G (editor); Martin-Donna-L (editor) BOOK TITLE: In: Mesozoic-Cenozoic tectonic evolution of the Colorado River region, California, Arizona, and Nevada. BIB LEVEL: Analytic CATEGORY CODES: 16-Structural-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; California-; Cenozoic-; Colorado-River-basin; dates-; decollement-; displacements-; faults-; igneous-rocks; K-Ar; Mojave-Desert; normal-faults; San-Bernardino-County-California; structural-geology; tectonics-; Tertiary-; Turtle-Mountains; United-States; volcanic-rocks; Whipple-Mountains-Fault DOCUMENT TYPE: Book ILLUSTRATION: Refs: 35; illus. incl. 3 tables, geol. sketch maps. LANGUAGE: English ANNOTATION: 20-18 m.y.. PUBLISHER: Cordilleran Publ.. San Diego, CA, United States. 1982. PUBLICATION YEAR: 1982 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Pages 341-354. 1982. TITLE: Geologic and geochronologic reconnaissance of the Turtle Mountains area, California; west border of the Whipple Mountains detachment terrane. UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 72) GEOREF: 1983-046233 LATITUDE LONGITUDE: LAT| N333500; N340500; LONG: W1143500; W1150000. AUTHOR AFFILIATION: San Diego State Univ., Dep. Geol. Sci., San Diego, CA, United States ACCESSION NUMBER: 1983-046233 AUTHORS: Martin-Donna-L; Krummenacher-Daniel; Frost-Eric-G BOOK AUTHORS: Frost-Eric-G editor; Martin-Donna-L editor BOOK TITLE: In: Mesozoic-Cenozoic tectonic evolution of the Colorado River region, California, Arizona, and Nevada. BIB LEVEL: Analytic CATEGORY CODES: 16-Structural-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Basin-and-Range-Province; Big-Maria-Mountains; California-; Cenozoic-; Colorado-River-basin; dates-; decollement-; genesis-; gneisses-; granites-; igneous-rocks; K-Ar; Little-Maria-Mountains; Mesozoic-; metamorphic-rocks; mylonitization-; North-America; pegmatite-; plutonic-rocks; Riverside-County-California; schists-; structural-geology; tectonics-; terrains-; Tertiary-; United-States DOCUMENT TYPE: Book ILLUSTRATION: Refs 47; illus. incl. 2 tables, sketch maps. LANGUAGE: English ANNOTATION: 64-38 m.y.. PUBLISHER: Cordilleran Publ.. San Diego, CA, United States. 1982. PUBLICATION YEAR: 1982 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Pages 518-549. 1982.

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TITLE: K/ Ar geochronologic record of Mesozoic and Tertiary tectonics of the Big Maria-Little Maria-Riverside mountains terrane. ---------------------------------------------------------------------------------------------------------- (Reference 73) GEOREF: 1983-048809 CODEN: SCIEAS COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 8 LATITUDE LONGITUDE: Latitude:N441000,N442500 Longitude:W1033500,W1034500 PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: U. S. Geol. Surv., United States USA ACCESSION NUMBER: 1983-048809 AUTHORS: Redden, Jack A; Obradovich, John D; Naeser, Charles W; Zartman, RobertE; Norton, James J COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; biotite; Black Hills; Cenozoic; dates; Deadwood;fission-track dating; geochronology; glasses; igneous rocks; K/Ar;Lawrence County South Dakota; mica group; nesosilicates;orthosilicates; Paleocene; Paleogene; pitchstone; sheet silicates;silicates; South Dakota; Tertiary; Tomahawk; United States; volcanicrocks; zircon ISSN: 0036-8075 LANGUAGE: English PUBLICATION YEAR: 1983 SOURCE: Science, vol.220, no.4602, pp.1153-1154, 10 Jun 1983 TITLE: Early Tertiary age of pitchstone in the northern Black Hills, SouthDakota UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 74) GEOREF: 1984-000388 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 55; 6 plates LATITUDE LONGITUDE: Latitude:N460000,N470000 Longitude:W1080000,W1090000 MONOGRAPH TITLE: Field relations, petrology, and mineralization of the Linster PeakDome, Fergus County, Montana ORGANIZATION: University of Montana, Missoula, MT, United States USA PAGES DATE: 115 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1984-000388 AUTHORS: Kirchner, Gail L COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkali syenite porphyry; alkali trachyte; calc-alkalic composition;Cenozoic; central Montana; composition; Cretaceous;

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dikes;emplacement; fault zones; Fergus County Montana; igneous processes;igneous rocks; intrusions; Judith Mountains; Linster Peak Dome; lowerTertiary; magmas; Mesozoic; mineralization; mixing; Montana;monzonites; petrology; plugs; plutonic rocks; stocks; syenites;Tertiary; United States LANGUAGE: English PUBLICATION YEAR: 1982 UPDATE CODE: 1984 ---------------------------------------------------------------------------------------------------------- (Reference 75) GEOREF: 1984-019557 CODEN: XGPPA9 COLLECTION AUTHORS: 24 Quaternary geology; 03 Geochronology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. FEATURES: References: 72; illus. incl. 9 tables, sketch map MONOGRAPH TITLE: Chemical analyses, correlations, and ages of upper Pliocene and Pleistocene ash layers of east-central and Southern California PAGES DATE: 40 pp. PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: Tephra layers volcanic ash and tuff beds of late Cenozoic age in east-central and southern California are identified and correlated by the chemical composition of volcanic glass, stratigraphic criteria, and petrographic characteristics. Among widespread tephra units identified are the Lava Creek ash bed 0.62 m.y., the Bishop ash bed 0.73 m.y., and the Huckleberry Ridge ash bed 2.01 m.y.. All three are identified for the first time in marine strata. Identification of these and other tephra units permits correlation of upper Cenozoic sedimentary strata deposited in marine, fluvial, and lacustrine environments and helps reconcile provincial marine and continental biostratigraphic chronologies. AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States ACCESSION NUMBER: 1984-019557 AUTHORS: Sarna-Wojcicki, Andrei M; Bowman, H R; Meyer, C E; Russell, P C; Woodward, M J; McCoy, Gail; Rowe, J J, Jr; Baedecker, P A; Asaro, Frank; Michael, Helen COLLECTION AUTHORS: 24 Quaternary geology; 03 Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Bishop Tuff; California; Cenozoic; Central California; chemical composition; correlation; geochemistry; geochronology; glasses; igneous rocks; Imperial County California; Inyo County California; Mono County California; Neogene; Pearlette Volcanic Ash; Pleistocene; Pliocene; pyroclastics; Quaternary; Riverside County California; San Bernardino County California; San Diego County California; Southern California; tephrochronology; Tertiary; United States; upper Pliocene; USGS; Ventura County California; volcanic ash; volcanic glass; volcanic rocks ISSN: 1044-9612 LANGUAGE: English PUBLISHER: U. S. Geological Survey, Reston, VA, United States USA PUBLICATION YEAR: 1984 RESEARCH PROGRAM: P 1293 SOURCE: U. S. Geological Survey Professional Paper, Report: P 1293, 40 pp., 1984 UPDATE CODE: 1984

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---------------------------------------------------------------------------------------------------------- (Reference 76) GEOREF: 1984-034182 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 20; sketch map PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: U. S. Geol. Surv., Denver, CO, United States USA ACCESSION NUMBER: 1984-034182 AUTHORS: Marvin, Richard F; Zen, E-An; Hammarstrom, Jane; Mehnert, Harald H COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; amphibole group; basalts; Beaverhead County Montana;biotite; Cenozoic; chain silicates; clinoamphibole; Cretaceous; dates;diorites; felsite; geochronology; granites; granodiorites; hornblende;igneous rocks; K/Ar; Mesozoic; mica group; Montana; northern PioneerBatholith; Paleocene; Paleogene; Pioneer Batholith; Pioneer Mountains;plutonic rocks; quartz diorites; rhyodacites; sheet silicates;silicates; southwestern Montana; Tertiary; tonalite; United States;volcanic rocks; whole rock ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1983 SOURCE: Isochron/West, vol.38, pp.11-16, Dec 1983 TITLE: Cretaceous and Paleocene potassium-argon mineral ages of the northernPioneer Batholith and nearby igneous rocks in Southwest Montana UPDATE CODE: 1984 ---------------------------------------------------------------------------------------------------------- (Reference 77) GEOREF: 1984-048453 CODEN: CJESAP LATITUDE LONGITUDE: LAT| N371000; N373000; LONG: W1075000; W1081000. SUMMARY LANGUAGE: French ABSTRACT: Epizonal Laramide pluton. The stock and associated mineralization evolved by a complex interaction of igneous and metasomatic processes as follows: stage 1, forceful emplacement of syenite plutons; stage 2, intense hydrothermal argillization of stage 1 syenites; stage 3, intrusion of mafic syenite plutons, some of which are layered, along shear zones; stage 4, violent escape of volatiles, producing intrusive breccia pipes; stage 5, intense K-metasomatic alteration of the older stock units with production of a fenitelike alteration halo extending 1000 m beyond the stock and simultaneous intrusion of carbonate-bearing alkali feldspar dikes; stage 6, emplacement of trachyte, syenite pegmatite, and mafic pegmatite dikes; stage 7, deposition of metallic minerals, sanidine, quartz, calcite, and fluorite as veinlets and disseminated replacement masses from hydrothermal solutions. The stock shows enrichment of volatiles CO sub 2 , F, and S, high concentrations of Ba and Sr, low

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concentrations of Rb, high concentrations of Cu, Ag, Au, Bi, Te, Pt, and Pd, with little or no enrichment in Nb, U, Y, and Zr.--Modified journal abstract. AUTHOR AFFILIATION: East. Wash. Univ., Cheney, WA, United States ACCESSION NUMBER: 1984-048453 AUTHORS: Werle-James-L; Ikramuddin-Mohammed; Mutschler-Felix-E BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: Canada DESCRIPTORS: alkalic-composition; Allard-Stock; breccia-pipes; chemical-composition; Colorado-; composition-; copper-ores; data-processing; dikes-; economic-geology; emplacement-; evolution-; geochemistry-; gold-ores; host-rocks; hydrothermal-alteration; hydrothermal-processes; igneous-processes; igneous-rocks; intrusions-; La-Plata-County-Colorado; La-Plata-Mountains; Laramide-Orogeny; major-elements; metal-ores; metasomatism-; mineral-composition; mineral-deposits,-genesis; pipes-; platinum-ores; plutonic-rocks; plutons-; polymetallic-ores; porphyry-copper; silver-ores; statistical-analysis; stocks-; syenites-; United-States DOCUMENT TYPE: Serial ILLUSTRATION: Refs 29; illus. incl. 2 tables, sketch maps. ISSN: 0008-4077 LANGUAGE: English PUBLISHER: National Research Council of Canada. Ottawa, ON, Canada. 1984. PUBLICATION YEAR: 1984 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Canadian Journal of Earth Sciences = Journal Canadien des Sciences de la Terre. 21; 6, Pages 630-641. 1984. TITLE: Allard Stock, La Plata Mountains, Colorado; an alkaline rock-hosted porphyry copper - precious metal deposit. UPDATE CODE: 1984 ---------------------------------------------------------------------------------------------------------- (Reference 78) GEOREF: 1984-052294 CODEN: CMPEAP COLLECTION AUTHORS: 02C, Geochemistry of rocks, soils, and sediments COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. FEATURES: References: 36; illus. incl. 3 tables PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors ABSTRACT: These rocks were derived from different levels of compositionally zoned magmatic systems. The 2 earliest rhyolites probably were tapped from short-lived silicic reservoirs, in contrast to the other 36 rhyolite domes and lava flows which the isotopic data suggest may have been leaked from the top of a single, long-lived magmatic system. Most Coso basalts show isotopic, geochemical, and mineralogic evidence of interaction with crustal rocks, but one analyzed flow has isotopic ratios that may represent mantle values super 87 Sr/ super 86 Sr = 0.7036, super 206 Pb/ super 204 Pb = 19.05, super 207 Pb/ super 204 Pb = 15.62, super 208 Pb/ super 204 Pb = 38.63. The initial isotopic composition of typical rhyolite super 87 Sr/ super 86 Sr = 0.7053, super 206 Pb/ super 204 Pb = 19.29, super 207 Pb/ super 204 Pb = 15.68, super 208 Pb/ super 204 Pb = 39.00 is representative of the middle or upper crust. Andesitic inclusions in the rhyolites are evidently samples of hybrid magmas from the silicic/mafic interface in vertically zoned magma reservoirs. Silicic endmember

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compositions inferred for these mixed magmas, however, are not those of erupted rhyolite but reflect the zonation within the silicic part of the magma reservoir. The compositional contrast at the interface between mafic and silicic parts of these systems apparently was greater for the earlier, smaller reservoirs.--Modified journal abstract. AUTHOR AFFILIATION: Geol. Surv. Japan, Japan JPN ACCESSION NUMBER: 1984-052294 AUTHORS: Bacon, Charles R; Kurasawa, Hajime; Delevaux, Maryse H; Kistler, Ronald W; Doe, Bruce R COLLECTION AUTHORS: 02C, Geochemistry of rocks, soils, and sediments COUNTRY OF PUBLICATION: International III DESCRIPTORS: alkaline earth metals; basalts; Basin and Range Province; California; Cenozoic; composition; Coso volcanic field; crust; differentiation; Garlock Fault; geochemistry; igneous rocks; inclusions; isotopes; lead; mafic composition; metals; North America; Owens Valley; Pb-207/Pb-204; Pb-208/Pb-204; Pleistocene; Quaternary; radioactive isotopes; ratios; rhyolites; siliceous composition; Sr-87/Sr-86; stable isotopes; strontium; tectonophysics; United States; volcanic rocks ISSN: 0010-7999 LANGUAGE: English PUBLISHER: Springer International, Heidelberg-New York, International III PUBLICATION YEAR: 1984 SOURCE: Contributions to Mineralogy and Petrology, vol.85, no.4, pp.366-375, Apr 1984 TITLE: Lead and strontium isotopic evidence for crustal interaction and compositional zonation in the source regions of Pleistocene basaltic and rhyolitic magmas of the Coso volcanic field, California UPDATE CODE: 1984 ---------------------------------------------------------------------------------------------------------- (Reference 79) GEOREF: 1985-023711 COLLECTION AUTHORS: 12 Stratigraphy; 16 Structural geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Bonnichsen, Bill; Breckenridge, Roy M FEATURES: References: 25; illus. incl. 4 tables, sketch map LATITUDE LONGITUDE: Latitude:N440000,N450000 Longitude:W1140000,W1150000 MONOGRAPH TITLE: Cenozoic geology of Idaho PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: Idaho Bur. Mines and Geol., Moscow, ID, United States USA ACCESSION NUMBER: 1985-023711 AUTHORS: McIntyre, D H; Ekren, E B; Hardyman, R F COLLECTION AUTHORS: 12 Stratigraphy; 16 Structural geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: ash-flow tuff; Cenozoic; Challis Quadrangle; Challis Volcanics;chemical composition; correlation; Custer Graben; faults; grabens;Idaho; igneous rocks; intrusions; lava; mafic composition;paleomagnetism; Panther Creek Graben; pumice; pyroclastics; reversals;stratigraphy; structural geology; tectonics; Tertiary; tuff; UnitedStates; Van Horn Peak; volcanic rocks; volcaniclastics; volcanism ISSN: 0073-442X LANGUAGE: English

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PUBLICATION YEAR: 1982 SOURCE: Bulletin - Idaho Bureau of Mines and Geology, vol.26, pp.3-22, 1982 TITLE: Stratigraphic and structural framework of the Challis Volcanics in theeastern half of the Challis 1 degrees X2 degrees Quadrangle, Idaho UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 80) GEOREF: 1985-023712 COLLECTION AUTHORS: 23 Geomorphology; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Bonnichsen, Bill; Breckenridge, Roy M FEATURES: References: 7; 2 tables, sketch maps MONOGRAPH TITLE: Cenozoic geology of Idaho PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: Idaho Bur. Mines and Geol., Moscow, ID, United States USA ACCESSION NUMBER: 1985-023712 AUTHORS: Leonard, B F; Marvin, R F COLLECTION AUTHORS: 23 Geomorphology; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; calderas; Casto Pluton; Cenozoic; central Idaho; ChallisVolcanics; dates; emplacement; evolution; geomorphology; Idaho;igneous rocks; intrusions; K/Ar; lava; plutons; stocks; subsidence;Tertiary; Thunder Mountain Caldera; United States; volcanic features;volcanic rocks ISSN: 0073-442X LANGUAGE: English PUBLICATION YEAR: 1982 SOURCE: Bulletin - Idaho Bureau of Mines and Geology, vol.26, pp.23-41, 1982 TITLE: Temporal evolution of the Thunder Mountain Caldera and relatedfeatures, central Idaho UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 81) GEOREF: 1985-023713 COLLECTION AUTHORS: 12 Stratigraphy; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Bonnichsen, Bill; Breckenridge, Roy M FEATURES: References: 16; 1 table, sketch map MONOGRAPH TITLE: Cenozoic geology of Idaho PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Idaho Bur. Mines and Geol., Moscow, ID, United States USA ACCESSION NUMBER: 1985-023713 AUTHORS: Jones, Robert W COLLECTION AUTHORS: 12 Stratigraphy; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: andesites; Cenozoic; chemical composition; Columbia River BasaltGroup; dikes; Idaho; Idaho Batholith; Idaho County Idaho; igneousrocks;

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intrusions; Kamiah Buttes; Kamiah Volcanics; latite; lavaflows; lower Tertiary; mineral composition; Miocene; Neogene;north-central Idaho; Palouse Formation; stratigraphy; Tertiary; thinsections; trachyandesites; unconformities; United States; volcanicrocks ISSN: 0073-442X LANGUAGE: English PUBLICATION YEAR: 1982 SOURCE: Bulletin - Idaho Bureau of Mines and Geology, vol.26, pp.43-52, 1982 TITLE: Early Tertiary-age Kamiah Volcanics, north-central Idaho UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 82) GEOREF: 1985-023727 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 12 Stratigraphy COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Bonnichsen, Bill; Breckenridge, Roy M FEATURES: References: 16; illus. incl. 1 table, sketch map MONOGRAPH TITLE: Cenozoic geology of Idaho PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Idaho Bur. Mines and Geol., Moscow, ID, United States USA ACCESSION NUMBER: 1985-023727 AUTHORS: Bernt, John; Bonnichsen, Bill COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 12 Stratigraphy COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Alder Creek Tuff; Bieroth Volcanics; Browns Basin; Cedar Canyon Tuff;Cenozoic; chemical composition; Cougar Point Tuff; Eocene; Idaho;igneous rocks; major elements; mineral composition; minor elements;Miocene; Neogene; Nevada; northern Nevada; Owyhee County Idaho;Paleogene; petrography; petrology; phenocrysts; Snake River plain;southern Idaho; stratigraphy; Tertiary; unconformities; United States;volcanic features; volcanic necks; volcanic rocks; X-ray data ISSN: 0073-442X LANGUAGE: English PUBLICATION YEAR: 1982 SOURCE: Bulletin - Idaho Bureau of Mines and Geology, vol.26, pp.321-330,1982 TITLE: Pre-Cougar Point Tuff volcanic rocks near the Idaho-Nevada border,Owyhee County, Idaho UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 83) GEOREF: 1988-066396 CODEN: ECGLAL AUTHOR AFFILIATION: ASARCO, Reno, NV, United States ACCESSION NUMBER: 1988-066396 AUTHORS: Vikre-Peter-G; McKee-Edwin-H; Silberman-Miles-L BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits; 03-Geochronology

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COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Ar-Ar; chemical-composition; dates-; economic-geology; gold-ores; hydrothermal-alteration; hydrothermal-processes; igneous-processes; K-Ar; Lyon-County-Nevada; metal-ores; metasomatism-; mineral-deposits,-genesis; minerals-; Nevada-; silver-ores; Storey-County-Nevada; United-States; Virginia-Range; Washoe-County-Nevada DOCUMENT TYPE: Serial ILLUSTRATION: Refs 19; illus. incl. 3 tables, sect., geol. sketch maps. ISSN: 0361-0128 LANGUAGE: English PUBLISHER: Economic Geology Publishing Company. Lancaster, PA, United States. 1988. PUBLICATION YEAR: 1988 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists. 83; 4, Pages 864-874. 1988. TITLE: Chronology of Miocene hydrothermal and igneous events in the western Virginia Range, Washoe, Storey, and Lyon counties, Nevada. UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 84) GEOREF: 1993-021525 CODEN: CMPEAP COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. Referenceincludes data from Geoline, Bundesanstalt fur Geowissenschaften undRohstoffe, Hanover, Germany FEATURES: References: 2 p.; illus. incl. 1 table, geol. sketch maps PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Carleton College, Geol. Dep., Northfield, MN, United States (USA) ACCESSION NUMBER: 1993-021525 AUTHORS: Manduca, Cathryn A; Silver, Leon T; Taylor, Hugh P COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: International (III) DESCRIPTORS: alkaline earth metals; chemical ratios; deformation; genesis; graniticcomposition; Idaho; interfaces; intrusions; isotopes; lithosphere;magmas; metals; mixing; mobility; O-18/O-16; oxygen; plutons;Sr-87/Sr-86; stable isotopes; strontium; United States; western Idaho;Western U.S. ISSN: 0010-7999 LANGUAGE: English PUBLICATION YEAR: 1992 SOURCE: Contributions to Mineralogy and Petrology, vol.109, no.3, pp.355-372,1992 TITLE: (super 87) Sr/ (super 86) Sr and (super 18) O/ (super 16) O isotopicsystematics and geochemistry of granitoid plutons across asteeply-dipping boundary between contrasting lithospheric blocks inwestern Idaho UPDATE CODE: 1993

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---------------------------------------------------------------------------------------------------------- (Reference 85) GEOREF: 1998-059325 COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: illus. MONOGRAPH TITLE: Pb isotope systematics in Cenozoic igneous rocks from the Rio Grande Rift region, USA ORGANIZATION: McMaster University, Hamilton, ON, Canada CAN PAGES DATE: 178 pp. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic ACCESSION NUMBER: 1998-059325 AUTHORS: Heikoop, Cherylyn E COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: Canada CAN LANGUAGE: English PUBLICATION YEAR: 1997 UPDATE CODE: 199821 ---------------------------------------------------------------------------------------------------------- (Reference 86) GEOREF: 1994-048848 CODEN: GCACAK AUTHOR AFFILIATION: Lamont-Doherty Earth Observatory, Palisades, NY, United States ACCESSION NUMBER: 1994-048848 AUTHORS: Marcantonio-Franco; Reisberg-Laurie; Zindler-Alan; Wyman-Derek; Hulbert-Larry BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits; 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: International DESCRIPTORS: alkali-metals; alkaline-earth-metals; Canada-; copper-; copper-ores; isotope-ratios; isotopes-; mafic-composition; metal-ores; metals-; Nd-144-Nd-143; neodymium-; nickel-; nickel-ores; O-18-O-16; Os-188-Os-187; osmium-; oxygen-; platinum-group; platinum-ores; Quill-Creek-Complex; radioactive-isotopes; rare-earths; Rb-87-Sr-86; Re-187-Os-186; rhenium-; rubidium-; samarium-; Sm-147-Nd-144; stable-isotopes; strontium-; ultramafic-composition; Wellgreen-Intrusion; Western-Canada; Wrangellia-; Yukon-Territory DOCUMENT TYPE: Serial ILLUSTRATION: Refs 59; illus. incl. 3 tables, geol. sketch map. ISSN: 0016-7037 LANGUAGE: English PUBLISHER: Pergamon. Oxford, International. 1994. PUBLICATION YEAR: 1994 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Geochimica et Cosmochimica Acta. 58; 2, Pages 1007-1017. 1994.

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TITLE: An isotopic study of the Ni-Cu-PGE-rich Wellgreen Intrusion of the Wrangellia Terrane; evidence for hydrothermal mobilization of rhenium and osmium. UPDATE CODE: 199422 ---------------------------------------------------------------------------------------------------------- (Reference 87) GEOREF: 1991-030772 CODEN: XDIGAS COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 15; illus. incl. 300 anal., 5 tables, geol. sketch map PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: The Marion Peak 15-minute Quadrangle 36 degrees 45'-37 degrees 00' north latitude 118 degrees 30'-45' west longitude is underlain over 95 percent of its area by granitic rocks. This report documents major element chemical analyses of 30 samples and modal mineral analyses of 178 samples of granitic rocks. Specific gravity and magnetic susceptibility analyses are also included. The estimated average granitic rock in the quadrangle contains 69.2 weight percent SiO sub 2 . AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States AUTHORS: Moore, James G COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: batholiths California Central California chemical composition composition Fresno County California geochemistry granites granodiorites igneous rocks intrusions major elements Marion Peak Quadrangle metamorphic rocks metavolcanic rocks mineral composition modal analysis plutonic rocks regression analysis Sierra Nevada specific gravity statistical analysis trace elements United States USGS volcanic rocks ISSN: 8755-531X LANGUAGE: English SOURCE: U. S. Geological Survey Bulletin, Report: B 1986, 23 pp., 1991 TITLE: Marion Peak Quadrangle, Fresno County, California; analytic data ---------------------------------------------------------------------------------------------------------- (Reference 88) GEOREF: 1991-040862 CODEN: GSAMAQ AUTHOR AFFILIATION: Mass. Inst. Technol., Dep. Earth, Atmos. and Planet. Sci., Cambridge, MA, United States ACCESSION NUMBER: 1991-040862 AUTHORS: Spencer, Jon E. BOOK AUTHORS: Wernicke-Brian-P editor BOOK TITLE: In: Basin and Range extensional tectonics near the latitude of Las Vegas, Nevada.

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BIB LEVEL: Analytic CATEGORY CODES: 16-Structural-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Arrastre-Spring-Fault; Avawatz-Formation; Avawatz-Mountains; Basin-and-Range-Province; California-; Cenozoic-; clastic-rocks; compression-; conglomerate-; crustal-shortening; Death-Valley-Fault; displacements-; evolution-; extension-tectonics; faults-; folds-; Garlock-Fault; high-angle-faults; K-Ar; low-angle-faults; Mojave-Desert; Mule-Spring-Fault; neotectonics-; normal-faults; North-America; Old-Mormon-Spring-Fault; reverse-faults; San-Bernardino-County-California; sedimentary-rocks; Sheep-Creek; southeastern-California; structural-geology; tectonics-; terranes-; thickness-; tilt-; United-States; uplifts-; upper-Cenozoic DOCUMENT TYPE: Serial ISBN: 0-8137-1176-2 ILLUSTRATION: Refs 29; illus. incl. 2 tables, geol. sketch maps. ISSN: 0072-1069 LANGUAGE: English PUBLISHER: Geological Society of America GSA. Boulder, CO, United States. 1990. PUBLICATION YEAR: 1990 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Memoir - Geological Society of America. 176; Pages 317-333. 1990. TITLE: Late Cenozoic extensional and compressional tectonism in the southern and western Avawatz Mountains, southeastern California. ---------------------------------------------------------------------------------------------------------- (Reference 89) GEOREF: 2006-021428 CODEN: #06490 LATITUDE LONGITUDE: LAT: N420000; N480000; LONG: W1210000; W1240000. ABSTRACT: The importance of the Cascade Range magmatic arc in understanding the geologic evolution of western North America is widely recognized, and these arc rocks have been extensively studied. The geochemical database presented here represents the first phase of an effort to synthesize and interpret the geochemistry of Western Cascades volcanic arc rocks. Using the large and synoptic body of information in the present database, it is possible to characterize the primary geochemical attributes of the Western Cascades rocks and begin interpretation of their petrologic, tectonic, and metallogenic significance. ACCESSION NUMBER: 2006-021428 AVAILABILITY: U. S. Geol. Surv., Denver, CO, United States BOOK AUTHORS: du-Bray-Edward-A; John-David-A; Sherrod-David-R; Evarts-Russell-C; Conrey-Richard-M; Lexa-Jaroslav BOOK AUTHOR AFFILIATION: U. S. Geological Survey, USA, United States BOOK TITLE: Geochemical database for volcanic rocks of the western Cascades, Washington, Oregon, and California. BIB LEVEL: Monograph CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments COUNTRY OF PUBLICATION: United-States DESCRIPTORS: applications-; bedrock-; California-; Cascade-Range; chemical-composition; data-bases; data-processing; geochemistry-; igneous-rocks; Oregon-; United-States; USGS-; volcanic-rocks; Washington-; western-Cascade-Range DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs: 121; 1 table, geol. sketch map.

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LANGUAGE: English PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 49. 2006. PUBLICATION YEAR: 2006 REFERENCE SOURCE: GeoRef, Copyright 2006, American Geological Institute. REPORT NUMBER: DS-0155 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: U. S. Geological Survey Data Series. 2006. UPDATE CODE: 200606 URL: (Full text) http://pubs.usgs.gov/ds/2006/155/ ---------------------------------------------------------------------------------------------------------- (Reference 90) GEOREF: 1996-059971 CODEN: #00282 LATITUDE LONGITUDE: LAT: N423730; N424500; LONG: W1225230; W1230000. MAP TYPE: geologic-maps ACCESSION NUMBER: 1996-059971 BOOK AUTHORS: Wiley-Thomas-J BOOK AUTHOR AFFILIATION: Oregon Department of Geology and Mineral Industries, Portlnd, OR, United States BOOK TITLE: Geology and mineral resources map of the Cleveland Ridge Quadrangle, Jackson County, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 14-Geologic-maps COUNTRY OF PUBLICATION: United-States DESCRIPTORS: chemically-precipitated-rocks; chert-; chlorite-; chlorite-group; Cleveland-Ridge-Quadrangle; economic-geology-maps; epidote-; epidote-group; explanatory-text; geologic-maps; Jackson-County-Oregon; jasperoid-; maps-; mineral-exploration; mineral-resources; mineralization-; Oregon-; orthosilicates-; quartz-veins; sedimentary-rocks; sheet-silicates; silicates-; sorosilicates-; sulfides-; United-States; veins- DOCUMENT TYPE: Map; Serial; Report ILLUSTRATION: Refs: 27; illus. incl. 3 tables, sect. ISSN: 0270-952X LANGUAGE: English MAP TYPE: geologic-maps MAP SCALE: 1:24,000 PUBLISHER: Oregon Department of Geology and Mineral Industries. Portland, OR, United States. Pages: 5. 1993. PUBLICATION YEAR: 1993 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: GMS-73 SOURCE: Geological Map Series (Portland). 1993. UPDATE CODE: 199619 ---------------------------------------------------------------------------------------------------------- (Reference 91) GEOREF: 2004-069376 CODEN: #06453

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LATITUDE LONGITUDE: LAT: N455230; N460000; LONG: W1223000; W1223730. MAP TYPE: color-geologic-maps ACCESSION NUMBER: 2004-069376 BOOK AUTHORS: Evarts-Russell-C BOOK AUTHOR AFFILIATION: U. S. Geological Survey, USA, United States BOOK TITLE: Geologic map of the Ariel Quadrangle, Clark and Cowlitz Counties, Washington. BIB LEVEL: Monograph CATEGORY CODES: 14-Geologic-maps COUNTRY OF PUBLICATION: United-States DESCRIPTORS: areal-geology; Ariel-Quadrangle; Clark-County-Washington; Cowlitz-County-Washington; geologic-maps; landforms-; lithostratigraphy-; maps-; mass-movements; mineral-resources; petrology-; surficial-geology; tectonic-elements; United-States; USGS-; Washington- DOCUMENT TYPE: Map; Serial; Report ILLUSTRATION: Refs: 118; illus. incl. 2 tables. LANGUAGE: English MAP TYPE: color-geologic-maps MAP SCALE: 1:24,000 PUBLISHER: U. S. Geological Survey, United States. Pages: 35, 1 sheet. 2004. PUBLICATION YEAR: 2004 REFERENCE SOURCE: GeoRef, Copyright 2004, American Geological Institute. REPORT NUMBER: SIM-2826 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: Scientific Investigations Map. 2004. UPDATE CODE: 200420 URL: (Full text) http://pubs.usgs.gov/sim/2004/2826/ ---------------------------------------------------------------------------------------------------------- (Reference 92) GEOREF: 1988-001166 CODEN: _NULL_ COLLECTION AUTHORS: 03 Geochronology; 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 48; illus. incl. 4 tables, geol. sketch map PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors ABSTRACT: _NULL_ AUTHOR AFFILIATION: Calif. Inst. Technol., Div. Geol. and Planet. Sci., Pasadena, CA, United States USA AUTHORS: Saleeby, Jason B; Sams, David B; Kistler, Ronald W COLLECTION AUTHORS: 03 Geochronology; 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: USA DESCRIPTORS: absolute age alkaline earth metals batholiths California Cretaceous dates geochemistry geochronology gneisses granites granodiorites igneous rocks intrusions intrusive rocks isotopes Kern County California Mesozoic metals metamorphic rocks metasedimentary rocks nesosilicates O-18/O-16 orthosilicates oxygen plutonic rocks protoliths Sierra Nevada Sierra Nevada Batholith silicates Southern California Sr-87/Sr-86 stable isotopes strontium Tehachapi Mountains U/Pb United States zircon

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ISSN: 0885-3401 LANGUAGE: English PUBLISHER: _NULL_ PUBLICATION YEAR: 1987 SOURCE: Journal of Geophysical Research, B, Solid Earth and Planets, vol.92, no.10, pp.10,443-10,466, 10 Sep 1987 TITLE: U/Pb zircon, strontium, and oxygen isotopic and geochronological study of the southernmost Sierra Nevada Batholith, California UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 93) GEOREF: 1988-009326 CODEN: CMPEAP AUTHOR AFFILIATION: Univ. Wash., Dep. Geol. Sci., Seattle, WA 98195, United States ACCESSION NUMBER: 1988-009326 AUTHORS: Kelemen-P-B; Ghiorso-M-S BIB LEVEL: Analytic CATEGORY CODES: CC: 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: International DESCRIPTORS: assimilation-; Big-Jim-Complex; calc-alkalic-composition; Cascade-Range; chemical-composition; Chiwaukum-Mountains; composition-; contact-metamorphism; differentiation-; fractional-crystallization; igneous-rocks; inclusions-; intrusions-; magmas-; metamorphism-; peridotites-; petrography-; petrology-; plutonic-rocks; plutons-; ultramafics-; United-States; Washington-; xenoliths- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 83; illus. incl. 6 tables, geol. sketch maps. ISSN: 0010-7999 LANGUAGE: English PUBLISHER: Springer International. Heidelberg-New York, International. 1986. REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe, Hanover, Germany SOURCE: Contributions to Mineralogy and Petrology. 94; 1, Pages 12-28. 1986. TITLE: Assimilation of peridotite in zoned calc-alkaline plutonic complex; evidence from the Big Jim Complex, Washington Cascades. UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 94) GEOREF: 1983-052544 CODEN: XGPPA9 COLLECTION AUTHORS: 27A, Economic geology, geology of ore deposits COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Scale: 1|24,000 ; 1|20,000. Type: colored geologic map ; geochemical maps FEATURES: Features References: 62; illus. incl. 341 anal., 8 tables, sects.,

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geol. sketch map LATITUDE LONGITUDE: Latitude:N442000,N444000 Longitude:W1042000,W1043500 MONOGRAPH TITLE: Geology and description of thorium and rare-earth deposits in the southern Bear Lodge Mountains, northeastern Wyoming PUBLICATION TYPE: Serial; Report; Map; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: Thorium and rare-earth disseminated deposits occur in altered trachyte and phonolite intrusives that form the center of the Bear Lodge Dome. Several areas totaling 3.2 km super 2 contain at least 2,000 ppm total rare earths, and 1.7 km super 2 of this area contain at least 200 ppm thorium. In addition, 26 rare-earth and thorium veins are also found. These mineral deposits are related to doming of Paleozoic and Mesozoic sedimentary rocks by alkalic intrusives of Tertiary age.--from New Publications of the Geological Survey, April 1983. AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States ACCESSION NUMBER: 1983-052544 AUTHORS: Staatz, M H COLLECTION AUTHORS: 27A, Economic geology, geology of ore deposits COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Bear Lodge Mountains; Cenozoic; Crook County Wyoming; disseminated deposits; domes; economic geology; geochemical maps; geochemical methods; geochemistry; geologic maps; geophysical methods; geophysical surveys; grade; igneous rocks; intrusive rocks; maps; Mesozoic; metaigneous rocks; metal ores; metamorphic rocks; mineral exploration; Paleozoic; phonolites; programs; radioactivity methods; rare earth deposits; resources; stratigraphic units; surveys; Tertiary; thorium ores; trachytes; United States; USGS; veins; volcanic rocks; Wyoming ISSN: 1044-9612 LANGUAGE: Language English NOTES: Notes Geology and resources of thorium in the United States PUBLICATION YEAR: 1983 RESEARCH PROGRAM: P 1049-D SOURCE: U. S. Geological Survey Professional Paper, Report: P 1049-D, D1-D52 pp., 1983 UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 95) GEOREF: 1986-034068 CODEN: XDIGAS COLLECTION AUTHORS: 27A, Economic geology, geology of ore deposits COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: McIntyre, D. H. FEATURES: References: 5; illus. incl. 1 table, geol. sketch map LATITUDE LONGITUDE: Latitude:N440000,N450000 Longitude:W1140000,W1160000 MONOGRAPH TITLE: Symposium on the Geology and mineral deposits of the Challis 1 degreesX2 degrees Quadrangle, Idaho PUBLICATION TYPE: Serial; Report; Conference document; Analytic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States ACCESSION NUMBER: 1986-034068 AUTHORS: Hardyman, R F; Fisher, Frederick S COLLECTION AUTHORS: 27A, Economic geology, geology of ore deposits

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CONFERENCE INFORMATION: Northwest Mining Association Convention ; symposium on the Geology andmineral deposits of the Challis 1 degrees X2 degrees Quadrangle,Spokane, WA, United States, Dec. 1-2, 1983 COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Boise County Idaho; Cenozoic; central Idaho; Challis Quadrangle;Challis Volcanics; CUSMAP; Custer County Idaho; economic geology;epithermal processes; Idaho; igneous rocks; intrusions; intrusiverocks; Lemhi County Idaho; metal ores; mineral deposits, genesis;rhyolites; Tertiary; textures; United States; USGS; Valley CountyIdaho; volcanic fields; volcanic rocks; volcanism; volcanology ISSN: 8755-531X LANGUAGE: English PUBLICATION YEAR: 1985 RESEARCH PROGRAM: B 1658 A-S SOURCE: U. S. Geological Survey Bulletin, Report: B 1658 A-S, pp.167-179,1985 TITLE: Rhyolite intrusions and associated mineral deposits in the Challisvolcanic field, Challis Quadrangle UPDATE CODE: 1986 ---------------------------------------------------------------------------------------------------------- (Reference 96) GEOREF: 1989-040865 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Geology of the Tertiary igneous rocks in the Richmond Hill intrusivecomplex, northern Black Hills, South Dakota ORGANIZATION: South Dakota School of Mines &amp; Technology, Rapid City, SD, UnitedStates USA PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1989-040865 AUTHORS: Parkhill, Thomas A COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Black Hills; Cenozoic; igneous rocks; petrology; Richmond HillComplex; South Dakota; stratigraphy; Tertiary; United States LANGUAGE: English PUBLICATION YEAR: 1976 UPDATE CODE: 1989 ---------------------------------------------------------------------------------------------------------- (Reference 97) GEOREF: 2004-020759 CODEN: XGROAG COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Medium: WWW MONOGRAPH TITLE: Intrusive rock database for the digital geologic map of Utah PUBLICATION TYPE: Serial; Report; Monographic RESOURCE LOCATION: http://geopubs.wr.usgs.gov/open-file/of03-486/

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SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geological Survey, Denver, CO, United States USA ACCESSION NUMBER: 2004-020759 AUTHORS: Nutt, C J; Ludington, Steve COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: data bases; data processing; digital data; geographic information systems; igneous rocks; information systems; intrusions; mapping; plutonic rocks; spatial data; United States; USGS; Utah ISSN: 0196-1497 LANGUAGE: English NOTES: Accessed on Feb. 9, 2004 PUBLICATION YEAR: 2003 RESEARCH PROGRAM: OF 03-0486 SOURCE: Open-File Report - U. S. Geological Survey, Report: OF 03-0486, 41 pp., 2003 UPDATE CODE: 200406 ---------------------------------------------------------------------------------------------------------- (Reference 98) GEOREF: 2005-900114 (unpublished Georef; Navdat only) COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2005, American Geological Institute. PUBLICATION TYPE: Serial; Report; Analytic AUTHOR AFFILIATION: University of British Columbia, Vancouver, BC, Canada ACCESSION NUMBER: 2005-000014 AUTHORS: Russell, Charles W.; Gabites, Janet COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: Idaho; Idaho batholith; Atlanta Lobe; strontium; europium; mafic intrusions; synplutonic; Banks, Idaho; Cordillera; batholith; fractional crystallization; assimilation; petrogenesis; contamination; lower crust; gabbro; diorite; dikes LANGUAGE: English PUBLICATION YEAR: 2005 SOURCE: Idaho Geological Survey, Technical Report 05-1 TITLE: Elevated 87Sr/86Sr ratios from mafic intrusions in the Atlanta Lobe of the Idaho Batholith ---------------------------------------------------------------------------------------------------------- (Reference 99) GEOREF: 2003-057105 CODEN: CJESAP COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2003, American Geological Institute. FEATURES: References: 50; illus. incl. 3 tables, geol. sketch maps LATITUDE LONGITUDE: Latitude:N290000,N293000 Longitude:W1120000,W1123000 PUBLICATION TYPE: Serial; Analytic

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SUMMARY LANGUAGE: French ABSTRACT: New major- and trace-element and radiogenic Sr and Nd data from granitic rocks help to characterize the geochemical composition of the Coastal Sonora batholith, which represents the westernmost portion of the Laramide Magmatic arc approximately 80-40 Ma in Mexico. Compared with more inland-located regions of the arc in central and eastern Sonora Inner Granites, the plutons within the coastal batholith have higher MgO, FeO, and CaO and lower K sub 2 O contents, and tend to be more depleted in Nb, U, and to a lesser extent Rb, but relatively enriched in Sr. These rocks display flatter slopes of rare-earth elements, with La abundances around 80 to 200 times chondrite values and smaller but well-developed negative Eu anomalies. Initial super 87 Sr/ super 86 Sr ratios and epsilon Nd values from a few studied samples of the Coastal Sonora batholith range from 0.70586 to 0.70679 and from -2.3 to -4.7, respectively. These isotopic signatures allow recognition of a more mantle-related magma source for this batholith as compared with the Inner Granites, which have higher Sr and lower Nd ratios. In a more regional context, the compositions of the Coastal Sonora batholith rocks resemble those of the eastern portion of the Peninsular Ranges batholith to the northwest. Based on our observations, we propose that partial melting of a crust thickened by overlapping periods of Jurassic through Cretaceous arc magmatism along the southwestern edge of the North American continent may account for the geochemical and isotopic characteristics displayed by the Coastal Sonora batholith granitic rocks. AUTHOR AFFILIATION: University of Arizona, United States USA; Universidad de Sonora, Mexico MEX AUTHORS: Valencia-Moreno, M; Ruiz, J; Ochoa-Landin, L; Martinez-Serrano, R; Vargas-Navarro, P COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: Canada CAN DESCRIPTORS: alkaline earth metals; Coastal Sonora Batholith; geochemistry; granites; igneous rocks; isotope ratios; isotopes; major elements; metals; Mexico; neodymium; North America; northwestern Mexico; Peninsular Ranges Batholith; plutonic rocks; radioactive isotopes; rare earths; samarium; Sm-147/Nd-144; Sonora Mexico; Sr-87/Sr-86; stable isotopes; strontium; trace elements ISSN: 0008-4077 LANGUAGE: English PUBLISHER: National Research Council of Canada, Ottawa, ON, Canada CAN PUBLICATION YEAR: 2003 SOURCE: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre, vol.40, no.6, pp.819-831, Jun 2003 TITLE: Geochemistry of the Coastal Sonora Batholith, northwestern Mexico UPDATE CODE: 200318 ---------------------------------------------------------------------------------------------------------- (Reference 100) GEOREF: 1982-064591 COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 51; illus. incl. 36 anal., 3 tables, sketch maps LATITUDE LONGITUDE: Latitude:N431000,N451500 Longitude:W1145000,W1161000 PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors

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AUTHOR AFFILIATION: Calif. Inst. Technol., United States (USA) ACCESSION NUMBER: 1982-064591 AUTHORS: Criss, R E; Lanphere, M A; Taylor, H P, Jr COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: absolute age; age; apparent age; batholiths; biotite; Cenozoic; D/H;dates; deuterium; Eocene; geochronology; heating; hydrogen;hydrothermal alteration; Idaho; igneous rocks; intrusions; isotopes;materials; Mesozoic; metasomatism; mica group; O-18/O-16;overprinting; oxygen; Paleogene; plutonic rocks; plutons; sheetsilicates; silicates; stable isotopes; Tertiary; thermal effects;United States ISSN: 0196-6936 LANGUAGE: English NOTES: Calif. Inst. Technol., Div. Geol. and Planet. Sci.; Contrib. No.3608] PUBLICATION YEAR: 1982 SOURCE: JGR. Journal of Geophysical Research. B, vol.87, no.8, pp.7029-7046,10 Aug 1982 TITLE: Effects of regional uplift, deformation, and meteoric-hydrothermalmetamorphism on K-Ar ages of biotites in the southern half of theIdaho Batholith UPDATE CODE: 1982 ---------------------------------------------------------------------------------------------------------- (Reference 101) GEOREF: 1989-022045 CODEN: TCTOAM COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 34; illus. incl. 1 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N433000,N453000 Longitude:W1144500,W1161500 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: South. Methodist Univ., Dallas, TX, United States (USA) ACCESSION NUMBER: 1989-022045 AUTHORS: Sweetkind, Donald S; Blackwell, David D COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: Netherlands (NLD) DESCRIPTORS: apatite; batholiths; Boise County Idaho; Cenozoic; cooling;emplacement; fission-track dating; geochronology; geologicthermometry; hydrothermal conditions; Idaho; Idaho Batholith; IdahoCounty Idaho; intrusions; nesosilicates; orthosilicates; phosphates;plutons; silicates; thermal history; United States; Valley CountyIdaho; west-central Idaho; zircon ISSN: 0040-1951 LANGUAGE: English PUBLICATION YEAR: 1989 SOURCE: Tectonophysics, vol.157, no.4, pp.241-250, 01 Feb 1989 TITLE: Fission-track evidence of the Cenozoic thermal history of the IdahoBatholith UPDATE CODE: 1989 ----------------------------------------------------------------------------------------------------------

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(Reference 102) GEOREF: 1986-034057 CODEN: XDIGAS COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: McIntyre, D. H. FEATURES: References: 24; illus. incl. 2 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N440000,N450000 Longitude:W1140000,W1160000 MONOGRAPH TITLE: Symposium on the Geology and mineral deposits of the Challis 1 degreesX2 degrees Quadrangle, Idaho PUBLICATION TYPE: Serial; Report; Conference document; Analytic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geol. Surv., USA, (United States) ACCESSION NUMBER: 1986-034057 AUTHORS: Ekren, E B COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology CONFERENCE INFORMATION: Northwest Mining Association Convention ; symposium on the Geology andmineral deposits of the Challis 1 degrees X2 degrees Quadrangle,Spokane, WA, United States, Dec. 1-2, 1983 COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: Boise County Idaho; cauldrons; Cenozoic; central Idaho; ChallisQuadrangle; CUSMAP; Custer County Idaho; economic geology; Eocene;Idaho; igneous rocks; Lemhi County Idaho; mineral resources;Paleogene; petrology; pyroclastics; Tertiary; tuff; United States;USGS; Valley County Idaho; volcanic features; volcanic rocks;volcanism; volcanology ISSN: 8755-531X LANGUAGE: English PUBLICATION YEAR: 1985 RESEARCH PROGRAM: B 1658 A-S SOURCE: U. S. Geological Survey Bulletin, Report: B 1658 A-S, pp.43-58, 1985 TITLE: Eocene cauldron-related volcanic events in the Challis Quadrangle UPDATE CODE: 1986 ---------------------------------------------------------------------------------------------------------- (Reference 103) GEOREF: 1987-074331 CODEN: XGROAG COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 11; 5 tables PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, CA, United States USA AUTHORS: Frost, Thomas P. COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: California Cretaceous east-central California Fresno County California geochemistry granites granodiorites igneous rocks Inyo County California Lamarck Granodiorite mafic composition magmas major elements Mesozoic petrology plutonic rocks Sierra Nevada spectra trace elements

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United States Upper Cretaceous USGS X-ray spectra ISSN: 0196-1497 LANGUAGE: English PUBLISHER: U. S. Geological Survey, Reston, VA, United States USA PUBLICATION YEAR: 1987 SOURCE: Open-File Report - U. S. Geological Survey, Report: OF 87-0193, 38 pp., 1987 TITLE: Sample localities, descriptions, major- and trace-element abundances from the Lamarck Granodiorite and associated mafic rocks, eastern Sierra Nevada, California UPDATE CODE: 1987 ---------------------------------------------------------------------------------------------------------- (Reference 104) GEOREF: 1978-028935 CODEN: JRGSAW COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. FEATURES: References: 28; illus. incl. tables, sketch maps LATITUDE LONGITUDE: Latitude:N321500,N324500 Longitude:W1113000,W1114500 PUBLICATION TYPE: Serial; Analytic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, Calif., United States USA ACCESSION NUMBER: 1978-028935 AUTHORS: Banks, N G; Dockter, R D; Silberman, M L; Naeser, C W COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; Arizona; cartography; Cenozoic; Cretaceous; data; dates; Eloy Quadrangle; fission-track dating; geochronology; igneous rocks; K/Ar; Laramide Orogeny; lava; lava flows; Mesozoic; minerals; Oligocene; orogeny; overprinting; Paleogene; Pima County Arizona; Pinal County Arizona; plutonic rocks; pyroclastics; Tertiary; tuff; United States; USGS; Vaca Hills Quadrangle; volcanic rocks ISSN: 0091-374X LANGUAGE: English PUBLISHER: U. S. Geological Survey, Reston, VA, United States USA PUBLICATION YEAR: 1978 SOURCE: Journal of Research of the U. S. Geological Survey, vol.6, no.4, pp.439-445, Aug 1978 TITLE: Radiometric ages of some Cretaceous and Tertiary volcanic and intrusive rocks in South-central Arizona UPDATE CODE: 1978 ---------------------------------------------------------------------------------------------------------- (Reference 105) GEOREF: 1988-014414 CODEN: XGROAG COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments; 03 Geochronology

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COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 20; illus. incl. 5 tables, geol. sketch map PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, CA, United States USA AUTHORS: Frost, Thomas P COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments; 03 Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age California dates east-central California Fresno County California geochemistry geochronology igneous rocks intrusions Inyo County California Jurassic mafic composition major elements Mesozoic plutonic rocks plutons Sierra Nevada spectra trace elements United States Upper Jurassic USGS X-ray fluorescence spectra ISSN: 0196-1497 LANGUAGE: English PUBLISHER: U. S. Geological Survey, Reston, VA, United States USA PUBLICATION YEAR: 1987 SOURCE: Open-File Report - U. S. Geological Survey, Report: OF 87-0484, 32 pp., 1987 TITLE: Sample localities, radiometric ages, descriptions, and major- and trace-element abundances of Late Jurassic mafic plutonic rocks, eastern Sierra Nevada, California UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 106) GEOREF: 2004-035278 CODEN: XGROAG COLLECTION AUTHORS: 03 Geochronology; 16 Structural geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Medium: WWW FEATURES: References: 64; illus. incl. 4 tables, sketch maps LATITUDE LONGITUDE: Latitude:N433400,N465200 Longitude:W1134600,W1171700 MONOGRAPH TITLE: Location, age, and tectonic significance of the western Idaho suturezone (WISZ) PUBLICATION TYPE: Serial; Report; Monographic RESOURCE LOCATION: http://pubs.usgs.gov/of/2004/1039] SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geological Survey, Menlo Park, CA, United States (USA) ACCESSION NUMBER: 2004-035278 AUTHORS: Fleck, Robert J; Criss, Robert E COLLECTION AUTHORS: 03 Geochronology; 16 Structural geology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: absolute age; Ar/Ar; Cretaceous; dates; deformation; foliation;geochemistry; Idaho; intrusions; Jurassic; Mesozoic; metamorphism;plutons; Rb/Sr; Sm/Nd; suture zones; tectonics; United States; USGS ISSN: 0196-1497 LANGUAGE: English NOTES: Accessed on April 2, 2004 PUBLICATION YEAR: 2004 RESEARCH PROGRAM: OF 2004-1039 SOURCE: Open-File Report - U. S. Geological Survey, Report: OF 2004-1039, 48pp.,

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2004 UPDATE CODE: 200410 ---------------------------------------------------------------------------------------------------------- (Reference 107) GEOREF: 1975-012044 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Mechanics of intrusion and petrochemical evolution of the AdelMountain Volcanics ORGANIZATION: University of Montana, Missoula, MT, United States USA PAGES DATE: 104 pp. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic ACCESSION NUMBER: 1975-012044 AUTHORS: Beall, Joseph John COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Adel Mountain Volcanics; Adel Mountain Volcanies; alkali syenites;basalts; Big Belt Mountains; Broadwater County Montana; Cenozoic;Cretaceous; differentiation; dikes; experimental studies;geochemistry; igneous rocks; intrusions; laccoliths; layered; lowerTertiary; magmas; Meagher County Montana; mechanism; Mesozoic;Montana; North America; petrology; plutonic rocks; Rocky Mountains;syenites; Tertiary; U. S. Rocky Mountains; United States; UpperCretaceous; volcanic; volcanic rocks LANGUAGE: English NOTES: Diss. Abstr. Int., Vol. 34, No. 10, p. 5025B, 1974 PUBLICATION YEAR: 1973 UPDATE CODE: 1975 ---------------------------------------------------------------------------------------------------------- (Reference 108) GEOREF: 1988-073164 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 18; 1 table, geol. sketch maps LATITUDE LONGITUDE: Latitude:N372100,N372100 Longitude:W1184500,W1184500 PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: Univ. Calif.-Santa Barbara, United States USA ACCESSION NUMBER: 1988-073164 AUTHORS: Frost, Thomas P; Mattinson, James M COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; California; Central California; Cretaceous; dates; geochronology; intrusions; Inyo County California; Mesozoic; Mono Pass; Mount Tom Quadrangle; Pine Creek Basin; Pine Lake; plutons; Sierra Nevada; U/Pb; United States; Upper Cretaceous ISSN: 0099-6882

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LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology, Socorro, NM, United States USA PUBLICATION YEAR: 1988 SOURCE: Isochron/West, vol.51, pp.15-18, Jul 1988 TITLE: Late Cretaceous U-Pb age of a mafic intrusion from the eastern Sierra Nevada, California UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 109) GEOREF: 1995-071354 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. ORGANIZATION: Florida State University, Tallahassee, FL, United States USA PAGES DATE: 648 pp. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic ACCESSION NUMBER: 1995-071354 AUTHORS: Campbell, Steven Kent AVAILABILITY: University Microfilms, Ann Arbor, MI, United States USA COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkalic composition; alkaline earth metals; andesites; Badger Creek Tuff; basalts; Buffalo Peaks; calc-alkalic composition; Cenozoic; central Colorado; Colorado; Colorado mineral belts; crystal fractionation; Denver Basin; Fish Canyon Tuff; genesis; geochemistry; granites; igneous rocks; isotopes; lahars; Laramide Orogeny; latite; lherzolite; lithophile elements; mass movements; melting; metals; Mount Aetna volcanic center; Mount Princeton Batholith; Oligocene; Paleogene; peridotites; plutonic rocks; rhyolites; San Juan volcanic field; shoshonite; Sr-87/Sr-86; stable isotopes; strontium; Tertiary; Thirtynine Mile volcanic field; trachyandesites; trachytes; ultramafics; United States; volcanic rocks; Wall Mountain Tuff LANGUAGE: English NOTES: In two volumes PUBLICATION YEAR: 1994 TITLE: A geochemical and strontium isotopic investigation of Laramide and younger igneous rocks in central Colorado, with emphasis on the petrogenesis of the Thirtynine Mile volcanic field UPDATE CODE: 199524 ---------------------------------------------------------------------------------------------------------- (Reference 110) GEOREF: 1983-039777 CODEN: BUGMAF COLLECTION AUTHORS: 02D, Isotope geochemistry COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 90; illus. incl. 2 tables, geol. sketch map

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LATITUDE LONGITUDE: Latitude:N432000,N453000 Longitude:W1142000,W1163000 PUBLICATION TYPE: Serial; Analytic ABSTRACT: Eocene hydrothermal alteration around epizonal granite plutons.Systematic mapping shows that anomalous delta D and delta (super 18) Ovalues occur over more than 15,000 km (super 2) , indicating theextensive lateral dimensions of the ancient circulating systems. Mostof the ore deposits in the southern half of the batholith areepithermal and mesothermal Au-Ag veins that are located near theperiphery of the low- (super 18) O zones. This association links thesedeposits with the Tertiary hydrothermal activity and has greatpotential as an exploration tool in the heavily forested region. TheEocene ground-water circulation pattern was affected over largelateral distances (25 to 50 km) and great depths (5 to 7 km).Circulation patterns are related to caldera ring structures and may beof particular importance in geothermal exploration and exploitation ofanalogous modern systems.--Modified journal abstract. AUTHOR AFFILIATION: Calif. Inst. Technol., Div. Geol. and Planet. Sci., Pasadena, CA,United States (USA) ACCESSION NUMBER: 1983-039777 AUTHORS: Criss, R E; Taylor, Hugh P, Jr COLLECTION AUTHORS: 02D, Isotope geochemistry COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: Boise County Idaho; Cenozoic; chloritization; D/H; deuterium; ElmoreCounty Idaho; Eocene; geochemical methods; geochemistry; geothermalenergy; gold ores; hydrogen; hydrothermal alteration; hydrothermalprocesses; Idaho; Idaho Batholith; igneous rocks; isotopes; metalores; metasomatism; mineral deposits, genesis; mineral exploration;minerals; O-18/O-16; ore guides; ore-forming fluids; oxygen;Paleogene; plutonic rocks; processes; propylitization; silicates;silver ores; stable isotopes; Tertiary; United States; Valley CountyIdaho ISSN: 0016-7606 LANGUAGE: English NOTES: Calif. Inst. Technol., Div. Geol. and Planet. Sci.; Contrib. No. 3575 PUBLICATION YEAR: 1983 SOURCE: Geological Society of America Bulletin, vol.94, no.5, pp.640-663, May1983 TITLE: An (super 18) O/ (super 16) O and D/H study of Tertiary hydrothermalsystems in the southern half of the Idaho Batholith UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 111) GEOREF: 1997-076709 CODEN: _NULL_ COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 82; illus. incl. 7 tables PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic SPONSOR: _NULL_ ABSTRACT: The Fine Gold Intrusive Suite FGIS, located at the western edge of the Sierra Nevada batholith north of Fresno, California, is one of a number of Late Cretaceous intrusive complexes that become progressively younger to the east. Systematic west-to-east compositional variations across the batholith include an increase in K sub 2 O and Rb abundances and initial super 87 Sr/ super 86 SrSr

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sub i values and a decrease in initial super 143 Nd/ super 144 Nd values. Several geochemical and tectonic boundaries have been proposed to traverse the FGIS including the Sr sub i = 0.706 isopleth, the boundary between Panthalassan and North American lithosphere, and the boundary between terranes having contrasting magnetic susceptibility intensities. The present study was developed in order to assess these proposed boundaries and characterize source magmas of this westernmost Cretaceous intrusive suite. The petrography, major-oxide and trace-element abundances, and isotopic parameters were studied for samples from each of the five major lithodemes which comprise the FGIS. These are: 1 the Tonalite of Ross Creek, a small, relatively mafic pluton; 2 the granodiorites of Arch rock; 3 the Ward Mountain Trondhjemite; and 4 the Knowles Granodiorite--all small, relatively felsic plutons; and 5 the extensive Bass Lake Tonalite, which varies from tonalite to granodiorite. All FGIS lithodemes belong to the calc-alkaline magma series and are depleted in K, Rb, Nb, and Ta. Rare-earth element REE patterns show that FGIS samples are moderately enriched in the light REE relative to chondrites La sub N = 16 to 110, exhibit moderate light REE fractionation La sub N /Lu sub N = 2 to 37, and have a Eu-anomaly which is small or negligible. Isotopic data measured on a subset of six samples show the following ranges: Sr sub i = 0.7044 to 0.7061, initial super 143 Nd/ super 144 Nd = 0.51246 to 0.51270 epsilon sub Nd = +2.0 to -3.6, delta super 18 O = 9.9 to 12.1 per mil measured on plagioclase separates, super 206 Pb/ super 204 Pb = 18.88 to 19.28, super 207 Pb/ super 204 Pb = 15.62 to 15.68, and super 208 Pb/ super 204 Pb = 38.81 to 39.34. Data from this study and from the literature on the Sherman Thomas pluton, a 126-Ma subsurface trondhjemite located just to the west of the FGIS, suggest that the Cretaceous mantle in this area had an Sr sub i of 0.7032 and an initial super 143 Nd/ super 144 Nd of 0.51297 epsilon sub Nd = +9.2, only slightly more evolved than mantle sources of mid-ocean ridge basalts. Oxygen data delta super 18 O = 9.2 per mil indicate that the Sherman Thomas magma interacted with sedimentary material. Limited data on the Ward Mountain and Knowles bodies suggest that primitive mantle magmas interacted with crustal material to a limited degree, resulting in slightly raised Sr sub i and slightly lowered super 143 Nd/ super 144 Nd values. More extensive data for the Bass Lake Tonalite available from this study and the literature suggest that this mapped body may be a composite complex consisting of four distinct members. Rocks located south and west of the Coarsegold roof pendant originated from mantle melts that interacted with crustal rocks which resulted in a little oxidized, homogeneous magma with Sr sub i of 0.7045 and initial super 143 Nd/ super 144 Nd of 0.51270 epsilon sub Nd = +1.1 that then evolved by fractional crystallization with little further crustal interaction. Rocks located just to the north and east of the pendant underwent the same sequence, but interaction with two different types of crustal rocks yielded two distinct initial magmas; one was little oxidized with Sr sub i of 0.7057 and initial super 143 Nd/ super 144 Nd of 0.51253 epsilon sub Nd = +1.3 and another one was highly oxidized with Sr sub i of 0.7061 and initial super 143 Nd/ super 144 Nd of 0.51246 epsilon sub Nd = -2.1. Both of these magmas then evolved by fractional crystallization with little further crustal interaction. A fourth variety of magma may comprise Bas AUTHOR AFFILIATION: California State University, Northridge, Northridge, CA, United States USA AUTHORS: Truschel, John Paul COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkaline earth metals California Cretaceous Fine Gold Intrusive Suite genesis geochemistry intrusions isotope ratios isotopes lead magmas major elements Mesozoic metals Nd-144/Nd-143 neodymium petrography rare earths Sierra Nevada Batholith Sr-87/Sr-86 stable isotopes strontium trace elements United States Upper Cretaceous

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ISSN: _NULL_ LANGUAGE: English PUBLISHER: _NULL_ PUBLICATION YEAR: 1996 SOURCE: _NULL_ TITLE: Petrogenesis of the Fine Gold intrusive suite, Sierra Nevada Batholith, California UPDATE CODE: 199724 ---------------------------------------------------------------------------------------------------------- (Reference 112) GEOREF: 1988-041862 CODEN: BUGMAF COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 84; illus. incl. 2 tables, sketch maps PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. Calif., Dep. Geol. and Geophys., Berkeley, CA, United States USA AUTHORS: Ague, Jay J; Brimhall, George H COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: accessory minerals batholiths California Central California chemical composition composition diorites electron probe data geochemistry granites granodiorites igneous rocks intrusions mafic composition major elements mineral composition minor elements North America Peninsular Ranges Peninsular Ranges Batholith plutonic rocks plutons regional patterns Sierra Nevada Sierra Nevada Batholith Southern California trace elements United States ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1988 SOURCE: Geological Society of America Bulletin, vol.100, no.6, pp.891-911, Jun 1988 TITLE: Regional variations in bulk chemistry, mineralogy, and the compositions of mafic and accessory minerals in the batholiths of California; with Suppl. Data 88-13 UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 113) GEOREF: 1991-003838 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic AUTHOR AFFILIATION: University of California, Santa Barbara, Goleta, CA, United

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States USA AUTHORS: Hirt, William Henry COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkaline earth metals aplite California chemical composition Cretaceous crystallization fractional crystallization granites granodiorites igneous rocks intrusions isotopes lead Lone Pine Creek magmas major elements Mesozoic metals mineral assemblages mineral composition mixing Mount Whitney Mount Whitney intrusive suite P-T conditions Paradise Pluton petrology plutonic rocks plutons ratios saturation Sierra Nevada Sr-87/Sr-86 stable isotopes strontium Sugarloaf United States Upper Cretaceous Whitney Pluton zoning LANGUAGE: English PUBLICATION YEAR: 1989 TITLE: The petrological and mineralogical zonation of the Mount Whitney intrusive suite, eastern Sierra Nevada, California UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 114) GEOREF: 1990-041542 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 13; illus. incl. 1 table, sketch map PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: U. S. Geol. Surv., Denver, CO, United States USA ACCESSION NUMBER: 1990-041542 AUTHORS: Marvin, Richard F; Mehnert, Harald H; Naeser, Charles W; Zartman,Robert E COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; alkali feldspar; amphibole group; apatite; biotite;Cenozoic; chain silicates; clinoamphibole; dates; Eocene; feldspargroup; fission-track dating; framework silicates; geochronology;hornblende; Idaho; K/Ar; mica group; microcline; minerals; Miocene;muscovite; Neogene; nesosilicates; Oligocene; Oregon; orthoclase;orthosilicates; Paleogene; Phanerozoic; phosphates; plagioclase;Precambrian; Rb/Sr; sanidine; septechlorite; sheet silicates;silicates; Tertiary; U/Th/Pb; United States; Washington; whole rock;zircon ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1989 SOURCE: Isochron/West, vol.53, pp.3-13, Jun 1989 TITLE: U. S. Geological Survey radiometric ages; Compilation C; Part four;Idaho, Oregon, and Washington UPDATE CODE: 1990 ----------------------------------------------------------------------------------------------------------

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(Reference 115) GEOREF: 1990-041543 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 17; sketch map PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: U. S. Geol. Surv., Denver, CO, United States USA ACCESSION NUMBER: 1990-041543 AUTHORS: Marvin, Richard F; Mehnert, Harald H; Naeser, Charles W; Zartman,Robert E COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; actinolite; alkali feldspar; amphibole group; apatite;biotite; Cenozoic; chain silicates; clinoamphibole; Colorado;Cretaceous; dates; Eocene; feldspar group; fission-track dating;framework silicates; geochronology; hornblende; Jurassic; K/Ar;Mesozoic; mica group; minerals; Montana; muscovite; nesosilicates;Oligocene; orthosilicates; Paleogene; Phanerozoic; phosphates;plagioclase; Precambrian; sanidine; sheet silicates; silicates;Tertiary; titanite; U/Th/Pb; United States; Upper Cretaceous; Utah;whole rock; Wyoming; zircon ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1989 SOURCE: Isochron/West, vol.53, pp.14-19, Jun 1989 TITLE: U. S. Geological Survey radiometric ages; Compilation C; Part five;Colorado, Montana, Utah, and Wyoming UPDATE CODE: 1990 ---------------------------------------------------------------------------------------------------------- (Reference 116) GEOREF: 1990-041544 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 26; illus. incl. 2 tables, sketch map LATITUDE LONGITUDE: Latitude:N380100,N385900 Longitude:W1165400,W1175400 PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, CA, United States USA ACCESSION NUMBER: 1990-041544 AUTHORS: John, David A; Robinson, Allen C COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; alkaline earth metals; Belmont Pluton; Crow Springs Pluton; dates; Fraziers Well Pluton; geochronology; granites; igneous rocks; Illinois Stock; intrusions; isotopes; Lone Mountain Pluton; Mesozoic; metals; Nevada; Ophir Pluton; Pipe Springs; plutonic rocks; plutons; Rb/Sr; Round Mountain Pluton; Shoshone Mountain; Sr-87/Sr-86; stable isotopes; strontium; Tonopah Quadrangle; United States; volcanic rocks; whole rock

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ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology, Socorro, NM, United States USA PUBLICATION YEAR: 1989 SOURCE: Isochron/West, vol.53, pp.20-27, Jun 1989 TITLE: Rb-Sr whole-rock isotopic ages of granitic plutons in the western part of the Tonopah 1 degrees by 2 degrees Quadrangle, Nevada UPDATE CODE: 1990 ---------------------------------------------------------------------------------------------------------- (Reference 117) GEOREF: 1990-052600 CODEN: XDIGAS COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 49; illus. incl. 3 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N405000,N420000 Longitude:W1131500,W1142500 MONOGRAPH TITLE: K-Ar ages of Jurassic to Tertiary plutonic and metamorphic rocks,northwestern Utah and northeastern Nevada PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: Five granitoid plutons in the Newfoundland Mountains, Silver IslandMountains, and Toano Range yielded Late Jurassic 155- to 150-Ma,Late Cretaceous 77-Ma, and late Eocene 37-Ma K-Ar ages. Thesecooling ages somewhat postdate the times of pluton emplacement, butthey correspond closely to other K-Ar ages for plutons in the regionsuggesting that these ages approximate the times for regionwide pulsesof plutonism. Metamorphic rocks in the Toano Range yielded a scatterof K-Ar mica ages from 94 to 61 Ma that is interpreted as variableresetting of ages by a thermal event caused by nearby Late Cretaceousplutonism followed by prolonged cooling. In contrast, metamorphicmica from the western Raft River Mountains yielded a Tertiary 30-MaK-Ar age that corresponds well to previous dating of the metamorphismin that metamorphic core complex. AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States ACCESSION NUMBER: 1990-052600 AUTHORS: Miller, David M; Nakata, John K; Glick, Linda L COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; biotite; Box Elder County Utah; Cenozoic; cooling;Cretaceous; dates; dikes; Elko County Nevada; emplacement; Eocene;evolution; geochronology; igneous rocks; intrusions; Jurassic; K/Ar;Mesozoic; metamorphic rocks; metamorphism; mica group; muscovite;Nevada; Newfoundland Mountains; northeastern Nevada; northwesternUtah; Paleogene; plutonic rocks; plutons; sericite; sheet silicates;silicates; Silver Island Mountains; Tertiary; thermal history; ToanoRange; United States; Upper Cretaceous; upper Eocene; Upper Jurassic;USGS; Utah ISSN: 8755-531X LANGUAGE: English PUBLICATION YEAR: 1990 RESEARCH PROGRAM: B 1906 SOURCE: U. S. Geological Survey Bulletin, Report: B 1906, 18 pp., 1990 UPDATE CODE: 1990

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---------------------------------------------------------------------------------------------------------- (Reference 118) GEOREF: 1990-053217 CODEN: GSAMAQ AUTHOR AFFILIATION: U. S. Geol. Surv., Denver, CO, United States ACCESSION NUMBER: 1990-053217 AUTHORS: Stein-Holly-J; Crock-James-G BOOK AUTHORS: Anderson-J-Lawford editor BOOK TITLE: In: The nature & origin of Cordilleran magmatism. BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: alkaline-earth-metals; batholiths-; calc-alkalic-composition; Cenozoic-; Colorado-; Colorado-mineral-belt; Cretaceous-; geochemistry-; granites-; igneous-rocks; intrusions-; isotopes-; laccoliths-; Mesozoic-; metals-; metasomatism-; mixing-; models-; monzonites-; Nd-144-Nd-143; neodymium-; plutonic-rocks; plutons-; rare-earths; ratios-; Sm-Nd; Sr-87-Sr-86; stable-isotopes; stocks-; strontium-; syenites-; Tertiary-; trace-elements; United-States; Upper-Cretaceous; volcanic-rocks DOCUMENT TYPE: Serial ISBN: 0-8137-1174-6 ILLUSTRATION: Refs 106; illus. incl. 3 tables, geol. sketch maps. ISSN: 0072-1069 LANGUAGE: English PUBLISHER: Geological Society of America GSA. Boulder, CO, United States. 1990. PUBLICATION YEAR: 1990 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Memoir - Geological Society of America. 174; Pages 195-223. 1990. . TITLE: Late Cretaceous-Tertiary magmatism in the Colorado mineral belt; rare earth element and samarium-neodymium isotopic studies. UPDATE CODE: 1990 ---------------------------------------------------------------------------------------------------------- (Reference 119) GEOREF: 1990-058972 AUTHORS: Kuehn-C-A PUBLICATION YEAR: 1992 TITLE: Studies of disseminated gold deposits near Carlin, Nevada: Evidence for a deep geologic setting of ore formation [Ph.D. thesis]: Pennsylvania State University, 395 p. ---------------------------------------------------------------------------------------------------------- (Reference 120)

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GEOREF: 1990-067316 CODEN: #03094 AUTHOR AFFILIATION: U. S. Geol. Surv., Denver, CO, United States ACCESSION NUMBER: 1990-067316 AUTHORS: Bryant-Bruce; Naeser-Charles-W; Stegen-Ralph-J BOOK AUTHORS: Beaty-David-W editor; Landis-Gary-P editor; Thompson-Tommy-B editor BOOK TITLE: In: Carbonate-hosted sulfide deposits of the central Colorado mineral belt. BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology COUNTRY OF PUBLICATION: Switzerland DESCRIPTORS: alteration-; apatite-; Aspen-District; Carboniferous-; central-Colorado; clastic-rocks; Colorado-; country-rocks; Cretaceous-; fission-track-dating; geochronology-; granites-; igneous-rocks; lead-zinc-deposits; Leadville-Formation; Mesozoic-; metal-ores; minerals-; Mississippian-; nesosilicates-; orthosilicates-; Paleozoic-; phosphates-; plutonic-rocks; porphyry-; sandstone-; sedimentary-rocks; silicates-; silver-ores; thermal-history; United-States; zircon- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 21; 1 table, geol. sketch map. ISSN: 1042-0940 LANGUAGE: English PUBLISHER: Harwood Academic Publishers. Chur, Switzerland. 1990. PUBLICATION YEAR: 1990 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Ichnos Chur, Switzerland. 7; Pages 301-307. 1990. TITLE: Reconnaissance fission-track geochronology of the Aspen mining district, central Colorado. UPDATE CODE: 1990 ---------------------------------------------------------------------------------------------------------- (Reference 121) GEOREF: 1990-900078 (unpublished Georef; Navdat only) MONOGRAPH TITLE: The geochemistry of the Atlanta Lobe of the Idaho Batholith in the Western United States Cordillera ORGANIZATION: The Open University PAGES DATE: 357 pp. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic ACCESSION NUMBER: 1990-900078 AUTHORS: Clarke, Christopher Brian COUNTRY OF PUBLICATION: United Kingdom (UK) LANGUAGE: English PUBLICATION YEAR: 1990 ---------------------------------------------------------------------------------------------------------- (Reference 122) GEOREF: 1992-049812

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CODEN: XGPPA9 COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. FEATURES: References: 260; illus. incl. 17 tables MONOGRAPH TITLE: Chemistry of the subalkalic silicic obsidians PAGES DATE: 214 pp. PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: More than 200 new analyses for major and minor elements, including halogens, are presented for obsidians > 70 percent SiO sub 2 of worldwide occurrence. An additional 130 analyses for major elements are compiled from the literature. This data base establishes the patterns of chemical variation in obsidians in the context of five major plate-tectonic regimes of the Earth's crust, and in terms of major petrogenetic processes. All major and many minor elements are summarized individually. AUTHOR AFFILIATION: U. S. Geological Survey, USA, United States ACCESSION NUMBER: 1992-049812 AUTHORS: Macdonald, Ray; Smith, Robert L; Thomas, John E COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: acidic composition; acidic magmas; alkalic composition; bibliography; catalogs; chemical analysis; classification; crust; data bases; data processing; differentiation; genesis; geochemistry; glasses; global; igneous rocks; magmas; major elements; metals; minor elements; obsidian; plate tectonics; rare earths; rhyolites; subalkalic composition; trace elements; USGS; volcanic rocks ISSN: 1044-9612 LANGUAGE: English PUBLISHER: U. S. Geological Survey, Reston, VA, United States USA PUBLICATION YEAR: 1992 RESEARCH PROGRAM: P 1523 SOURCE: U. S. Geological Survey Professional Paper, Report: P 1523, 214 pp., 1992 UPDATE CODE: 1992 ---------------------------------------------------------------------------------------------------------- (Reference 123) GEOREF: 1992-049839 CODEN: XDIGAS COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 18; illus. incl. 8 tables, geol. sketch map PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: Modal and major-element chemical analyses are presented for granitic rocks from the Triple Divide Peak 15-minute Quadrangle, Fresno and Tulare counties, California. Chemical analyses are integrated over the quadrangle to estimate the average granitic rock composition. The origin of this average granitic rock is explored by modeling of crystallization-differentiation. AUTHOR AFFILIATION: U. S. Geological Survey, USA, United States

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AUTHORS: Sisson, Thomas W COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: batholiths California chemical composition composition crystallization differentiation east-central California Fresno County California granites igneous rocks intrusions magmas major elements mineral composition Mitchell Intrusive Suite modal analysis Mount Whitney Intrusive Suite petrology plutonic rocks Sequoia Intrusive Suite Sierra Nevada Batholith Triple Divide Peak Quadrangle Tulare County California United States USGS ISSN: 8755-531X LANGUAGE: English PUBLICATION YEAR: 1992 SOURCE: U. S. Geological Survey Bulletin, Report: B 2026, 18 pp., 1992 TITLE: Triple Divide Peak Quadrangle, Fresno and Tulare counties, California; analytic data UPDATE CODE: 1992 ---------------------------------------------------------------------------------------------------------- (Reference 124) GEOREF: 1992-055322 COLLECTION AUTHORS: 13, Areal geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Type: geologic maps MAP TYPE: geologic-maps MONOGRAPH TITLE: Geology of the southeastern Owyhee Mountains and environs, OwyheeCounty, Idaho ORGANIZATION: Stanford University, Stanford, CA, United States USA PUBLICATION TYPE: Thesis or dissertation; Map; Master's; Monographic ACCESSION NUMBER: 1992-055322 AUTHORS: Neill, William Marshall BOOK AUTHORS: Neill-William-Marshall BOOK TITLE: Geology of the southeastern Owyhee Mountains and environs, Owyhee County, Idaho. BIB LEVEL: Monograph CATEGORY CODES: 13-Areal-geology COLLECTION AUTHORS: 13, Areal geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: areal geology; Idaho; Owyhee County Idaho; Owyhee Mountains; UnitedStates DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: Stanford University. Stanford, CA, United States. DOCUMENT TYPE: Thesis-or-Dissertation; Map LANGUAGE: English MAP TYPE: geologic-maps PUBLICATION YEAR: 1975 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1992 ----------------------------------------------------------------------------------------------------------

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(Reference 125) GEOREF: 1993-002106 CODEN: SCIEAS COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 26; illus. incl. 1 table, sketch map PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors ABSTRACT: _NULL_ AUTHOR AFFILIATION: U. S. Geological Survey, United States USA AUTHORS: Coleman, Drew S; Frost, Thomas P; Glazner, Allen F COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkaline earth metals batholiths California Central California Cretaceous crust diorites Fresno County California gabbros granites granodiorites igneous rocks intrusions Inyo County California isotopes Lamarck Granodiorite Mesozoic metals Nd-144/Nd-143 neodymium plutonic rocks rare earths Sierra Nevada Batholith Sr-87/Sr-86 stable isotopes strontium trace elements Tulare County California United States Upper Cretaceous ISSN: 0036-8075 LANGUAGE: English PUBLISHER: _NULL_ PUBLICATION YEAR: 1992 SOURCE: Science, vol.258, no.5090, pp.1924-1926, 18 Dec 1992 TITLE: Evidence from the Lamarck Granodiorite for rapid Late Cretaceous crust formation in California UPDATE CODE: 1993 ---------------------------------------------------------------------------------------------------------- (Reference 126) GEOREF: 1993-003024 CODEN: PEPIAM LATITUDE LONGITUDE: LAT| N392000; N394500; LONG: W1145500; W1151500. AUTHOR AFFILIATION: State University of New York at Binghamton, Department of Geological Sciences, Binghamton, NY, United States ACCESSION NUMBER: 1993-003024 AUTHORS: MacDonald-W-D; Palmer-H-C; Hayatsu-A BIB LEVEL: Analytic CATEGORY CODES: 12-Stratigraphy; 03-Geochronology COUNTRY OF PUBLICATION: Netherlands DESCRIPTORS: absolute-age; Cenozoic-; dacites-; dates-; east-central-Nevada; Egan-Range; Eocene-; geochronology-; igneous-rocks; K-Ar; lava-; magnetic-susceptibility; middle-Tertiary; Nevada-; Oligocene-; Paleogene-; paleomagnetism-; pole-positions; Tertiary-; trachydacite-; United-States; volcanic-rocks; White-Pine-County-Nevada DOCUMENT TYPE: Serial ILLUSTRATION: Refs 16; illus. incl. block diags., 5 tables, geol. sketch map. ISSN: 0031-9201 LANGUAGE: English

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PUBLISHER: Elsevier. Amsterdam, Netherlands. 1992. PUBLICATION YEAR: 1992 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Physics of the Earth and Planetary Interiors. 74; 3-4, Pages 109-126. 1992. TITLE: Egan Range volcanic complex, Nevada; geochronology, paleomagnetism and magnetic fabrics. UPDATE CODE: 1993 ---------------------------------------------------------------------------------------------------------- (Reference 127) GEOREF: 1993-003223 COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic AUTHOR AFFILIATION: California Institute of Technology, Pasadena, CA, United States USA AUTHORS: Knott, Diane Clemens COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkaline earth metals Alps assimilation California continental crust Cretaceous crust cumulates dikes Europe fractional crystallization genesis granites igneous rocks inclusions intrusions isotopes Italy Ivrea-Verbano Zone Lower Cretaceous magmas Mesozoic metals Nd-144/Nd-143 neodymium O-18/O-16 oxygen plutonic rocks rare earths Sierra Nevada Batholith Southern Europe Sr-87/Sr-86 stable isotopes strontium Tulare County California United States xenoliths LANGUAGE: English PUBLICATION YEAR: 1992 TITLE: Geologic and isotopic investigations of the Early Cretaceous Sierra Nevada Batholith, Tulare County, California, and the Ivrea Zone, Northwest Italian Alps; examples of interaction between mantle-derived magma and continental crust UPDATE CODE: 1993 ---------------------------------------------------------------------------------------------------------- (Reference 128) GEOREF: 1993-010616 CODEN: ECGLAL AUTHOR AFFILIATION: ASARCO, Reno, NV, United States ACCESSION NUMBER: 1993-010616 AUTHORS: Maher-Brian-J; Browne-Quentin-J; McKee-Edwin-H BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits; 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; age-; base-metals; Battle-Mountain-Eureka-mineral-belt; Chert-Cliff; copper-ores; dates-; distribution-; East-Summit-Dome; gold-

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ores; host-rocks; hydrothermal-alteration; K-Ar; metal-ores; metallogeny-; metals-; metasomatism-; mineral-deposits,-genesis; molybdenum-ores; Nevada-; north-central-Nevada; Paleozoic-; precious-metals; production-; reserves-; Roberts-Creek-Mountain; Roberts-Mountains; sedimentary-rocks; silver-ores; Tonkin-Spring-Mine; United-States; zinc-ores DOCUMENT TYPE: Serial ILLUSTRATION: Refs 55; illus. incl. sect., 2 tables, geol. sketch maps. ISSN: 0361-0128 LANGUAGE: English PUBLISHER: Economic Geology Publishing Company. Lancaster, PA, United States. 1993. PUBLICATION YEAR: 1993 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists. 88; 2, Pages 469-478. 1993. TITLE: Constraints on the age of gold mineralization and metallogenesis in the Battle Mountain-Eureka mineral belt, Nevada. UPDATE CODE: 1993 ---------------------------------------------------------------------------------------------------------- (Reference 129) GEOREF: 1994-001298 CODEN: JGEOAZ COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology; 06ASedimentary petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 66; illus. incl. sects., strat. cols., 3 tables, geol.sketch maps LATITUDE LONGITUDE: Latitude:N435000,N442500 Longitude:W1132000,W1135000 PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: U. S. Geological Survey, United States USA ACCESSION NUMBER: 1994-001298 AUTHORS: Janecke, Susanne U; Snee, Lawrence W COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology; 06ASedimentary petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Ar/Ar; Butte County Idaho; Cenozoic; central Idaho;Challis Volcanics; clastic rocks; conglomerate; Custer County Idaho;dates; Eocene; Idaho; igneous rocks; lava; Lemhi County Idaho; LemhiRange; Lost River Range; magmas; middle Eocene; Oligocene; Paleogene;periodicity; pyroclastics; rhyolite tuff; sedimentary rocks;sedimentation; structural controls; syntectonic processes; Tertiary;tuff; United States; volcanic fields; volcanic rocks; volcanism ISSN: 0022-1376 LANGUAGE: English PUBLICATION YEAR: 1993 SOURCE: Journal of Geology, vol.101, no.5, pp.603-621, Sep 1993 TITLE: Timing and episodicity of middle Eocene volcanism and onset ofconglomerate deposition, Idaho UPDATE CODE: 1994

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---------------------------------------------------------------------------------------------------------- (Reference 130) GEOREF: 1994-005955 CODEN: BUGMAF LATITUDE LONGITUDE: LAT ABSTRACT: Magmatism in central Chihuahua occurred from at least 68 to 27.5 Ma, a duration that can be separated into two periods by an order of magnitude increase in the intensity of magmatism starting at 46 Ma. Activity prior to 46 Ma was volumetrically minor and possibly intermittent. The oldest rocks 68 Ma are a localized, very thick, intermediate-composition sequence of lava flows, debris flows, and related sediments. From 62 until at least 52 Ma, numerous small intrusives and felsic tuffs were emplaced locally. Between 46 and 27.5 Ma, the area was inundated with a quasi-steady supply of volcanic products. The post-46 Ma activity evolved through four distinct stages that produced two sequences of felsic ash-flow tuffs separated by a sequence of massive coarsely porphyritic lavas and tuffs of intermediate to felsic composition. These three calc-alkaline stages were gradually succeeded at about 31 Ma by mildly alkaline basaltic andesite lavas and rhyolitic tuffs with peralkaline characteristics. All volcanic activity terminated abruptly at 27.5 Ma. The most significant events in the evolution of this magmatism are its onset, its termination, and the profound increase in activity beginning at 46 Ma. In its timing and subdued intensity, the pre-46 Ma magmatism fits a setting within the interior of the Laramide Cordilleran orogen. A convergent magmatic arc had advanced eastward to central Chihuahua by at least 68 Ma. The oldest rocks are tilted, but volcanic rocks 46 Ma and younger were not deformed. The abrupt increase in magmatism at 46 Ma may be a manifestation of diminished compressional stress related to a decrease in the rate of plate convergence along western North America. The regional stress field remained in compression until about 31 Ma, which corresponds approximately to the time of transition from calc-alkaline to mildly alkaline mafic and peralkaline felsic volcanism. Magmatism ended at 27.5 Ma, prior to extensional faulting in the area, but generally coincident with the end of plate convergence along part of the continental margin of western Mexico. AUTHOR AFFILIATION: University of Texas at Austin, Department of Geological Sciences, Austin, TX, United States ACCESSION NUMBER: 1994-005955 AUTHORS: McDowell-Fred-W; Mauger-Richard-L BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Cenozoic-; Chihuahua-Mexico; Cretaceous-; dates-; histograms-; igneous-activity; igneous-rocks; K-Ar; magmas-; Mesozoic-; Mexico-; nesosilicates-; orthosilicates-; plutonic-rocks; silicates-; statistical-analysis; Tertiary-; U-Pb; Upper-Cretaceous; volcanic-rocks; zircon- DOCUMENT TYPE: Serial ILLUSTRATION: Refs ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America GSA. Boulder, CO, United States. 1994. PUBLICATION YEAR: 1994 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States SOURCE: Geological Society of America Bulletin. 106; 1, Pages 118-132. 1994. .

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TITLE: K-Ar and U-Pb zircon chronology of Late Cretaceous and Tertiary magmatism in central Chihuahua State, Mexico; with Suppl. Data 9403. UPDATE CODE: 199403 ---------------------------------------------------------------------------------------------------------- (Reference 131) GEOREF: 1994-022732 CODEN: ISOWAC AUTHOR AFFILIATION: U. S. Geological Survey, Menlo Park, CA, United States ACCESSION NUMBER: 1994-022732 AUTHORS: McKee-E-H; Best-M-G; Barr-D-L; Tingey-D-G BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkali-metals; argon-; basalts-; Basin-and-Range-Province; Cenozoic-; dates-; Great-Basin; igneous-rocks; isotope-ratios; K-Ar; lava-flows; lower-Miocene; mafic-composition; metals-; Miocene-; Neogene-; Nevada-; noble-gases; North-America; Oligocene-; Paleogene-; potassium-; Tertiary-; United-States; Utah-; volcanic-rocks DOCUMENT TYPE: Serial ILLUSTRATION: Refs 9; illus. incl. sketch map. ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology. Socorro, NM, United States. 1993. PUBLICATION YEAR: 1993 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Isochron/West. 60; Pages 15-18. 1993. TITLE: Potassium-argon ages of mafic and intermediate-composition lava flows in the Great Basin of Nevada and Utah. UPDATE CODE: 199411 ---------------------------------------------------------------------------------------------------------- (Reference 132) GEOREF: 1994-032750 CODEN: XDIGAS ABSTRACT: This report summarizes the Cenozoic stratigraphy of sedimentary and volcanic rocks of the Marysvale volcanic field, Utah, by compiling all available published isotopic ages and by presenting new K-Ar, fission-track, and super 40 Ar/ super 39 Ar ages on igneous rocks of the volcanic field. This report shows that the igneous rocks of the field, which is one of the largest in the West, range from 34 Ma Oligocene to Quaternary. ACCESSION NUMBER: 1994-032750 BOOK AUTHORS: Rowley-Peter-D; Mehnert-Harald-H; Naeser-Charles-W; Snee-Lawrence-W; Cunningham-Charles-G; Steven-Thomas-A; Anderson-John-J; Sable-Edward-G; Anderson-R-Ernest BOOK AUTHOR AFFILIATION: U. S. Geological Survey, USA, United States; Kent State University, United States

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BOOK TITLE: Isotopic ages and stratigraphy of Cenozoic rocks of the Marysvale volcanic field and adjacent areas, west-central Utah. BIB LEVEL: Monograph CATEGORY CODES: 03-Geochronology; 12-Stratigraphy; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Ar-Ar; Beaver-County-Utah; breccia-; Bullion-Canyon-Volcanics; calderas-; Cenozoic-; Claron-Formation; clastic-rocks; Colorado-Plateau; dates-; fission-track-dating; Garfield-County-Utah; geochronology-; igneous-rocks; intrusions-; Iron-County-Utah; K-Ar; lava-; lithostratigraphy-; Marysvale-volcanic-field; Millard-County-Utah; Mount-Dutton-Formation; Paleogene-; Piute-County-Utah; pyroclastics-; sedimentary-rocks; southwestern-Utah; Tertiary-; tuff-; United-States; USGS-; Utah-; volcanic-breccia; volcanic-centers; volcanic-features; volcanic-fields; volcanic-rocks; Washington-County-Utah; west-central-Utah DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs 180; illus. incl. 3 tables, geol. sketch map. ISSN: 8755-531X LANGUAGE: English PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 35. 1994. PUBLICATION YEAR: 1994 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: B 2071 RESEARCH PROGRAM: USGS Publications of the U. S. Geological Survey SOURCE: U. S. Geological Survey Bulletin. 1994. UPDATE CODE: 199415 URL: Availability http://ngmsvr.wr.usgs.gov/Prodesc/proddesc_22369.htm ---------------------------------------------------------------------------------------------------------- (Reference 133) GEOREF: 1991-000846 CODEN: JGEOAZ AUTHOR AFFILIATION: Univ. Ariz., Dep. Geosci., Tucson, AZ, United States ACCESSION NUMBER: 1991-000846 AUTHORS: Samson-Scott-D; Patchett-Jonathan-P; Gehrels-George-E; Anderson-Robert-G BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; accretion-; alkaline-earth-metals; British-Columbia; Canada-; clastic-rocks; continental-crust; crust-; evolution-; geochemistry-; igneous-rocks; interpretation-; isotopes-; metals-; Nd-144-Nd-143; neodymium-; plutonic-rocks; Queen-Charlotte-Islands; rare-earths; Rb-Sr; sedimentary-rocks; Sm-Nd; Sr-87-Sr-86; stable-isotopes; strontium-; terranes-; Vancouver-Island; volcanic-rocks; Western-Canada; Wrangellia- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 64; illus. incl. 2 tables, sketch maps. ISSN: 0022-1376 LANGUAGE: English PUBLISHER: University of Chicago Press. Chicago, IL, United States. 1990. PUBLICATION YEAR: 1990 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Journal of Geology. 98; 5, Pages 749-762. 1990.

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TITLE: Nd and Sr isotopic characterization of the Wrangellia Terrane and implications for crustal growth of the Canadian Cordillera. UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 134) GEOREF: 1991-000955 CODEN: GSAPAZ ACCESSION NUMBER: 1991-000955 BOOK AUTHORS: Gans-Phillip-B; Mahood-Gail-A; Schermer-Elizabeth-R BOOK AUTHOR AFFILIATION: Stanford Univ., Dep. Geol., Stanford, CA, United States; Mass. Inst. Technol., United States BOOK TITLE: Synextensional magmatism in the Basin and Range Province; a case study from the eastern Great Basin. BIB LEVEL: Monograph CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 16-Structural-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: andesites-; Arizona-; ash-flow-tuff; assimilation-; Basin-and-Range-Province; case-studies; Cenozoic-; eastern-Great-Basin; eruptions-; extension-faults; faults-; fractional-crystallization; genesis-; Great-Basin; igneous-rocks; Kalamazoo-Tuff; major-elements; melts-; mineral-composition; Nevada-; New-Mexico; North-America; petrology-; pyroclastics-; rates-; rhyolites-; sedimentary-rocks; strain-; structural-geology; tectonics-; textures-; thickness-; trace-elements; United-States; volcanic-rocks; volcanism-; zoning- DOCUMENT TYPE: Serial ISBN: 0-8137-2233-0 ILLUSTRATION: Refs 187; illus. incl. 2 tables, sects., strat. cols., geol sketch maps. ISSN: 0072-1077 LANGUAGE: English PUBLISHER: Geological Society of America GSA. Boulder, CO, United States. Pages: 53. 1989. PUBLICATION YEAR: 1989 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Special Paper - Geological Society of America. 233; 1989. UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 135) GEOREF: 1991-006637 CODEN: GLGYBA AUTHOR AFFILIATION: McGill Univ., Dep. Geol. Sci., Montreal, PQ, Canada ACCESSION NUMBER: 1991-006637 AUTHORS: Skulski-Thomas; Francis-Don; Ludden-John-N BIB LEVEL: Analytic CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 05A-Igneous-and-metamorphic-petrology; 18-Solid-earth-geophysics COUNTRY OF PUBLICATION: United-States

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DESCRIPTORS: Alaska-; alkalic-composition; alkaline-earth-metals; basalts-; Benioff-zone; calc-alkalic-composition; classification-; composition-; continental-crust; crust-; faults-; geochemistry-; hybridization-; igneous-rocks; island-arcs; isotopes-; lava-; magmas-; major-elements; mantle-; metals-; mid-ocean-ridge-basalts; North-American-Plate; ocean-island-basalts; Pacific-Plate; petrology-; plate-tectonics; pollution-; southern-Alaska; Sr-87-Sr-86; stable-isotopes; strike-slip-faults; strontium-; subduction-; trace-elements; transform-faults; United-States; upper-mantle; volcanic-belts; volcanic-rocks; volcanism-; volcanology-; Wrangellia- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 23; illus. incl. 1 table, sketch map. ISSN: 0091-7613 LANGUAGE: English PUBLISHER: Geological Society of America GSA. Boulder, CO, United States. 1991. PUBLICATION YEAR: 1991 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Geology Boulder. 19; 1, Pages 11-14. 1991. TITLE: Arc-transform magmatism in the Wrangell volcanic belt. UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 136) GEOREF: 1991-007027 CODEN: ISOWAC AUTHOR AFFILIATION: Calif. State Univ., Sacramento, CA, United States ACCESSION NUMBER: 1991-007027 AUTHORS: Hausback-Brian-P; Deino-Alan-L; Turrin-Brent-D; McKee-Edwin-H; Frizzell-Virgil-A Jr.; Noble-Donald-C; Weiss-Steven-I BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkali-feldspar; Ar-40-Ar-39; argon-; Cenozoic-; Civet-Cat-Canyon-Member; Civit-Cat-Canyon-Member; dates-; feldspar-group; framework-silicates; geochronology-; igneous-rocks; isotopes-; K-Ar; methods-; Miocene-; Neogene-; Nevada-; noble-gases; Nye-County-Nevada; pyroclastics-; radioactive-isotopes; sanidine-; silicates-; Spearhead-Member; stable-isotopes; Stonewall-Flat-Tuff; Tertiary-; tuff-; United-States; volcanic-rocks DOCUMENT TYPE: Serial ILLUSTRATION: Refs 18; illus. incl. 1 table, sketch map. ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology. Socorro, NM, United States. 1990. PUBLICATION YEAR: 1990 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Isochron/West. 56; Pages 3-7. 1990. TITLE: New Ar-40/ Ar-39 ages for the Spearhead and Civet Cat Canyon members of the Stonewall Flat Tuff, Nye County, Nevada; evidence for systematic errors in standard K-Ar age determinations on sanidine. UPDATE CODE: 1991

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---------------------------------------------------------------------------------------------------------- (Reference 137) GEOREF: 1991-007029 CODEN: ISOWAC COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 23; geol. sketch map PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: B. P. Explor., United States USA ACCESSION NUMBER: 1991-007029 AUTHORS: Sheriff, Steven D; Gunderson, Jay A COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Adel Mountain volcanic field; Cretaceous; dates;geochronology; igneous rocks; K/Ar; Mesozoic; Montana; United States;Upper Cretaceous; volcanic rocks; west-central Montana ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1990 SOURCE: Isochron/West, vol.56, pp.21-23, Dec 1990 TITLE: Age of the Adel Mountain volcanic field, west-central Montana UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 138) GEOREF: 1991-012343 CODEN: TCTNDM LATITUDE LONGITUDE: LAT| N350000; N360000; LONG: W1152000; W1153000. AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, CA, United States ACCESSION NUMBER: 1991-012343 AUTHORS: Fleck-Robert-J; Carr-Michael-D BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology; 16-Structural-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Ar-40-Ar-39; Ar-Ar; argon-; basins-; Clark-County-Nevada; Cretaceous-; dates-; foreland-basins; geochronology-; Goodsprings-Quadrangle; igneous-rocks; isotopes-; Keystone-Thrust; Lavinia-Wash; Lower-Cretaceous; Mesozoic-; Nevada-; noble-gases; pyroclastics-; radioactive-isotopes; Spring-Mountains; stable-isotopes; tuff-; United-States; volcanic-rocks DOCUMENT TYPE: Serial ILLUSTRATION: Refs 30; illus. incl. 3 tables, geol. sketch map. ISSN: 0278-7407 LANGUAGE: English PUBLISHER: American Geophysical Union. Washington, DC, United States. 1990. PUBLICATION YEAR: 1990 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Tectonics. 9; 3, Pages 467-476. 1990. TITLE: The age of the Keystone Thrust; laser-fusion super 40 Ar/ super 39 Ar

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dating of foreland basin deposits, southern Spring Mountains, Nevada. UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 139) GEOREF: 1991-012393 LATITUDE LONGITUDE: LAT| N400700; N403500; LONG: W1155000; W1160500. AUTHOR AFFILIATION: Univ. West. Ont., Dep. Geophys., London, ON, Canada ACCESSION NUMBER: 1991-012393 AUTHORS: Palmer-H-C; MacDonald-William-D; Hayatsu-A BIB LEVEL: Analytic CATEGORY CODES: 16-Structural-geology; 12-Stratigraphy; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; ash-flows; ash-flow-tuff; Basin-and-Range-Province; Cenozoic-; dates-; Diamond-Hills-Formation; Elko-County-Nevada; extension-tectonics; faults-; geochronology-; igneous-rocks; Indian-Well-Formation; K-Ar; magnetic-properties; magnetic-susceptibility; magnetization-; natural-remanent-magnetization; Nevada-; North-America; northeastern-Nevada; Oligocene-; Paleogene-; paleomagnetism-; pole-positions; pyroclastics-; remanent-magnetization; rotation-; strike-slip-faults; structural-geology; tectonics-; Tertiary-; Tuff-of-Hackwood; Tuff-of-Jiggs; United-States; volcanic-rocks; volcanism-; volcanology-; White-Pine-County-Nevada DOCUMENT TYPE: Serial ILLUSTRATION: Refs 62; illus. incl. 5 tables, sect., geol. sketch map. ISSN: 0885-3401 LANGUAGE: English PUBLISHER: American Geophysical Union. Washington, DC, United States. 1991. PUBLICATION YEAR: 1991 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Journal of Geophysical Research, B, Solid Earth and Planets. 96; 2, Pages 2185-2202. 1991. TITLE: Magnetic, structural and geochronologic evidence bearing on volcanic sources and Oligocene deformation of ash flow tuffs, Northeast Nevada. UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 140) GEOREF: 1991-017986 CODEN: BUGMAF COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 49; illus. incl. 3 tables, geol. sketch maps PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. Calif. at Santa Barbara, Dep. Geol. Sci., Santa Barbara, CA, United States USA AUTHORS: Chen, J H; Tilton, G R COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic

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petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkaline earth metals batholiths California Central California Fresno County California genesis geochemical profiles geochemistry granites granitic composition granulites igneous rocks intrusions Inyo County California isotopes lead magmas metals metamorphic rocks Pb-206/Pb-204 Pb-208/Pb-204 plutonic rocks radioactive isotopes ratios Sierra Nevada Batholith Sr-87/Sr-86 stable isotopes strontium Tulare County California United States ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1991 SOURCE: Geological Society of America Bulletin, vol.103, no.4, pp.439-447, Apr 1991 TITLE: Applications of lead and strontium isotopic relationships to the petrogenesis of granitoid rocks, central Sierra Nevada Batholith, California UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 141) GEOREF: 1991-038713 COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 80; illus. incl. 2 tables, geol. sketch maps LATITUDE LONGITUDE: Latitude:N472200,N473000 Longitude:W1102200,W1103800 MONOGRAPH TITLE: Mid-Tertiary Cordilleran magmatism; plate convergence versus intraplate processes PUBLICATION TYPE: Serial; Conference document; Analytic AUTHOR AFFILIATION: Univ. Wash., United States USA ACCESSION NUMBER: 1991-038713 AUTHORS: Anonymous COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology CONFERENCE INFORMATION: 1989 general assembly of the International Association of Volcanology and Chemistry of the Earth's Interior | Geological Society of America, Cordilleran Section, 86th annual meeting | Geological Society of America symposium on Eocene magmatism in the northwestern USA, Santa Fe, NM, United States | Tucson, AZ, 1988 COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkalic composition; alkaline earth metals; asthenosphere; Cenozoic; Chouteau County Montana; composition; Eocene; fractional crystallization; genesis; geochemistry; Highwood Mountains; hybridization; igneous rocks; isotopes; Judith Basin County Montana; lead; mafic magmas; magmas; metals; Montana; Nd-144/Nd-143; neodymium; north-central Montana; Paleogene; partial melting; petrology; plate tectonics; plutonic rocks; potassic composition; rare earths; Sr-87/Sr-86; stable isotopes; strontium; Tertiary; trace elements; United States; volcanic rocks ISSN: 0885-3401 LANGUAGE: English PUBLICATION YEAR: 1991 SOURCE: Journal of Geophysical Research, B, Solid Earth and Planets, vol.96, no.8, pp.13,237-13,260, 30 Jul 1991

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TITLE: Eocene potassic magmatism in the Highwood Mountains, Montana; petrology, geochemistry, and tectonic implications UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 142) GEOREF: 1991-038716 COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 46; illus. incl. 3 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N430000,N450000 Longitude:W1140000,W1161000 MONOGRAPH TITLE: Mid-Tertiary Cordilleran magmatism; plate convergence versusintraplate processes PUBLICATION TYPE: Serial; Conference document; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: U. S. Geol. Surv., United States (USA) ACCESSION NUMBER: 1991-038716 AUTHORS: Lewis, Reed S; Kiilsgaard, Thor H COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology CONFERENCE INFORMATION: 1989 general assembly of the International Association of Volcanologyand Chemistry of the Earth's Interior | Geological Society of America,Cordilleran Section, 86th annual meeting | Geological Society ofAmerica symposium on Eocene magmatism in the northwestern USA, SantaFe, NM, United States | Tucson, AZ, 1988 COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: Blaine County Idaho; Boise County Idaho; Camas County Idaho; Cenozoic;central Idaho; Challis Quadrangle; Custer County Idaho; diorites;Elmore County Idaho; Eocene; gabbros; geochemistry; Gooding CountyIdaho; granites; granodiorites; Hailey Quadrangle; Idaho; igneousrocks; Lemhi County Idaho; Lincoln County Idaho; major elements;monzodiorite; Paleogene; plutonic rocks; Tertiary; trace elements;United States; Valley County Idaho ISSN: 0885-3401 LANGUAGE: English PUBLICATION YEAR: 1991 SOURCE: Journal of Geophysical Research, B, Solid Earth and Planets, vol.96, no.8, pp.13,295-13,311, 30 Jul 1991 TITLE: Eocene plutonic rocks in south central Idaho UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 143) GEOREF: 1991-058697 CODEN: CJESAP LATITUDE LONGITUDE: LAT| N483000; N510000; LONG: W1233000; W1283000. SUMMARY LANGUAGE: French AUTHOR AFFILIATION: Univ. B.C., Dep. Geol. Sci., Vancouver, BC, Canada ACCESSION NUMBER: 1991-058697

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AUTHORS: Andrew-A; Armstrong-R-L; Runkle-D BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: Canada DESCRIPTORS: alkaline-earth-metals; Bonanza-Volcanics; British-Columbia; Canada-; Cenozoic-; Devonian-; Eocene-; Flores-Volcanics; geochemistry-; igneous-rocks; intrusions-; island-arcs; isotopes-; Jurassic-; Karmutsen-Group; lead-; Lithoprobe-; Mesozoic-; metals-; Metchosin-Volcanics; Nd-144-Nd-143; neodymium-; Paleogene-; Paleozoic-; plutonic-rocks; radioactive-isotopes; rare-earths; ratios-; Sicker-Group; Sr-87-Sr-86; stable-isotopes; strontium-; Tertiary-; Triassic-; upper-Paleozoic; Upper-Triassic; Vancouver-Island; volcanic-rocks; Western-Canada DOCUMENT TYPE: Serial ILLUSTRATION: Refs 50; illus. incl. 2 tables, sketch map. ISSN: 0008-4077 LANGUAGE: English ANNOTATION: Lithoprobe Contrib. No. 237. PUBLISHER: National Research Council of Canada. Ottawa, ON, Canada. 1991. PUBLICATION YEAR: 1991 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Canadian Journal of Earth Sciences = Journal Canadien des Sciences de la Terre. 28; 11, Pages 1744-1752. 1991. TITLE: Neodymium-strontium-lead isotopic study of Vancouver Island igneous rocks. UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 144) GEOREF: 1991-075638 CODEN: GSAPAZ COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. BOOK EDITORS: Perez-Segura, Efren; Jacques-Ayala, Cesar FEATURES: References: 32; illus. incl. 4 tables, geol. sketch maps MONOGRAPH TITLE: Studies of Sonoran geology PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. Sonora, Dep. Geol., Hermosillo, Mexico MEX AUTHORS: Roldan-Quintana, Jaime COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Aconchi Batholith; alkali granites; batholiths; cataclasis; chemical composition; dates; El Jaralito Batholith; geochemistry; granites; igneous rocks; intrusions; K/Ar; matrix; Mexico; mineral composition; pegmatite; petrology; phenocrysts; plutonic rocks; rhyolites; S-type granites; Sonora Mexico; stocks; volcanic rocks ISBN: 813722543 ISSN: 0072-1077 LANGUAGE: English PUBLISHER: Geological Society of America GSA, Boulder, CO, United States USA PUBLICATION YEAR: 1991 SOURCE: Special Paper - Geological Society of America, vol.254, pp.69-80, 1991

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TITLE: Geology and chemical composition of the Jaralito and Aconchi batholiths in east-central Sonora, Mexico UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 145) GEOREF: 1991-076080 ACCESSION NUMBER: 1991-076080 BOOK AUTHORS: Hill-Lena-Elizabeth BOOK TITLE: Slickrock Mountain; bimodal intrusive complex Big Bend National Park, Texas. BIB LEVEL: Monograph CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: batholiths-; Big-Bend-National-Park; Brewster-County-Texas; interpretation-; intrusions-; petrology-; Slickrock-Mountain; Texas-; United-States DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: Texas Tech University. Lubbock, TX, United States. Pages 59. 1985. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1985 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 146) GEOREF: 1991-078417 ACCESSION NUMBER: 1991-078417 BOOK AUTHORS: Jungyusuk-Nikom BOOK TITLE: Petrology of the Christmas Mountains igneous rocks, Trans-Pecos Texas. BIB LEVEL: Monograph CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Christmas-Mountains; igneous-rocks; interpretation-; petrology-; Texas-; Trans-Pecos; United-States DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: University of Texas, Austin. Austin, TX, United States. 1977. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1977 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1991 --------------------------------------------------------------------------------

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-------------------------- (Reference 147) GEOREF: 1992-009874 CODEN: XDIGAS COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 52; illus. incl. 3 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N455000,N463500 Longitude:W1142500,W1153000 MONOGRAPH TITLE: Constraints on the formation of the Bitterroot Lobe of the IdahoBatholith, Idaho and Montana, from U-Pb zircon geochronology andfeldspar Pb isotopic data PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: Zircons from tonalite emplaced along the western periphery of theBitterroot Lobe of the Idaho Batholith yield an almost concordant ageof 94+ or -1.4 Ma; monzogranite and granodiorite plutons along thenorthern edge of the lobe yield ages of 75 to 71 Ma. Thevolumetrically more dominant plutons in the central and western partsof the lobe were emplaced between 59 and 54 Ma. Upper intercept data,combined with Pb isotopic data from feldspars, confirm that the magmasof the Bitterroot Lobe were derived mainly from an early Proterozoiclower continental crust. AUTHOR AFFILIATION: U. S. Geol. Surv., USA, (United States) ACCESSION NUMBER: 1992-009874 AUTHORS: Toth, Margo I; Stacey, John S COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: absolute age; batholiths; Bitterroot Lobe; Bitterroot Range; Cenozoic;continental crust; Cretaceous; crust; dates; diorites; emplacement;feldspar group; framework silicates; genesis; geochronology; granites;granodiorites; Idaho; Idaho Batholith; Idaho County Idaho; igneousrocks; intrusions; isotopes; lead; lower crust; magmas; Mesozoic;metals; monazite; Montana; monzogranite; nesosilicates; North America;northern Idaho; orthosilicates; Paleoproterozoic; phosphates; plutonicrocks; plutons; Precambrian; Proterozoic; protoliths; Ravalli CountyMontana; Rocky Mountains; silicates; Tertiary; tonalite; U. S. RockyMountains; U/Pb; United States; upper Precambrian; USGS; westernMontana; zircon ISSN: 8755-531X LANGUAGE: English PUBLICATION YEAR: 1992 RESEARCH PROGRAM: B 2008 SOURCE: U. S. Geological Survey Bulletin, Report: B 2008, 14 pp., 1992 UPDATE CODE: 1992 ---------------------------------------------------------------------------------------------------------- (Reference 148) GEOREF: 1986-060855 CODEN: TEGGAF AUTHOR AFFILIATION: Univ. Calif., Board Earth Sci., Santa Cruz, CA, United States ACCESSION NUMBER: 1987-021432 AUTHORS: Cameron-Kenneth-L; Cameron-Maryellen

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BOOK AUTHORS: Price-Jonathan-G editor; Henry-Christopher-D editor; Parker-Don-F editor; Barker-Daniel-S editor BOOK TITLE: In BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: alkalic-composition; alkaline-earth-metals; Baja-California-Sur-Mexico; calc-alkalic-composition; Cenozoic-; Chihuahua-Mexico; Chinati-Mountains; dacites-; geochemistry-; igneous-rocks; isotopes-; metals-; Mexico-; Nd-144-Nd-143; neodymium-; rare-earths; rhyolites-; Sr-87-Sr-86; stable-isotopes; strontium-; Terlingua-Texas; Texas-; trace-elements; United-States; volcanic-rocks; West-Texas DOCUMENT TYPE: Serial ILLUSTRATION: Refs ISSN: 0363-4132 LANGUAGE: English PUBLISHER: University of Texas at Austin, Bureau of Economic Geology. Austin, TX, United States. 1986. PUBLICATION YEAR: 1986 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Guidebook - Bureau of Economic Geology, University of Texas at Austin. 23; Pages 143-163. 1986. . TITLE: Geochemistry of quartz-normative igneous rocks from the Chinati Mountains and Terlingua areas, West Texas; a comparison with Cenozoic volcanic rocks from Chihuahua and Baja California Sur, Mexico. UPDATE CODE: 1987 ---------------------------------------------------------------------------------------------------------- (Reference 149) GEOREF: 1987-020529 CODEN: GLGYBA COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 26; illus. incl. 2 tables, sketch map PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Pa. State Univ., Dep. Geosci., University Park, PA, United States USA ACCESSION NUMBER: 1987-020529 AUTHORS: Dudas, Francis O; Carlson, Richard W; Eggler, David H COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkaline earth metals; Cenozoic; central Montana; Crazy Mountains; enrichment; geochemistry; igneous rocks; isotopes; lead; mantle; Mesoproterozoic; metals; Montana; Nd-144/Nd-143; neodymium; Park County Montana; Precambrian; Proterozoic; rare earths; ratios; Sr-87/Sr-86; stable isotopes; strontium; Sweet Grass County Montana; Tertiary; trace elements; United States; upper Precambrian ISSN: 0091-7613 LANGUAGE: English PUBLICATION YEAR: 1987 SOURCE: Geology Boulder, vol.15, no.1, pp.22-25, Jan 1987

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TITLE: Regional middle Proterozoic enrichment of the subcontinental mantle source of igneous rocks from central Montana UPDATE CODE: 1987 ---------------------------------------------------------------------------------------------------------- (Reference 150) GEOREF: 1987-021435 CODEN: TEGGAF AUTHOR AFFILIATION: Moncrief Oil, Houston, TX, United States ACCESSION NUMBER: 1987-021435 AUTHORS: Matthews-William-K III; Adams-John-A-S BOOK AUTHORS: Price-Jonathan-G editor; Henry-Christopher-D editor; Parker-Don-F editor; Barker-Daniel-S editor BOOK TITLE: In: Igneous geology of Trans-Pecos Texas; field trip guide and research articles. BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology; 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Cenozoic-; chemical-composition; dates-; dikes-; Finlay-Mountain; geochemistry-; Hudspeth-County-Texas; igneous-rocks; intrusions-; K-Ar; laccoliths-; Paleogene-; petrography-; Rb-Sr; Sierra-Blanca; sills-; Tertiary-; Texas-; trace-elements; United-States DOCUMENT TYPE: Serial ILLUSTRATION: Refs 22; illus. incl. 7 tables, sketch maps. ISSN: 0363-4132 LANGUAGE: English PUBLISHER: University of Texas at Austin, Bureau of Economic Geology. Austin, TX, United States. 1986. PUBLICATION YEAR: 1986 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Guidebook - Bureau of Economic Geology, University of Texas at Austin. 23; Pages 207-224. 1986. . TITLE: Geochemistry, age, and structure of the Sierra Blanca and Finlay Mountain intrusions, Hudspeth County, Texas. UPDATE CODE: 1987 ---------------------------------------------------------------------------------------------------------- (Reference 151) GEOREF: 1987-022197 CODEN: TEGGAF AUTHOR AFFILIATION: Tex. Christian Univ., Dep. Geol., Fort Worth, TX, United States ACCESSION NUMBER: 1987-022197 AUTHORS: Malek-Debra-J; Lambert-David-D BOOK AUTHORS: Price-Jonathan-G editor; Henry-Christopher-D editor; Parker-Don-F editor; Barker-Daniel-S editor BOOK TITLE: In: Igneous geology of Trans-Pecos Texas; field trip guide and research articles.

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BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: alkalic-composition; basalts-; Cenozoic-; dikes-; hypabyssal-rocks; igneous-rocks; intrusions-; major-elements; Oligocene-; Paleogene-; Payne'-s-Waterhole; petrography-; petrology-; plutonic-rocks; sills-; syenites-; Terlingua-Texas; Tertiary-; Texas-; Trans-Pecos; United-States; volcanic-rocks DOCUMENT TYPE: Serial ILLUSTRATION: Refs ISSN: 0363-4132 LANGUAGE: English PUBLISHER: University of Texas at Austin, Bureau of Economic Geology. Austin, TX, United States. 1986. PUBLICATION YEAR: 1986 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Guidebook - Bureau of Economic Geology, University of Texas at Austin. 23; Pages 333-339. 1986. . TITLE: Hypabyssal alkalic intrusions, Payne's Waterhole area, Terlingua, Texas. UPDATE CODE: 1987 ---------------------------------------------------------------------------------------------------------- (Reference 152) GEOREF: 1987-026404 CODEN: BUGMAF COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 52; illus. incl. 5 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N433000,N450000 Longitude:W1090000,W1101500 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Pa. State Univ., Dep. Geosci., University Park, PA, United States USA ACCESSION NUMBER: 1987-026404 AUTHORS: Meen, James K; Eggler, David H COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Absaroka Range; absolute age; alkaline earth metals; Archean; Cretaceous; dates; geochemistry; igneous rocks; Independence region; Independence Volcanic Suite; isotopes; lead; lithophile elements; magmas; major elements; mantle; Mesozoic; metals; Montana; Nd-144/Nd-143; neodymium; North America; petrology; Precambrian; rare earths; ratios; Rb/Sr; Rocky Mountains; southwestern Montana; Sr-87/Sr-86; stable isotopes; strontium; trace elements; U. S. Rocky Mountains; United States; volcanic rocks ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1987 SOURCE: Geological Society of America Bulletin, vol.98, no.2, pp.238-247, Feb 1987 TITLE: Petrology and geochemistry of the Cretaceous Independence Volcanic Suite, Absaroka Mountains, Montana; clues to the composition of the Archean sub-Montanan mantle; with Suppl. Data 87-10 UPDATE CODE: 1987

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---------------------------------------------------------------------------------------------------------- (Reference 153) GEOREF: 1987-061314 ACCESSION NUMBER: 1987-061314 BOOK AUTHORS: Bobeck-Patricia-Ann BOOK TITLE: Igneous petrology and structural geology of Nine Point Mesa, Brewster County, Texas. BIB LEVEL: Monograph CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Aguja-Formation; alkali-basalts; basalts-; Basin-and-Range-Province; Boquillas-Formation; Brewster-County-Texas; Cenozoic-; Cretaceous-; dates-; dip-slip-faults; displacements-; Eocene-; faults-; geochronology-; Gulfian-; hawaiite-; igneous-rocks; intrusions-; K-Ar; laccoliths-; lineaments-; McKinney-Hills; Mesozoic-; Nine-Point-Mesa; North-America; Paleogene-; Pen-Formation; petrology-; plutonic-rocks; Rosillos-Mountains; sills-; syenites-; Tertiary-; Texas-; United-States; Upper-Cretaceous; volcanic-rocks; West-Texas DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: University of Texas, Austin. Austin, TX, United States. Pages DOCUMENT TYPE: Thesis-or-Dissertation ILLUSTRATION: Refs LANGUAGE: English PUBLICATION YEAR: 1985 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1987 ---------------------------------------------------------------------------------------------------------- (Reference 154) GEOREF: 1987-068568 CODEN: XGPPA9 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks,soils, and sediments COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Vallier, Tracy L; Brooks, Howard C FEATURES: References: 79; illus. incl. 3 tables, geol. sketch maps LATITUDE LONGITUDE: Latitude:N454500,N463000 Longitude:W1140000,W1151500 MONOGRAPH TITLE: Geology of the Blue Mountains region of Oregon, Idaho, and Washington;the Idaho Batholith and its border zone PUBLICATION TYPE: Serial; Report; Analytic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States ACCESSION NUMBER: 1987-068568 AUTHORS: Toth, Margo I COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks,soils, and sediments COUNTRY OF PUBLICATION: United States USA

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DESCRIPTORS: batholiths; Bitterroot Lobe; Bitterroot Range; dikes; diorites;geochemistry; Idaho; Idaho Batholith; Idaho County Idaho; igneousrocks; intrusions; major elements; metals; Montana; North America;north-central Idaho; petrology; plutonic rocks; plutons; quartzdiorites; rare earths; Ravalli County Montana; Rocky Mountains;southwestern Montana; tonalite; trace elements; U. S. Rocky Mountains;United States; USGS ISSN: 1044-9612 LANGUAGE: English PUBLICATION YEAR: 1987 RESEARCH PROGRAM: P 1436 SOURCE: U. S. Geological Survey Professional Paper, Report: P 1436, pp.9-35,1987 TITLE: Petrology and origin of the Bitterroot Lobe of the Idaho Batholith UPDATE CODE: 1987 ---------------------------------------------------------------------------------------------------------- (Reference 155) GEOREF: 1987-068575 CODEN: XGPPA9 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments; 03 Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Vallier, Tracy L; Brooks, Howard C FEATURES: References: 65; illus. incl. 140 anal., 2 tables, geol. sketch maps LATITUDE LONGITUDE: Latitude:N432000,N450000 Longitude:W1141000,W1161500 MONOGRAPH TITLE: Geology of the Blue Mountains region of Oregon, Idaho, and Washington; the Idaho Batholith and its border zone PUBLICATION TYPE: Serial; Report; Analytic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States ACCESSION NUMBER: 1987-068575 AUTHORS: Lewis, Reed S; Kiilsgaard, Thor H; Bennett, Earl H; Hall, Wayne E COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments; 03 Geochronology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: absolute age; alkaline earth metals; Atlanta Lobe; batholiths; BoiseCounty Idaho; Cretaceous; Custer County Idaho; dates; diorites; ElmoreCounty Idaho; geochemistry; geochronology; granites; granodiorites;Idaho; Idaho Batholith; igneous rocks; intrusions; isotopes; K/Ar;major elements; Mesozoic; metals; north-central Idaho; petrology;plutonic rocks; plutons; rare earths; Sr-87/Sr-86; stable isotopes;strontium; tonalite; trace elements; United States; USGS; ValleyCounty Idaho ISSN: 1044-9612 LANGUAGE: English PUBLICATION YEAR: 1987 RESEARCH PROGRAM: P 1436 SOURCE: U. S. Geological Survey Professional Paper, Report: P 1436, pp.171-196, 1987 TITLE: Lithologic and chemical characteristics of the central and southeastern part of the southern lobe of the Idaho Batholith UPDATE CODE: 1987 --------------------------------------------------------------------------------

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-------------------------- (Reference 156) GEOREF: 1987-068969 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 83; 5 plates MONOGRAPH TITLE: Petrology and geochemistry of the Magic Reservoir eruptive center,Snake River plain, Idaho ORGANIZATION: Rice University, Houston, TX, United States USA PAGES DATE: 511 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1987-068969 AUTHORS: Honjo, Norio COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkaline earth metals; assimilation; basaltic composition;composition; eruptions; fractionation; Idaho; isotopes; MagicReservoir eruptive center; magmas; metals; mixing; petrology;post-Challis; rhyolitic composition; Snake River plain; southernIdaho; Sr-87/Sr-86; stable isotopes; strontium; United States;volcanism; volcanology LANGUAGE: English PUBLICATION YEAR: 1986 UPDATE CODE: 1987 ---------------------------------------------------------------------------------------------------------- (Reference 157) GEOREF: 1988-001237 CODEN: GSAPAZ AUTHOR AFFILIATION: Tex. Tech Univ., Dep. Geosci., Lubbock, TX, United States ACCESSION NUMBER: 1988-001237 AUTHORS: Hill-Elizabeth; Barnes-Calvin-G BOOK AUTHORS: Morris-Ellen-Mullen editor; Pasteris-Jill-Dill editor BOOK TITLE: In BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology CONFERENCE INFORMATION: Geological Society of America, South-central Section meeting on alkalic rocks and kimberlites. Fayetteville, AK, United States. Apr. 15-16, 1985. COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Aguja-Formation; Big-Bend-National-Park; Brewster-County-Texas; Cenozoic-; clastic-rocks; Cretaceous-; diorites-; Eocene-; gabbros-; genesis-; geochemistry-; Gulfian-; igneous-rocks; intrusions-; megacrysts-; Mesozoic-; mineral-composition; Oligocene-; olivine-gabbro; Paleogene-; petrography-; petrology-; plutonic-rocks; sandstone-; sedimentary-rocks; sills-; Slickrock-Mountain-Complex; syenites-; Tertiary-; Texas-; trace-elements; United-States; Upper-Cretaceous DOCUMENT TYPE: Serial; Conference-Document ILLUSTRATION: Refs ISSN: 0072-1077

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LANGUAGE: English PUBLISHER: Geological Society of America GSA. Boulder, CO, United States. 1987. PUBLICATION YEAR: 1987 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Special Paper - Geological Society of America. 215; Pages 305-316. 1987. . TITLE: Slickrock Mountain intrusive complex, Big Bend National Park, Texas. UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 158) GEOREF: 1988-014652 CODEN: ECGLAL AUTHOR AFFILIATION: Canyon Resour. Corp., Golden, CO, United States ACCESSION NUMBER: 1988-014652 AUTHORS: Beaty-David-W; Naeser-Charles-W; Lynch-William-C BOOK AUTHORS: Anonymous BOOK TITLE: In: Special issue on gold occurrences in Precambrian shield areas. BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits; 02D-Isotope-geochemistry COUNTRY OF PUBLICATION: United-States DESCRIPTORS: C-13-C-12; carbon-; Colorado-; Eagle-County-Colorado; economic-geology; fluid-inclusions; geologic-thermometry; gold-ores; inclusions-; interpretation-; isotopes-; Lake-County-Colorado; metal-ores; mineral-deposits,-genesis; O-18-O-16; oxygen-; ratios-; S DOCUMENT TYPE: Serial ILLUSTRATION: Refs 43; illus. incl. 7 tables, sects., geol. sketch maps. ISSN: 0361-0128 LANGUAGE: English PUBLISHER: Economic Geology Publishing Company. Lancaster, PA, United States. 1987. PUBLICATION YEAR: 1987 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists. 82; 8, Pages 2158-2178. 1987. . TITLE: The origin and significance of the stratabound, carbonate-hosted gold deposits at Tennessee Pass, Colorado. UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 159) GEOREF: 1988-020967 CODEN: CMPEAP AUTHOR AFFILIATION: Sul Ross State Univ., Dep. Geol., Alpine, TX 79832, United States ACCESSION NUMBER: 1988-020967 AUTHORS: Nelson-D-O; Nelson-K-L; Reeves-K-D; Mattison-G-D

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BIB LEVEL: Analytic CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: International DESCRIPTORS: alkalic-composition; Cenozoic-; composition-; geochemistry-; igneous-rocks; lithofacies-; magmas-; magmatic-associations; major-elements; metals-; modal-analysis; plutonic-rocks; rare-earths; Tertiary-; Texas-; trace-elements; Trans-Pecos; United-States; volcanic-rocks DOCUMENT TYPE: Serial ILLUSTRATION: Refs ISSN: 0010-7999 LANGUAGE: English PUBLISHER: Springer International. Heidelberg-New York, International. 1987. PUBLICATION YEAR: 1987 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe, Hanover, Germany SOURCE: Contributions to Mineralogy and Petrology. 97; 1, Pages 72-92. 1987. . TITLE: Geochemistry of Tertiary alkaline rocks of the eastern Trans-Pecos magmatic province, Texas. UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 160) GEOREF: 1988-027845 CODEN: BUGMAF COLLECTION AUTHORS: 16 Structural geology; 03 Geochronology; 12 Stratigraphy COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 57; illus. incl. 2 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N453000,N470000 Longitude:W1100000,W1130000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Oreg. State Univ., United States USA ACCESSION NUMBER: 1988-027845 AUTHORS: Harlan, Steve S; Geissman, John W; Lageson, David R; Snee, Lawrence W COLLECTION AUTHORS: 16 Structural geology; 03 Geochronology; 12 Stratigraphy COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; basins; Broadwater County Montana; Cenozoic; CrazyMountains; Cretaceous; dates; emplacement; faults; fold belts;Gallatin County Montana; geochronology; Helena salient; igneous rocks;intrusions; intrusive rocks; isothermal remanent magnetization;Jefferson County Montana; K/Ar; Laramide Orogeny; Madison CountyMontana; magnetization; Meagher County Montana; Mesozoic; Montana;nepheline syenite; North America; orogeny; Paleocene; Paleogene;paleomagnetism; Park County Montana; plutonic rocks; remanentmagnetization; Rocky Mountains foreland; sills; Silver Bow CountyMontana; southwestern Montana; structural geology; syenites;tectonics; Tertiary; thrust faults; trachytes; United States; UpperCretaceous; volcanic rocks ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1988 SOURCE: Geological Society of America Bulletin, vol.100, no.4, pp.492-499, Apr1988 TITLE: Paleomagnetic and isotopic dating of thrust-belt deformation along

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theeastern edge of the Helena salient, northern Crazy Mountains Basin,Montana UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 161) GEOREF: 1988-053311 CODEN: _NULL_ COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: illus. PUBLICATION TYPE: Book; Monographic SPONSOR: _NULL_ ABSTRACT: _NULL_ AUTHOR AFFILIATION: Calif. State Univ., Geol. Sci. Dep., Northridge, CA, United States USA AUTHORS: Collins, Lorence G COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: Greece GRC DESCRIPTORS: feldspar group; framework silicates; genesis; granites; hydrothermal alteration; igneous rocks; metasomatism; migration of elements; minerals; myrmekite; plagioclase; plutonic rocks; processes; silicates ISSN: _NULL_ LANGUAGE: English PUBLISHER: Theophrastus Publ., Athens, Greece GRC PUBLICATION YEAR: 1988 SOURCE: _NULL_ TITLE: Hydrothermal differentiation and myrmekite; a clue to many geologic puzzles UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 162) GEOREF: 1988-074034 CODEN: XDIGAS COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 9; illus. incl. 9 tables, geol. sketch maps MONOGRAPH TITLE: Tuolumne Meadows Quadrangle, California; analytic data PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: The compositionally and texturally zoned Tuolumne Intrusive Suite occupies most of the Tolumne Meadows Quadrangle. Modal, chemical, and isotopic analyses of plutonic rock samples show that both compositions and initial super 87 Sr- super 86 Sr change systematically inward from the margins of the Tuolumne Intrusive Suite as the rocks become more felsic. AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States AUTHORS: Bateman, Paul C; Chappell, Bruce W; Kistler, Ronald W; Peck, Dallas L; Busacca, Alan J

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COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkaline earth metals California chemical composition Cretaceous east-central California geochemistry igneous rocks intrusive rocks isotopes major elements Mariposa County California Mesozoic metals modal analysis plutonic rocks Sierra Nevada Sr-87/Sr-86 stable isotopes strontium trace elements Tuolumne County California Tuolumne Intrusive Suite Tuolumne Meadows Quadrangle United States Upper Cretaceous USGS ISSN: 8755-531X LANGUAGE: English PUBLISHER: U. S. Geological Survey, Reston, VA, United States USA PUBLICATION YEAR: 1988 RESEARCH PROGRAM: B 1819 SOURCE: U. S. Geological Survey Bulletin, Report: B 1819, 43 pp., 1988 TITLE: Tuolumne Meadows Quadrangle, California; analytic data UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 163) GEOREF: 1989-018838 LATITUDE LONGITUDE: LAT| N360000; N370000; LONG: W1160000; W1170000. ACCESSION NUMBER: 1989-018838 BOOK AUTHORS: Jackson-Mac-Roy Jr. BOOK TITLE: The Timber Mountain magmato-thermal event; an intense widespread culmination of magmatic and hydrothermal activity at the southwestern Nevada volcanic field. BIB LEVEL: Monograph CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: age-; Ammonia-Tanks-Member; Basin-and-Range-Province; Cenozoic-; eruptions-; geochemistry-; hydrothermal-alteration; interpretation-; magmas-; metasomatism-; Miocene-; Neogene-; Nevada-; North-America; Nye-County-Nevada; Oasis-Valley-Caldera; petrology-; Rainier-Mesa-Member; Tertiary-; Timber-Mountain-Caldera; Timber-Mountain-Tuff; United-States; volcanism- DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: University of Nevada. Reno, NV, United States. Pages: 46. 1988. DOCUMENT TYPE: Thesis-or-Dissertation ILLUSTRATION: Refs 97 LANGUAGE: English PUBLICATION YEAR: 1988 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1989 ---------------------------------------------------------------------------------------------------------- (Reference 164) GEOREF: 1989-028342 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02A General

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geochemistry COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. ORGANIZATION: Colorado School of Mines, Golden, CO, United States USA PAGES DATE: 127 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1989-028342 AUTHORS: Musselman, Thomas E COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02A General geochemistry COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; acidic magmas; alkali basalts; alkali metals; alkaline earth metals; basalts; basanite; buffers; carbon dioxide; Ce/Yb; cerium; Colorado; Colorado mineral belt; composition; dates; europium; fluid phase; geochemistry; granites; granodiorites; igneous rocks; isotopes; latite; magmas; mantle; metals; metasomatism; monzonites; Nd-144/Nd-143; neodymium; North America; partial melting; petrology; plutonic rocks; potassium; radioactive isotopes; rare earths; ratios; Rb/Sr; Rocky Mountain alkalic province; Rocky Mountains; samarium; Sm-147/Nd-144; Sr-87/Sr-86; stable isotopes; strontium; syenites; trachyandesites; United States; volcanic rocks; ytterbium LANGUAGE: English PUBLICATION YEAR: 1987 TITLE: A modified crustal source for the Colorado mineral belt; implications for REE buffering in CO sub 2 -rich fluids UPDATE CODE: 1989 ---------------------------------------------------------------------------------------------------------- (Reference 165) GEOREF: 1989-039820 CODEN: XGPPA9 COLLECTION AUTHORS: 13, Areal geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Scale: 1|200,000. Type: colored geologic map FEATURES: References: 161; illus. incl. 4 tables, sketch map LATITUDE LONGITUDE: Latitude:N441500,N444500 Longitude:W1141500,W1144500 MONOGRAPH TITLE: Regional geology and mineral deposits in and near the central part ofthe Lemhi Range, Lemhi County, Idaho PUBLICATION TYPE: Serial; Report; Map; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States ACCESSION NUMBER: 1989-039820 AUTHORS: Ruppel, Edward T; Lopez, David A COLLECTION AUTHORS: 13, Areal geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: areal geology; east-central Idaho; geologic maps; Idaho; Lemhi CountyIdaho; Lemhi Range; maps; mineral resources; United States; USGS ISSN: 1044-9612 LANGUAGE: English PUBLICATION YEAR: 1988 RESEARCH PROGRAM: P 1480 SOURCE: U. S. Geological Survey Professional Paper, Report: P 1480, 122 pp.,1988 UPDATE CODE: 1989

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---------------------------------------------------------------------------------------------------------- (Reference 166) GEOREF: 1989-042168 CODEN: CHGEAD AUTHOR AFFILIATION: U. S. Geol. Surv., Denver, CO, United States ACCESSION NUMBER: 1989-042168 AUTHORS: Barker-F; Sutherland-Brown-A; Budahn-J-R; Plafker-George BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 02C-Geochemistry-of-rocks,-soils,-and-sediments; 18-Solid-earth-geophysics COUNTRY OF PUBLICATION: Netherlands DESCRIPTORS: back-arc-basins; basalts-; basins-; British-Columbia; Canada-; discriminant-analysis; ferrotholeiite-; fore-arc-basins; genesis-; geochemistry-; hybridization-; igneous-rocks; intrusions-; island-arcs; Karmutsen-Group; lava-; least-squares-analysis; magmas-; major-elements; Mesozoic-; metals-; minor-elements; plate-tectonics; Queen-Charlotte-Islands; rare-earths; rifting-; sills-; statistical-analysis; tectonophysics-; trace-elements; Triassic-; Upper-Triassic; Vancouver-Island; volcanic-rocks; volcanism-; volcanology-; Western-Canada; Wrangellia- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 44; illus. incl. 6 tables, geol. sketch map. ISSN: 0009-2541 LANGUAGE: English PUBLISHER: Elsevier. Amsterdam, Netherlands. 1989. PUBLICATION YEAR: 1989 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Chemical Geology. 75; 1-2, Pages 81-102. 1989. TITLE: Back-arc with frontal-arc component origin of Triassic Karmutsen Basalt, British Columbia, Canada. UPDATE CODE: 1989 ---------------------------------------------------------------------------------------------------------- (Reference 167) GEOREF: 1989-042953 CODEN: ISOWAC AUTHOR AFFILIATION: U. S. Geol. Surv., Fed. Cent., Denver, CO, United States ACCESSION NUMBER: 1989-042953 AUTHORS: Marvin-Richard-F; Mehnert-Harald-H; Naeser-Charles-W BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; California-; catalogs-; dates-; geochronology-; Nevada-; United-States DOCUMENT TYPE: Serial ILLUSTRATION: Refs 16; illus. incl. sketch map. ISSN: 0099-6882 LANGUAGE: English PUBLISHER: New Mexico Institute of Mining and Technology. Socorro, NM, United

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States. 1989. PUBLICATION YEAR: 1989 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Isochron/West. 52; Pages 3-12. 1989. TITLE: U. S. Geological Survey radiometric ages; Compilation C, Part three; California and Nevada. UPDATE CODE: 1989 ---------------------------------------------------------------------------------------------------------- (Reference 168) GEOREF: 1989-069615 CODEN: CJESAP LATITUDE LONGITUDE: LAT| N483000; N510000; LONG: W1233000; W1283000. SUMMARY LANGUAGE: French AUTHOR AFFILIATION: Univ. B.C., Dep. Geol. Sci., Vancouver, BC, Canada ACCESSION NUMBER: 1989-069615 AUTHORS: Andrew-Anne; Godwin-Colin-I BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology; 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: Canada DESCRIPTORS: absolute-age; alkaline-earth-metals; Bonanza-Group; British-Columbia; Canada-; galena-; geochemistry-; granites-; granodiorites-; igneous-rocks; island-arcs; Island-Intrusions; isotopes-; Jurassic-; lead-; Mesozoic-; metal-ores; metals-; mineral-deposits,-genesis; Myra-Formation; Paleozoic-; plutonic-rocks; processes-; quartz-monzonite; ratios-; Rb-Sr; Sicker-Group; southwestern-British-Columbia; Sr-87-Sr-86; stable-isotopes; strontium-; sulfides-; upper-Paleozoic; Vancouver-Island; volcanic-rocks; volcanism-; Western-Canada; whole-rock DOCUMENT TYPE: Serial ILLUSTRATION: Refs 54; illus. incl. 5 tables, geol. sketch map. ISSN: 0008-4077 LANGUAGE: English PUBLISHER: National Research Council of Canada. Ottawa, ON, Canada. 1989. PUBLICATION YEAR: 1989 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Canadian Journal of Earth Sciences = Journal Canadien des Sciences de la Terre. 26; 5, Pages 894-907. 1989. TITLE: Lead- and strontium-isotope geochemistry of Paleozoic Sicker Group and Jurassic Bonanza Group volcanic rocks and Island Intrusions, Vancouver Island, British Columbia. UPDATE CODE: 1989 ---------------------------------------------------------------------------------------------------------- (Reference 169) GEOREF: 1989-069616 CODEN: CJESAP LATITUDE LONGITUDE: LAT| N483000; N510000; LONG: W1233000; W1283000. SUMMARY LANGUAGE: French

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AUTHOR AFFILIATION: Univ. B.C., Dep. Geol. Sci., Vancouver, BC, Canada ACCESSION NUMBER: 1989-069616 AUTHORS: Andrew-Anne; Godwin-Colin-I BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: Canada DESCRIPTORS: absolute-age; alkaline-earth-metals; basalts-; British-Columbia; Canada-; galena-; geochemistry-; igneous-rocks; isotopes-; Karmutsen-Group; lava-; lead-; magmas-; mantle-; Mesozoic-; metals-; pollution-; ratios-; Rb-Sr; southwestern-British-Columbia; Sr-87-Sr-86; stable-isotopes; strontium-; sulfides-; Triassic-; Upper-Triassic; Vancouver-Island; volcanic-rocks; Western-Canada DOCUMENT TYPE: Serial ILLUSTRATION: Refs 36; illus. incl. 5 tables, geol. sketch map. ISSN: 0008-4077 LANGUAGE: English PUBLISHER: National Research Council of Canada. Ottawa, ON, Canada. 1989. PUBLICATION YEAR: 1989 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Canadian Journal of Earth Sciences = Journal Canadien des Sciences de la Terre. 26; 5, Pages 908-919. 1989. TITLE: Lead- and strontium-isotope geochemistry of the Karmutsen Formation, Vancouver Island, British Columbia. UPDATE CODE: 1989 ---------------------------------------------------------------------------------------------------------- (Reference 170) GEOREF: 1989-070943 ACCESSION NUMBER: 1989-070943 BOOK AUTHORS: Lewis-Paul-S BOOK TITLE: Igneous petrology and strontium isotope geochemistry of the Christmas Mountains, Brewster County, Texas. BIB LEVEL: Monograph CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: alkaline-earth-metals; Brewster-County-Texas; Christmas-Mountains; geochemistry-; igneous-rocks; isotopes-; metals-; petrology-; Sr-87-Sr-86; stable-isotopes; strontium-; Texas-; United-States; West-Texas DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: University of Texas, Austin. Austin, TX, United States. 1978. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1978 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1989 ---------------------------------------------------------------------------------------------------------- (Reference 171)

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GEOREF: 1989-073462 CODEN: GSASBB COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Ross, J; Jaques, A L; Ferguson, J; Green, D H; O'Reilly, S Y; Danchin, R V; Janse, A J A FEATURES: References: 27; illus. incl. 2 tables, geol. sketch map MONOGRAPH TITLE: Kimberlites and related rocks PUBLICATION TYPE: Serial; Conference document; Analytic AUTHOR AFFILIATION: Geol. Soc. Aust., AUS, Australia ACCESSION NUMBER: 1989-073462 AUTHORS: Hearn, B Carter, Jr COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology CONFERENCE INFORMATION: Fourth international kimberlite conference, Perth, West. Aust., Australia, Aug. 11-15, 1986 COUNTRY OF PUBLICATION: Australia AUS DESCRIPTORS: alkalic composition; alnoite; carbonatites; genesis; igneous rocks; kimberlite; lamprophyres; mineral composition; Montana; monticellite; nesosilicates; north-central Montana; olivine group; orthosilicates; peridotites; petrology; plutonic rocks; silicates; ultramafics; United States ISBN: 0867933844|0867930330 ISSN: 0072-1085 LANGUAGE: English PUBLICATION YEAR: 1989 SOURCE: Special Publication - Geological Society of Australia, vol.14, no.2, pp.109-119, 1989 TITLE: Alkalic ultramafic magmas in north-central Montana, USA; genetic connections of alnoite, kimberlite, and carbonatite UPDATE CODE: 1989 ---------------------------------------------------------------------------------------------------------- (Reference 172) GEOREF: 1989-077978 ACCESSION NUMBER: 1989-077978 BOOK AUTHORS: Stevens-Richard-K BOOK TITLE: Igneous petrology of Paisano Mine area, Brewster County, Texas. BIB LEVEL: Monograph CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Brewster-County-Texas; igneous-rocks; Paisano-Mine; petrology-; Texas-; United-States DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: West Texas State University. Canyon, TX, United States. 1974. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1974 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1989 ----------------------------------------------------------------------------------------------------------

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(Reference 173) GEOREF: 1989-080364 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Geology of the Challis volcanic rocks near Basin Creek, Idaho ORGANIZATION: University of Oregon, Eugene, OR, United States USA PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1989-080364 AUTHORS: Leavitt, James Douglas COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Basin Creek; Cenozoic; Challis Volcanics; Idaho; igneous rocks;petrology; Tertiary; United States; volcanic rocks PUBLICATION YEAR: 1980 UPDATE CODE: 1989 ---------------------------------------------------------------------------------------------------------- (Reference 174) GEOREF: 1989-080946 CODEN: ISOWAC COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 14; illus. incl. 1 table PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. N.M., Dep. Geol., Albuquerque, NM, United States USA ACCESSION NUMBER: 1989-080946 AUTHORS: Erskine, Daniel W; Brookins, Douglas G; Kudo, Albert M; Ward, David B COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Absaroka Field; absolute age; basalts; Cretaceous; dates; dikes;geochronology; igneous rocks; intrusions; Mesozoic; Rb/Sr; shoshonite;United States; volcanic rocks; Wyoming ISSN: 0099-6882 LANGUAGE: English PUBLICATION YEAR: 1989 SOURCE: Isochron/West, vol.54, pp.21-24, Sep 1989 TITLE: Rb-Sr age of shoshonitic dikes in the Crandall-Sunlight region,Absaroka volcanic field, Wyoming UPDATE CODE: 1989 ---------------------------------------------------------------------------------------------------------- (Reference 175) GEOREF: 1990-006689 CODEN: JGEOAZ AUTHOR AFFILIATION: Va. Mus. Nat. Hist., Martinsville, VA, United States ACCESSION NUMBER: 1990-006689 AUTHORS: Beard-James-S; Barker-Fred

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BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 02C-Geochemistry-of-rocks,-soils,-and-sediments; 18-Solid-earth-geophysics COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Alaska-; Alaska-Range; anorthosite-; basalts-; dates-; differentiation-; diorites-; fractional-crystallization; gabbros-; geochemistry-; igneous-rocks; intrusions-; island-arcs; magmas-; major-elements; nesosilicates-; Nikolai-Greenstone; orthosilicates-; Paleozoic-; petrology-; plate-collision; plate-tectonics; plutonic-rocks; plutons-; shoshonite-; silicates-; Skolai-Group; Slana-Alaska; southern-Alaska; tectonostratigraphic-units; terranes-; Tetelna-Formation; tonalite-; trace-elements; U-Pb; U-Th-Pb; United-States; upper-Paleozoic; volcanic-rocks; volcanism-; Wrangellia-; zircon- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 74; illus. incl. 3 tables, geol. sketch map. ISSN: 0022-1376 LANGUAGE: English PUBLISHER: University of Chicago Press. Chicago, IL, United States. 1989. PUBLICATION YEAR: 1989 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Journal of Geology. 97; 6, Pages 667-683. 1989. TITLE: Petrology and tectonic significance of gabbros, tonalites, shoshonites, and anorthosites in a late Paleozoic arc-root complex in the Wrangellia Terrane, southern Alaska. UPDATE CODE: 1990 ---------------------------------------------------------------------------------------------------------- (Reference 176) GEOREF: 1996-061545 CODEN: CSMQDN COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 16 Structural geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Drexler, John W; Larson, Edwin E FEATURES: References: 257; illus. incl. 2 tables, geol. sketch maps MONOGRAPH TITLE: Cenozoic volcanism in the Southern Rocky Mountains updated; a tribute to Rudy C. Epis; Part 1 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: University of Colorado, Department of Geological Sciences, Boulder, CO, United States USA ACCESSION NUMBER: 1996-061545 AUTHORS: Mutschler, Felix E; Larson, Edwin E; Bruce, Robert M COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 16 Structural geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Cenozoic; chemical composition; Colorado; evolution; igneous activity; igneous rocks; Laramide Orogeny; magmas; major elements; mechanism; orogeny; rift zones; Tertiary; United States ISSN: 0163-9153 LANGUAGE: English SOURCE: Colorado School of Mines Quarterly, vol.82, no.4, pp.1-47, 1987 TITLE: Laramide and younger magmatism in Colorado; new petrologic and tectonic variations on old themes UPDATE CODE: 199620

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---------------------------------------------------------------------------------------------------------- (Reference 177) GEOREF: 1996-065954 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 50; illus. MONOGRAPH TITLE: Petrology of a mafic intrusive suite in the central Sierra Nevada Batholith, California ORGANIZATION: University of North Carolina, Chapel Hill, Chapel Hill, NC, United States USA PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ABSTRACT: Mafic magmas supply heat and mass in the generation of silicic batholiths such as the Sierra Nevada batholith, but mafic rocks are uncommonly exposed and poorly studied. Field studies of mafic intrusive suites exposed along the eastern escarpment of the Sierra Nevada, between Big Pine and Independence, show that mafic magmatism is commonly expressed as thick suites of sills which intruded contemporaneously with silicic magma. The most striking of these suites is the Aberdeen intrusive suite which is composed of subhorizontal diorite sills with over 2 km of vertical exposure. Mafic/felsic interaction and magma mingling textures are observed from hand specimen scale to mountain-scale interdigitation of magma types. Isotopic study indicates that these chemically distinct magmas evolved from a similar source and that the mafic source of these magmas may not be depleted mantle as previously speculated, but an enriched lithospheric mantle AUTHORS: Bradford, Kevin John COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Aberdeen Intrusion; California; genesis; geochemistry; igneous rocks; intrusions; isotopes; mafic composition; magmas; petrography; Sierra Nevada Batholith; sills; United States LANGUAGE: English PUBLICATION YEAR: 1995 UPDATE CODE: 199620 ---------------------------------------------------------------------------------------------------------- (Reference 178) GEOREF: 1996-900001 (unpublished Georef; Navdat only) PUBLICATION TYPE: Master's Thesis AUTHOR AFFILIATION: University of Washington ACCESSION NUMBER: 1996-900001 AUTHORS: Steve Macias PUBLICATION YEAR: 1996 TITLE: The Sonora Intrusive Suite: Constraints on the assembly of a Late Cretaceous, concentrically-zoned granitic pluton of the Sierra Nevada batholith. ----------------------------------------------------------------------------------------------------------

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(Reference 179) GEOREF: 1997-037958 LATITUDE LONGITUDE: LAT| N364400; N370000; LONG: W1162500; W1163500. ACCESSION NUMBER: 1997-037958 AVAILABILITY: University Microfilms, Ann Arbor, MI, United States BOOK AUTHORS: Weiss-Steven-Ira BOOK TITLE: Hydrothermal activity, epithermal mineralization and regional extension in the Southwestern Nevada volcanic field. BIB LEVEL: Monograph CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: calderas-; Cenozoic-; decarbonatization-; disseminated-deposits; epithermal-processes; extension-tectonics; faults-; fractures-; gold-ores; host-rocks; hydrothermal-conditions; igneous-rocks; low-angle-faults; matrix-; metal-ores; metals-; middle-Miocene; mineral-deposits,-genesis; mineralization-; Miocene-; Neogene-; Nevada-; normal-faults; Nye-County-Nevada; ore-forming-fluids; Original-Bullfrog-Fluorspar-Canyon-fault-system; precious-metals; sedimentary-rocks; silver-ores; Southwestern-Nevada-volcanic-field; tectonics-; Tertiary-; tilt-; Timber-Mountain; United-States; upper-Miocene; volcanic-features; volcanism-; Yucca-Mountain DEGREE GRANTED: Doctoral DEGREE GRANTING INSTITUTION: University of Nevada - Mackay School of Mines. Reno, NV, United States. Pages: 212. 1996. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1996 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 199713 ---------------------------------------------------------------------------------------------------------- (Reference 180) GEOREF: 1997-045609 CODEN: WTGPAA ACCESSION NUMBER: 1997-045609 AUTHORS: Henry-Christopher-D; Muehlberger-William-R; McCormick-C-Larry; Davis-Linda-L; Erdlac-Richard-J; Kunk-Michael-J; Smith-C-I BOOK AUTHORS: Laroche-T-Matthew editor; Viveiros-J-J editor BOOK TITLE: In: Structure and tectonics of the Big Bend and southern Permian Basin, Texas; West Texas Geological Society 1994 field trip guidebook BIB LEVEL: Analytic CATEGORY CODES: 16-Structural-geology; 12-Stratigraphy COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Ar-40-Ar-39; argon-; Basin-and-Range-Province; block-structures; calderas-; Cenozoic-; dates-; faults-; igneous-activity; igneous-rocks; intrusions-; isotope-ratios; isotopes-; laccoliths-; lithofacies-; magmas-; Mesozoic-; noble-gases; North-America; Ouachita-Orogeny; Paleozoic-; radioactive-isotopes; sedimentary-rocks; sedimentation-; Solitario-Dome; stable-isotopes; systems-; tectonics-; Texas-; Trans-Pecos; United-States; volcanic-features; volcanic-rocks; West-Texas DOCUMENT TYPE: Abstract; Serial ISSN: 0099-9040 LANGUAGE: English PUBLISHER: West Texas Geological Society. Midland, TX, United States. 1994.

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PUBLICATION YEAR: 1994 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Publication - West Texas Geological Society. 94-95; Pages 163-164. 1994. . TITLE: Geology of the Solitario Dome, Trans-Pecos Texas; Paleozoic, Mesozoic, and Cenozoic sedimentation, tectonism, and magmatism. UPDATE CODE: 199716 ---------------------------------------------------------------------------------------------------------- (Reference 181) GEOREF: 1997-055687 CODEN: CMPEAP COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 88; illus. incl. sects., 7 tables, geol. sketch maps PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: U. S. Geological Survey, Menlo Park, CA, United States USA; Massachusetts Institute of Technology, United States USA AUTHORS: Sisson, T W; Grove, T L; Coleman, D S COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COUNTRY OF PUBLICATION: International III DESCRIPTORS: alkaline earth metals basaltic composition California chemical composition Cretaceous cumulates diorites gabbros hornblende gabbro igneous rocks intrusions isotopes lead mafic composition magmas melts Mesozoic metals Nd-144/Nd-143 neodymium Onion Valley Pb-208/Pb-204 petrology plutonic rocks plutons radioactive isotopes rare earths Sierra Nevada Batholith sills Sr-87/Sr-86 stable isotopes strontium trace elements United States whole rock ISSN: 0010-7999 LANGUAGE: English PUBLICATION YEAR: 1996 SOURCE: Contributions to Mineralogy and Petrology, vol.126, no.1-2, pp.81-108, Dec 1996 TITLE: Hornblende gabbro sill complex at Onion Valley, California, and a mixing origin for the Sierra Nevada Batholith UPDATE CODE: 199718 ---------------------------------------------------------------------------------------------------------- (Reference 182) GEOREF: 1998-005100 CODEN: ECGLAL AUTHOR AFFILIATION: New Mexico Institute of Mining and Technology, Department of Earth and Environmental Sciences, Socorro, NM, United States ACCESSION NUMBER: 1998-005100 AUTHORS: Groff-John-A; Heizler-Matthew-T; McIntosh-William-C; Norman-David-I BIB LEVEL: Analytic

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CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits; 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; adularia-; alkali-feldspar; Ar-Ar; biotite-; breccia-pipes; carlin-type-deposits; Cenozoic-; cores-; Cretaceous-; cuttings-; dates-; diffusion-; dikes-; electron-probe-data; Eocene-; feldspar-group; framework-silicates; Getchell-Mine; Getchell-Trend; gold-ores; Humboldt-County-Nevada; intrusions-; K-feldspar; kinetics-; Mesozoic-; metal-ores; metamorphic-rocks; metasomatic-rocks; mica-group; mineral-assemblages; mineralization-; mines-; Nevada-; ore-bodies; Osgood-Mountains; Paleocene-; Paleogene-; paragenesis-; pipes-; sample-preparation; sericite-; sheet-silicates; silicates-; skarn-; Tertiary-; thermal-history; thermochronology-; Twin-Creeks-Mine; United-States; Upper-Cretaceous; zoning- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 52; illus. incl. sects., 4 tables, sketch maps. ISSN: 0361-0128 LANGUAGE: English PUBLISHER: Economic Geology Publishing Company. Lancaster, PA, United States. 1997. PUBLICATION YEAR: 1997 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists. 92; 5, Pages 601-622. 1997. TITLE: super 40 Ar/ super 39 Ar dating and mineral paragenesis for carlin-type gold deposits along the Getchell Trend, Nevada; evidence for Cretaceous and Tertiary gold mineralization. UPDATE CODE: 199802 ---------------------------------------------------------------------------------------------------------- (Reference 183) GEOREF: 1998-021072 CODEN: TCTNDM COLLECTION AUTHORS: 16, Structural geology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. FEATURES: References: 52; illus. incl. sects., strat. cols., 1 table, geol. sketch map LATITUDE LONGITUDE: Latitude:N282000,N284000 Longitude:W1090500,W1092000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: University of California at Santa Barbara, Department of Geological Sciences, Santa Barbara, CA, United States USA ACCESSION NUMBER: 1998-021072 AUTHORS: Gans, P B COLLECTION AUTHORS: 16, Structural geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: angular unconformities; Cenozoic; extension tectonics; faults; intrusions; lithostratigraphy; magmatism; Mexico; Miocene; Neogene; normal faults; Oligocene; Paleogene; paleogeography; reconstruction; Sonora Mexico; tectonics; Tertiary; unconformities ISSN: 0278-7407 LANGUAGE: English PUBLISHER: American Geophysical Union, Washington, DC, United States USA PUBLICATION YEAR: 1997 SOURCE: Tectonics, vol.16, no.3, pp.388-408, Jun 1997 TITLE: Large-magnitude Oligo-Miocene extension in southern Sonora; implications

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for the tectonic evolution of Northwest Mexico UPDATE CODE: 1998 ---------------------------------------------------------------------------------------------------------- (Reference 184) GEOREF: 1998-028056 LATITUDE LONGITUDE: LAT| N290000; N294200; LONG: W1025000; W1034500. ABSTRACT: The Tertiary Chisos Formation, located in the eastern alkalic belt, Trans-Pecos magmatic province is divided into the Alamo Creek Basalt, Ash Spring Basalt, Bee Mountain Basalt, Mule Ear Spring Tuff, and Tule Mountain Trachyandesite. Major and trace element modeling, combined with petrographic and field evidence suggest a complex petrogenesis. Varying degrees of partial melting of a metasomatically veined mantle produced compositionally different enriched primary liquids. Varying evolutionary paths of these liquids, caused by fractionation, assimilation, and replenishment, have given rise to chemically independent magmas and evolved products. Several distinct chemical groupings exist within the Chisos Formation. Additionally, some Alamo Creek samples are chemically similar to Ash Spring samples, suggesting a replication of magmatic processes through time. K-Ar age determinations indicate that the Ash Spring Basalt had a long eruption period 34-43 ma, or several Alamo Creek outcrops were previously incorrectly mapped as Ash Spring Basalt. ACCESSION NUMBER: 1998-028056 BOOK AUTHORS: Schucker-Dennis-E BOOK TITLE: Geochemistry and petrogenesis of the mafic flow units within the Chisos Formation, Big Bend National Park, Texas. BIB LEVEL: Monograph CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 02C-Geochemistry-of-rocks,-soils,-and-sediments COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Alamo-Creek-Basalt; Ash-Spring-Basalt; basalts-; Bee-Mountain-Basalt; Big-Bend-National-Park; Brewster-County-Texas; Cenozoic-; Chisos-Formation; genesis-; geochemistry-; igneous-rocks; mafic-composition; major-elements; metasomatism-; Mule-Ear-Spring-Tuff; partial-melting; petrography-; pyroclastics-; Tertiary-; Texas-; trace-elements; trachyandesites-; Trans-Pecos; tuff-; Tule-Mountain-Trachyandesite; United-States; volcanic-rocks DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: Sul Ross State University. Alpine, TX, United States. Pages: 206. 1986. DOCUMENT TYPE: Thesis-or-Dissertation ILLUSTRATION: Refs LANGUAGE: English PUBLICATION YEAR: 1986 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 199811 ---------------------------------------------------------------------------------------------------------- (Reference 185) GEOREF: 1998-039121 LATITUDE LONGITUDE: LAT| N400700; N420000; LONG: W1140500; W1170000.

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AUTHOR AFFILIATION: University of Nevada, Reno, Mackay School of Mines, Reno, NV, United States ACCESSION NUMBER: 1998-039121 AUTHORS: Phinisey-J-D; Hofstra-A-H; Snee-L-W; Roberts-T-T; Dahl-A-R; Loranger-R-J BOOK AUTHORS: Coyner-Alan-R editor; Fahey-Patrick-L editor BOOK TITLE: In: Geology and ore deposits of the American Cordillera; symposium proceedings. BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits CONFERENCE INFORMATION: Geology and ore deposits of the American Cordillera. Reno, NV, United States. Apr. 10-13, 1995. COUNTRY OF PUBLICATION: United-States DESCRIPTORS: carbonaceous-composition; Elko-County-Nevada; gold-ores; Hanson-Creek-Formation; hydrothermal-alteration; igneous-activity; Independence-Range; Jerritt-Canyon-mining-district; Lower-Silurian; metal-ores; metasomatism-; Middle-Ordovician; Middle-Silurian; mineral-deposits,-genesis; mineralization-; Nevada-; Ordovician-; Paleozoic-; Roberts-Mountains-Formation; Silurian-; United-States DOCUMENT TYPE: Book; Conference-Document ISBN: 1-889824-00-3 ILLUSTRATION: Refs 37; illus. incl. 3 tables, geol. sketch maps. LANGUAGE: English PUBLISHER: Geological Society of Nevada. Reno, NV, United States. 1995. PUBLICATION YEAR: 1995 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Pages 15-39. 1995. TITLE: Evidence for multiple episodes of igneous and hydrothermal activity and constraints on the timing of gold mineralization, Jerritt Canyon District, Elko County, Nevada. UPDATE CODE: 199816 ---------------------------------------------------------------------------------------------------------- (Reference 186) GEOREF: 1998-039129 LATITUDE LONGITUDE: LAT| N390700; N420000; LONG: W1191000; W1200000. AUTHOR AFFILIATION: Western Mining, Reno, NV, United States ACCESSION NUMBER: 1998-039129 AUTHORS: Bussey-Steven-D BOOK AUTHORS: Coyner-Alan-R editor; Fahey-Patrick-L editor BOOK TITLE: In: Geology and ore deposits of the American Cordillera; symposium proceedings. BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits CONFERENCE INFORMATION: Geology and ore deposits of the American Cordillera. Reno, NV, United States. Apr. 10-13, 1995. COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Bell-Springs-Deposit; East-Pit; Geib-Deposit; gold-ores; Hog-Ranch-mining-district; igneous-rocks; Krista-Deposit; metal-ores; mineral-exploration; Nevada-; northwestern-Nevada; rhyolites-; United-States; volcanic-rocks; volcaniclastics-; Washoe-County-Nevada; White-Mountain-Deposit DOCUMENT TYPE: Book; Conference-Document

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ISBN: 1-889824-00-3 ILLUSTRATION: Refs 28; illus. incl. 3 tables, geol. sketch maps. LANGUAGE: English PUBLISHER: Geological Society of Nevada. Reno, NV, United States. 1995. PUBLICATION YEAR: 1995 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Pages 181-207. 1995. TITLE: Gold mineralization and associated rhyolitic volcanism at the Hog Ranch District, Northwest Nevada. UPDATE CODE: 199816 ---------------------------------------------------------------------------------------------------------- (Reference 187) GEOREF: 1998-039142 LATITUDE LONGITUDE: LAT| N384000; N401000; LONG: W1140500; W1155500. AUTHOR AFFILIATION: Placer Dome, Bald Mountain Mine, Elko, NV, United States ACCESSION NUMBER: 1998-039142 AUTHORS: Hitchborn-Alan-D; Arbonies-David-G; Peters-Stephen-G; Connors-Katherine-A; Noble-Donald-C; Larson-Lawrence-T; Beebe-Jared-S; McKee-Edwin-H BOOK AUTHORS: Coyner-Alan-R editor; Fahey-Patrick-L editor BOOK TITLE: In: Geology and ore deposits of the American Cordillera; symposium proceedings. BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits CONFERENCE INFORMATION: Geology and ore deposits of the American Cordillera. Reno, NV, United States. Apr. 10-13, 1995. COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Antelope-Valley-Limestone; Battle-Mountain-mining-district; carlin-type-deposits; clastic-rocks; conglomerate-; gold-ores; metal-ores; mining-; mining-geology; Nevada-; Paleozoic-; production-; sedimentary-rocks; United-States; White-Pine-County-Nevada DOCUMENT TYPE: Book; Conference-Document ISBN: 1-889824-00-3 ILLUSTRATION: Refs 105; illus. incl. 5 tables, geol. sketch maps. LANGUAGE: English PUBLISHER: Geological Society of Nevada. Reno, NV, United States. 1995. PUBLICATION YEAR: 1995 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Pages 505-546. 1995. TITLE: Geology and gold deposits of the Bald Mountain mining district, White Pine County, Nevada. UPDATE CODE: 199816 ---------------------------------------------------------------------------------------------------------- (Reference 188) GEOREF: 2000-064719 COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute.

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MONOGRAPH TITLE: super 40 Ar/ super 39 Ar ages of Eocene dikes and the age ofextension in a Tertiary magmatic arc, Idaho and Montana ORGANIZATION: University of Montana, Missoula, MT, United States USA PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 2000-064719 AUTHORS: Simonsen, Steen W COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Ar/Ar; Bitterroot Complex; Cenozoic; Challis Volcanics;dates; dike swarms; dikes; Eocene; extension; Idaho; Idaho Batholith;Idaho porphyry belt; Idaho-Montana extensional belt; intrusions;magmatism; Montana; Paleogene; Salmon River Arch; Tertiary; UnitedStates LANGUAGE: English PUBLICATION YEAR: 1997 UPDATE CODE: 2000 ---------------------------------------------------------------------------------------------------------- (Reference 189) GEOREF: 2000-075463 CODEN: BUGMAF LATITUDE LONGITUDE: LAT| N314500; N323500; LONG: W1072000; W1081500. LAT| N314500; N330500; LONG: W1062200; W1072000. AUTHOR AFFILIATION: New Mexico State University, Department of Geological Sciences, Las Cruces, NM, United States ACCESSION NUMBER: 2000-075463 AUTHORS: McMillan-Nancy-J; Dickin-Alan-P; Haag-David BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: alkali-basalts; alkaline-earth-metals; basalts-; Bell-Top-Formation; Cenozoic-; continental-crust; crust-; Dona-Ana-County-New-Mexico; geochemistry-; half-grabens; igneous-rocks; isotope-ratios; isotopes-; lead-; lithogeochemistry-; Luna-County-New-Mexico; mafic-composition; magmas-; magmatism-; metals-; Nd-144-Nd-143; neodymium-; New-Mexico; North-America; Pb-206-Pb-204; Pb-207-Pb-204; Pb-208-Pb-204; plate-tectonics; radioactive-isotopes; rare-earths; rift-zones; Rio-Grande-Rift; Rubio-Peak-Formation; southern-New-Mexico; Sr-87-Sr-86; stable-isotopes; strontium-; subduction-; tectonics-; trace-elements; United-States; Uvas-volcanic-field; volcanic-fields; volcanic-rocks; volcanism- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 58; illus. incl. 3 tables, geol. sketch map. ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America GSA. Boulder, CO, United States. 2000. PUBLICATION YEAR: 2000 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States SOURCE: Geological Society of America Bulletin. 112; 10, Pages 1582-1593. 2000. . TITLE: Evolution of magma source regions in the Rio Grande Rift, southern New Mexico.

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UPDATE CODE: 200024 ---------------------------------------------------------------------------------------------------------- (Reference 190) GEOREF: 2000-900016 (unpublished Georef; Navdat only) AUTHORS: Ressel-M-W PUBLICATION YEAR: 2000 TITLE: Gold-mineralized Eocene dikes at Griffin and Meikle: Bearing on the age and origin of deposits of the Carlin trend, Nevada ---------------------------------------------------------------------------------------------------------- (Reference 191) GEOREF: 2001-007879 CODEN: ECGLAL LATITUDE LONGITUDE: LAT| N391000; N410000; LONG: W1163500; W1174500. AUTHOR AFFILIATION: University of Michigan, Department of Geological Sciences, Ann Arbor, MI, United States ACCESSION NUMBER: 2001-007879 AUTHORS: Hall-C-M; Kesler-Stephen-E; Simon-Grigore; Fortuna-John BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: adularia-; alkali-feldspar; Basin-and-Range-Province; carlin-type-deposits; Cenozoic-; clay-minerals; Cretaceous-; Eocene-; feldspar-group; framework-silicates; geochemical-methods; gold-ores; hydrothermal-alteration; illite-; Lander-County-Nevada; Mesozoic-; metal-ores; metasomatism-; mineral-deposits,-genesis; mineral-exploration; Nevada-; North-America; Paleogene-; sheet-silicates; silicates-; Tertiary-; Twin-Creeks-Deposit; Twin-Creeks-Nevada; United-States DOCUMENT TYPE: Serial ILLUSTRATION: Refs 30; illus. incl. sects., 1 table, geol. sketch map. ISSN: 0361-0128 LANGUAGE: English PUBLISHER: Economic Geology Publishing Company. Lancaster, PA, United States. 2000. PUBLICATION YEAR: 2000 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists. 95; 8, Pages 1739-1752. 2000. TITLE: Overlapping Cretaceous and Eocene alteration, Twin Creeks carlin-type deposit, Nevada. UPDATE CODE: 200103 ---------------------------------------------------------------------------------------------------------- (Reference 192)

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GEOREF: 2002-027716 CODEN: JGEOAZ LATITUDE LONGITUDE: LAT| N414000; N415500; LONG: W1152000; W1154000. ABSTRACT: New mapping, structural analysis, and super 40 Ar/ super 39 Ar dating reveal an unusually well-constrained history of Late Eocene extension in the Copper Mountains of the northern Basin and Range province. In this area, the northeast-trending Copper Creek normal fault juxtaposes a distinctive sequence of metacarbonate and granitoid rocks against a footwall of Upper Precambrian to Lower Cambrian quartzite and phyllite. Correlation of the hanging wall with footwall rocks to the northwest provides an approximate piercing point that requires 8-12 km displacement in an ESE direction. This displaced fault slice is itself bounded above by another normal fault the Meadow Fork Fault, which brings down a hanging wall of dacitic to rhyolitic tuff that grades conformably upward into conglomerate. These relationships record the formation of a fault-bounded basin between 41.3 and 37.4 Ma. The results are consistent with a regional pattern in which volcanism and extension swept southward from British Columbia to southern Nevada from Early Eocene to Late Oligocene time. Because the southward sweep of volcanism is thought to track the steepening and foundering of the downgoing oceanic plate, these results suggest that the crucial mechanisms for the onset of regional extension were probably changes in plate boundary conditions coupled with convective removal of mantle lithosphere and associated regional magmatism and lithospheric weakening. Paleobotanical data indicate that surface elevations in northeastern Nevada were not significantly different than at present, suggesting that gravitational instability of overthickened continental crust was not the dominant force driving the onset of crustal thinning in mid-Tertiary time. AUTHOR AFFILIATION: University of Dayton, Department of Geology, Dayton, OH, United States ACCESSION NUMBER: 2002-027716 AUTHORS: Rahl-Jeffrey-M; McGrew-Allen-J; Foland-Kenneth-A BIB LEVEL: Analytic CATEGORY CODES: 16-Structural-geology; 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; amphibole-group; Ar-Ar; Basin-and-Range-Province; basin-range-structure; biotite-; Cenozoic-; chain-silicates; clinoamphibole-; continental-crust; contraction-; Copper-Mountains; crust-; crustal-thinning; dates-; displacements-; Elko-County-Nevada; Eocene-; extension-; faults-; foot-wall; hanging-wall; hornblende-; igneous-rocks; magmatism-; mica-group; Nevada-; normal-faults; North-America; Paleogene-; plate-boundaries; plate-tectonics; sedimentary-rocks; Sevier-orogenic-belt; sheet-silicates; silicates-; structural-analysis; syntectonic-processes; tectonics-; Tertiary-; transition-zones; United-States; upper-Eocene; volcanic-rocks; volcanism- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 59; illus. incl. 1 table, geol. sketch map. ISSN: 0022-1376 LANGUAGE: English PUBLISHER: University of Chicago Press. Chicago, IL, United States. 2002. PUBLICATION YEAR: 2002 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Journal of Geology. 110; 2, Pages 179-194. 2002. TITLE: Transition from contraction to extension in the northeastern Basin and Range; new evidence from the Copper Mountains, Nevada. UPDATE CODE: 200210 ----------------------------------------------------------------------------------------------------------

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(Reference 193) GEOREF: 2002-038307 CODEN: JPTGAD COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 03 Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 138; illus. incl. 8 tables, geol. sketch maps PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Montana State University, Department of Earth Sciences, Bozeman, MT, United States USA, University of Lausanne, Switzerland CHE ACCESSION NUMBER: 2002-038307 AUTHORS: Feeley, T C; Cosca, M A; Lindsay, C R COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 03 Geochronology COUNTRY OF PUBLICATION: United Kingdom GBR DESCRIPTORS: Absaroka Volcanic Province; absolute age; Ar/Ar; calc-alkalic composition; Cenozoic; dates; Eocene; facies; fractional crystallization; granulite facies; hybridization; inclusions; magmas; Paleogene; Tertiary; United States; volcanoes; Washburn; xenoliths; Yellowstone National Park ISSN: 0022-3530 LANGUAGE: English PUBLISHER: Oxford University Press, Oxford, United Kingdom GBR PUBLICATION YEAR: 2002 SOURCE: Journal of Petrology, vol.43, no.4, pp.663-703, Apr 2002 TITLE: Petrogenesis and implications of calc-alkaline cryptic hybrid magmas from Washburn Volcano, Absaroka Volcanic Province, USA UPDATE CODE: 200213 ---------------------------------------------------------------------------------------------------------- (Reference 194) GEOREF: 2002-041567 LATITUDE LONGITUDE: LAT| N350000; N420000; LONG: W1140500; W1200000. ACCESSION NUMBER: 2002-041567 BOOK AUTHORS: Ressel-Michael-Walter Jr. BOOK TITLE: A transitional basaltic center in west-central Nevada; petrochemistry and constraints on regional middle Miocene magmatism and tectonism. BIB LEVEL: Monograph CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: basalts-; Basin-and-Range-Province; Cenozoic-; chemical-composition; igneous-rocks; magmatism-; middle-Miocene; Miocene-; Neogene-; Nevada-; North-America; tectonics-; Tertiary-; United-States; volcanic-rocks; west-central-Nevada DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: University of Nevada - Mackay School of Mines. Reno, NV, United States. Pages: 197. 1996. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1996 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 200214

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---------------------------------------------------------------------------------------------------------- (Reference 195) GEOREF: 2002-044612 CODEN: GCACAK COLLECTION AUTHORS: 24 Quaternary geology; 03 Geochronology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands FEATURES: References: 57; illus. incl. 5 tables, sketch map LATITUDE LONGITUDE: Latitude:N374100,N374600 Longitude:W1184300,W1185200 PUBLICATION TYPE: Serial; Analytic ABSTRACT: In this study, we present super 87 Rb/ super 86 Sr and super 230 Th/ super 238 U isotope analyses of glasses and phenocrysts from postcaldera rhyolites erupted between 150 to 100 ka from the Long Valley magmatic system. Both isotope systems indicate complex magma evolution with preeruptive mineral crystallization and magma fractionation, followed by extended storage in a silicic magma reservoir. Glass analyses yield a Rb-Sr isochron of 257+ or -39 ka, which can be explained by a feldspar-fractionation event approximately 150 ky before eruption. Individual feldspar-glass pairs confirm this age result. A mineral super 230 Th- super 238 U isochron in a low-silica rhyolite from the Deer Mountain Dome defines an age of 236+ or -1 ka, but the glass and whole rock do not lie on the isochron. U-Th fractionation of the rocks is controlled by the accessory minerals zircon and probably allanite, which crystallized at 250+ or -3 ka and 187+ or -9 ka, respectively. All major mineral phases contain accessory mineral phases; therefore, the mineral isochron represents a mixture of zircon and allanite populations. A precision of + or -1 ka for the mixing array implies that the minor phases must have crystallized within this timescale. Longer periods of crystal growth would cause the mixing array to be less well defined. U-series data from other low- and high-silica rhyolites indicate younger accessory mineral crystallization events at approximately 200 and 140 ka, probably related to the thermal evolution of the magma reservoir. These crystallization events are, however, only documented by the accessory minerals and had no further influence on bulk magma compositions. We interpret the indistinguishable age results from both isotope systems approximately 250 ka to record the fractionation of small magma batches by filter pressing from a much larger underlying magma volume, followed by physical isolation and extended storage at the top of the magma reservoir for up to 150 ky. AUTHOR AFFILIATION: Vrije Universiteit Amsterdam, Faculteit der Aardwetenschappen, Amsterdam, Netherlands NLD ACCESSION NUMBER: 2002-044612 AUTHORS: Heumann, Arnd; Davies, Gareth R; Elliott, Tim COLLECTION AUTHORS: 24 Quaternary geology; 03 Geochronology COUNTRY OF PUBLICATION: International III DESCRIPTORS: absolute age; accessory minerals; acidic magmas; allanite; California; Cenozoic; crystallization; dates; Deer Mountain; domes; epidote group; feldspar group; fractional crystallization; framework silicates; glasses; igneous rocks; isochrons; Long Valley Caldera; magma chambers; magmas; magmatic differentiation; Mammoth Mountain; Mono County California; nesosilicates; orthosilicates; phenocrysts; Pleistocene; Quaternary; Rb/Sr; rhyolites; silicates; sorosilicates; thermal history; United States; uranium disequilibrium; volcanic glass; volcanic rocks; zircon ISSN: 0016-7037 LANGUAGE: English

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NOTES: NSG Publ. No. 20011005 PUBLISHER: Pergamon, Oxford, International III PUBLICATION YEAR: 2002 SOURCE: Geochimica et Cosmochimica Acta, vol.66, no.10, pp.1821-1837, May 2002 TITLE: Crystallization history of rhyolites at Long Valley, California, inferred from combined U-series and Rb-Sr isotope systematics UPDATE CODE: 200215 ---------------------------------------------------------------------------------------------------------- (Reference 196) GEOREF: 2002-058217 CODEN: TCTOAM COLLECTION AUTHORS: 16 Structural geology; 03 Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. Referenceincludes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam,Netherlands BOOK EDITORS: Kohn, Barry P; Green, Paul F FEATURES: References: 44; illus. incl. 1 table, geol. sketch map MONOGRAPH TITLE: Low temperature thermochronology; from tectonics to landscapeevolution PUBLICATION TYPE: Serial; Conference document; Analytic ABSTRACT: The Bitterroot metamorphic core complex is an exhumed, mid-crustal,plutonic-metamorphic complex that formed during crustal thickening andsubsequent extension in the hinterland of the North AmericanCordilleran Orogen, in the northern Idaho batholith region. Extensionwas accommodated mainly on the Bitterroot mylonite zone, a500-1500-m-thick shear zone that deforms granitic intrusive rocks asyoung as 53-52 Ma, as well as older high-grade metamorphic rocks andplutons. Exhumation of the core complex, in Eocene time, is marked inthe shear zone by the transition from amphibolite-faciesmylonitization, to greenschist-facies mylonitization, chloriticbrecciation, to brittle faulting that progressed from shallowercrustal levels in the west to deeper crustal levels in the east fromca. 53 -30 Ma based on U-Pb, Ar-Ar, and fission-track data. Apatiteand zircon fission-track data record the lower-temperature part of theexhumation history and help define when the shear zone becameinactive, as well as the transition from rapid, core complex-styleextension to slower basin-and-range-style extension. They indicatethat the western part of the complex was exhumed to within 1-2 km ofthe surface by approximately 48-45 Ma, while the eastern part of thecomplex was still at amphibolite-facies conditions and that theeastern part of the complex was not exhumed below approximately 60degrees C until after 30 Ma. Younger apatite fission-track ages <or =26 Ma on the eastern range front of the Bitterroot Mountainssuggest that the present topographic expression of the mylonite frontwas due to Miocene high-angle faulting and widening of the BitterrootValley. AUTHOR AFFILIATION: University of Melbourne, School of Earth Sciences, Melbourne,Victoria, Australia AUS ACCESSION NUMBER: 2002-058217 AUTHORS: Foster, David A; Raza, Asaf COLLECTION AUTHORS: 16 Structural geology; 03 Geochronology CONFERENCE INFORMATION: 9th international conference on Fission track dating andthermochronology, Lorne, Victoria, Australia, Feb. 6-11, 2000 COUNTRY OF PUBLICATION: Netherlands NLD DESCRIPTORS: absolute age; accommodation zones; apatite; Ar/Ar; Basin and RangeProvince; Bitterroot Range; brecciation; brittle deformation;Cenozoic;

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complexes; continental crust; Cordilleran Orogeny; crust;crustal thickening; dates; deformation; exhumation; extension; faults;fission-track dating; foot wall; Idaho; Idaho Batholith; lowtemperature; metamorphic core complexes; metamorphic rocks;metaplutonic rocks; mylonites; mylonitization; nesosilicates; NorthAmerica; orogenic belts; orthosilicates; phosphates; Rocky Mountains;shear zones; silicates; tectonics; temperature; thermochronology;topography; U. S. Rocky Mountains; U/Pb; United States; zircon ISSN: 0040-1951 LANGUAGE: English PUBLICATION YEAR: 2002 SOURCE: Tectonophysics, vol.349, no.1-4, pp.23-36, 06 May 2002 TITLE: Low-temperature thermochronological record of exhumation of theBitterroot metamorphic core complex, northern Cordilleran Orogen UPDATE CODE: 200219 ---------------------------------------------------------------------------------------------------------- (Reference 197) GEOREF: 2002-080759 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 82; illus. incl. 2 tables LATITUDE LONGITUDE: Latitude:N451000,N451000 Longitude:W1153000,W1153000 MONOGRAPH TITLE: Geology and geochemistry of the Papoose Peak Quadrangle in the Salmonand Payette National Forest, Idaho and Valley counties, Idaho ORGANIZATION: University of Idaho, Moscow, ID, United States (USA) PAGES DATE: 81 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ABSTRACT: The Papoose Peak Quadrangle, located in central Idaho on the northeastside of the Atlanta lobe of the Late Cretaceous Idaho batholith, ismostly made up of a shallow Eocene intrusion. The Eocene intrusivesuite contains Precambrian metasedimentary roof pendants and intrudesthe Idaho batholith on the northeast corner of the quadrangle. Eoceneintrusive rocks have been divided into two suites: pink granite andquartz monzodiorite (Bennett and Knowles, 1985; Lewis and Kiilsgaard,1991). Previous geochemical evidence for Eocene suites throughoutcentral Idaho suggests they are not related by crystal fractionationof a single magma type. Although the intrusive suite studied hereshows textural characteristics of both the pink granite and the quartzmonzodiorite suites, modal compositions plot in the granite field ofthe I.U.G.S. classification scheme (Strekeisen, 1976). Silica contentof the intrusive suite ranges from 62% to 73% and are calc-alkaline.Geochemical affinities do not clearly classify the intrusive suite ashaving an I-, S-, or A-type source, but possibly a combination ofthese sources. Field relations and linear trends observed throughoutHarker plots suggest the intrusive suite is related through crystalfractionation. Two different crystal fractionation models, one usingratios of trace-elements from different samples and the other amass-balance modeling program using major-element data, suggest theintrusive suite may be related through crystal fractionation. Theintrusive suite of the study area has mineralogical and geochemicalcharacteristics of both the pink granite and quartz monzodioritesuites defined by Bennett and Knowles (1985), and crystalfractionation models support the idea that the intrusive suiteoriginated from one source, with both mantle- and crustal-derivedcomponents. Isotopic data are needed to further test this hypothesis. ACCESSION NUMBER: 2002-080759

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AUTHORS: Najar, Pedro, Jr COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: Cenozoic; chemical composition; crystal fractionation; emplacement;Eocene; granites; Idaho; Idaho County Idaho; igneous rocks; magmatism;Paleogene; Papoose Peak Quadrangle; Payette National Forest; plutonicrocks; Salmon River; Tertiary; United States; Valley County Idaho LANGUAGE: English PUBLICATION YEAR: 1998 UPDATE CODE: 200224 ---------------------------------------------------------------------------------------------------------- (Reference 198) GEOREF: 2003-008128 CODEN: #01513 LATITUDE LONGITUDE: LAT| N385954; N390935; LONG: W1182633; W1185000. MAP TYPE: color-geologic-maps ABSTRACT: A 1|24,000-scale, full-color geologic map of the southern Sand Springs Range with 5 cross sections and descriptions of 42 geologic units. Accompanying text describes the geology of the southern Sand Springs Range, emphasizing the large expanse of pre-Cretaceous metamorphic rocks within and three phases of Mesozoic folds and faults. ACCESSION NUMBER: 2003-008128 BOOK AUTHORS: Satterfield-Joseph-I BOOK AUTHOR AFFILIATION: San Jacinto College, Houston, TX, United States BOOK TITLE: Geologic map of the southern Sand Springs Range, Churchill and Mineral counties, Nevada. BIB LEVEL: Monograph CATEGORY CODES: 14-Geologic-maps COUNTRY OF PUBLICATION: United-States DESCRIPTORS: areal-geology; Basin-and-Range-Province; Big-Kasock-Mountain; Churchill-County-Nevada; cross-sections; explanatory-text; Fairview-Valley; geologic-maps; Great-Basin; maps-; Mineral-County-Nevada; Nevada-; Nevada-Pluton; North-America; Sand-Springs-Pluton; Sand-Springs-Range; United-States DOCUMENT TYPE: Map; Serial; Report ILLUSTRATION: Refs 33; illus. incl. 6 tables, sects. ISSN: 0731-3128 LANGUAGE: English MAP TYPE: color-geologic-maps MAP SCALE: 1|24,000 PUBLISHER: Nevada Bureau of Mines and Geology. Reno, NV, United States. Pages: 16, 1 sheet. 2002. PUBLICATION YEAR: 2002 REFERENCE SOURCE: GeoRef, Copyright 2003, American Geological Institute. Reference includes data supplied by Nevada Bureau of Mines and Geology, Reno, NV, United States REPORT NUMBER: 133 SOURCE: Map - Nevada Bureau of Mines and Geology. 2002. UPDATE CODE: 200303 ----------------------------------------------------------------------------------------------------------

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(Reference 199) GEOREF: 2003-025645 CODEN: LITHAN COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands FEATURES: References: 85; illus. incl. 1 table, sketch maps PUBLICATION TYPE: Serial; Analytic ABSTRACT: Igneous rocks exposed on Electric Peak and Sepulcher Mountain represent the preserved intrusive and extrusive components of an early Eocene, calc-alkaline eruptive center in the Absaroka Volcanic Province AVP of Montana and Wyoming, USA. The Electric Pe AUTHOR AFFILIATION: Montana State University, Department of Earth Sciences, Bozeman, MT, United States USA ACCESSION NUMBER: 2003-025645 AUTHORS: Lindsay, C R; Feeley, T C COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COUNTRY OF PUBLICATION: International III DESCRIPTORS: Absaroka Range; alkali feldspar; alkaline earth metals; amphibole group; basalts; biotite; calc-alkalic composition; Cenozoic; chain silicates; clinopyroxene; dikes; Electric Peak-Sepulcher Mountain Complex; Eocene; extrusive rocks; feldspar group; framew ISSN: 0024-4937 LANGUAGE: English PUBLISHER: Elsevier, Amsterdam, International III PUBLICATION YEAR: 2003 SOURCE: Lithos, vol.67, no.1-2, pp.53-76, Mar 2003 TITLE: Magmagenesis at the Eocene Electric Peak-Sepulcher Mountain complex, Absaroka Volcanic Province, USA UPDATE CODE: 2003 ---------------------------------------------------------------------------------------------------------- (Reference 200) GEOREF: 2003-046301 CODEN: GLGYBA LATITUDE LONGITUDE: LAT N294748; N294910; LONG W1042247; W1042439. AUTHOR AFFILIATION: University of Texas Austin, Department of Geological Sciences, Austin, TX, United States ACCESSION NUMBER: 2003-046301 AUTHORS: Gilmer-A-K; Kyle-J-R; Connelly-J-N; Mathur-R-D; Henry-C-D BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits; 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Ar-Ar; Cenozoic-; Chinati-Mountains; copper-ores; Cretaceous-; dates-; granites-; host-rocks; igneous-rocks; intrusions-; Laramide-Orogeny; magmatism-; Mesozoic-; metal-ores; metallogeny-; mineral-deposits,-genesis; molybdenite-; molybdenum-ores; nesosilicates-; orthosilicates-; Paleocene-; Paleogene-; plate-tectonics; plutonic-rocks;

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porphyry-; porphyry-copper; porphyry-molybdenum; Presidio-County-Texas; quartz-monzonite; Re-Os; Red-Hills-Deposit; silicates-; Southwestern-U.S.; stocks-; stockwork-deposits; subduction-; sulfides-; Tertiary-; Texas-; Trans-Pecos; U-Pb; United-States; Upper-Cretaceous; zircon- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 18; illus. incl. geol. sketch maps. ISSN: 0091-7613 LANGUAGE: English ANNOTATION: With GSA Data Repository Item 2003059. PUBLISHER: Geological Society of America GSA. Boulder, CO, United States. 2003. PUBLICATION YEAR: 2003 REFERENCE SOURCE: GeoRef, Copyright 2003, American Geological Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States SOURCE: Geology Boulder. 31; 5, Pages 447-450. 2003. . TITLE: Extension of Laramide magmatism in southwestern North America into Trans-Pecos Texas. UPDATE CODE: 200315 ---------------------------------------------------------------------------------------------------------- (Reference 201) GEOREF: 2003-050832 CODEN: JGEOAZ COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 72; illus. incl. 1 table, geol. sketch map PUBLICATION TYPE: Serial; Analytic SPONSOR: _NULL_ ABSTRACT: In order better to understand the origin and significance of across-strike geochemical variations in the Eocene Absaroka volcanic province AVP, this article compares compositional data for magmatic rocks from two eruptive centers that define type localities for major stratigraphic subdivisions of the Absaroka Volcanic Supergroup. Geochemical variations for evolved lavas indicate that the calc-alkaline differentiation trend at Washburn volcano results from mixing compositionally diverse mafic and silicic magmas, whereas the shoshonitic trend at the more easternly Sunlight volcano reflects assimilation-fractional crystallization. The mantle source for both volcanoes is, as shown by incompatible trace element contents and radiogenic isotopic ratios of mafic lavas, largely within ancient depleted lithospheric mantle later enriched by a metasomatic event characterized by low Sm/Nd and Rb/Sr ratios. The approximate timing of the enrichment event, as calculated from Nd isotopic data 2.2-2.0 Ga, is similar to estimates from other magmatic fields in the Wyoming Province. Large variations in trace element ratios of mafic lavas involving large ion lithophile elements LILE and light rare earth element that are not obviously reflected in isotopic ratios also indicate a recent <100 Ma metasomatic enrichment event. Superficially, the mantle source for Sunlight volcano appears to contain larger amounts of the young metasomatic component, as measured by high LILE/high field strength element HFSE ratios. Parental magmas at both volcanoes have similar HFSE contents and HFSE/heavy rare earth element ratios, however, suggesting comparable degrees of source region melting and metasomatism. Rather than variable degrees of metasomatism and partial melting, the geochemical differences between the mafic rocks are best explained by

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compositional heterogeneity in metasomatic fluids inherited from breakdown of different phases in hydrous peridotite. A consistent geodynamic model to account for generation of AVP magmas involves metasomatism of asthenosphere and subcontinental mantle lithosphere during shallow subduction of the Farallon plate during the Late Cretaceous through Paleocene, followed in the Eocene by foundering of the slab and primary basalt generation through major heating associated with upwelling and influx of hot asthenosphere. AUTHOR AFFILIATION: Montana State University, Department of Earth Sciences, Bozeman, MT, United States USA ACCESSION NUMBER: 2003-050832 AUTHORS: Feeley, T C COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Absaroka Supergroup; alkaline earth metals; calc-alkalic composition; Cenozoic; Eocene; geochemistry; heterogeneity; high-field-strength elements; igneous rocks; isotope ratios; isotopes; lava; lithophile elements; mafic composition; magmas; magmatic differentiation; major elements; metals; metasomatism; Nd-144/Nd-143; neodymium; Paleogene; Park County Wyoming; rare earths; Sr-87/Sr-86; stable isotopes; strontium; Sunlight; tectonics; Tertiary; trace elements; United States; vents; volcanic rocks; volcanoes; Washburn; water-rock interaction; Wyoming; Yellowstone National Park ISSN: 0022-1376 LANGUAGE: English PUBLISHER: University of Chicago Press, Chicago, IL, United States USA PUBLICATION YEAR: 2003 SOURCE: Journal of Geology, vol.111, no.3, pp.329-346, May 2003 TITLE: Origin and tectonic implications of across-strike geochemical variations in the Eocene Absaroka volcanic province, United States UPDATE CODE: 200316 ---------------------------------------------------------------------------------------------------------- (Reference 202) GEOREF: 2004-012462 CODEN: GAAPBC COLLECTION AUTHORS: 16, Structural geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States MONOGRAPH TITLE: Geological Society of America, Cordilleran Section, 99th annual meeting PUBLICATION TYPE: Serial; Conference document; Analytic; Abstract only ABSTRACT: The Golden Bear and Coso Dike sets are distinctive K-feldspar porphyry dikes that crop out on opposite sides of Owens Valley. Petrographic, chemical, isotopic, and geochronologic data suggest that the dike sets are correlative. The correlation requires approximately 65 km of dextral offset across the valley since the dikes were intruded ca. 83 Ma, which greatly exceeds previous estimates. The Golden Bear and Coso dikes strike roughly perpendicular to Owens Valley, and neither reappears on the opposite side of the valley. New U-Pb zircon data from four samples indicate that both sets were intruded ca. 83 Ma. The dikes cut similar, distinctive wall rocks, including newly dated 102 Ma leucogranites Independence and Sardine plutons in the Sierra Nevada; Coso leucogranite in the Coso Range. The sets have nearly identical textures and

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mineralogy, with K-spar phenocrysts up to 8 cm across and euhedral quartz bipyramids approximately 1 cm across. Major and trace element contents also are indistinguishable; however, interpretation of preliminary Sr isotopic data is more complicated. Isotopic compositions of contiguous portions of each dike set vary and compositional ranges of the two sets do not overlap Golden Bear: 0.7069-0.7073, Coso: 0.7074-0.7084 Chilled margins are consistently less radiogenic than adjacent dike cores. We interpret the data to suggest that the dike sets are correlative, but that they have been variably contaminated by their wall rocks. Consequently, we interpret the two sets to have once been continuous and later offset from each other by approximately 65 km of dextral shear. We hypothesize that dextral offset of the dike sets was accommodated by a through-going right-slip fault system, extending northward up Owens Valley from the western side of the Coso Range. If faulting began during the Pliocene as some studies suggest, an offset of 65 km requires either slip rates were at least 25% faster than current geodetically measured rates 5 mm/yr or earlier inception of faulting, perhaps during the late Miocene regional transition from orthogonal extension to dextral transtension. Pliocene onset and a slower slip rate also is possible if there was significant Late Cretaceous or early Cenozoic offset. AUTHOR AFFILIATION: University of Utah, United States USA ACCESSION NUMBER: 2004-012462 AUTHORS: Anonymous COLLECTION AUTHORS: 16, Structural geology CONFERENCE INFORMATION: Geological Society of America, Cordilleran Section, 99th annual meeting, Puerto Vallarta, Mexico, April 1-3, 2003 COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; alkali feldspar; California; dates; dike swarms; displacements; faults; feldspar group; framework silicates; K-feldspar; lateral faults; nesosilicates; orthosilicates; Owens Valley; phenocrysts; right-lateral faults; silicates; tectonics; U/Pb; United States; zircon ISSN: 0016-7592 LANGUAGE: English PUBLICATION YEAR: 2003 SOURCE: Abstracts with Programs - Geological Society of America, vol.35, no.4, pp.80, Apr 2003 TITLE: Post-Cretaceous dextral offset of 65 km across Owens Valley, California, implied by correlation of the Golden Bear and Coso dike sets UPDATE CODE: 200404 ---------------------------------------------------------------------------------------------------------- (Reference 203) GEOREF: 2004-049391 CODEN: #01513 LATITUDE LONGITUDE: LAT| N395230; N400000; LONG: W1152624; W1153730. MAP TYPE: color-geologic-maps ABSTRACT: A geologic map showing Paleozoic carbonate and clastic rocks, Tertiary sedimentary and volcanic rocks, and Quaternary deposits of the the Bald Mountain mining district in Nevada. ACCESSION NUMBER: 2004-049391 BOOK AUTHORS: Nutt-Constance-J; Hart-Kerry-S BOOK AUTHOR AFFILIATION: U. S. Geological Survey, Denver, CO, United States; Placer Dome NA, United States BOOK TITLE: Geologic map of the Big Bald Mountain Quadrangle and part of the

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Tognini Spring Quadrangle, White Pine County, Nevada. BIB LEVEL: Monograph CATEGORY CODES: 14-Geologic-maps COUNTRY OF PUBLICATION: United-States DESCRIPTORS: areal-geology; Bald-Mountain-mining-district; Big-Bald-Mountain; Big-Bald-Mountain-Quadrangle; geologic-maps; Little-Bald-Mountain; maps-; Mooney-Basin; Nevada-; Tognini-Spring; Tognini-Spring-Quadrangle; United-States; White-Pine-County-Nevada DOCUMENT TYPE: Map; Serial; Report ILLUSTRATION: Refs 25; illus. incl. 1 table, sects. ISSN: 0731-3128 LANGUAGE: English MAP TYPE: color-geologic-maps MAP SCALE: 1|24,000 PUBLISHER: Nevada Bureau of Mines and Geology. Reno, NV, United States. Pages: 8, 1 sheet. 2004. PUBLICATION YEAR: 2004 REFERENCE SOURCE: GeoRef, Copyright 2004, American Geological Institute. Reference includes data supplied by Nevada Bureau of Mines and Geology, Reno, NV, United States REPORT NUMBER: 145 RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Map - Nevada Bureau of Mines and Geology. 2004. UPDATE CODE: 200414 ---------------------------------------------------------------------------------------------------------- (Reference 204) GEOREF: 2004-074068 CODEN: _NULL_ COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: _NULL_ PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic SPONSOR: _NULL_ ABSTRACT: _NULL_ AUTHOR AFFILIATION: University of North Carolina, Chapel Hill, Chapel Hill, NC, United States USA AUTHORS: Gray, Walt COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age alkaline earth metals California Cretaceous depth emplacement geochemistry intrusions isotope ratios isotopes magmas Mesozoic metals mixing Nd-144/Nd-143 neodymium nesosilicates orthosilicates partial melting plutons rare earths silicates Sr-87/Sr-86 stable isotopes strontium trace elements Tuolumne intrusive suite U/Pb United States Upper Cretaceous Yosemite National Park zircon ISSN: _NULL_ LANGUAGE: English PUBLISHER: _NULL_ PUBLICATION YEAR: 2003 SOURCE: _NULL_

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TITLE: Chemical and thermal evolution of the Late Cretaceous Tuolumne intrusive suite, Yosemite National Park, California UPDATE CODE: 2004 ---------------------------------------------------------------------------------------------------------- (Reference 205) GEOREF: 2004-900005 (unpublished Georef; Navdat only) AUTHORS: Pauly-B, Henry-C-D TITLE: Unpublished Data ---------------------------------------------------------------------------------------------------------- (Reference 206) GEOREF: 2004-900012 (unpublished Georef; Navdat only) AUTHORS: Garside-L-J, Henry-C-D TITLE: Unpublished Data ---------------------------------------------------------------------------------------------------------- (Reference 207) GEOREF: 2004-900015 (unpublished Georef; Navdat only) AUTHORS: Ressel-M-W, Henry-C-D TITLE: Unpublished Data ---------------------------------------------------------------------------------------------------------- (Reference 208) GEOREF: 2004-900088 (unpublished Georef; Navdat only) ACCESSION NUMBER: 2004-9000088 AUTHORS: McIntosh, W.C., and Chapin, C.E. SOURCE: Unpublished TITLE: Geochronology of the Central Colorado Volcanic Field ---------------------------------------------------------------------------------------------------------- (Reference 209) GEOREF: 2004-900100 (unpublished Georef; Navdat only) CODEN: _NULL_ COLLECTION AUTHORS: _NULL_ COPYRIGHT: _NULL_ FEATURES: _NULL_

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PUBLICATION TYPE: _NULL_ SPONSOR: Idaho Geological Survey ABSTRACT: _NULL_ AUTHOR AFFILIATION: Idaho Geological Survey AUTHORS: John D. Kauffman COLLECTION AUTHORS: _NULL_ COUNTRY OF PUBLICATION: _NULL_ DESCRIPTORS: _NULL_ ISSN: DAD-1 LANGUAGE: English PUBLISHER: Idaho Geological Survey PUBLICATION YEAR: 2004 SOURCE: Idaho Geological Survey DAD-1 TITLE: Major Oxide and Trace Element Analyses for Volcanic Rock Samples From Idaho From 1978 Through 2003 UPDATE CODE: 2004 ---------------------------------------------------------------------------------------------------------- (Reference 210) GEOREF: 2005-046755 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 12 Stratigraphy COPYRIGHT: GeoRef, Copyright 2005, American Geological Institute. FORMAT COVERED: WWW FEATURES: References: 63; illus. incl. sect., 1 table, geol. sketch maps LATITUDE LONGITUDE: Latitude:N432500,N434500 Longitude:W1135500,W1141500 MONOGRAPH TITLE: Geology and stratigraphy of the Challis volcanic group and relatedrocks, Little Wood River area, south-central Idaho, with a section ongeochronology PUBLICATION TYPE: Serial; Report; Monographic RESOURCE LOCATION: http://pubs.usgs.gov/bul/2064/ii] SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: The Challis volcanic field is the largest of several Eocene volcanicfields in the Pacific Northwest of the United States and Canada. Inthe Little Wood River area of Idaho, rock types in the Eocene ChallisVolcanic Group include andesite lava flows and tuff breccia, dacitelava flows and flow breccia, volcaniclastic sedimentary rocks, lithictuff, nonvolcanic conglomerate, and rhyolite dikes. AUTHOR AFFILIATION: U. S. Geological Survey, USA, United States ACCESSION NUMBER: 2005-046755 AUTHORS: Sanford, Richard F; Snee, Lawrence W COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 12 Stratigraphy COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: breccia; Cenozoic; Challis Volcanics; Eocene; Idaho; igneous rocks;lava flows; lithostratigraphy; Little Wood River valley; Paleogene;pyroclastics; south-central Idaho; Tertiary; tuff; United States;USGS; volcanic rocks; volcaniclastics ISSN: 8755-531X LANGUAGE: English NOTES: Accessed on July 6, 2005; includes appendix PUBLICATION YEAR: 2005 RESEARCH PROGRAM: B 2064-II SOURCE: U. S. Geological Survey Bulletin, Report: B 2064-II, 22 pp., May 2005 UPDATE CODE: 2005

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---------------------------------------------------------------------------------------------------------- (Reference 211) GEOREF: 2005-062998 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 16 Structural geology COPYRIGHT: GeoRef, Copyright 2005, American Geological Institute. FEATURES: References: 44; illus. incl. 1 table, geol. sketch maps LATITUDE LONGITUDE: Latitude:N470000,N471500 Longitude:W1114500,W1121500 MONOGRAPH TITLE: super 40 Ar/ super 39 Ar and K-Ar geochronology and tectonicsignificance of the Upper Cretaceous Adel Mountain Volcanics andspatially associated Tertiary igneous rocks, northwestern Montana PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: We report new super 40 Ar/ super 39 Ar and K-Ar dates from theUpper Cretaceous Adel Mountain Volcanics of northwestern Montana andspatially related Tertiary igneous rocks. The Adel Mountain volcanicfield consists of about 900 square kilometers of lavas, associatedvolcaniclastic strata, and intrusions that lie astride the easternmostfolds of the Montana disturbed belt of the Cordilleran fold and thrustbelt. The Adel Mountain volcanic rocks have been intensely deformed byfolds and thrust faults along their southwestern margin but areessentially undeformed to the east. Prior to isotopic dating, the ageof the Adel Mountain Volcanics was the subject of debate, with ageassignments ranging from Late Cretaceous to early Tertiary. Isotopicdates reported here demonstrate that the Adel Mountain Volcanics areclearly Late Cretaceous and that the volcanic rocks were probablyemplaced during an approximately 2- to 3-million-year interval betweenabout 76 to 73 mega-annum Ma. The new dates from the Adel MountainVolcanics are significant in that they provide a more refined andreliable age for the Late Cretaceous cratonic paleomagnetic referencepole for North America. The dates from the Adel Mountain Volcanics, aswell as those from spatially related younger intrusions, also provideimportant constraints on the age of fold and thrust-belt deformationalong the eastern margin of the Montana disturbed belt. Syntectonicdeformation of the Adel Mountain Volcanics, as well as apparentfolding and faulting of Tertiary quartz monzonite sills, indicatesthat contractional deformation clearly spanned the Late Cretaceous andmay have extended to as young as the Paleocene/Eocene boundary atabout 55.5 Ma. Elsewhere, posttectonic field relationships indicatethat deformation may have ended prior to 60 Ma. Complexities in fieldrelationships with respect to folds and faults shown by the earlyTertiary intrusions as well as complications in the argon systematicsindicate that these interpretations must be considered preliminary.Further field work and structural studies and additionalhigh-precision geochronology are needed in order to place limits onthe cessation of contractional deformation in this part of Montana.Unambiguously posttectonic dikes 47.5 Ma that cut all deformed rocksand structures in the area indicate that disturbed belt deformationhad clearly ceased by the early middle Eocene prior to the onset ofwidespread crustal extension in this part of the northern Cordillera. AUTHOR AFFILIATION: George Mason University, Fairfax, VA, United States USA ACCESSION NUMBER: 2005-062998 AUTHORS: Harlan, Stephen S; Snee, Lawrence W; Reynolds, Mitchell W; Mehnert,Harald H; Schmidt, R G; Sheriff, Steve D; Irving, Anthony J COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 16 Structural geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Adel Mountain Volcanics; anticlinoria; Ar/Ar;

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Cenozoic;Cretaceous; dates; deformation; dikes; extension; feldspar group; foldand thrust belts; folds; framework silicates; igneous rocks;intrusions; K/Ar; lithostratigraphy; Mesozoic; Montana; monzonites;northwestern Montana; paleomagnetism; plagioclase; plutonic rocks;silicates; sills; tectonics; Tertiary; United States; UpperCretaceous; USGS ISSN: 1044-9612 LANGUAGE: English PUBLICATION YEAR: 2005 RESEARCH PROGRAM: P 1696 SOURCE: U. S. Geological Survey Professional Paper, Report: P 1696, 29 pp.,2005 UPDATE CODE: 200521 ---------------------------------------------------------------------------------------------------------- (Reference 212) GEOREF: 2005-069531 CODEN: #03206 LATITUDE LONGITUDE: LAT| N390700; N420000; LONG: W1191000; W1200000. ACCESSION NUMBER: 2005-069531 BOOK AUTHORS: Garside-Larry-J editor; Castor-Steven editor; Henry-Christopher-D editor; Faulds-James-E editor BOOK AUTHOR AFFILIATION: University of Nevada, Nevada Bureau of Mines and Geology, Reno, NV, United States BOOK TITLE: Geology and ore deposits 2000. BIB LEVEL: Monograph CORPORATE AUTHOR: Nevada Bureau of Mines and Geology, United States, sponsor CATEGORY CODES: 13-Areal-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: areal-geology; Basin-and-Range-Province; field-trips; geochemistry-; gold-ores; Great-Basin; lithostratigraphy-; magmatism-; metal-ores; mines-; Nevada-; North-America; Olinghouse-Mine; Pah-Rah-Range; Perry-Canyon-Caldera; polymetallic-ores; Pyramid-mining-district; road-log; tectonics-; United-States; volcanism-; Washoe-County-Nevada DOCUMENT TYPE: Serial ILLUSTRATION: Refs 119; illus. incl. sects., strat. col., geol. sketch maps. LANGUAGE: English ANNOTATION: Includes appendix; field trip held May 13-14, 2000. PUBLISHER: Geological Society of Nevada, United States. Pages: 180. 2000. PUBLICATION YEAR: 2000 REFERENCE SOURCE: GeoRef, Copyright 2005, American Geological Institute. AGI SOURCE: Field Trip - Geological Society of Nevada Symposium. 2000, Vol. 2; 2000. UPDATE CODE: 200523 ---------------------------------------------------------------------------------------------------------- (Reference 213) GEOREF: 2006-900050 (unpublished Georef; Navdat only) MONOGRAPH TITLE: Large dextral offset across Owens Valley, California, and its possible relation to tectonic unroofing of the southern Sierra Nevada ACCESSION NUMBER: 2006-900050 AUTHORS: Bartley, J. M., Glazner, A.F., Coleman, D.S., Kylander-Clark., A.,

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Mapes., R., and Friedrich, A.M. PUBLICATION YEAR: 2006 ---------------------------------------------------------------------------------------------------------- (Reference 214) GEOREF: 1999-027998 COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 140; illus. incl. 22 tables MONOGRAPH TITLE: Geochemistry and petrogenesis of the Eocene Boulder Mountain Stock,central Idaho ORGANIZATION: Washington State University, Pullman, WA, United States USA PAGES DATE: 169 PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ABSTRACT: The Boulder Mountain Stock, a shallow Eocene pluton in central Idaho,is composed of two major compositional suites: 1 a mineralogicallyuniform weakly peraluminous high-silica granite suite; and 2 ametaluminous granodiorite suite comprising mostly hornblende andbiotite-rich quartz monzodiorite and quartz monzonite. Field relationssuggest that the granodiorite is the older unit. Detailed traceelement combined with stable and radiogenic isotopic data are reportedhere for this stock and are used to identify respective sources foreach suite and the nature of the underlying craton. Pb isotopic ratiosplace both suites in the field of magmas derived from Precambriancrystalline basement, super 87 Sr/ super 86 Sr, super 143 Nd/super 144 Nd, and delta super 18 O isotopic ratios also suggestcrustal components. Pb-Pb isochron and T super Nd model agedeterminations of 1.6 Ga for the granite and 1.9 Ga for thegranodiorite imply a Proterozoic, rather than Archean, age for thelower crust in central Idaho. Earlier studies have suggested aco-magmatic origin for these intrusive suites, but the combined major,trace element, and isotopic data suggest that the two suites must bederived from different sources. The absence of mantle signaturesimplies that partial melting occurred completely within thecontinental crust, possibly as a direct result of Cenozoic tectonicthickening. The respective suites were derived separately, and theirmagmas are not genetically related by fractional crystallization orsource mixing. The granodiorite was generated by partial melting of agarnet amphibolite or mafic granulite completely within the lowercrust, while the granite is a lower/upper crustal hybrid composed of agarnet-bearing lower crustal granulite severely modified bycontamination of middle to upper crustal Proterozoic units of theBelt-Yellowjacket Terrane. Thus, the Eocene magmas in central Idaho donot appear to be directly related to subduction; however, theirgenesis is probably related to heat transfer from the upper mantle tothe crust and subsequent lithospheric thinning. ACCESSION NUMBER: 1999-027998 AUTHORS: Robertson, Melissa Claire COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkaline earth metals; Boulder Mountain Stock; Cenozoic; Eocene;fractional crystallization; genesis; geochemistry; granites;granodiorites; Idaho; igneous rocks; intrusions; isotope ratios;isotopes; lead; magma contamination; magmas; metals; mixing;Nd-144/Nd-143; neodymium; O-18/O-16; oxygen; Paleogene; partialmelting; plutonic rocks;

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rare earths; Sr-87/Sr-86; stable isotopes;stocks; strontium; Tertiary; trace elements; United States LANGUAGE: English PUBLICATION YEAR: 1997 UPDATE CODE: 1999 ---------------------------------------------------------------------------------------------------------- (Reference 215) GEOREF: 1999-028965 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 142; illus. LATITUDE LONGITUDE: Latitude:N423500,N435900 Longitude:W1130000,W1150000 ;Latitude:N431200,N435200 Longitude:W1142100,W1150600 MONOGRAPH TITLE: Geology, geochemistry, and petrogenesis of the Eocene Prairie CreekStock, Smoky Mountains, Blaine and Camas Counties, Idaho ORGANIZATION: Washington State University, Pullman, WA, United States USA PAGES DATE: 221 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ABSTRACT: The Prairie Creek stock, located in central Idaho along thesoutheastern margin of the Idaho batholith, is a shallow Eocenegranitic intrusion. Directly overlying the granite is a gradationalunit of dacite prophyry and granodiorite. Previous work in the areasuggests that the granite and granodiorite are co-magmatic. However,trace element, radiogenic, and stable isotope data indicate distinctpetrogenetic histories and source materials for the two suites.Granite suite initial super 87 Sr/ super 86 Sr ratios of 0.7095 to0.7097 and epsilon sub Nd near -14 imply that the granites wereproduced by melting within the lower crust. Pb-Pb isochron ages super 206 Pb/ super 204 Pb = 18.19 to 18.24, super 207 Pb/super 204 Pb = 15.59 to 15.61, and super 208 Pb/ super 204 Pb =38.76 to 38.87 and Nd model ages of 1.5 to 1.7 Ga from the granitesuggest that the lower crust in the region is Middle Proterozoic.delta super 18 O quartz values of 8.6 to 9.9 per mil also indicatethe granites were derived from crustal material. The granite magmasmay also have assimilated some middle-upper crust during their ascent.Limited data suggest that the granodiorites followed a similarhistory, however, during their genesis incorporated smallerproportions of upper crustal material than the granite suite. deltasuper 18 O values quartz-feldspar fractionations ranging from 1.6to 7.6 per mil from the granite show that some of the rocks werealtered by meteoric hydrothermal fluids. Crustal thickening and/orEocene lithospheric extension, documented by various workers, may havesteepened the geothermal gradient in the area. This could havefacilitated melting in the lower crust and produced the magmas thatformed the Prairie Creek area igneous rocks. ACCESSION NUMBER: 1999-028965 AUTHORS: Reppe, Thomas Harold COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; alkaline earth metals; Blaine County Idaho; Camas CountyIdaho; Cenozoic; crust; dates; Eocene; framework silicates; genesis;geochemistry; granites; granodiorites; Great Smoky Mountains; Idaho;igneous rocks; intrusions; isotope ratios; isotopes; lower crust;magmas; magmatism; metals; Nd-144/Nd-143; neodymium; O-18/O-16;oxygen; Paleogene; Pb/Pb; petrography; plutonic rocks; Prairie CreekStock; quartz; radioactive isotopes; rare earths; silica minerals;silicates; Sr-87/Sr-86; stable isotopes; stocks;

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strontium; Tertiary;trace elements; United States LANGUAGE: English PUBLICATION YEAR: 1997 UPDATE CODE: 1999 ---------------------------------------------------------------------------------------------------------- (Reference 216) GEOREF: 1999-028972 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 114; illus. incl. plates, tables MONOGRAPH TITLE: Petrology, geochemistry and petrogenesis of the Eocene Big Smoky CreekStock, south-central Idaho ORGANIZATION: Washington State University, Pullman, WA, United States USA PAGES DATE: 147 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ABSTRACT: The Eocene Big Smoky Creek Stock is one of many shallow graniticplutons located along the eastern margin of the Idaho Batholith insouth-central Idaho. The Big Smoky Creek Stock is a homogeneous bodyof medium grained, hornblende-biotite granite. The granite suite isuniform mineralogically and texturally. The granite is closely relatedtemporally and spatially with a dacite-granodiorite suite which formsa hypabyssal-plutonic complex surrounding the Big Smoky Creek Stock.The dacite-granodiorite suite is a quartz monzodiorite to granite andcomprises numerous gradational dikes and plutons. Previous work andfield relations have shown the dacite-granodiorite to be older andthat the two suites have different parent magmas. The BSCS wasaffected by hydrothermal activity after crystallization, based onoxygen isotopes. This activity did not affect Sr since Rb-Sr datingreturns ages of approximately 50 Ma, similar to previous ages in thearea. The suites have an anorogenic origin with partial meltingcompletely within the middle to lower continental crust facilitated byan extensional regime prior to and during the emplacement of the twosuites. Major, trace and REE suggest different sources for the twosuites non-co-magmatic. Radiogenic isotopes suggest the sourceregion was the lower crust with the dacite-granodiorite sourceslightly deeper than the granite source, although mixing ofdacite-granodiorite sources can not be ruled out. Oxygen isotopic datasuggest minor, if any, upper crustal contamination. The source rocksare possibly granulite rocks of Proterozoic age. Thesegranulite-facies rocks appear to have limited to absent garnet in theresidue. REE suggest limited plagioclase in the dacite-granodiorite'ssource residue and larger amounts of plagioclase in the granite'ssource residue. A mafic amphibolite facies source is suggested for thedacite-granodiorite and a more felsic source for the granite. Pb andNd model ages determined sources of Proterozoic age. Successful REEmodelling from a greywacke source suggests Proterozoic metasedimentaryrocks Belt Supergroup as a possible source component for the granitesuite. ACCESSION NUMBER: 1999-028972 AUTHORS: Mitchell, Todd Andrew COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Big Smoky Creek Stock; Cenozoic; chemical composition;dacites; dates; Eocene; genesis; geochemistry; granites;granodiorites; hydrothermal alteration; Idaho; Idaho Batholith;igneous rocks; intrusions; isotopes; magmas; major elements; metals;metasomatism; minerals; O-18/O-16; oxygen; Paleogene; partial melting;petrography; plutonic

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rocks; plutons; Precambrian; Proterozoic; rareearths; Rb/Sr; stable isotopes; stocks; Tertiary; textures; traceelements; United States; upper Precambrian; volcanic rocks LANGUAGE: English PUBLICATION YEAR: 1997 UPDATE CODE: 1999 ---------------------------------------------------------------------------------------------------------- (Reference 217) GEOREF: 1999-038369 CODEN: XGROAG COLLECTION AUTHORS: 14, Geologic maps COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. FEATURES: References: 37; illus. incl. 5 tables LATITUDE LONGITUDE: Latitude:N351500,N352230 Longitude:W1150730,W1151 MAP TYPE: Scale: 1|24,000. Type: colored geologic map MONOGRAPH TITLE: Geologic map of the Hart Peak Quadrangle, California and Nevada PAGES DATE: 12 pp., 1 sheet PUBLICATION TYPE: Map; Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geological Survey, Menlo Park, CA, United States USA ACCESSION NUMBER: 1999-038369 AUTHORS: Nielson, Jane E; Turner, Ryan D AVAILABILITY: U. S. Geol. Surv., Denver, CO, United States; http://ngmsvr.wr.usgs.gov/Prodesc/proddesc_17824.htm BOOK AUTHORS: Nielson-Jane-E; Turner-Ryan-D BOOK AUTHOR AFFILIATION: U. S. Geological Survey, Menlo Park, CA, United States; Turner Associates, United States BOOK TITLE: Geologic map of the Hart Peak Quadrangle, California and Nevada. BIB LEVEL: Monograph CATEGORY CODES: 14-Geologic-maps COLLECTION AUTHORS: 14, Geologic maps COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: areal geology; Basin and Range Province; California; Castle Mountains; Clark County Nevada; faults; folds; geologic maps; Hart Peak Quadrangle; igneous rocks; lithostratigraphy; maps; metamorphic rocks; metamorphism; Nevada; North America; petrology; Piute Range; San Bernardino County California; tectonic elements; unconformities; United States; USGS; volcanic rocks DOCUMENT TYPE: Map; Serial; Report ILLUSTRATION: Refs: 37; illus. incl. 5 tables. ISSN: 0196-1497 LANGUAGE: English MAP TYPE: Scale: 1|24,000. Type: colored geologic map MAP SCALE: 1:24,000 PUBLISHER: U. S. Geological Survey, Reston, VA, United States USA PUBLICATION YEAR: 1998 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: OF 98-0470 RESEARCH PROGRAM: OF 98-0470 SOURCE: Open-File Report - U. S. Geological Survey, Report: OF 98-0470, 12 pp., 1 sheet, 1998 UPDATE CODE: 199913

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URL: (Availability) http://ngmsvr.wr.usgs.gov/Prodesc/proddesc_17824.htm ---------------------------------------------------------------------------------------------------------- (Reference 218) GEOREF: 2000-053341 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: illus. MONOGRAPH TITLE: Emplacement and exhumation of the southeastern Atlantic Lobe of theIdaho Batholith and outlying stocks, south-central Idaho ORGANIZATION: Idaho State University, Pocatello, ID, United States USA PAGES DATE: 110 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 2000-053341 AUTHORS: Jordan, Brennan T COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: Atlantic Lobe; batholiths; emplacement; exhumation; Idaho; IdahoBatholith; intrusions; south central Idaho; United States LANGUAGE: English PUBLICATION YEAR: 1994 UPDATE CODE: 200018 ---------------------------------------------------------------------------------------------------------- (Reference 219) GEOREF: 1964-013614 CODEN: UCGSAE ABSTRACT: Potassium-argon dates on more than 50 whole-rock samples of volcanic extrusive and pyroclastic rocks of the Sierra Nevada are used with the stratigraphy to determine cenozoic and chronology regional correlation. Andesite pebbles from Wheatland Formation, which contains Eocene mollusks, give a composite date of 53.5 m.y. Dates of 19.9 to 33.2 m.y. on 18 early rhyoltic tuffs show a late Oligocene-early Miocene major period of rhyolitic volcanism; some rhyolite, however, gives dates of 4.7 m.y. The Mehrten Formation and andestic equivalents, including Table Mountain and other latites dated at 8.8 to 9.3 m.y. are middle Miocene-late Pliocene. Dates of 2.9 to 3.5 m.y. on basalts at elevations below Matthes' profile of the Pliocene San Joaquin River show that the Canyon stage of erosion was started by late Pliocene. ACCESSION NUMBER: 1964-013614 BOOK AUTHORS: Dalrymple-G-Brent BOOK TITLE: Cenozoic chronology of the Sierra Nevada, California. BIB LEVEL: Monograph CATEGORY CODES: 03-Geochronology; 12-Stratigraphy COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; California-; Cenozoic-; Cenozoic-chronology; Cenozoic-volcanic-rocks; correlation-; dates-; erosion-features; erosion-surfaces; igneous-rocks; K-Ar-dates; K-Ar-dates-on-basalts; K-Ar; Sierra-Nevada; stratigraphy-; stratigraphy-and-K-Ar-dates; Tertiary-; United-States; volcanic-rocks; volcanism-; whole-rock

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DOCUMENT TYPE: Serial ILLUSTRATION: illus., tables. ISSN: 0068-645X LANGUAGE: English PUBLISHER: University of California. Berkeley, CA, United States. Pages: 41. 1964. PUBLICATION YEAR: 1964 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States SOURCE: University of California Publications in Geological Sciences. 47; 1964. UPDATE CODE: 1964 ---------------------------------------------------------------------------------------------------------- (Reference 220) GEOREF: 1965-016503 CODEN: XGPPA9 MAP TYPE: geologic-maps ABSTRACT: Sedimentary rocks exposed in the area aggregate about 3,800 feet in thickness and are Triassic?, Jurassic, Cretaceous, and Quaternary in age. Igneous rocks form a differentiated calc-alkalic series from microgabbro through quartz monzonite. Generally, least siliceous rocks occur as sills or flat-topped laccoliths and more siliceous rocks as mushroom-shaped laccoliths and bysmaliths. All igneous bodies were intruded into sediments forcibly with no evidence of wallrock alteration or assimilation; pre-intrusive fracture zones controlled emplacement of some. Chemical analyses suggest differentiation from a single-source magma. Uranium, vanadium, and copper deposits possibly related to igneous activity occur in McElmo Canyon. ACCESSION NUMBER: 1965-016503 BOOK AUTHORS: Ekren-E-B; Houser-F-N BOOK TITLE: Geology and petrology of the Ute Mountains area, Colorado. BIB LEVEL: Monograph CATEGORY CODES: 05-Igneous-and-metamorphic-petrology; 12-Stratigraphy COUNTRY OF PUBLICATION: United-States DESCRIPTORS: calc-alkalic-composition; Colorado-; composition-; emplacement-; igneous-rocks; interpretation-; intrusions-; major-element-analyses; Mesozoic-; Montezuma-County-Colorado; petrology-; stratigraphy-; trace-element-analyses; United-States; USGS-; Ute-Mountains DOCUMENT TYPE: Serial; Report ILLUSTRATION: illus., tables. ISSN: 1044-9612 LANGUAGE: English MAP TYPE: geologic-maps PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 74. 1965. PUBLICATION YEAR: 1965 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States REPORT NUMBER: P 0481 RESEARCH PROGRAM: USGS Publications of the U. S. Geological Survey SOURCE: U. S. Geological Survey Professional Paper. 1965. . UPDATE CODE: 1965 URL: Availability http://ngmsvr.wr.usgs.gov/Prodesc/proddesc_4486.htm

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---------------------------------------------------------------------------------------------------------- (Reference 221) GEOREF: 1965-018945 CODEN: XDIGAS COLLECTION AUTHORS: 27, Economic geology of ore deposits COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States FEATURES: illus., tables MAP TYPE: Type: geologic maps MONOGRAPH TITLE: Geology of the Cortez Quadrangle, Nevada PAGES DATE: 117 pp. PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: The stratigraphy, structure, and economic geology of the Cortez quadrangle, in north-central Nevada, are discussed. The area is of particular interest because of the formerly active bonanza silver cap at Cortez and because of the exposure of the Roberts thrust, one of the great structures of the Cordillera and critical to an understanding of Cordilleran evolution. Paleozoic, Mesozoic, and Cenozoic strata and Tertiary volcanics are exposed in the area. The Roberts thrust is latest Devonian or Early Mississippian in age. Basin and Range faults originated in Pliocene and have been active in post-Pleistocene. Major polymetallic sulfide ores at Cortez are chiefly manto deposits in the Hamburg Dolomite, although large tonnages have been obtained from fissure veins associated with quartz porphyry dikes. ACCESSION NUMBER: 1965-018945 AUTHORS: Gilluly, James; Masursky, Harold COLLECTION AUTHORS: 27, Economic geology of ore deposits COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: aeromagnetic; areal geology; Bouguer gravity; Cenozoic; Cortez quadrangle; economic geology; faults; geologic; maps; Mesozoic; metal ores; Nevada; overthrust; Paleozoic; polymetallic ores; Roberts thrust; stratigraphy; United States; USGS ISSN: 8755-531X LANGUAGE: English MAP TYPE: Type: geologic maps PUBLISHER: U. S. Geological Survey, Reston, VA, United States USA PUBLICATION YEAR: 1965 RESEARCH PROGRAM: B 1175 SOURCE: U. S. Geological Survey Bulletin, Report: B 1175, 117 pp., 1965 UPDATE CODE: 1965 ---------------------------------------------------------------------------------------------------------- (Reference 222) GEOREF: 1966-015055 CODEN: BUGMAF COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. Reference

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includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States FEATURES: illus., table PUBLICATION TYPE: Serial; Analytic ABSTRACT: K-Ar age determinations on rocks in the Tucson Mountains indicate two main periods of volcanic activity. The Cat Mountain Rhyolite, Biotite Rhyolite, and Shorts Ranch Andesite, which comprise and older group, range in age from 57 m.y. to 70 m.y. and are Late Cretaceous to early Tertiary Laramide. K-Ar ages of 71 m.y. to 75 m.y. for the intrusive rocks near Amole Peak are close to that of the Cat Mountain Rhyolite. Rocks in the younger group range in age from 20 m.y. to 30 m.y. and are late Oligocene to Miocene. Similar isotopic ages of the mid-Tertiary rocks near Safford Peak and the Tumamoc Hill-'A' Mountain area suggest a closer relationship between these two sequences than previously thought. ACCESSION NUMBER: 1966-015055 AUTHORS: Bikerman, Michael; Damon, Paul E COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Arizona; dates; igneous rocks; Pima County Arizona; Tucson Mountains; United States; volcanic activity ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America GSA, Boulder, CO, United States USA PUBLICATION YEAR: 1966 SOURCE: Geological Society of America Bulletin, vol.77, no.11, pp.1225-1234, 1966 TITLE: K/Ar chronology of the Tucson Mountains, Pima County, Arizona UPDATE CODE: 1966 ---------------------------------------------------------------------------------------------------------- (Reference 223) GEOREF: 1969-024581 CODEN: BUGMAF COLLECTION AUTHORS: 03 Geochronology; 16 Structural geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: geol. sketch map PUBLICATION TYPE: Serial; Analytic ABSTRACT: Absolute ages ranging from 72.2 ACCESSION NUMBER: 1969-024581 AUTHORS: Obradovich, John D; Mutschler, Felix E; Bryant, Bruce COLLECTION AUTHORS: 03 Geochronology; 16 Structural geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; age; Cenozoic; Colorado; Cretaceous; dates; Elk Mountains; igneous rocks; K/Ar; K/Ar data; Mesozoic; tectonics; Tertiary; United States; upper ISSN: 0016-7606 LANGUAGE: English SOURCE: Geological Society of America Bulletin, vol.80, no.9, pp.1749-1756, 1969 TITLE: Potassium-argon ages bearing on the igneous and tectonic history of the Elk mountains and vicinity, Colorado; a preliminary report UPDATE CODE: 1969 --------------------------------------------------------------------------------

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-------------------------- (Reference 224) GEOREF: 1970-000478 CODEN: GCACAK ACCESSION NUMBER: 1970-000478 AUTHORS: Armstrong-Richard-Lee BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology COUNTRY OF PUBLICATION: International DESCRIPTORS: absolute-age; accuracy-; basin-; Cenozoic-; dates-; igneous-rocks; intrusive-rocks; K-Ar; methods-; Nevada-; precision-; range-province; Tertiary-; tertiary-chronology; tertiary-volcanics; United-States; Utah-; utah-nevada; volcanic-rocks DOCUMENT TYPE: Serial ISSN: 0016-7037 LANGUAGE: English PUBLISHER: Pergamon. Oxford, International. 1970. PUBLICATION YEAR: 1970 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States SOURCE: Geochimica et Cosmochimica Acta. 34; 2, Pages 203-232. 1970. TITLE: Geochronology of tertiary igneous rocks, eastern basin and range province, western utah, eastern nevada, and vicinity, u.s.a. UPDATE CODE: 1970 ---------------------------------------------------------------------------------------------------------- (Reference 225) GEOREF: 1994-041859 CODEN: CSMQDN COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Drexler, John W; Larson, Edwin E FEATURES: References: 35; illus. incl. 8 tables, geol. sketch maps MONOGRAPH TITLE: Cenozoic volcanism in the Southern Rocky Mountains revisited; a tribute to Rudy C. Epis; Part 3 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: University of Colorado, Department of Geological Sciences, Boulder, CO, United States USA ACCESSION NUMBER: 1994-041859 AUTHORS: Larson, Edwin E; Drexler, John W COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkalic composition; Colorado; Denver Basin; Denver Formation; Front Range; igneous rocks; Laramide Orogeny; mafic composition; major elements; Middle Park Formation; petrography; trace elements; United States; volcanic rocks; Windy Gap Member ISSN: 0163-9153 LANGUAGE: English SOURCE: Colorado School of Mines Quarterly, vol.83, no.2, pp.41-52, 1988 TITLE: Early Laramide mafic to intermediate volcanism, Front Range, Colorado

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UPDATE CODE: 199420 ---------------------------------------------------------------------------------------------------------- (Reference 226) GEOREF: 1995-007900 CODEN: TCTOAM LATITUDE LONGITUDE: LAT| N400000; N405500; LONG: W1144500; W1154000. ABSTRACT: The northern East Humboldt Range NEHR of northeastern Nevada exposes a suite of complexly deformed migmatitic, upper amphibolite-facies rocks in the footwall of the Ruby Mountains-East Humboldt Range RM-EHR detachment fault. New super 40 Ar/ super 39 Ar data on hornblende, muscovite, biotie, and potassium feldspar help constrain the kinematic and thermal evolution of this terrain during Tertiary extensional exhumation. Hornblende samples from relatively high structural levels yield discordant age spectra that suggest initial cooling during early Tertiary time 63-49 Ma. When coupled with petrological constraints indicating a strongly decompressional P-T-t path above 550 degrees C, the hornblende data suggest that exhumation of the RM-EHR may have initiated in early Tertiary time, approximately coincident with the initial phases of unroofing in the Wood Hills immediately to the east and with the end of thrusting in the late Mesozoic to early Tertiary Sevier orogenic belt of eastern Nevada and western Utah. This temporal coincidence suggests that gravitational collapse of tectonically thickened crust in the internal zone of the Sevier belt could have driven the initial phases of unroofing. Thermal history during the final stage of exhumation of the NEHR is constrained by discordant hornblende cooling ages of 36-29 Ma from deep structural levels and biotite, muscovite, and potassium feldspar cooling ages of 27-21 Ma from a range of structural levels. Comparison of muscovite, biotite, and potassium feldspar cooling ages with previously published fission-track cooling ages implies very rapid cooling rates at temperatures below the closure temperature for muscovite 270 degrees -350 degrees C, but time gaps of >7 m.y. between hornblende and mica cooling ages suggest that cooling at higher temperatures was more gradual. In addition, comparison of super 40 Ar/ super 39 Ar mica cooling ages with previously published fission-track apatite cooling ages suggests pronounced thermal gradients between the NEHR and adjacent areas during latest Oligocene to earliest Miocene time. Such thermal gradients could be readily explained if the RM-EHR detachment fault dipped >30 degrees between the 300 degrees C and 100 degrees C isotherms. Finally, super 40 Ar/ super 39 Ar biotite cooling ages increase southward through the East Humboldt Range, compatible with northward extrapolation of a previously recognized pattern of WNW-younging biotite cooling ages from the Ruby Mountains. A simple model involving the propagation of footwall uplift in the direction of tectonic transport beneath an initially listric normal fault can explain the principle features of the Oligocene to Miocene thermochronologic data set for the RM-EHR. AUTHOR AFFILIATION: University of Wyoming, Department of Geology and Geophysics, Laramie, WY, United States ACCESSION NUMBER: 1995-007900 AUTHORS: McGrew-Allen-J; Snee-Lawrence-W BOOK AUTHORS: Seranne-Michel editor; Malavieille-Jacques editor BOOK TITLE: In: Late orogenic extension. BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology; 16-Structural-geology CONFERENCE INFORMATION: Late orogenic extension in mountain belts. Montpellier, France. March 4-6, 1993.

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COUNTRY OF PUBLICATION: Netherlands DESCRIPTORS: absolute-age; alkali-feldspar; amphibole-group; amphibolite-facies; Ar-Ar; biotite-; Cenozoic-; chain-silicates; clinoamphibole-; cooling-; dates-; detachment-faults; East-Humboldt-Range; Elko-County-Nevada; exhumation-; facies-; faults-; feldspar-group; foot-wall; framework-silicates; geothermal-gradient; heat-flow; hornblende-; K-feldspar; metamorphic-core-complexes; metamorphic-rocks; mica-group; migmatites-; Miocene-; muscovite-; Neogene-; Nevada-; northeastern-Nevada; Oligocene-; Paleogene-; Ruby-Mountains; sheet-silicates; silicates-; Tertiary-; thermal-history; United-States; White-Pine-County-Nevada DOCUMENT TYPE: Serial; Conference-Document ILLUSTRATION: Refs 59; illus. incl. sect., block diag., 1 table, geol. sketch map. ISSN: 0040-1951 LANGUAGE: English PUBLISHER: Elsevier. Amsterdam, Netherlands. 1994. PUBLICATION YEAR: 1994 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Tectonophysics. 238; 1-4, Pages 425-450. 1994. TITLE: super 40 Ar/ super 39 Ar thermochronologic constraints on the tectonothermal evolution of the northern East Humboldt Range metamorphic core complex, Nevada. UPDATE CODE: 199503 ---------------------------------------------------------------------------------------------------------- (Reference 227) GEOREF: 1995-012837 CODEN: XDIGAS LATITUDE LONGITUDE: LAT| N414000; N414000; LONG: W1164000; W1173000. AUTHOR AFFILIATION: U. S. Geological Survey, Denver, CO, United States ACCESSION NUMBER: 1995-012837 AUTHORS: Wallace-Alan-R; McKee-E-H BOOK AUTHORS: Berger-Byron-R editor BOOK TITLE: In: Advances in research on mineral resources, 1994. BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Cenozoic-; dates-; Elko-County-Nevada; Eocene-; eruptions-; Humboldt-County-Nevada; igneous-rocks; K-Ar; Miocene-; Neogene-; Nevada-; northern-Nevada; Oligocene-; Paleogene-; pyroclastics-; Snowstorm-Mountains; Tertiary-; United-States; USGS-; volcanic-fields; volcanic-rocks; volcanism-; welded-tuff DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs 26; 1 table, sketch map. ISSN: 8755-531X LANGUAGE: English PUBLISHER: U. S. Geological Survey. Reston, VA, United States. 1994. PUBLICATION YEAR: 1994 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: B 2081 RESEARCH PROGRAM: USGS Publications of the U. S. Geological Survey

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SOURCE: U. S. Geological Survey Bulletin. Pages 13-18. 1994. TITLE: Implications of Eocene through Miocene ages for volcanic rocks, Snowstorm Mountains and vicinity, northern Nevada. UPDATE CODE: 199505 ---------------------------------------------------------------------------------------------------------- (Reference 228) GEOREF: 1995-025431 CODEN: CHGEAD LATITUDE LONGITUDE: LAT| N321000; N343000; LONG: W1063000; W1090300. AUTHOR AFFILIATION: Open University, Department of Earth Sciences, Milton Keynes, United Kingdom ACCESSION NUMBER: 1995-025431 AUTHORS: Davis-Jon-M; Hawkesworth-Chris-J BIB LEVEL: Analytic CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 05A-Igneous-and-metamorphic-petrology; 16-Structural-geology COUNTRY OF PUBLICATION: Netherlands DESCRIPTORS: absolute-age; alkali-basalts; alkali-olivine-basalt; alkaline-earth-metals; asthenosphere-; basalts-; calc-alkalic-composition; Catron-County-New-Mexico; Cenozoic-; chemical-ratios; continental-crust; crust-; dates-; Datil-Mogollon-volcanic-field; Dona-Ana-County-New-Mexico; extension-tectonics; genesis-; geochemistry-; Grant-County-New-Mexico; igneous-rocks; isotope-ratios; isotopes-; lava-; lead-; lithogeochemistry-; lithosphere-; Luna-County-New-Mexico; magmas-; major-elements; mantle-; mantle-plumes; metals-; New-Mexico; Pb-206-Pb-204; Pb-207-Pb-204; Pb-Pb; plate-tectonics; radioactive-isotopes; rare-earths; Sierra-County-New-Mexico; Socorro-County-New-Mexico; southwestern-New-Mexico; Sr-87-Sr-86; stable-isotopes; strontium-; tectonics-; trace-elements; United-States; volcanic-fields; volcanic-rocks; volcanism DOCUMENT TYPE: Serial ILLUSTRATION: Refs 64; illus. incl. 4 tables, geol. sketch map. ISSN: 0009-2541 LANGUAGE: English PUBLISHER: Elsevier. Amsterdam, Netherlands. 1995. PUBLICATION YEAR: 1995 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands SOURCE: Chemical Geology. 119; 1-4, Pages 31-53. 1995. TITLE: Geochemical and tectonic transitions in the evolution of the Mogollon-Datil volcanic field, New Mexico, U.S.A. UPDATE CODE: 199509 ---------------------------------------------------------------------------------------------------------- (Reference 229) GEOREF: 1995-027378 CODEN: XDIGAS ABSTRACT: Sixty-three fission track and K-Ar age determinations are combined with recent geochemical, isotopic, geochronologic, and tectonic studies, to

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better understand the processes that formed the intrusive rocks and related ore deposits of the Colorado mineral belt CMB. The data helped to 1 document the temporal and spatial evolution of magmatic activity along the CMB, 2 recognize multiple igneous/mineralization events at individual centers, and 3 understand the tectonic-magmatic processes that formed in igneous centers and mineral deposits. ACCESSION NUMBER: 1995-027378 BOOK AUTHORS: Cunningham-Charles-G; Naeser-Charles-W; Marvin-Richard-F; Luedke-Robert-G; Wallace-Alan-R BOOK AUTHOR AFFILIATION: U. S. Geological Survey, USA, United States BOOK TITLE: Ages of selected intrusive rocks and associated ore deposits in the Colorado mineral belt. BIB LEVEL: Monograph CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits; 03-Geochronology; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; apatite-; bibliography-; Cenozoic-; Colorado-; Colorado-mineral-belt; Cretaceous-; dates-; fission-track-dating; geochronology-; hydrothermal-alteration; hydrothermal-processes; igneous-processes; igneous-rocks; intrusions-; K-Ar; Lake-County-Colorado; Laramide-Orogeny; Leadville-mining-district; Mesozoic-; metal-ores; metasomatism-; mineral-deposits,-genesis; nesosilicates-; orthosilicates-; phosphates-; silicates-; stocks-; Tertiary-; titanite-; United-States; Upper-Cretaceous; USGS-; western-Colorado; zircon- DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs 160; 2 tables, sketch maps. ISSN: 8755-531X LANGUAGE: English PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 31. 1994. PUBLICATION YEAR: 1994 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: B 2109 RESEARCH PROGRAM: USGS Publications of the U. S. Geological Survey SOURCE: U. S. Geological Survey Bulletin. 1994. . UPDATE CODE: 199510 URL: Availability http: //ngmsvr.wr.usgs.gov/Prodesc/proddesc_22405.htm ---------------------------------------------------------------------------------------------------------- (Reference 230) GEOREF: 1995-033125 CODEN: ECGLAL AUTHOR AFFILIATION: University of Michigan, Department of Geological Sciences, Ann Arbor, MI, United States ACCESSION NUMBER: 1995-033125 AUTHORS: Arehart-G-B; Foland-K-A; Naeser-C-W; Kesler-S-E BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits; 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Ar-Ar; Carlin-Trend; Cenozoic-; Cretaceous-; dates-; extension-tectonics; faults-; fission-track-dating; gold-ores; host-rocks; hydrothermal-alteration; hydrothermal-processes; Jurassic-; K-Ar; Mesozoic-; metal-ores; metasomatism-; mineral DOCUMENT TYPE: Serial

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ILLUSTRATION: Refs ISSN: 0361-0128 LANGUAGE: English ANNOTATION: For reference to discussion see Ilchik, Robert P., Econ. Geol., Vol. 90, No. 1, p. 208-210, Feb. 1995; for reference to original see Arehart, G. B., Foland, K. A., Naeser, C. W. and Kesler, S. E., Econ. Geol., Vol. 88, p. 622-646, 1993. PUBLISHER: Economic Geology Publishing Company. Lancaster, PA, United States. 1995. PUBLICATION YEAR: 1995 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists. 90; 1, Pages 210-212. 1995. TITLE: (super 40) Ar/ (super 39) Ar, K/ Ar, and fission-track geochronology of sediment-hosted disseminated gold deposits at Post-Betze, Carlin Trend, northeastern Nevada; reply. UPDATE CODE: 199512 ---------------------------------------------------------------------------------------------------------- (Reference 231) GEOREF: 1995-070847 CODEN: JPTGAD AUTHOR AFFILIATION: University of California at Berkeley, Department of Geology and Geophysics, Berkeley, CA, United States ACCESSION NUMBER: 1995-070847 AUTHORS: Lassiter-J-C; DePaolo-D-J; Mahoney-J-J BIB LEVEL: Analytic CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-Kingdom DESCRIPTORS: alkaline-earth-metals; basalts-; British-Columbia; Canada-; continental-crust; crust-; flood-basalts; fractional-crystallization; geochemistry-; igneous-rocks; isotopes-; lead-; lithosphere-; magmas-; major-elements; mantle-plumes; metals-; North-America; oceanic-crust; partial-melting; Pb-206-Pb-204; radioactive-isotopes; Sr-87-Sr-86; stable-isotopes; strontium-; trace-elements; Vancouver-Island; volcanic-rocks; Western-Canada; Wrangellia- DOCUMENT TYPE: Serial ILLUSTRATION: Refs 72; illus. incl. sketch maps. ISSN: 0022-3530 LANGUAGE: English PUBLISHER: Clarendon Press. Oxford, United Kingdom. 1995. PUBLICATION YEAR: 1995 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Journal of Petrology. 36; 4, Pages 983-1009. 1995. TITLE: Geochemistry of the Wrangellia flood basalt province; implications for the role of continental and oceanic lithosphere in flood basalt genesis. UPDATE CODE: 199524 ----------------------------------------------------------------------------------------------------------

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(Reference 232) GEOREF: 1996-012230 COLLECTION AUTHORS: 03 Geochronology; 16 Structural geology; 05A Igneous and metamorphicpetrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Vallier, Tracy L; Brooks, Howard C FEATURES: References: 109; illus. incl. sects., 4 tables, geol. sketch maps LATITUDE LONGITUDE: Latitude:N451500,N455000 Longitude:W1154000,W1163500 MONOGRAPH TITLE: Geology of the Blue Mountains region of Oregon, Idaho, and Washington;petrology and tectonic evolution of pre-Tertiary rocks of the BlueMountains region PUBLICATION TYPE: Serial; Report; Analytic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geological Survey, USA, United States ACCESSION NUMBER: 1996-012230 AUTHORS: Snee, Lawrence W; Lund, Karen; Sutter, John F; Balcer, David E; Evans,Karl V COLLECTION AUTHORS: 03 Geochronology; 16 Structural geology; 05A Igneous and metamorphicpetrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; amphibole group; Ar/Ar; batholiths; Blue Mountains;chain silicates; clinoamphibole; dates; deformation; emplacement;high-grade metamorphism; hornblende; Idaho; Idaho Batholith; IdahoCounty Idaho; igneous rocks; intrusions; island arcs; Mesozoic;metamorphic rocks; metamorphism; mica group; plutonic rocks; plutons;Salmon River; sheet silicates; silicates; suture zones; tectonics;terranes; United States; uplifts; USGS; west-central Idaho ISSN: 1044-9612 LANGUAGE: English PUBLICATION YEAR: 1995 RESEARCH PROGRAM: P 1438 SOURCE: U. S. Geological Survey Professional Paper, Report: P 1438,pp.359-414, 1995 TITLE: An super 40 Ar/ super 39 Ar chronicle of the tectonic developmentof the Salmon River suture zone, western Idaho UPDATE CODE: 1996 ---------------------------------------------------------------------------------------------------------- (Reference 233) GEOREF: 1996-041102 COLLECTION AUTHORS: 03 Geochronology; 16 Structural geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 92; illus. incl. 9 tables, sketch maps LATITUDE LONGITUDE: Latitude:N383800,N384500 Longitude:W1152000,W1153000 MONOGRAPH TITLE: Timing and effect of detachment-related potassium metasomatism on super 40 Ar/ super 39 Ar ages from the Windous Butte Formation, Grant Range, Nevada PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: Whole-rock chemical analyses and super 40 Ar/ super 39 Ar geochronologic data on mineral separates from correlative potassium-metasomatized and unaltered ash-flow tuff from the Windous Butte Formation are

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presented. The effect of potassium metasomatism, which commonly affects upper-plate rocks at detachment faults in the Western United States, on rock chemistry is well known. However, structural implications and conclusions regarding thermal effects associated with this type of alteration on dates from these altered upper-plate rocks was previously hampered by the the absence of data from correlative, unaltered volcanic units. Results of this study indicate that 1 temperatures of the hydrothermal fluids that contributed the excess potassium did not exceed the resetting temperature of biotite 280 degrees C, 2 alteration of feldspars ranges from incipient to pervasive, and 3 the detachment-fault conduit was closed to hydrothermal circulation at 20 Ma in the Grant Range. Detachment in the Grant Range is, therefore, bracketed between 31 Ma, the regional age of the Windous Butte Formation, and 20 Ma, the age of adularia introduced during detachment-related potassium metasomatism. AUTHOR AFFILIATION: U. S. Geological Survey, USA, United States ACCESSION NUMBER: 1996-041102 AUTHORS: Brooks, William E; Snee, Lawrence W COLLECTION AUTHORS: 03 Geochronology; 16 Structural geology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; adularia; alkali feldspar; Ar/Ar; ash-flow tuff; biotite; Cenozoic; dates; detachment faults; faults; feldspar group; framework silicates; geochemistry; Grant Range; hydrothermal alteration; igneous rocks; metaigneous rocks; metamorphic rocks; metasomatism; metatuff; metavolcanic rocks; mica group; middle Tertiary; Miocene; Neogene; Nevada; Nye County Nevada; Oligocene; overprinting; Paleogene; pyroclastics; sheet silicates; silicates; southern Nevada; Tertiary; United States; USGS; volcanic rocks; whole rock; Windous Butte Formation ISSN: 8755-531X LANGUAGE: English PUBLICATION YEAR: 1996 RESEARCH PROGRAM: B 2154 SOURCE: U. S. Geological Survey Bulletin, Report: B 2154, 25 pp., 1996 UPDATE CODE: 199614 ---------------------------------------------------------------------------------------------------------- (Reference 234) GEOREF: 1996-047285 COLLECTION AUTHORS: 03 Geochronology; 06A Sedimentary petrology; 12 Stratigraphy COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Scale: 1|24,000. Type: geologic maps FEATURES: References: 30; illus. incl. 2 tables LATITUDE LONGITUDE: Latitude:N442300,N455300 Longitude:W1112700,W1135600 MONOGRAPH TITLE: super 40 Ar/ super 39 Ar ages of some Challis Volcanic Group rocksand the initiation of Tertiary sedimentary basins in southwesternMontana PUBLICATION TYPE: Serial; Report; Map; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: super 40 Ar/ super 39 Ar ages of single sanidine, biotite, andplagioclase crystals were obtained from eighteen samples of rhyoliticintrusives, tuffs, and ash-flow tuffs from southwestern Montana. Thesevolcanic rocks are part of a thick volcanic sequence in severaltopographic basins and in adjacent highlands. The analyses show thatthe volcanic rocks were emplaced between about 48.76+ or -0.17 Ma and45.04+ or -13 Ma and are temporally correlative with the EoceneChallis Volcanic Group of central Idaho. AUTHOR AFFILIATION: U. S. Geological Survey, Denver, CO, United States USA

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ACCESSION NUMBER: 1996-047285 AUTHORS: M'Gonigle, John W; Dalrymple, G Brent COLLECTION AUTHORS: 03 Geochronology; 06A Sedimentary petrology; 12 Stratigraphy COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; alkali feldspar; Ar/Ar; ash-flow tuff; basins;Beaverhead County Montana; biotite; Cenozoic; Challis Volcanics;correlation; dates; depositional environment; emplacement; Eocene;feldspar group; fluvial environment; framework silicates; geologicmaps; igneous rocks; lacustrine environment; maps; mica group;Montana; North America; Paleogene; paludal environment; plagioclase;pyroclastics; rhyolites; Rocky Mountains; sanidine; sedimentarybasins; sedimentation; sheet silicates; silicates; single-crystalmethod; southwestern Montana; Tertiary; tuff; U. S. Rocky Mountains;United States; USGS; volcanic rocks ISSN: 8755-531X LANGUAGE: English PUBLICATION YEAR: 1996 RESEARCH PROGRAM: B 2132 SOURCE: U. S. Geological Survey Bulletin, Report: B 2132, 17 pp., 1 sheet,1996 UPDATE CODE: 199616 ---------------------------------------------------------------------------------------------------------- (Reference 235) GEOREF: 1967-017426 CODEN: ECGLAL COLLECTION AUTHORS: 27, Economic geology of ore deposits COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States FEATURES: tables PUBLICATION TYPE: Serial; Analytic ACCESSION NUMBER: 1967-017426 AUTHORS: Moorbath, S; Hurley, P M; Fairbairn, H W COLLECTION AUTHORS: 27, Economic geology of ore deposits COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: absolute age; alkaline earth metals; Arizona; Colorado; dates; genesis; geochemical methods; granitic; granitic composition; igneous processes; igneous rocks; initial; isotopes; laramide intrusives; magmas; metals; mineral deposits, genesis; mineral exploration; mineralized intrusives; New Mexico; petrology; ratios; southwestern; strontium; strontium isotope data; Strontium-isotope ratios; United States ISSN: 0361-0128 LANGUAGE: English PUBLICATION YEAR: 1967 SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists, vol.62, no.2, pp.228-236, 1967 TITLE: Evidence for the origin and age of some mineralized Laramide intrusives in the Southwestern United States from Strontium isotope and rubidium-strontium measurements UPDATE CODE: 1967 ----------------------------------------------------------------------------------------------------------

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(Reference 236) GEOREF: 1971-060995 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: The petrology and geochemical variability of the Audubon-Albion stock, Boulder County, Colorado ORGANIZATION: Case Western Reserve University, Cleveland, OH, United States (USA) PAGES DATE: 272 pp. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic ACCESSION NUMBER: 1971-060995 AUTHORS: Mathews, Geoffrey William COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: Audubon-Albion stock; Audubon-Albion stock; Boulder County Colorado; Cenozoic; Colorado; gabbros; genesis; geochemistry; igneous rocks; intrusions; monzonites; petrology; plutonic; plutonic rocks; statistical analysis; stocks; syenites; Tertiary; trend-surface analysis; United States LANGUAGE: English PUBLICATION YEAR: 1970 UPDATE CODE: 1971 ---------------------------------------------------------------------------------------------------------- (Reference 237) GEOREF: 1978-017764 CODEN: XGROAG COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: table LATITUDE LONGITUDE: Latitude:N371400,N400800 Longitude:W1052000,W1084700 MONOGRAPH TITLE: New ages for intrusive rocks in the Colorado mineral belt PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ACCESSION NUMBER: 1978-017764 AUTHORS: Cunningham, C G; Naeser, C W; Marvin, R F AVAILABILITY: U. S. Geol. Surv., Open-File Serv. Sect., Br. Distrib., Denver, Colo., United States COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: absolute age; Boulder County Colorado; Cenozoic; Clear Creek County Colorado; Colorado; Cretaceous; data; dates; Dolores County Colorado; Eagle County Colorado; fission-track dating; geochronology; Gilpin County Colorado; Gunnison County Colorado; hydrothermal alteration; hydrothermal processes; intrusions; K/Ar; La Plata County Colorado; Lake County Colorado; Mesozoic; metal ores; metasomatism; Mineral County Colorado; minerals; Montezuma County Colorado; ore deposits; Ouray County Colorado; Pitkin County Colorado; Summit County Colorado; Tertiary; United States; USGS ISSN: 0196-1497 LANGUAGE: English PUBLICATION YEAR: 1977 RESEARCH PROGRAM: OF 77-0573

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SOURCE: Open-File Report - U. S. Geological Survey, Report: OF 77-0573, 7 pp., 1977 UPDATE CODE: 1978 ---------------------------------------------------------------------------------------------------------- (Reference 238) GEOREF: 1965-017438 CODEN: JGEOAZ COLLECTION AUTHORS: 03 Geochronology; 12 Stratigraphy COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. Referenceincludes data from Bibliography and Index of North American Geology,U. S. Geological Survey, Reston, VA, United States PUBLICATION TYPE: Serial; Analytic ACCESSION NUMBER: 1965-017438 AUTHORS: Smedes, Harry W; Thomas, Herman H COLLECTION AUTHORS: 03 Geochronology; 12 Stratigraphy COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Cenozoic; dates; eocene age; igneous rocks; lowlandcreek volcanics; Montana; southwestern; stratigraphy; Tertiary; UnitedStates ISSN: 0022-1376 LANGUAGE: English PUBLICATION YEAR: 1965 SOURCE: Journal of Geology, vol.73, no.3, pp.508-510, 1965 TITLE: Reassignment of the lowland creek volcanics to eocene age UPDATE CODE: 1965 ---------------------------------------------------------------------------------------------------------- (Reference 239) GEOREF: 1984-027336 CODEN: XGROAG COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 6; 499 anal., sketch map PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, CA, United States USA AUTHORS: Bateman, Paul C; Dodge, Franklin C W; Bruggman, Peggy E COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: California; chemical composition; composition; compositon; data; density; Fresno County California; igneous rocks; Inyo County California; Madera County California; major elements; Mariposa County California; Mariposa Sheet; mineral composition; modal analysis; Mono County California; oxides; petrology; plutonic rocks; Sierra Nevada; specific gravity; textures; Tuolumne County California; United States; USGS ISSN: 0196-1497 LANGUAGE: English PUBLISHER: U. S. Geological Survey, Reston, VA, United States USA

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PUBLICATION YEAR: 1984 SOURCE: Open-File Report - U. S. Geological Survey, Report: OF 84-0162, 59 pp., 1984 TITLE: Major oxide analyses, CIPW norms, modes, and bulk specific gravities of plutonic rocks from the Mariposa 1 degrees by 2 degrees sheet, central Sierra Nevada, California UPDATE CODE: 1984 ---------------------------------------------------------------------------------------------------------- (Reference 240) GEOREF: 1991-048821 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Geology and stratigraphy of the Mount Bennett Hills, and the origin ofwest-central Snake River plain rhyolites ORGANIZATION: Rice University, Houston, TX, United States USA PAGES DATE: 268 pp. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic ACCESSION NUMBER: 1991-048821 AUTHORS: Honjo, Norio AVAILABILITY: University Microfilms, Ann Arbor, MI, United States USA COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02D Isotope geochemistry COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: alkaline earth metals; basalts; Cenozoic; Cretaceous; fluvialenvironment; fractional crystallization; grabens; Idaho; IdahoBatholith; Idavada Volcanics; igneous rocks; isotopes; lacustrineenvironment; magmas; major elements; Mesozoic; metals; mineralassemblages; Miocene; Mount Bennett Hills; Nd-144/Nd-143; neodymium;Neogene; partial melting; petrology; rare earths; rhyolites; SnakeRiver plain; Sr-87/Sr-86; stable isotopes; stratigraphy; strontium;Tertiary; trace elements; unconformities; United States; volcanicrocks LANGUAGE: English PUBLICATION YEAR: 1990 UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 241) GEOREF: 2004-052910 CODEN: TCTNDM COLLECTION AUTHORS: Structural geology, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 83; illus. incl. 5 tables LATITUDE LONGITUDE: L PUBLICATION TYPE: serial analytic SPONSOR: Tectonics ABSTRACT: We present new field, structural, petrographic, and geochronologic data on a rare midcrustal (?25 km) exposure of a Cordilleran arc, the Coast Ridge Belt, located in the Santa Lucia Mountains of central California. The

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study area is composed primarily of a deformed suite of upper amphibolite to granulite facies rocks (the ?Sur Series?), which is dominated by metaigneous tonalites, diorites, and gabbros with subordinate metasedimentary quartzite and marble. Inherited zircons in magmatic rocks suggest that the provenance of framework rocks is drawn heavily from miogeoclinal formations and that sedimentation occurred in the late Paleozoic or later. Minor magmatism in the Coast Ridge Belt began in the Early or Middle Cretaceous, but magmatic activity was most intense during a short period time from 93 to 81 Ma, based on U-Pb zircon ages of a felsic gneiss and two less-deformed diorites. The time period 93?81 Ma also brackets a period of extensive thickening and high-temperature ductile deformation. While a thrusting cause for ductile deformation cannot be ruled out, we favor the hypothesis that the exposed rocks correspond to a zone of return flow of supracrustal rocks locally displaced by granitoid plutons in the shallower crust. Magmatism ended throughout Salinia between 81 and 76 Ma, coincident with the attainment of peak pressure and temperature conditions of 0.75 GPa and 800°C. Exhumation followed immediately, bringing the Coast Ridge Belt to the surface within 8 My at a rate of at least 2?3 mm/yr. Exhumation was coincident with an episode of extensional collapse that has been documented elsewhere in the southern California arc during the early Laramide orogeny and that may be related to underthrusting of the forearc at that time. AUTHOR AFFILIATION: University of Arizona, Department of Geosciences, Tucson, AZ, United States; ACCESSION NUMBER: 2004-052910 AUTHORS: Kidder, S; Ducea, M; Gehrels, G; Patchett, P J; Vervoort, J BIB LEVEL: Analytic CATEGORY CODES: 16-Structural-geology; 05A-Igneous-and-metamorphic-petrology COLLECTION AUTHORS: Structural geology, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States DESCRIPTORS: absolute age; amphibolite facies; batholiths; California; Central California; Coast Ranges; Coast Ridge Belt; crust; deformation; facies; faults; granites; granulite facies; igneous rocks; intrusions; magmatism; metamorphic rocks; middle crust; nesosilicates; North America; North American Cordillera; orthosilicates; Paleozoic; petrography; plutonic rocks; Salinian Block; San Andreas Fault; Santa Luca Mountains; silicates; subduction zones; tectonics; thrust faults; U/Pb; United States; upper Paleozoic; zircon; zircon group DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 83; illus. incl. 5 tables. ISSN: 0278-7407 LANGUAGE: English PUBLISHER: American Geophysical Union, Washington, DC PUBLICATION YEAR: 2003 REFERENCE SOURCE: GeoRef, Copyright 2004, American Geological Institute. SOURCE: 22(5) (October 2003) TITLE: Tectonic and magmatic development of the Salinian Coast Ridge Belt, California UPDATE CODE: 2003 ---------------------------------------------------------------------------------------------------------- (Reference 242) GEOREF: 2004-027844 CODEN: XGROAG LATITUDE LONGITUDE: LAT: N330000; N340000; LONG: W1160000; W1173000. ACCESSION NUMBER: 2004-027844

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BOOK AUTHORS: Kistler-R-W; Wooden-J-L; Morton-D-M BOOK AUTHOR AFFILIATION: U. S. Geological Survey, Menlo Park, CA, United States BOOK TITLE: Isotopes and ages in the northern Peninsular Ranges Batholith, Southern California. BIB LEVEL: Monograph CATEGORY CODES: 02D-Isotope-geochemistry; 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkaline-earth-metals; batholiths-; California-; Cretaceous-; dates-; intrusions-; isotope-ratios; isotopes-; Jurassic-; lead-; Mesozoic-; metals-; North-America; O-18-O-16; oxygen-; Pb-206-Pb-204; Peninsular-Ranges-Batholith; radioactive-isotopes; Rb-Sr; Southern-California; Sr-87-Sr-86; stable-isotopes; strontium-; U-Pb; United-States; USGS- DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs: 49; illus. incl. 3 tables, geol. sketch maps. ISSN: 0196-1497 LANGUAGE: English SOURCE MEDIUM: WWW ANNOTATION: Accessed on March 10, 2004. PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 45. 2003. PUBLICATION YEAR: 2003 REFERENCE SOURCE: GeoRef, Copyright 2004, American Geological Institute. REPORT NUMBER: OF 03-0489 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: Open-File Report - U. S. Geological Survey. 2003. UPDATE CODE: 200408 URL: (Full text) http://geopubs.wr.usgs.gov/open-file/of03-489/ ---------------------------------------------------------------------------------------------------------- (Reference 243) GEOREF: 1987-054474 MAP TYPE: geologic-maps ACCESSION NUMBER: 1987-054474 BOOK AUTHORS: Hagen-Randall-Alan BOOK TITLE: The geology and petrology of the Northcraft Formation, Lewis County, Washington. BIB LEVEL: Monograph CATEGORY CODES: 13-Areal-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: andesitic-composition; areal-geology; basaltic-composition; breccia-pipes; Cenozoic-; dikes-; distribution-; Eocene-; geologic-maps; intrusions-; lava-; Lewis-County-Washington; maps-; Northcraft-Formation; Paleogene-; pipes-; sills-; southwestern-Washington; stratigraphy-; Tertiary-; United-States; Washington- DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: University of Oregon. Eugene, OR, United States. DOCUMENT TYPE: Thesis-or-Dissertation; Map ILLUSTRATION: Refs: 121; illus. incl. 8 tables, 48 plates. LANGUAGE: English MAP TYPE: geologic-maps MAP SCALE: 1:24,000 PUBLISHER: Pages: 252. 1987. PUBLICATION YEAR: 1987 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute.

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UPDATE CODE: 1987 ---------------------------------------------------------------------------------------------------------- (Reference 244) GEOREF: 1985-054392 LATITUDE LONGITUDE: LAT: N400000; N510000; LONG: W1203000; W1230000. ACCESSION NUMBER: 1985-054392 AVAILABILITY: University Microfilms, Ann Arbor, MI, United States BOOK AUTHORS: Power-Sara-Glen BOOK TITLE: The tops of porphyry copper deposits; mineralization and plutonism in the western Cascades, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: age-; Blue-River-District; Bohemia-District; Cascade-Range; Cenozoic-; controls-; copper-ores; Detroit-Dam-District; economic-geology; fluid-inclusions; geologic-thermometry; hydrothermal-alteration; igneous-processes; inclusions-; intrusions-; isotopes-; metal-ores; metasomatism-; mineral-deposits,-genesis; mineralization-; Miocene-; molybdenum-ores; Neogene-; North-Santonian-District; Oligocene-; ore-forming-fluids; Oregon-; Paleogene-; plutons-; porphyry-copper; Quartzville-District; S-34-S-32; stable-isotopes; sulfur-; Tertiary-; United-States; Washougal-District DEGREE GRANTED: Doctoral DEGREE GRANTING INSTITUTION: Oregon State University. Corvallis, OR, United States. Pages: 234. 1985. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1985 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 245) GEOREF: 1981-027883 LATITUDE LONGITUDE: LAT: N442000; N443500; LONG: W1220000; W1230000. MAP TYPE: geologic-maps ACCESSION NUMBER: 1981-027883 BOOK AUTHORS: Munts-Steven-Rowe BOOK TITLE: Geology and mineral deposits of the Quartzville mining district, Linn County, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Columbia-Plateau; economic-geology; geochemistry-; geologic-maps; geophysical-methods; geophysical-surveys; Linn-County-Oregon; magnetic-methods; maps-; metal-ores; mining-; Oregon-; Quartzville-District; structure-; surveys-; tectonics-; United-States; zoning- DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: University of Oregon. Eugene, OR, United States.

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DOCUMENT TYPE: Thesis-or-Dissertation; Map ILLUSTRATION: illus. incl. tables. LANGUAGE: English MAP TYPE: geologic-maps MAP SCALE: 1:12,000 PUBLISHER: Pages: 213. 1978. PUBLICATION YEAR: 1978 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 246) GEOREF: 1970-015658 CODEN: XGPPA9 COLLECTION AUTHORS: 03, Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: illus. PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: Potassium-argon age determinations, five intrusive epochs (middle-late Triassic, early-middle Jurassic, late Jurassic, early Cretaceous, late Cretaceous), analytic methods, geologic interpretation of age data, regional deformation associated with plutonic episodes, temporary marine regression correlated with granite emplacement. AUTHOR AFFILIATION: _NULL_ ACCESSION NUMBER: 1970-015658 AUTHORS: Evernden, J F; Kistler, R W BOOK AUTHORS: Evernden-J-F; Kistler-R-W BOOK TITLE: Chronology of emplacement of Mesozoic batholithic complexes in California and western Nevada. BIB LEVEL: Monograph CATEGORY CODES: 03-Geochronology COLLECTION AUTHORS: 03, Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; age-; batholiths-; California-; dates-; emplacement-; geochronology-; igneous-rocks; interpretation-; intrusions-; intrusive-rocks; K-Ar; Nevada-; United-States; USGS-; west- DOCUMENT TYPE: Serial; Report ILLUSTRATION: illus. ISSN: 1044-9612 LANGUAGE: English PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 42. 1970. PUBLICATION YEAR: 1970 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: P 0623 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: U. S. Geological Survey Professional Paper. 1970. TITLE: Chronology of emplacement of Mesozoic batholithic complexes in California and western Nevada UPDATE CODE: 1970 URL: (Availability) http://ngmsvr.wr.usgs.gov/Prodesc/proddesc_4948.htm

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---------------------------------------------------------------------------------------------------------- (Reference 247) GEOREF: 1992-015274 CODEN: EOSTAJ AUTHOR AFFILIATION: Hampshire Coll., Sch. Nat. Sci., Amherst, MA, United States ACCESSION NUMBER: 1992-015274 AUTHORS: Link-Timothy-E; Reid-J-B Jr.; Murray-D-P BOOK AUTHORS: Anonymous BOOK TITLE: In: AGU 1990 fall meeting. BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology CONFERENCE INFORMATION: American Geophysical Union, 1990 fall meeting. San Francisco, CA, United States. Dec. 3-7, 1990. COUNTRY OF PUBLICATION: United-States DESCRIPTORS: assimilation-; California-; Chickenfoot-Lake-Granodiorite; cumulates-; differentiation-; fractional-crystallization; gabbros-; granites-; granodiorites-; igneous-rocks; inclusions-; intrusions-; Inyo-County-California; mafic-composition; magmas-; petrolog DOCUMENT TYPE: Abstract; Serial; Conference-Document ISSN: 0096-3941 LANGUAGE: English PUBLISHER: American Geophysical Union. Washington, DC, United States. 1990. PUBLICATION YEAR: 1990 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Eos, Transactions, American Geophysical Union. 71; 43, Pages 1659. 1990. TITLE: Contact relationships of the Rock Creek Gabbro, Inyo County, CA; clues to the origin of the Sierra Nevadan mafic enclaves. UPDATE CODE: 1992 ---------------------------------------------------------------------------------------------------------- (Reference 248) GEOREF: 1970-015659 CODEN: XGPPA9 MAP TYPE: color-geologic-maps ABSTRACT: Eocene-Oligocene stratigraphy, younger Tertiary and Quaternary deposits, structure, bituminous and subbituminous coals, properties-reserves-mining history, other mineral resources (clay, construction material, mercury), oil and gas possibilities. ACCESSION NUMBER: 1970-015659 BOOK AUTHORS: Vine-James-D BOOK TITLE: Geology and coal resources of the Cumberland, Hobart, and Maple Valley quadrangles, King County, Washington. BIB LEVEL: Monograph CATEGORY CODES: 26-Economic-geology,-general COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Cenozoic-; coal-; Cumberland-; economic-geology; Hobart-; King-County-Washington; Maple-Valley; mineral-resources; organic-residues; sedimentary-rocks; Tertiary-; United-States; USGS-; Washington- DOCUMENT TYPE: Serial; Report; Map ILLUSTRATION: illus.

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ISSN: 1044-9612 LANGUAGE: English MAP TYPE: color-geologic-maps MAP SCALE: 1:24,000 OTHER DATES: 1970 PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 67. 1969. PUBLICATION YEAR: 1969 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: P 0624 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: U. S. Geological Survey Professional Paper. 1969. UPDATE CODE: 1970 URL: (Availability) http://ngmsvr.wr.usgs.gov/Prodesc/proddesc_4949.htm ---------------------------------------------------------------------------------------------------------- (Reference 249) GEOREF: 2006-900011 (unpublished Georef; Navdat only) AUTHORS: Smith-Steven-M SOURCE: http://pubs.usgs.gov/of/1997/ofr-97-0492/ TITLE: National Geochemical Database?eformatted Data from the National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) Program ---------------------------------------------------------------------------------------------------------- (Reference 250) GEOREF: 1978-007278 CODEN: XGLBAF LATITUDE LONGITUDE: LAT: N413000; N414500; LONG: W1223000; W1224500. MAP TYPE: color-geologic-maps ACCESSION NUMBER: 1978-007278 BOOK AUTHORS: Hotz-P-E BOOK AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States BOOK TITLE: Geology of the Yreka Quadrangle, Siskiyou County, California. BIB LEVEL: Monograph CATEGORY CODES: 13-Areal-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: areal-geology; California-; evolution-; faults-; geologic-maps; igneous-rocks; Klamath-Mountains; lithostratigraphy-; maps-; metamorphic-belts; metamorphic-rocks; Phanerozoic-; sedimentary-rocks; Siskiyou-County-California; stratigraphy-; structure-; tectonics-; thrust-faults; United-States; USGS-; volcanic-rocks; Yreka-Quadrangle DOCUMENT TYPE: Serial; Report; Map ILLUSTRATION: Refs: 61; illus. ISSN: 8755-531X LANGUAGE: English MAP TYPE: color-geologic-maps MAP SCALE: 1:62,500 PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 72. 1977. PUBLICATION YEAR: 1977

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REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: B 1436 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: U. S. Geological Survey Bulletin. 1977. UPDATE CODE: 1978 URL: (Availability) http://ngmsvr.wr.usgs.gov/Prodesc/proddesc_21546.htm ---------------------------------------------------------------------------------------------------------- (Reference 251) GEOREF: 1985-033616 CODEN: JGEOAZ COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 24; illus. incl. 6 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N453000,N470000 Longitude:W1140000,W1160000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. Mont., Dep. Geol., Missoula, MT, United States (USA) ACCESSION NUMBER: 1985-033616 AUTHORS: Hyndman, Donald W COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: batholiths; Bitterroot Lobe; Bitterroot Range; classification;Clearwater County Idaho; genesis; geochemical profiles; geochemistry;granites; granodiorites; Idaho; Idaho Batholith; Idaho County Idaho;igneous rocks; intrusions; magmas; North America; petrography;petrology; plutonic rocks; Rocky Mountains; U. S. Rocky Mountains;United States ISSN: 0022-1376 LANGUAGE: English PUBLICATION YEAR: 1984 SOURCE: Journal of Geology, vol.92, no.1, pp.83-102, Jan 1984 TITLE: A petrographic and chemical section through the northern IdahoBatholith UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 252) GEOREF: 2004-085330 CODEN: _NULL_ COLLECTION AUTHORS: Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 27; illus. incl. geol. sketch maps, 1 table, sect. PUBLICATION TYPE: serial analytic SPONSOR: Geophysical Research Letters ABSTRACT: [1] The Coast Ridge Belt (CRB, Santa Lucia Mts., central California) comprises mid-crustal rocks (750-800degreesC and 0.8 GPa) of the California magmatic arc. We estimated the bulk composition of the CRB and converted our results to seismic velocities expected at the observed pressures and temperatures. The bulk composition of this arc section changes abruptly at 25 km depth from a granodiorite to a quartz-diorite or diorite. These data are in agreement with results from other Cordilleran batholiths suggesting 1.5 to 2

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times thicker felsic columns than interpreted for modern continental arcs, and a relatively sharp transition from a felsic upper crustal batholith, and a mafic deep crust. This implied rheological boundary may have significant implications for intracrustal faulting or convective removal of the roots of batholiths. AUTHOR AFFILIATION: University of Arizona, Deptartment of Geosciences, Tucson, Arizona, United States AUTHORS: Mihai, Ducea N.; Kidder, Steven; Zandt, George COLLECTION AUTHORS: Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: batholiths; California; Coast Ridge Belt; crust; diorites; emplacement; faults; granites; granodiorites; igneous rocks; intrusions; mafic composition; plutonic rocks; rheology; Santa Lucia Range; United States ISSN: 0094-8276 LANGUAGE: English PUBLISHER: American Geophysical Union, Washington, DC PUBLICATION YEAR: 2003 SOURCE: 30(13) (July 01, 2003) TITLE: Arc composition at mid-crustal depths: insights from the Coast Ridge Belt, Santa Lucia Mountains, California UPDATE CODE: 2003 ---------------------------------------------------------------------------------------------------------- (Reference 253) GEOREF: 1997-034543 CODEN: BUGMAF COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology; 16 Structuralgeology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. Referenceincludes data supplied by the Geological Society of America, Boulder,CO, United States FEATURES: References: 75; illus. incl. 4 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N455000,N464500 Longitude:W1140000,W1150000 PUBLICATION TYPE: Serial; Analytic ABSTRACT: Granitic plutonism and extension are broadly contemporaneous in manymetamorphic core complexes. However, the relationship betweenmagmatism and extension is rarely unambiguous. The northern Idahobatholith (Idaho-Bitterroot batholith), Montana and Idaho, composesthe footwall for most of the Bitterroot metamorphic core complex andthus is an ideal area for assessing the relationships betweenmagmatism and extension. We analyzed zircon from six samples ofgranitic rock from the Idaho-Bitterroot batholith using the SHRIMP(II) ion microprobe. Three samples of mylonitic granite from the BearCreek pluton, Lost Horse Canyon, give a weighted mean (super 206) Pb/(super 238) U age of 54.3+ or -0.7 Ma. A protomylonitic granite fromthe central part of the Bitterroot core complex (also Bear Creekpluton) gives a similar (super 206) Pb/ (super 238) U age of 54.6+ or-0.8 Ma. Mylonitic megacrystic granite from Sweathouse Canyon yieldsan age of 63.6+ or -0.6 Ma. A granite sample from the Lochsa Canyon,in the central Idaho-Bitterroot batholith, gives an age of 56.7+ or-1.0 Ma. Inherited zircon from the granitoids ranges in age from 800to 1820 Ma, but the majority of grains have formation ages of1750-1800 Ma. This suggests that Paleoproterozoic crust dominates thesource region of the Idaho-Bitterroot batholith. Hornblende (super 40)Ar- (super 39) Ar age spectra for mafic dikes intruded duringlate-stage crystallization of main-phase granite in the centralIdaho-Bitterroot batholith suggest crystallization of the main-

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phaseplutons in this area at ca. 57 Ma. New and previously published (super40) Ar- (super 39) Ar and K-Ar apparent ages of biotite and muscovitefrom the Lochsa River area and the western and central Bitterroot corecomplex are 50 to 47 Ma. Younger mica ages (46-43 Ma) are restrictedto the vicinity of the Bitterroot mylonite zone. These resultsindicate that the cessation of main-phase magmatism within theBitterroot metamorphic core complex migrated east with time, and thatmost of the plutons in the core complex were intruded during thePaleocene and early Eocene. When the regional tectonic setting changedfrom compression to extension at ca. 50 Ma, the late stages ofmid-crustal, peraluminous plutonism appear to have been localizedwithin the Bitterroot core complex. The presence of the youngestmid-crustal plutons in this area may have focused extensionaldeformation leading to the thick mylonite zone, as a consequence ofrheological contrasts with cooler areas to the east and west. Aprogression of K-Ar and (super 40) Ar- (super 39) Ar cooling ages fromwest to east within the core complex part of the batholith isconsistent with top-to-the-east shear indicators in the mylonite zone.Thermochronology indicates that the western part of the Bitterrootmetamorphic core complex was below nearly equal 350 degrees C at thesame time as the last stage of granite emplacement and metamorphism inthe east. Therefore, the transition from mylonitization to brittledeformation to inactivity of the shear zone was progressive from westto east across the core complex from ca. 50 to 44 Ma. These featuresoffer an explanation for the previously enigmatic occurrence ofamphibolite facies ductile deformation in the eastern part of the corecomplex coincident with emplacement of epizonal, alkali-feldspargranite plutons along the western side of the complex. AUTHOR AFFILIATION: Australian National University, Australia (AUS) ACCESSION NUMBER: 1997-034543 AUTHORS: Foster, David A; Fanning, C Mark COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology; 16 Structuralgeology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: absolute age; Ar/Ar; batholiths; Bitterroot Range; Cenozoic;Clearwater County Idaho; cooling; dates; deformation; dikes; Eocene;extension; faults; granites; Idaho; Idaho Batholith; igneous activity;igneous rocks; intrusions; Lemhi County Idaho; lower Eocene;metamorphic core complexes; metamorphic rocks; metamorphism; Montana;mylonites; mylonitization; nesosilicates; North America; north-centralIdaho; orthosilicates; Paleocene; Paleogene; plutonic rocks; RavalliCounty Montana; Rocky Mountains; shear zones; SHRIMP data; silicates;Tertiary; thermal history; U. S. Rocky Mountains; U/Pb; United States;western Montana; zircon ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1997 SOURCE: Geological Society of America Bulletin, vol.109, no.4, pp.379-394, Apr1997 TITLE: Geochronology of the northern Idaho Batholith and the Bitterrootmetamorphic core complex; magmatism preceding and contemporaneous withextension UPDATE CODE: 199712 ---------------------------------------------------------------------------------------------------------- (Reference 254) GEOREF: 2002-019812 CODEN: XGROAG

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ACCESSION NUMBER: 2002-019812 AVAILABILITY: U. S. Geol. Surv., Denver, CO, United States BOOK AUTHORS: Kistler-R-W; Champion-D-E BOOK AUTHOR AFFILIATION: U. S. Geological Survey, Menlo Park, CA, United States BOOK TITLE: Rb-Sr whole-rock and mineral ages, K-Ar, (super 40) Ar/ (super 39) Ar, and U-Pb mineral ages, and strontium, lead, neodymium, and oxygen isotopic compositions for granitic rocks from the Salinian Composite Terrane, California. BIB LEVEL: Monograph CATEGORY CODES: 03-Geochronology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkaline-earth-metals; Ar-Ar; California-; Coast-Ranges; Cretaceous-; dates-; intrusions-; isotope-ratios; isotopes-; K-Ar; lead-; Mesozoic-; metals-; neodymium-; O-18-O-16; oxygen-; plutons-; rare-earths; Rb-Sr; Salinian-Block; Sierra-Nevada; stable-isotopes; strontium-; U-Pb; United-States; USGS-; whole-rock DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs: 45; illus. incl. 5 tables, geol. sketch maps. ISSN: 0196-1497 LANGUAGE: English PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 83. 2001. PUBLICATION YEAR: 2001 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: OF 01-0453 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: Open-File Report - U. S. Geological Survey. 2001. UPDATE CODE: 200208 URL: (Full text) http://geopubs.wr.usgs.gov/open-file/of01-453/ ---------------------------------------------------------------------------------------------------------- (Reference 255) GEOREF: 1992-039501 CODEN: BUGMAF LATITUDE LONGITUDE: LAT: N365955; N373400; LONG: W1220000; W1220900. AUTHOR AFFILIATION: Univ. Tex. at Austin, Bur. Econ. Geol., Austin, TX, United States ACCESSION NUMBER: 1992-039501 AUTHORS: James-Eric-William BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkaline-earth-metals; apatite-; California-; Central-California; Cretaceous-; dates-; emplacement-; evolution-; geochronology-; igneous-rocks; intrusions-; isotopes-; Mesozoic-; metals-; metamorphic-rocks; metamorphism-; metaplutonic-rocks; monazite-; nesosilicates-; orthosilicates-; phosphates-; plutonic-rocks; plutons-; Salinian-Block; San-Francisco-Bay-region; Santa-Cruz-County-California; Santa-Cruz-Mountains; Sierra-Nevada-Batholith; silicates-; Sr-87-Sr-86; stable-isotopes; strontium-; titanite-; U-Pb; United-States; zircon- DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 88; illus. incl. 3 tables, geol. sketch maps. ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States.

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1992. PUBLICATION YEAR: 1992 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Geological Society of America Bulletin. 104; 10, Pages 1326-1339. 1992. TITLE: Cretaceous metamorphism and plutonism in the Santa Cruz Mountains, Salinian Block, California, and correlation with the southernmost Sierra Nevada. UPDATE CODE: 1992 ---------------------------------------------------------------------------------------------------------- (Reference 256) GEOREF: 2002-069790 CODEN: CMPEAP LATITUDE LONGITUDE: LAT: N353500; N370000; LONG: W1161500; W1173000. AUTHOR AFFILIATION: University of Helsinki, Department of Geology, Helsinki, Finland ACCESSION NUMBER: 2002-069790 AUTHORS: Ramo-O-Tapani; Calzia-James-P; Kosunen-Paula-J BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: International DESCRIPTORS: California-; chemical-composition; Death-Valley; emplacement-; granites-; igneous-rocks; intrusions-; Inyo-County-California; magmatism-; Mesozoic-; North-America; North-American-Cordillera; petrography-; plutonic-rocks; plutons-; Southern-California; United-States DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 57; illus. incl. 4 tables, geol. sketch map. ISSN: 0010-7999 LANGUAGE: English PUBLISHER: Springer International. Heidelberg-New York, International. 2002. PUBLICATION YEAR: 2002 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Contributions to Mineralogy and Petrology. 143; 4, Pages 416-437. 2002. TITLE: Geochemistry of Mesozoic plutons, southern Death Valley region, California; insights into the origin of Cordilleran interior magmatism. UPDATE CODE: 200222 ---------------------------------------------------------------------------------------------------------- (Reference 257) GEOREF: 2000-055759 CODEN: XGROAG ACCESSION NUMBER: 2000-055759 AVAILABILITY: U. S. Geol. Surv., Denver, CO, United States BOOK AUTHORS: Wooden-J-L; Kistler-R-W; Tosdal-R-M BOOK AUTHOR AFFILIATION: U. S. Geological Survey, Menlo Park, CA, United States; University of British Columbia, Canada BOOK TITLE: Strontium, lead, and oxygen isotopic data for granitoid and volcanic rocks from the northern Great Basin and Sierra Nevada, California, Nevada, and Utah.

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BIB LEVEL: Monograph CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: alkaline-earth-metals; Basin-and-Range-Province; California-; Cenozoic-; geochemistry-; granites-; Great-Basin; igneous-rocks; isotope-ratios; isotopes-; lead-; lithogeochemistry-; Mesozoic-; metals-; Nevada-; North-America; O-18-O-16; oxygen-; Pb-206-Pb-204; Pb-207-Pb-204; Pb-208-Pb-204; plutonic-rocks; radioactive-isotopes; Sierra-Nevada; spatial-variations; Sr-87-Sr-86; stable-isotopes; strontium-; Tertiary-; United-States; USGS-; Utah-; volcanic-rocks DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs: 21; 2 tables, sketch map. ISSN: 0196-1497 LANGUAGE: English PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 20. 1999. PUBLICATION YEAR: 1999 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: OF 99-0569 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: Open-File Report - U. S. Geological Survey. 1999. UPDATE CODE: 200018 URL: (Availability) http://ngmsvr.wr.usgs.gov/Prodesc/proddesc_43623.htm ---------------------------------------------------------------------------------------------------------- (Reference 258) GEOREF: 1982-025098 CODEN: CMPEAP AUTHOR AFFILIATION: U. S. Geol. Surv., Denver, CO, United States ACCESSION NUMBER: 1982-025098 AUTHORS: Simmons-E-C; Hedge-C-E BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry COUNTRY OF PUBLICATION: International DESCRIPTORS: alkaline-earth-metals; Cenozoic-; Colorado-; geochemistry-; intrusions-; isotopes-; metals-; petrology-; Sr-87-Sr-86; stable-isotopes; stocks-; strontium-; Tertiary-; United-States DOCUMENT TYPE: Serial ILLUSTRATION: Refs 27; illus. incl. 5 tables, sketch maps. ISSN: 0010-7999 LANGUAGE: English PUBLISHER: Springer International. Heidelberg-New York, International. 1978. PUBLICATION YEAR: 1978 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP Non-USGS publications with USGS authors SOURCE: Contributions to Mineralogy and Petrology. 67; 4, Pages 379-396. 1978. . TITLE: Minor-element and Sr-isotope geochemistry of Tertiary stocks, Colorado mineral belt. UPDATE CODE: 1982 ----------------------------------------------------------------------------------------------------------

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(Reference 259) GEOREF: 1988-039016 CODEN: NWGYAR COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 6; illus. incl. 2 tables, sketch maps PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. Mont., Dep. Geol., Missoula, MT, United States USA ACCESSION NUMBER: 1988-039016 AUTHORS: Hirsch, Toni L; Hyndman, Donald W COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: chemical composition; evolution; Highwood Mountains; igneous rocks; intrusions; laccoliths; mineral composition; Montana; petrology; plutonic rocks; shonkinite; Square Butte Laccolith; syenites; United States ISSN: 0096-7769 LANGUAGE: English PUBLICATION YEAR: 1985 SOURCE: Northwest Geology, vol.14, pp.17-31, 1985 TITLE: Evolution of Square Butte Laccolith, eastern Highwood Mountains, Montana UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 260) GEOREF: 1988-036633 CODEN: XDIGAS COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 29; illus. incl. 3 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N360000,N374500 Longitude:W1180000,W1190000 MONOGRAPH TITLE: Potassium-argon ages for plutons in the eastern and southern Sierra Nevada Batholith, California PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: The ages of biotite and/or hornblende separates from 26 plutons in the eastern and southern Sierra Nevada Batholith were determined by the K-Ar method. Many biotite ages are too young and indicate argon loss by reheating. Most of the dated plutons were emplaced in Late Cretaceous time at the culmination of magmatic activity in the Sierra Nevada. AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States ACCESSION NUMBER: 1988-036633 AUTHORS: du Bray, Edward A; Dellinger, David A COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; amphibole group; batholiths; biotite; California; chain silicates; clinoamphibole; Cretaceous; dates; emplacement; geochronology; hornblende; igneous activity; intrusions; K/Ar; Mesozoic; mica group; plutons; sheet silicates; Sierra Nevada Batholith; silicates; United States; USGS ISSN: 8755-531X LANGUAGE: English PUBLICATION YEAR: 1988

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RESEARCH PROGRAM: B 1799 SOURCE: U. S. Geological Survey Bulletin, Report: B 1799, 10 pp., 1988 UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 261) GEOREF: 1997-034536 PUBLICATION TYPE: Serial; analytical ACCESSION NUMBER: 1997-034536 AUTHORS: Janecke, S.U.; Hammond, B.F.; Snee, L.W.; Geissman, J.W. COUNTRY OF PUBLICATION: United States LANGUAGE: English PUBLICATION YEAR: 1997 SOURCE: Geological Society of America Bulletin, vol. 109, no. 3, pp. 253-267 TITLE: Rapid extension in an Eocene volcanic arc; structure and paleogeography of an intra-arc half graben in central Idaho UPDATE CODE: 1997 ---------------------------------------------------------------------------------------------------------- (Reference 262) GEOREF: 2003-046395 COPYRIGHT: GeoRef, Copyright 2003, American Geological Institute PUBLICATION TYPE: Serial; analytical ACCESSION NUMBER: 2003-046395 AUTHORS: Feeley, T.C.; Cosca, M.A. COUNTRY OF PUBLICATION: United States LANGUAGE: English SOURCE: Geological Society of America Bulletin, vol. 115, no. 6, pp. 714-728, June 2003 TITLE: Time vs. composition trends of magmatism at Sunlight Volcano, Absaroka volcanic province, Wyoming UPDATE CODE: 2003 ---------------------------------------------------------------------------------------------------------- (Reference 263) GEOREF: 1998-900009 (unpublished Georef; Navdat only) MONOGRAPH TITLE: The Petrogenesis of the Eocene Challis Volcanic Group, Idaho, USA ORGANIZATION: The Open University PAGES DATE: 371 pp. PUBLICATION TYPE: Thesis or dissertation; doctoral; monographic ACCESSION NUMBER: 1998-900009 AUTHORS: McKervey, A. COUNTRY OF PUBLICATION: United Kingdom (UK) LANGUAGE: English

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PUBLICATION YEAR: 1998 ---------------------------------------------------------------------------------------------------------- (Reference 264) GEOREF: 2004-900008 (unpublished Georef; Navdat only) MONOGRAPH TITLE: The geochemistry, stable isotope composition, and U-Pb geochronology of tonalite trondhjemites within the accreted terrane, near Greer, north-central Idaho ORGANIZATION: Washington State University PAGES DATE: 132 pp. PUBLICATION TYPE: Thesis or dissertation; Masters ACCESSION NUMBER: 2004-900008 AUTHORS: Lee, Robert G. COUNTRY OF PUBLICATION: United States LANGUAGE: English PUBLICATION YEAR: 2004 ---------------------------------------------------------------------------------------------------------- (Reference 265) GEOREF: 2002-026012 CODEN: BUGMAF ABSTRACT: Davidson, Guide, Pioneer, Gumdrop, and Rodriguez Seamounts, located at the continental margin offshore California between latitudes 37.5 degrees N and 34.0 degrees N, may represent a previously unrecognized type of intraplate oceanic volcanism. Morphologically unlike typical oceanic-island volcanoes or near-ridge seamounts, they are complex, northeast-trending ridges that reflect the ridge-parallel structure of the underlying oceanic crust. (super 40) Ar/ (super 39) Ar laser fusion ages of mineral separates indicate at least two episodes of volcanism at ca. 16 and ca. 12 Ma, younger by 7-11 m.y. than the underlying ocean crust. Volcanic rocks are predominantly differentiated alkalic basalt, hawaiite, and mugearite. The lack of coherent liquid-lines-of-descent is consistent with small batches of magma forming, fractionally crystallizing, and erupting in isolation from the previous and subsequent batches. The presence of mantle xenoliths suggests that magmas originated in the upper mantle. Xenoliths of alkalic cumulates and xenocrysts of feldspar, amphibole, and titanomagnetite are consistent with fractionation in the upper mantle as well. Sr, Nd, and Pb isotope ratios of some samples are from depleted-mantle sources like those of MORB (mid-oceanic-ridge basalt); others indicate more variably enriched mantle sources. Magmas formed by small-percentage partial melting of variably enriched MORB-source-type mantle, according to the samples' high abundances of incompatible elements such as Nb, Ta, and Th. Coeval middle Miocene basalts in onshore coastal California have a similar isotopic range, but their trace elements show a subduction-related signature. If the coeval volcanic rocks offshore originated in a slab window, as proposed for those onshore, they were not influenced by a slab component. Although a slab-window origin is plausible for the middle Miocene volcanism, later episodes of small, sporadic eruptions on- and offshore probably resulted from decompression melting of mantle rising along existing zones of weakness undergoing extension related to continued movement along transform-fault systems.

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AUTHOR AFFILIATION: Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States ACCESSION NUMBER: 2002-026012 AUTHORS: Davis-Alice-S; Clague-David-A; Bohrson-Wendy-A; Dalrymple-G-Brent; Greene-H-Gary BIB LEVEL: Analytic CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkali-basalts; alkaline-earth-metals; Ar-Ar; basalts-; California-; Cenozoic-; continental-margin; crust-; dates-; Davidson-Seamount; East-Pacific; electron-probe-data; fractional-crystallization; geochemistry-; glasses-; Guide-Seamount; Gumdrop-Seamount; hawaiite-; igneous-rocks; inclusions-; intraplate-processes; isotope-ratios; isotopes-; lava-; lead-; lithogeochemistry-; magmas-; major-elements; mantle-; metals-; Miocene-; morphology-; mugearite-; Nd-144-Nd-143; neodymium-; Neogene-; North-Pacific; Northeast-Pacific; ocean-floors; oceanic-crust; Pacific-Ocean; Pb-206-Pb-204; Pb-207-Pb-204; Pb-208-Pb-204; Pioneer-Seamount; radioactive-isotopes; rare-earths; Rodriquez-Seamount; seamounts-; Sr-87-Sr-86; stable-isotopes; strontium-; submarine-volcanoes; Tertiary-; trace-elements; United-States; upper-mantle; volcanic-glass; volcanic-rocks; volcanism-; volcanoes-; xenoliths- DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 54; illus. incl. 6 tables, sketch maps. ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 2002. PUBLICATION YEAR: 2002 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States SOURCE: Geological Society of America Bulletin. 114; 3, Pages 316-333. 2002. TITLE: Seamounts at the continental margin of California; a different kind of oceanic intraplate volcanism. UPDATE CODE: 200210 URL: (Full text) http://www.gsajournals.org/gsaonline/?request=get-abstract&issn=0016-7606&volume=0114&issue=03&page=0316 ---------------------------------------------------------------------------------------------------------- (Reference 266) GEOREF: 2005-900010 (unpublished Georef; Navdat only) ACCESSION NUMBER: 2005-900010 AUTHORS: Patchett-J-P; Gehrels-G; Ducea-M; Wetmore-P TITLE: Preliminary OCT 05 BATHOLITHS Dataset ---------------------------------------------------------------------------------------------------------- (Reference 267) GEOREF: 2005-900020 (unpublished Georef; Navdat only) ACCESSION NUMBER: 2005-900020

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AUTHORS: Patchett-J-P; Gehrels-G; Ducea-M; Wetmore-P TITLE: Preliminary OCT 05 BATHOLITHS Dataset, Part 2 ---------------------------------------------------------------------------------------------------------- (Reference 268) GEOREF: 1990-049413 CODEN: XDIGAS COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology; 16 Structural geology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 47; 1 table, sketch maps LATITUDE LONGITUDE: LAT: N344500; N360000; LONG: W1175000; W1193000. PUBLICATION TYPE: Serial; Report; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: The strontium isotopic study of the southern Sierra Nevada has identified Middle Jurassic plutons in the east and Cretaceous plutons in the west separated by a narrow northwest trending belt of Triassic plutons. Isotopic and chemical differences of the plutons are used to identify two distinct lithosphere types in the area. AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States ACCESSION NUMBER: 1990-049413 AUTHORS: Kistler, Ronald W; Ross, D C BOOK AUTHORS: Kistler-Ronald-W; Ross-D-C BOOK AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States BOOK TITLE: A strontium isotopic study of plutons and associated rocks of the southern Sierra Nevada and vicinity, California. BIB LEVEL: Monograph CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology; 16-Structural-geology COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology; 16 Structural geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: alkali-metals; alkaline-earth-metals; California-; classification-; crust-; faults-; geochemistry-; gneisses-; granites-; granodiorites-; igneous-rocks; intrusions-; isotopes-; Kern-County-California; lithophile-elements; lithosphere-; magmas-; Mesozoic-; metaigneous-rocks; metals-; metamorphic-rocks; North-American-Lithosphere; O-18-O-16; oxygen-; Panthalassan-Lithosphere; plutonic-rocks; plutons-; rubidium-; sedimentary-rocks; shear-zones; Sierra-Nevada; Southern-California; Sr-87-Sr-86; stable-isotopes; strontium-; tectonics-; terranes-; trace-elements; Tulare-County-California; United-States; USGS- DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs: 47; 1 table, sketch maps. ISSN: 8755-531X LANGUAGE: English PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 20. 1990. PUBLICATION YEAR: 1990 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: B 1920 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: U. S. Geological Survey Bulletin. 1990. TITLE: A strontium isotopic study of plutons and associated rocks of the southern Sierra Nevada and vicinity, California

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UPDATE CODE: 1990 URL: (Availability) http://ngmsvr.wr.usgs.gov/Prodesc/proddesc_22141.htm ---------------------------------------------------------------------------------------------------------- (Reference 269) GEOREF: 1997-072240 CODEN: BUGMAF COLLECTION AUTHORS: 16 Structural geology; 05A Igneous and metamorphic petrology; 03 Geochronology COPYRIGHT: GeoRef, Copyright 2006, American Geological Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States FEATURES: References: 41; illus. incl. strat. cols., 2 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N280000,N284500 Longitude:W1090000,W1110000 PUBLICATION TYPE: Serial; Analytic RESOURCE LOCATION: [URL:http://www.gsajournals.org/] ABSTRACT: Clastic sedimentary deposits and associated volcanic rocks record the progress of Tertiary extension in the Mexican state of Sonora. These deposits accumulated within basins located throughout the eastern two-thirds of the state. The rocks are slightly indurated conglomerates and sandstones; clast types reflect the local highland exposures. Volcanic units that bound and are interlayered with the sedimentary rocks provide stratigraphic and time markers of basin evolution and, by inference, of marginal fault development. This record has been examined in an east-west belt across south-central Sonora. The volcanic rocks occur in three distinct associations. At the base and interbedded within the lower portions of the sedimentary sections are lava flows of dominantly basaltic andesite composition. In most localities the overlying clastic sedimentary strata are conformable with these lava flows, and we conclude that the magmatism was triggered by early faulting along the basin margins. A second association present near the base of the sections comprises massive lava domes and flows of intermediate composition that contain distinctive phenocrysts of dark brown amphibole. The domes apparently formed when viscous lava welled up along developing marginal basin faults. In one case a transition was observed over a short distance from a structureless dome to a thick lava flow that is conformably interbedded with, and sheds clasts laterally into, the sedimentary section. A third volcanic association comprises layers of rhyolitic lava flows and ignimbrites that overlie the coarsest and thickest lower portions of the sedimentary sections. K-Ar ages for volcanic rocks in the two oldest of these settings indicate that each Tertiary basin had a distinct history with no apparent regional geographic pattern. In the Rio Yaqui basin, where exhumation by the major river of Sonora has exposed a full section of the volcanic and clastic sequences, extension was possibly as old as 27 Ma. Elsewhere, deposition of sediments was underway in most basins by 24 Ma, and in all basins by 20 Ma. K-Ar ages of the younger rhyolitic volcanic rocks fall within a narrow range from 12.8 to 10.5 Ma. These ages provide a younger time limit to deposition of the coarser and thicker portions of the clastic sedimentary sections. The mafic lava flows, dominantly basaltic andesite, are similar in major-element composition to mafic lava flows that cap felsic sections within the Sierra Madre Occidental volcanic field of western Mexico and the mid-Tertiary Datil-Mogollon volcanic field in southwestern New Mexico. They are higher in silica and lower in total alkalies than younger capping mafic lava flows within the Gulf of California extensional province of western Sonora and Neogene basaltic lava flows in the Datil-Mogollon field. They are similarly distinct from basaltic

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dikes and lava flows that are clearly associated with Basin and Range faulting in Trans-Pecos Texas and in northern Durango state. A convergent-margin magmatic arc was active in the present-day Gulf of California region between 24 and 11.5 Ma. The earliest extension in south-central Sonora was therefore occurring in a back-arc setting. Continued sedimentation and rotation of volcanic strata indicate that extension continued throughout the region after 10 Ma with little coeval volcanism. AUTHOR AFFILIATION: Universidad Nacional Autonoma de Mexico, Hermosillo, Mexico (MEX); Universidad de Sonora, Hermosillo, Mexico (MEX) ACCESSION NUMBER: 1997-072240 AUTHORS: McDowell, Fred W; Roldan Quintana, Jaime; Amaya Martinez, Ricardo COLLECTION AUTHORS: 16 Structural geology; 05A Igneous and metamorphic petrology; 03 Geochronology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: absolute age; basins; Cenozoic; clastic rocks; conglomerate; dates; extension faults; extension tectonics; faults; geochemistry; grabens; half grabens; igneous rocks; K/Ar; lava; major elements; Mexico; Neogene; plate convergence; sandstone; sedimentary basins; sedimentary rocks; Sonora Mexico; structural controls; systems; tectonics; Tertiary; volcanic rocks ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1997 SOURCE: Geological Society of America Bulletin, vol.109, no.10, pp.1349-1360, Oct 1997 TITLE: Interrelationship of sedimentary and volcanic deposits associated with Tertiary extension in Sonora, Mexico UPDATE CODE: 199724 ---------------------------------------------------------------------------------------------------------- (Reference 270) GEOREF: 1995-018609 CODEN: BUGMAF LATITUDE LONGITUDE: LAT: N490000; N510000; LONG: W1223000; W1233000. AUTHOR AFFILIATION: University of British Columbia, Department of Geological Sciences, Vancouver, BC, Canada ACCESSION NUMBER: 1995-018609 AUTHORS: Cui-Yao; Russell-J-K BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 03-Geochronology; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkaline-earth-metals; British-Columbia; Canada-; Coast -plutonic-complex; Cretaceous-; dates-; igneous-rocks; isotope-ratios; isotopes-; Jurassic-; lead-; magmas-; mantle-; Mesozoic-; metals-; Nd-144-Nd-143; neodymium-; North-America; partial-melting; Pb-206-Pb-204; Pb-207-Pb-204; Pb -208-Pb-204; Pb-Pb; plutonic-rocks; radioactive-isotopes; rare-earths;southwestern-British-Columbia; Sr-87-Sr-86; stable-isotopes; strontium-; Upper-Jurassic; volcanic-rocks; Western-Canada DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 72; illus. incl. 6 tables, geol. sketch maps. ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States.

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1995. PUBLICATION YEAR: 1995 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States SOURCE: Geological Society of America Bulletin. 107; 2, Pages 127-138. 1995. TITLE: Nd-Sr-Pb isotopic studies of the southern Coast plutonic complex,southwestern British Columbia. UPDATE CODE: 199507 ---------------------------------------------------------------------------------------------------------- (Reference 271) GEOREF: 1983-005202 CODEN: ECGLAL LATITUDE LONGITUDE: LAT: N394700; N394800; LONG: W1052930; W1053100. AUTHOR AFFILIATION: Marischal Coll., Dep. Geol., Aberdeen, United Kingdom ACCESSION NUMBER: 1983-005202 AUTHORS: Rice-C-M; Lux-D-R; Macintyre-R-M BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; age-; base-metals; Cenozoic-; Central-City-District; Colorado-; dates-; dikes-; economic-geology; Front-Range; Gilpin-County-Colorado; hydrothermal-alteration; hydrothermal-processes; igneous-processes; intrusions-; intrusive-rocks; K-Ar; Laramide-Orogeny; metal-ores; metals-; metasomatism-; mica-group; mineral-deposits,-genesis; North-America; orogeny-; Paleocene-; Paleogene-; precious-metals; pyrite-ores; Rocky-Mountains; sericite-; sheet-silicates; silicates-; stocks-; tellurides-; Tertiary-; United-States; uranium-ores DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 47; illus. incl. 21 anal., 2 tables, geol. sketch maps. ISSN: 0361-0128 LANGUAGE: English PUBLISHER: Economic Geology Publishing Company. Lancaster, PA, United States. 1982. PUBLICATION YEAR: 1982 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists. 77; 7, Pages 1655-1666. 1982. . TITLE: Timing of mineralization and related intrusive activity near Central City, Colorado. UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 272) GEOREF: 1986-080191 CODEN: ECGLAL COLLECTION AUTHORS: 27A Economic geology, geology of ore deposits; 02D Isotope geochemistry

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COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 21; illus. incl. 2 tables, geol. sketch maps LATITUDE LONGITUDE: Latitude: N394300,N395000 Longitude: W1053000,W1053300 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. Aberdeen, United Kingdom (GBR); South. Method. Univ., United States (USA) ACCESSION NUMBER: 1986-080191 AUTHORS: Dickin, A P; Rice, C M; Harmon, R S COLLECTION AUTHORS: 27A Economic geology, geology of ore deposits; 02D Isotope geochemistry COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: alkaline earth metals; Central City District; Clear Creek County Colorado; Colorado; economic geology; Front Range; gangue; geochemical controls; Gilpin County Colorado; hydrothermal alteration; hydrothermal processes; Idaho Springs District; igneous processes; intrusions; isotopes; Laramide Orogeny; metal ores; metals; metasomatism; mineral deposits, genesis; molybdenum ores; north-central Colorado; O-18/O-16; ore minerals; ore-forming fluids; oxygen; porphyry molybdenum; Sr-87/Sr-86; stable isotopes; strontium; United States ISSN: 0361-0128 LANGUAGE: English SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists, vol.81, no.4, pp.904-914, Jul 1986 TITLE: A strontium and oxygen isotope study of Laramide magmatic and hydrothermal activity near Central City, Colorado UPDATE CODE: 1986 ---------------------------------------------------------------------------------------------------------- (Reference 273) GEOREF: 1988-018708 CODEN: CMPEAP AUTHOR AFFILIATION: U. S. Geol. Surv., Menlo Park, CA 94025, United States ACCESSION NUMBER: 1988-018708 AUTHORS: Kistler-R-W; Chappell-B-W; Peck-D-L; Bateman-P-C BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: International DESCRIPTORS: alkaline-earth-metals; California-; Cretaceous-; genesis-; granites-; granitic-composition; igneous-rocks; isotopes-; Mesozoic-; metals-; Nd-144-Nd-143; neodymium-; O-18-O-16; oxygen-; petrology-; plutonic-rocks; rare-earths; Sierra-Nevada; Sr-87-Sr-86; stable-isotopes; strontium-; Tuolumne-intrusive-suite; United-States; Upper-Cretaceous DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 52; illus. incl. 5 tables, geol. sketch maps. ISSN: 0010-7999 LANGUAGE: English PUBLISHER: Springer International. Heidelberg-New York, International. 1986. PUBLICATION YEAR: 1986 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe, Hanover, Germany RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Contributions to Mineralogy and Petrology. 94; 2, Pages 205-220. 1986. TITLE: Isotopic variation in the Tuolumne intrusive suite, central Sierra

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Nevada, California. UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 274) GEOREF: 1999-007762 CODEN: CJESAP LATITUDE LONGITUDE: LAT: N541200; N542900; LONG: W1284600; W1302200. LAT: N600400; N600500; LONG: W1302700; W1302700. LAT: N621000; N621800; LONG: W1331600; W1340000. SUMMARY LANGUAGE: French AUTHOR AFFILIATION: University of Arizona, Department of Geosciences, Tucson, AZ, United States AUTHORS: Patchett-P-J; Gehrels-G-E; Isachsen-C-E BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: Canada DESCRIPTORS: absolute-age; batholiths-; British-Columbia; Canada-; Coast-Mountains; dates -; geochemistry-; igneous-rocks; intrusions-; isotope-ratios; isotopes-;lithogeochemistry-; Mesozoic-; metaigneous-rocks; metals-; metamorphic-rocks metasedimentary-rocks; Nd-144-Nd-143; neodymium-; North-America; Omineca-Belt;plutonic-rocks; plutons-; Prince-Rupert-British-Columbia; rare-earths; Sm-Nd;stable-isotopes; Western-Canada; Yukon-Territory DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 33; illus. incl. 2 tables, geol. sketch map. ISSN: 0008-4077 LANGUAGE: English PUBLISHER: National Research Council of Canada. Ottawa, ON, Canada. 1998. PUBLICATION YEAR: 1998 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre. 35; 5, Pages 556-561. 1998. TITLE: Nd isotopic characteristics of metamorphic and plutonic rocks of the Coast Mountains near Prince Rupert, British Columbia. UPDATE CODE: 199904 ---------------------------------------------------------------------------------------------------------- (Reference 275) GEOREF: 1990-053226 CODEN: GSAMAQ COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Anderson, J. Lawford FEATURES: References: 53; illus. incl. 1 table, geol. sketch map MONOGRAPH TITLE: The nature & origin of Cordilleran magmatism PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. South. Calif., Dep. Geol. Sci., Los Angeles, CA, United States(USA) ACCESSION NUMBER: 1990-053226

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AUTHORS: Foster, David A; Hyndman, Donald W COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: andesites; batholiths; Bitterroot Range; chemical composition;Cretaceous; crystallization; dacites; dikes; diorites; evolution;foliation; granites; Idaho; Idaho Batholith; igneous rocks;inclusions; intrusions; lineation; mafic composition; magmas;Mesozoic; metals; mineral composition; mixing; Montana; petrology;phenocrysts; plutonic rocks; quartz diorites; rare earths; RockyMountains; textures; U. S. Rocky Mountains; United States; UpperCretaceous; volcanic rocks ISBN: 813711746 ISSN: 0072-1069 LANGUAGE: English PUBLICATION YEAR: 1990 SOURCE: Memoir - Geological Society of America, vol.174, pp.347-358, 1990 TITLE: Magma mixing and mingling between synplutonic mafic dikes and granitein the Idaho-Bitterroot Batholith UPDATE CODE: 1990 ---------------------------------------------------------------------------------------------------------- (Reference 276) GEOREF: 1980-016077 ACCESSION NUMBER: 1980-016077 BOOK AUTHORS: Storch-Sara-Glen-Power BOOK TITLE: Geology of the Blue River mining district, Linn and Lane counties, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 13-Areal-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: andesites-; areal-geology; basalts-; Blue-River-District; breccia-; Cenozoic-; clastic-rocks; dacites-; glaciers-; hydrothermal-alteration; igneous-rocks; intrusions-; Lane-County-Oregon; Linn-County-Oregon; metallogeny-; metasomatism-; Miocene-; Neogene-; Oregon-; paleomagnetism-; petrology-; plutons-; pyrite-; pyroclastics-; Sardine-Formation; sedimentary-rocks; shear-zones; sulfides-; Tertiary-; trace-elements; tuff-; United-States; veins-; volcanic-rocks; Western-Cascades DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: Oregon State University. Corvallis, OR, United States. Pages: 70. 1978. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1978 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1980 ---------------------------------------------------------------------------------------------------------- (Reference 277) GEOREF: 1990-067305

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---------------------------------------------------------------------------------------------------------- (Reference 278) GEOREF: 1991-038715 COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous andmetamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 45; illus. incl. 5 tables, sketch map LATITUDE LONGITUDE: Latitude:N440000,N450000 Longitude:W1140000,W1160000 PUBLICATION TYPE: Serial; Conference document; Analytic AUTHOR AFFILIATION: Franklin and Marshall Coll., United States USA ACCESSION NUMBER: 1991-038715 AUTHORS: Norman, Marc D; Mertzman, Stanley A COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous andmetamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: ash-flow tuff; Boise County Idaho; calderas; Cenozoic; central Idaho;Challis Quadrangle; Challis Volcanics; continental crust; Custer County Idaho; dikes; Eocene; geochemistry; Idaho;igneous rocks; intrusions; isotopes; lava; lead; Lemhi County Idaho;magmas; major elements; melting; metals; Paleogene; pyroclastics; Tertiary; trace elements; United States; Valley County Idaho;volcanic features; volcanic rocks ISSN: 0885-3401 LANGUAGE: English PUBLICATION YEAR: 1991 SOURCE: Journal of Geophysical Research, B, Solid Earth and Planets, vol.96,no.8, pp.13,279-13,293, 30 Jul 1991 TITLE: Petrogenesis of Challis Volcanics from central and southwestern Idaho;trace element and Pb isotopic evidence UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 279) GEOREF: 1981-027887 LATITUDE LONGITUDE: LAT: N420000; N430000; LONG: W1210000; W1230000. MAP TYPE: geologic-maps ACCESSION NUMBER: 1981-027887 BOOK AUTHORS: Naslund-Howard-Richard BOOK TITLE: The geology of the Hyatt Reservoir and Surveyor Mountain quadrangles, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 13-Areal-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: areal-geology; Columbia-Plateau; geologic-maps; Hyatt-Reservoir-Quadrangle; Jackson-County-Oregon; Klamath-County-Oregon; maps-; Oregon-; Surveyor-Mountain-Quadrangle; United-States DEGREE GRANTED: Master's DEGREE GRANTING INSTITUTION: University of Oregon. Eugene, OR, United States. DOCUMENT TYPE: Thesis-or-Dissertation; Map ILLUSTRATION: illus. incl. tables.

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LANGUAGE: English MAP TYPE: geologic-maps MAP SCALE: 1:62,500 PUBLISHER: Pages: 127. 1977. PUBLICATION YEAR: 1977 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1981 ---------------------------------------------------------------------------------------------------------- (Reference 280) GEOREF: 1983-051191 CODEN: XGROAG ACCESSION NUMBER: 1983-051191 AVAILABILITY: U. S. Geol. Surv., Open-File Serv. Sect., West. Distrib. Branch, Denver Fed. Cent., Lakewood, CO, United States BOOK AUTHORS: Ort-K-M; Tabor-R-W; Frizzell-V-A Jr. BOOK AUTHOR AFFILIATION: U. S. Geol. Surv., USA, United States BOOK TITLE: Chemical analyses of selected Tertiary and Quaternary volcanic rocks, Cascade Range, Washington. BIB LEVEL: Monograph CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 02C-Geochemistry-of-rocks,-soils,-and-sediments COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Cascade-Range; Cenozoic-; data-; geochemistry-; igneous-rocks; petrology-; United-States; USGS-; volcanic-rocks; Washington- DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs: 25; 2 tables. ISSN: 0196-1497 LANGUAGE: English PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 15. 1983. PUBLICATION YEAR: 1983 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: OF 83-0001 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: Open-File Report - U. S. Geological Survey. 1983. UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 281) GEOREF: 1982-031265 LATITUDE LONGITUDE: LAT: N440000; N450000; LONG: W1221000; W1230000. ACCESSION NUMBER: 1982-031265 AVAILABILITY: University Microfilms, Ann Arbor, MI, United States BOOK AUTHORS: Lux-Daniel-R BOOK TITLE: Geochronology, geochemistry, and petrogenesis of basaltic rocks from the western Cascades, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments COUNTRY OF PUBLICATION: United-States

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DESCRIPTORS: alkaline-earth-metals; basalts-; calc-alkalic-composition; Cascade-Range; Cenozoic-; Columbia-River-Basalt-Group; genesis-; geochemistry-; geochronology-; igneous-rocks; isotopes-; Linn-County-Oregon; Little-Butte-Volcanic-Series; magmas-; major-elements; metals-; Miocene-; Neogene-; Oligocene-; Oregon-; Paleogene-; rare-earths; ratios-; Sr-87-Sr-86; stable-isotopes; strontium-; Tertiary-; tholeiitic-composition; trace-elements; United-States; volcanic-rocks DEGREE GRANTED: Doctoral DEGREE GRANTING INSTITUTION: Ohio State University. Columbus, OH, United States. Pages: 182. 1981. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1981 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1982 ---------------------------------------------------------------------------------------------------------- (Reference 282) GEOREF: 2003-016575 COLLECTION AUTHORS: 26A, Economic geology, general, deposits COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Genetic relationship between porphyry and epithermal deposits at Jamestown, Colorado ORGANIZATION: University of Colorado, Boulder, CO, United States (USA) PAGES DATE: 282 pp. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic ACCESSION NUMBER: 2003-016575 AUTHORS: Sharaky, Abbas Mohamed AVAILABILITY: University Microfilms, Ann Arbor, MI, United States (USA) COLLECTION AUTHORS: 26A, Economic geology, general, deposits COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: absolute age; airborne methods; Ar/Ar; AVIRIS; Boulder County Colorado; Colorado; epithermal processes; fluorspar; geophysical methods; gold ores; infrared methods; intrusions; Jamestown mining district; lead ores; low temperature; metal ores; metals; mineral deposits, genesis; mineral exploration; mineralization; ore minerals; ore-forming fluids; paleosalinity; paleotemperature; petrography; porphyry molybdenum; Porphyry Mountain; rare earths; remote sensing; silver ores; spectroscopy; stocks; temperature; United States; zoning ISBN: 599854707 LANGUAGE: English PUBLICATION YEAR: 2000 UPDATE CODE: 200306 ---------------------------------------------------------------------------------------------------------- (Reference 283) GEOREF: 2006-900111 (unpublished Georef; Navdat only) MONOGRAPH TITLE: Major oxide and trace element analyses for igneous and metamorphic rock samples from northern and central Idaho

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SPONSOR: Idaho Geological Survey ACCESSION NUMBER: 2006-900111 AUTHORS: Lewis, R; Frost, T. COUNTRY OF PUBLICATION: United States USA LANGUAGE: English PUBLICATION YEAR: 2006 SOURCE: Idaho Geological Survey Digital Analytical Data 2; part 1 ---------------------------------------------------------------------------------------------------------- (Reference 284) GEOREF: 1992-900019 (unpublished Georef; Navdat only) MONOGRAPH TITLE: The association of alkalic and subalkalic rocks in the Bearpaw Mountains, Montana ORGANIZATION: University of Montana, Missoula PAGES DATE: 160 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1992-900019 AUTHORS: Tureck-Schwartz, Kathy COUNTRY OF PUBLICATION: United States USA LANGUAGE: English PUBLICATION YEAR: 1992 UPDATE CODE: 1992 ---------------------------------------------------------------------------------------------------------- (Reference 285) GEOREF: 1987-026793 ACCESSION NUMBER: 1987-026793 AVAILABILITY: University Microfilms, Ann Arbor, MI, United States BOOK AUTHORS: Holder-Robert-Wade BOOK TITLE: Emplacement and geochemical evolution of Eocene plutonic rocks in the Colville Batholith. BIB LEVEL: Monograph CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 12-Stratigraphy COUNTRY OF PUBLICATION: United-States DESCRIPTORS: batholiths-; Bridge-Creek-Intrusions; calc-alkalic-composition; Cenozoic-; chemical-composition; classification-; Colville-Batholith; Devils-Elbow-Suite; diorites-; emplacement-; Eocene-; evolution-; fractional-crystallization; grabens-; granites-; granodiorites-; Herron-Creek-Suite; igneous-rocks; intrusions-; Keller-Butte-Suite; monzodiorite-; new-names; northwestern-Washington; Paleogene-; petrology-; plutonic-rocks; stratigraphy-; Tertiary-; United-States; Washington- DEGREE GRANTED: Doctoral DEGREE GRANTING INSTITUTION: Washington State University. Pullman, WA, United States. Pages: 189. 1986. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1986 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1987

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---------------------------------------------------------------------------------------------------------- (Reference 286) GEOREF: 1991-038714 COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous andmetamorphic petrology COPYRIGHT: GeoRef, Copyright 2006, American Geological Institute. FEATURES: References: 150; illus. incl. 3 tables, geol. sketch map MONOGRAPH TITLE: Mid-Tertiary Cordilleran magmatism; plate convergence versusintraplate processes PUBLICATION TYPE: Serial; Conference document; Analytic AUTHOR AFFILIATION: Geol. Surv. Can., Ottawa, ON, Canada (CAN) ACCESSION NUMBER: 1991-038714 AUTHORS: Dudas, Francis O COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous andmetamorphic petrology CONFERENCE INFORMATION: 1989 general assembly of the International Association of Volcanologyand Chemistry of the Earth's Interior | Geological Society of America,Cordilleran Section, 86th annual meeting | Geological Society ofAmerica symposium on Eocene magmatism in the northwestern USA, SantaFe, NM, United States | Tucson, AZ, 1988 COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: alkalic composition; Cenozoic; Crazy Mountains; Eocene; geochemistry;igneous rocks; magmas; Meagher County Montana; Montana; Paleogene;Park County Montana; petrology; plate tectonics; south-centralMontana; subduction; Sweet Grass County Montana; Tertiary; UnitedStates; Wheatland County Montana ISSN: 0148-0227 LANGUAGE: English NOTES: Geol. Surv. Can., Contrib. No. 17089 PUBLICATION YEAR: 1991 SOURCE: Journal of Geophysical Research, vol.96, no.B8, pp.13,261-13,277, 30Jul 1991 TITLE: Geochemistry of igneous rocks from the Crazy Mountains, Montana, andtectonic models for the Montana alkalic province UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 287) GEOREF: 2007-028084 CODEN: GSAPAZ COLLECTION AUTHORS: 18, Solid-earth geophysics COPYRIGHT: GeoRef, Copyright 2007, American Geological Institute. BOOK EDITORS: Snoke, Arthur W; Barnes, Calvin G FEATURES: References: 70; illus. incl. sects., 5 tables, geol. sketch maps LATITUDE LONGITUDE: Latitude:N410000,N430000 Longitude:W1230000,W1243000 MONOGRAPH TITLE: Geological studies in the Klamath Mountains province, California andOregon; a volume in honor of William P. Irwin PUBLICATION TYPE: Serial; Analytic

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ABSTRACT: The western Jurassic belt of the Klamath Mountains represents one ofthe Earth's best-preserved exposures of ancient marginal ocean basinlithosphere and chiefly consists of the coeval Rogue-Chetcovolcanic-plutonic oceanic arc and Josephine ophiolite. This LateJurassic ocean basin is hypothesized to have formed in response torifting that initiated at ca. 165 Ma along the western margin of NorthAmerica, disrupting a Middle Jurassic arc that had been constructed onolder Klamath terranes and forming a marginal ocean basin with anactive arc, inter-arc basin, and remnant arc. Previous workerscharacterized a rift-edge facies in the remnant-arc region. Thischapter describes field, age, and geochemical data that suggest that asimilar rift-edge facies exists in the vicinity of the active arc, onthe opposite side of the marginal basin. The rift-edge facies in theactive arc setting consists of two main lithotectonic units, hereinnamed informally as the Onion Camp complex and Fiddler Mountainolistostrome. The Onion Camp complex is partly composed of acharacteristic metabasalt and red chert association. Red chert yieldedscarce radiolarians of Triassic(?) and Early Jurassic age. A distinctchert-pebble conglomerate occurs at scarce localities withinmetasedimentary rocks. Concordant, composite bodies of amphibolite andserpentinized peridotite represent another distinctive feature of theOnion Camp complex. The metamorphic and lithologic features of theOnion Camp complex are similar to the lower melange unit of theRattlesnake Creek terrane, and the units are interpreted to becorrelative. The Fiddler Mountain olistostrome is composed of LateJurassic (Kimmeridgian?) pelagic and hemipelagic rocks interlayeredwith ophioliteclast breccia and megabreccia, similar in character toolistostromal deposits associated with the rift-edge facies of theremnant arc. The occurrence of the Rattlesnake Creek terrane and anassociated olistostromal deposit within the western Jurassic belt ofsouthwestern Oregon may therefore represent the rift-edge facies inthe active arc setting, at the transition between the Rogue-Chetco arcand Josephine ophiolite, further corroborating previous models for theLate Jurassic tectonic evolution of the Klamath Mountains. AUTHOR AFFILIATION: University of Wyoming, Department of Geology and Geophysics, Laramie,WY, United States (USA) ACCESSION NUMBER: 2007-028084 AUTHORS: Yule, J Douglas; Saleeby, Jason B; Barnes, Calvin G COLLECTION AUTHORS: 18, Solid-earth geophysics COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: California; depositional environment; fabric; Fiddler Mountain;Invertebrata; Josephine Ophiolite; Jurassic; Klamath Mountains;lithofacies; lithosphere; major elements; Mesozoic; metals;microfossils; olistostromes; Onion Camp; Oregon; plate tectonics;Protista; provenance; Radiolaria; rare earths; Rattlesnake CreekTerrane; rifting; Rogue-Chetco Arc; sedimentary structures; softsediment deformation; trace elements; United States; Upper Jurassic ISBN: 0813724104; 978081372410 ISSN: 0072-1077 LANGUAGE: English PUBLICATION YEAR: 2006 SOURCE: Special Paper - Geological Society of America, vol.410, pp.53-76,2006 TITLE: A rift-edge facies of the Late Jurassic Rogue-Chetco Arc and JosephineOphiolite, Klamath Mountains, Oregon UPDATE CODE: 200708 ----------------------------------------------------------------------------------------------------------

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(Reference 288) GEOREF: 1996-017358 CODEN: GCACAK COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2006, American Geological Institute. FEATURES: References: 117; illus. incl. 4 tables, geol. sketch map PUBLICATION TYPE: Serial; Analytic RESOURCE LOCATION: http://www.sciencedirect.com/science/journal/00167037] AUTHOR AFFILIATION: Royal Holloway University of London, United Kingdom (GBR) ACCESSION NUMBER: 1996-017358 AUTHORS: O'Brien, Hugh E; Irving, Anthony J; McCallum, I S; Thirlwall, MatthewF COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: International (III) DESCRIPTORS: alkaline earth metals; Cenozoic; Eocene; Highwood Mountains; isotoperatios; isotopes; lead; mafic composition; magmas; metals; Montana;Nd-144/Nd-143; neodymium; Paleogene; Pb-206/Pb-204; potassiccomposition; radioactive isotopes; rare earths; samarium;Sm-147/Nd-144; Sr-87/Sr-86; stable isotopes; strontium; Tertiary;trace elements; United States; Wyoming Province ISSN: 0016-7037 LANGUAGE: English PUBLICATION YEAR: 1995 SOURCE: Geochimica et Cosmochimica Acta, vol.59, no.21, pp.4539-4556, Nov1995 TITLE: Strontium, neodymium, and lead isotope evidence for the interaction ofpost-subduction asthenospheric potassic mafic magmas of the HighwoodMountains, Montana, USA, with ancient Wyoming craton lithosphericmantle UPDATE CODE: 199607 ---------------------------------------------------------------------------------------------------------- (Reference 289) GEOREF: 2003-056156 CODEN: CMPEAP COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 18 Solid-earth geophysics COPYRIGHT: GeoRef, Copyright 2006, American Geological Institute. FEATURES: References: 63; illus. incl. 1 table, sketch map LATITUDE LONGITUDE: Latitude:N472400,N482000 Longitude:W1093000,W1112500 PUBLICATION TYPE: Serial; Analytic RESOURCE LOCATION: http://www.springerlink.com/(zmx2wiu4y01pcgigj5i3jxf5)/app/home/journal.asp?referrer=parent&backto=linkingpublicationresults,1:100406,1] AUTHOR AFFILIATION: Queen's University, Canada (CAN) ACCESSION NUMBER: 2003-056156 AUTHORS: Greenough, John D; Kyser, T Kurtis COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 18 Solid-earth geophysics COUNTRY OF PUBLICATION: International (III) DESCRIPTORS: absolute age; Archean; basalts; chemical composition; chemical ratios;Chouteau County Montana; continental lithosphere; dates; igneousrocks; intrusions; isotope ratios; isotopes; lithosphere; mantle;mineral composition; Montana; Nd/Nd; O-18/O-16; oxygen; Pb/Pb;petrography; Precambrian; Proterozoic; Shonkin Sag Laccolith; sills;Sm/Nd; stable isotopes; United States; upper

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Precambrian; volcanicrocks ISSN: 0010-7999 LANGUAGE: English PUBLICATION YEAR: 2003 SOURCE: Contributions to Mineralogy and Petrology, vol.145, no.2, pp.169-181,May 2003 TITLE: Contrasting Archean and Proterozoic lithospheric mantle; isotopicevidence from the Shonkin Sag sill (Montana) UPDATE CODE: 200318 ---------------------------------------------------------------------------------------------------------- (Reference 290) GEOREF: 1992-057712 CODEN: JPTGAD COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2006, American Geological Institute. FEATURES: References: 98; illus. incl. 8 tables, sketch map PUBLICATION TYPE: Serial; Analytic SPONSOR: USGSOP, Non-USGS publications with USGS authors AUTHOR AFFILIATION: Univ. Edinburgh, United Kingdom (GBR); Univ. Calif. at Santa Gruz,United States (USA); U. S. Geol. Surv., United States (USA) ACCESSION NUMBER: 1992-057712 AUTHORS: MacDonald, R; Upton, B G J; Collerson, K D; Hearn, B C, Jr; James, D COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United Kingdom (GBR) DESCRIPTORS: Bearpaw Mountains; Blaine County Montana; genesis; igneous rocks;lamprophyres; latite; mineral composition; minette; Montana;north-central Montana; petrology; plutonic rocks; potassiccomposition; trachyandesites; United States; volcanic rocks ISSN: 0022-3530 LANGUAGE: English PUBLICATION YEAR: 1992 SOURCE: Journal of Petrology, vol.33, no.2, pp.305-346, Apr 1992 TITLE: Potassic mafic lavas of the Bearpaw Mountains, Montana; mineralogy,chemistry, and origin UPDATE CODE: 1992 ---------------------------------------------------------------------------------------------------------- (Reference 291) GEOREF: 1997-040962 CODEN: BUGMAF LATITUDE LONGITUDE: LAT: N305500; N305500; LONG: W1153000; W1153000. AUTHOR AFFILIATION: Queen's University, Department of Geological Sciences, Kingston, ON, Canada ACCESSION NUMBER: 1997-040962 AUTHORS: Ortega-Rivera-Amabel; Farrar-E; Hanes-J-A; Archibald-D-A; Gastil-R-G; Kimbrough-D-L; Zentilli-M; Lopez-Martinez-M; Feraud-G; Ruffet-G BIB LEVEL: Analytic CATEGORY CODES: 03-Geochronology

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COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Ar-Ar; Baja-California; Cretaceous-; dates-; fission-tracks; fission-track-dating; geochronology-; geologic-barometry; intrusions-; K-Ar; Mesozoic-; Mexico-; models-; North-America; Peninsular-Ranges-Batholith; plutons-; Sierra-San-Pedro-Martir-Pluton; tectonics-; thermal-history; tilt-; U -Pb DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 55; illus. incl. 5 tables, sketch maps. ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 1997. PUBLICATION YEAR: 1997 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States SOURCE: Geological Society of America Bulletin. 109; 6, Pages 728-745. 1997. TITLE: Chronological constraints on the thermal and tilting history of the Sierra San Pedro Martir Pluton, Baja California, Mexico, from U/ Pb, (super 40) Ar/ (super 39) Ar, and fission-track geochronology. UPDATE CODE: 199715 ---------------------------------------------------------------------------------------------------------- (Reference 292) GEOREF: 1997-002398 CODEN: BUGMAF COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2006, American Geological Institute. Referenceincludes data supplied by the Geological Society of America, Boulder,CO, United States FEATURES: illus. PUBLICATION TYPE: Serial; Analytic RESOURCE LOCATION: http://www.gsajournals.org/] SPONSOR: USGSOP, Non-USGS publications with USGS authors ABSTRACT: The Eocene Big Timber stock in the Crazy Mountains of south-centralMontana is an elliptical, 8 by 13 km, compositionally and texturallydiverse composite intrusion with a well-developed radial dike swarm. Asharp intrusive contact separates its two phases: the core of theintrusion is fine-grained quartz monzodiorite, and the volumetricallydominant remainder is composed of medium-grained diorite and gabbro.Differentiation-related major oxide variation within the stock isextensive and spatially nonsystematic. However, abundances of mosttrace elements were not strongly influenced by differentiation; latezircon and apatite fractionation caused moderate heavy and slightlight rare earth element abundance depletions, respectively. Mineralcompositions and assemblages indicate crystallization between nearlyequal 950 and 700 degrees C at a pressure of nearly equal 0.8 kbar (3km). Mixing models indicate that fractionation of varying amounts ofplagioclase, orthopyroxene, clinopyroxene, magnesio-hastingsite,hornblende, biotite, titanite, apatite, and magnetite (the stock'sprincipal constituents, with quartz and potassium feldspar) andremixing of these minerals and residual liquids controlledcompositional evolution in the reservoir. Crystals apparentlynucleated at the reservoir wall while residual silicate liquid wasdisplaced inward and remixed. Some crystals were plucked from thesolidification front, as indicated

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by glomerocrysts present throughoutthe stock, and also remixed with residual liquid. Solidification ofthe reservoir represented by the stock involved heat loss to enclosingwall rock, side-wall crystallization, and subsequent, variablyeffective, crystal-liquid remixing. This process is an importantvariant of conventionally invoked models pertaining to solidificationof intrusions and explains extensive, relatively nonsystematiccompositional variation. The genesis of compositional evolution inother intrusions characterized by extensive, spatially nonsystematicvariation may result from the important process documented herein.Compositional and geologic relationships are consistent with magmagenesis related to subduction and magmatic-arc processes inboard fromthe western edge of the early Cenozoic North American plate. Arcmagmatism in south-central Montana during Eocene time is consistentwith models pertaining to early Cenozoic southward sweep and westwardretreat of magmatism. Magmatism represented by the Big Timber stockprovides significant new support for steepening subduction, westwardretreat of the subduction hinge line, and development of anasthenospheric mantle wedge that fueled renewed magmatism beneath thewestern edge of the North American continent following early Cenozoicshallow subduction. AUTHOR AFFILIATION: U. S. Geological Survey, Denver, CO, United States (USA) ACCESSION NUMBER: 1997-002398 AUTHORS: du Bray, Edward A; Harlan, S S COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: Big Timber Stock; Cenozoic; composition; Crazy Mountains;crystallization; Eocene; gabbros; geochemistry; glomerocrysts; igneousrocks; intrusions; magmas; magmatic differentiation; mantle; metals;mineral composition; mixing; Montana; monzodiorite; North America;Paleogene; plutonic rocks; polycrystalline materials; rare earths;Rocky Mountains; south-central Montana; stocks; subduction; Tertiary;textures; trace elements; U. S. Rocky Mountains; United States ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1996 SOURCE: Geological Society of America Bulletin, vol.108, no.11, pp.1404-1424,Nov 1996 TITLE: The Eocene Big Timber Stock, south-central Montana; development ofextensive compositional variation in an arc-related intrusion byside-wall crystallization and cumulate glomerocryst remixing UPDATE CODE: 199701 ---------------------------------------------------------------------------------------------------------- (Reference 293) GEOREF: 2006-071430 LATITUDE LONGITUDE: LAT ABSTRACT: The Carlin trend contains the largest concentration of Carlin-type gold deposits in the world. Two major controversies about these giant gold deposits have been their age, which is now firmly established as Eocene, and the source of heat, fluids, and metals, which remains debated. We present data that demonstrate an intense period of Eocene magmatism coincided in time and space with deposit formation and was arguably the primary heat source. Geologic studies over the last 40 years have emphasized the stratigraphy and structure of Paleozoic sedimentary rocks, which are the major ore hosts. However, four igneous episodes affected the Carlin trend, in the Jurassic, Cretaceous, Eocene, and Miocene. A Jurassic diorite-granodiorite laccolith and related dikes were

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emplaced at about 158 Ma in the northern Carlin trend. A Cretaceous granite intruded the north-central part of the trend at 112 Ma. Abundant Eocene dikes intruded along most of the trend and were accompanied by lavas in a large volcanic field along the southwest edge of the trend between approximately 40 and 36 Ma. Miocene rhyolite lavas erupted just west of and across the southern part of the trend at approximately 15 Ma. Exposed Eocene rocks consist predominantly of silicic to intermediate dikes, lavas, and epizonal intrusions, which we interpret to be sourced from a large Eocene plutonic complex underlying the Carlin trend. Eocene dikes are present in most deposits, are generally altered, but, with a few exceptions, were poor ore hosts. Distinct Eocene igneous suites, which are restricted to specific areas of the trend, are from north to south AUTHOR AFFILIATION: University of Nevada-Reno, Department of Geological Sciences, Reno, NV, United States ACCESSION NUMBER: 2006-071430 AUTHORS: Ressel, M. W.; Henry, C. D. BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alteration-; aplite-; Ar-Ar; Basin-and-Range-Province; Carlin-Trend; carlin-type-deposits; Cenozoic-; chemical-composition; dates-; dikes-; Emigrant-Deposit; emplacement-; Eocene-; fission-tracks; giant-deposits; gold-ores; Goldstrike-Laccolith; granites-; Great-Basin; host-rocks; igneous-rocks; intrusions-; lamprophyres-; magma-chambers; magmas-; magmatism-; metal-ores; mineral-composition; mineral-deposits,-genesis; mineralization-; Nevada-; North-America; northeastern-Nevada; ore-forming-fluids; Paleogene-; pegmatite-; plutonic-rocks; plutons-; Railroad-mining-district; Rain-Mine; rhyolites-; Tertiary-; U-Pb; United-States; volcanic-rocks; Welches-Canyon DOCUMENT TYPE: Serial ILLUSTRATION: Refs ISSN: 0361-0128 LANGUAGE: English ANNOTATION: Includes appendix. PUBLISHER: Economic Geology Publishing Company. Lancaster, PA, United States. 2006. PUBLICATION YEAR: 2006 REFERENCE SOURCE: GeoRef, Copyright 2006, American Geological Institute. Abstract, Copyright, Society of Economic Geologists | Reference includes data from GeoScienceWorld, Alexandria, VA, United States SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists. 101; 2, Pages 347-383. 2006. TITLE: Igneous geology of the Carlin Trend, Nevada; development of the Eocene plutonic complex and significance for carlin-type gold deposits. UPDATE CODE: 200620 URL: (Series) http ---------------------------------------------------------------------------------------------------------- (Reference 294) GEOREF: 1996-019572 CODEN: CJESAP LATITUDE LONGITUDE: LAT: N490000; N500000; LONG: W1163000; W1220000. SUMMARY LANGUAGE: French

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AUTHOR AFFILIATION: University of British Columbia, Department of Geological Sciences, Vancouver, BC, Canada ACCESSION NUMBER: 1996-019572 AUTHORS: Ghosh-Dipak-K BOOK AUTHORS: Cook-Frederick-A (editor) BOOK TITLE: In: The Southern Canadian Cordillera Transect of Lithoprobe--Le transect de la Cordillere meridionale au Canada du projet Lithoprobe. BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology; 18-Solid -earth-geophysics COUNTRY OF PUBLICATION: Canada DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 78; illus. incl. 4 tables, geol. sketch maps. ISSN: 0008-4077 LANGUAGE: English ANNOTATION: Lithoprobe Publ. No. 649. PUBLISHER: National Research Council of Canada. Ottawa, ON, Canada. 1995. PUBLICATION YEAR: 1995 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Canadian Journal of Earth Sciences = Journal Canadien des Sciences de la Terre. 32; 10, Pages 1740-1758. 1995. TITLE: Nd-Sr isotopic constraints on the interactions of the Intermontane Superterrane with the western edge of North America in the southern Canadian Cordillera. UPDATE CODE: 199607 ---------------------------------------------------------------------------------------------------------- (Reference 295) GEOREF: 2007-900010 (unpublished Georef; Navdat only) ACCESSION NUMBER: 2007-900010 AUTHORS: Saleeby-J; Ducea-M-N; Busby-C; Nadin-E; Wetmore-P-H SOURCE: In press TITLE: Chronology of Pluton Emplacement and Regional Deformation in the Southern Sierra Nevada Batholith, California ---------------------------------------------------------------------------------------------------------- (Reference 296) GEOREF: 1987-900009 (unpublished Georef; Navdat only) MONOGRAPH TITLE: Geology of the northern half of the Baker Peak quadrangle, Blaine and Custer Counties, Idaho ORGANIZATION: Idaho State University, Pocatello, ID; USA PAGES DATE: 113 pp. PUBLICATION TYPE: Thesis or dissertation; Masters; monograph ACCESSION NUMBER: 1987-900009 AUTHORS: Stewart, Dave LANGUAGE: English PUBLICATION YEAR: 1987 UPDATE CODE: 1987

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---------------------------------------------------------------------------------------------------------- (Reference 297) GEOREF: 2006-900110 (unpublished Georef; Navdat only) ACCESSION NUMBER: 2006-900110 AUTHORS: Lewis, R.S.; Frost, T.P. COUNTRY OF PUBLICATION: United States USA LANGUAGE: English PUBLICATION YEAR: 2006 SOURCE: Idaho Geological Survey Digital Analytical Data 2; part 2 TITLE: Major oxide and trace element analyses for igneous and metamorphic rock samples from northern and central Idaho ---------------------------------------------------------------------------------------------------------- (Reference 298) GEOREF: 1990-045668 CODEN: BUGMAF LATITUDE LONGITUDE: LAT: N393000; N413000; LONG: W1170000; W1184500. AUTHOR AFFILIATION: Northwest. Univ., Dep. Geol. Sci., Evanston, IL, United States ACCESSION NUMBER: 1990-045668 AUTHORS: Elison-Mark-W; Speed-Robert-C; Kistler-Ronald-W BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; age-; alkaline-earth-metals; Basin-and-Range-Province; Cenozoic-; Churchill-County-Nevada; continental-crust; Cretaceous-; crust-; dates-; geochemistry-; Great-Basin; Humboldt-County-Nevada; igneous-rocks; intrusions-; isotopes-; Jurassic-; K-Ar; Lander-County-Nevada; Mesozoic-; metals-; Nd-144-Nd-143; neodymium-; Nevada-; north-central-Nevada; Pershing-County-Nevada; plutonic-rocks; plutons-; rare-earths; Rb-Sr; Sr-87-Sr-86; stable-isotopes; strontium-; Tertiary-; United-States DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 156; illus. incl. 2 tables, sects., geol. sketch map. ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 1990. PUBLICATION YEAR: 1990 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Geological Society of America Bulletin. 102; 8, Pages 1077-1092. 1990. TITLE: Geologic and isotopic constraints on the crustal structure of the northern Great Basin. UPDATE CODE: 1990 ----------------------------------------------------------------------------------------------------------

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(Reference 299) GEOREF: 2004-026593 CODEN: GSAPAZ LATITUDE LONGITUDE: LAT: N270000; N280000; LONG: W1140000; W1151500. ABSTRACT: Mesozoic ophiolites in the Vizcaino Peninsula and Cedros Island region of Baja California Sur are suprasubduction zone Cordilleran-type ophiolites structurally juxtaposed with underlying high pressure-temperature subduction complex assemblages. The region is divided into three separate tectonostratigraphic terranes, but here we recognize stratigraphic, intrusive, and petrologic links between these terranes and interpret the evolution of the entire region within the same Late Triassic to Early Cretaceous tectonic framework. Several phases of extension are recognized, including two major phases that resulted in development of distinct ophiolite assemblages. The Late Triassic Vizcaino Peninsula Ophiolite (221+ or -2 Ma) represents the earliest stage of this history and comprises a complete spreading center sequence with depleted upper mantle and mafic crustal rocks, including sheeted dike complex. Jurassic arc magmatic rocks with low-Ti arc tholeiite and boninite geochemical affinities were intruded through and constructed on the Triassic ophiolite basement. Ultra-depleted arc-ankaramites on Cedros Island may represent an initial phase of arc rifting that was followed by major Middle Jurassic extension and production of the Cedros Island Ophiolite (173+ or -2 Ma). The Late Jurassic-Early Cretaceous Coloradito and Eugenia Formations contain mudflows and olistostrome blocks intercalated with arc volcanogenic sediment and rift-related pillow lavas; these units record extension and/or transtension and provide the earliest definite evidence of arc-continent interaction in the region. Middle Jurassic to Early Cretaceous arc plutonic rocks (ca. 165-135 Ma) were shallowly intruded into low greenschist-facies ophiolite and arc volcanic basement. Plutonic rocks range in composition from gabbro to granodiorite, but tonalite dominates. These intrusions are typical I-type Cordilleran batholithic rocks with relatively primitive arc geochemical affinities (initial (super 87) Sr/ (super 86) Sr range from approximately 0.704 to 0.706),but they are distinctly calcic in nature, a feature common to the adjacent Cretaceous Peninsular Ranges batholith. The Vizcaino-Cedros region correlates to ophiolitic terranes of the western Sierra-Klamath belt and Coast Ranges of California and Oregon that were constructed in part across the North American margin. Age, stratigraphic, and petrochemical data from the Vizcaino-Cedros region support previously proposed forearc rifting models developed for the U.S. sector of the Cordilleran orogen that interpret the ophiolite assemblages as autochthonous or parautochthonous forearc lithosphere constructed outboard of the Mesozoic continental margin arc. AUTHOR AFFILIATION: San Diego State University, Department of Geological Sciences, San Diego,CA, United States ACCESSION NUMBER: 2004-026593 AUTHORS: Kimbrough-David-L; Moore-Thomas-E BOOK AUTHORS: Johnson-Scott-E (editor); Paterson-Scott-R (editor); Fletcher-John-M (editor); Girty-Gary-H (editor); Kimbrough-David-L (editor); Martin-Barajas-Arturo (editor) BOOK TITLE: In: Tectonic evolution of northwestern Mexico and the Southwestern USA. BIB LEVEL: Analytic CATEGORY CODES: 12-Stratigraphy; 18-Solid-earth-geophysics COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkali-metals; alkaline-earth-metals; allochthons-; Ar-40-Ar-39; argon-; Baja-California; Baja-California-Sur-Mexico; basins-; California-; Cedros-Island; chemical-composition; Choyal-Formation; Coast-Ranges; Coloradito-Formation; Cordilleran-Geosyncline; correlation-;

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deformation-; Eugenia-Formation; fore-arc-basins; gabbros-; geochemistry-; granites-; granodiorites-; I-type-granites; igneous-rocks; intrusions-; island-arcs; isotope-ratios; isotopes-; Klamath-Mountains; lithosphere-; mafic-composition; major-elements; Mesozoic-; metals-; metamorphic-rocks; Mexico-; mineral-composition; models-; nesosilicates-; noble-gases; ophiolite-; ophiolite-complexes; Oregon-; orthosilicates-; paleoenvironment-; paleogeography-; petrology-; plate-tectonics; plutonic-rocks; radioactive-isotopes; Rb-87-Sr-86; rubidium-; San-Andres-Cedros-Complex; sedimentary-rocks; silicates-; stable-isotopes; stratigraphic-units; stratigraphy-; strontium-; subduction-zones; tectonics-; tectonostratigraphic-units; terranes-; trace-elements; U-Pb; United-States; Valle-Group; Vizcaino-Peninsula; volcanic-rocks; volcanism-; zircon- DOCUMENT TYPE: Serial ISBN: 0-8137-2374-4 ILLUSTRATION: Refs: 123; illus. incl. 5 tables, geol. sketch maps. ISSN: 0072-1077 LANGUAGE: English PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 2003. PUBLICATION YEAR: 2003 REFERENCE SOURCE: GeoRef, Copyright 2004, American Geological Institute. RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Special Paper - Geological Society of America. 374; Pages 43-71. 2003. TITLE: Ophiolite and volcanic arc assemblages on the Vizcaino Peninsula and Cedros Island, Baja California Sur, Mexico; Mesozoic forearc lithosphere of the Cordilleran magmatic arc. UPDATE CODE: 200408 ---------------------------------------------------------------------------------------------------------- (Reference 300) GEOREF: 2004-026604 CODEN: GSAPAZ LATITUDE LONGITUDE: LAT: N323000; N331500; LONG: W1160000; W1170000. ABSTRACT: Biotite and K-feldspar (super 40) Ar/ (super 39) Ar systems from the east-central Peninsular Ranges batholith near 33 degrees N were affected by two distinct phases of Late Cretaceous rapid cooling. The 85-Ma biotite K-Ar isochron separates comparatively shallow rocks in the southwest that record earlier cooling (91-86 Ma) from deeper rocks in the northeast that record later cooling (78-68 Ma). Samples close to 85 Ma isochron record both episodes of rapid cooling as well as slower cooling between 86 and 78 Ma. Although the 85 Ma isochron also coincides with a steep (1-2 m.y./km) K-Ar age gradient, only localized faulting has been detected along it. We attribute 91-86 Ma cooling to denudation related to emplacement of the voluminous suite of 96+ or -3 Ma La Posta plutons. In contrast, we link cooling after 78 Ma to Laramide shallow subduction beneath the Peninsular Ranges batholith. Our numerical simulations indicate that the latter cooling phase can be explained by either pure erosional denudation or by subduction refrigeration beginning at 80 Ma. In the latter case, erosional denudation occurs during steady-state shallow subduction. While final erosion depths predicted by the two models differ significantly (as much as 20 km for pure erosional denudation but only 11 km for subduction refrigeration followed by erosion), both are within the range indicated by independent thermobarometry of the eastern batholith. Based upon the similarity of independently determined denudation histories from Peninsular Ranges

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batholith basement rocks and forearc sediments that onlap the northern Peninsular Ranges batholith, we conclude that erosional denudation was probably the most important process between 78 and 68 Ma. We speculate that removal of lower crust and lithospheric mantle beneath the east-central Peninsular Ranges batholith during Laramide shallow subduction triggered erosional denudation and localized thrusting until the density balance between the crust and mantle was restored in latest Cretaceous-early Tertiary time. AUTHOR AFFILIATION: University of California at Los Angeles, Department of Earth and Space Sciences, Los Angeles, CA, United States ACCESSION NUMBER: 2004-026604 AUTHORS: Grove-Marty; Lovera-Oscar; Harrison-Mark BOOK AUTHORS: Johnson-Scott-E (editor); Paterson-Scott-R (editor); Fletcher-John-M (editor); Girty-Gary-H (editor); Kimbrough-David-L (editor); Martin-Barajas-Arturo (editor) BOOK TITLE: In: Tectonic evolution of northwestern Mexico and the Southwestern USA. BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 18-Solid-earth-geophysics COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; Ar-Ar; Baja-California; basins-; batholiths-; California-; Cenozoic-; chemical-composition; cooling-; Cretaceous-; dates-; deformation-; denudation-; diorites-; emplacement-; erosion-; faults-; fore-arc-basins; geochemistry-; igneous-rocks; intrusions-; isotope-ratios; La-Posta-Pluton; Laramide-Orogeny; Little-Blair-Valley; magmas-; Mason-Valley; melts-; Mesozoic-; metamorphic-rocks; Mexico-; mineral-assemblages; mineral-composition; North-America; paleoenvironment-; Peninsular-Ranges; Peninsular-Ranges-Batholith; petrology-; plate-tectonics; plutonic-rocks; sedimentation-; stratigraphic-units; subduction-; tectonics-; Tertiary-; tonalite-; United-States; uplifts-; Upper-Cretaceous; Vallecito-Valley DOCUMENT TYPE: Serial ISBN: 0-8137-2374-4 ILLUSTRATION: Refs: 139; illus. incl. 3 tables, geol. sketch maps. ISSN: 0072-1077 LANGUAGE: English ANNOTATION: Includes appendices. PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 2003. PUBLICATION YEAR: 2003 REFERENCE SOURCE: GeoRef, Copyright 2004, American Geological Institute. SOURCE: Special Paper - Geological Society of America. 374; Pages 355-379. 2003. TITLE: Late Cretaceous cooling of the east-central Peninsular Ranges Batholith (33 degrees N); relationship to La Posta Pluton emplacement, Laramide shallow subduction, and forearc sedimentation. UPDATE CODE: 200408 ---------------------------------------------------------------------------------------------------------- (Reference 301) GEOREF: 1983-055838 LATITUDE LONGITUDE: LAT: N443730; N444500; LONG: W1183000; W1183730. MAP TYPE: color-economic-geology-maps ACCESSION NUMBER: 1983-055838 BOOK AUTHORS: Brooks-H-C; Ferns-M-L; Wheeler-G-R; Avery-D-G BOOK TITLE: Geology and gold deposits map of the northeast quarter of the Bates

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Quadrangle, Baker and Grant counties, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Baker-County-Oregon; Bates-Quadrangle; economic-geology; economic-geology-maps; gold-ores; Grant-County-Oregon; maps-; metal-ores; Oregon-; placers-; United-States DOCUMENT TYPE: Map; Serial ILLUSTRATION: Refs: 14; 2 tables, sects. ISSN: 0270-952X LANGUAGE: English MAP TYPE: color-economic-geology-maps MAP SCALE: 1:24,000 PUBLISHER: Oregon Department of Geology and Mineral Industries. Portland, OR, United States. Pages: 1 sheet. 1983. PUBLICATION YEAR: 1983 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Geological Map Series (Portland). GMS-29; 1983. UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 302) GEOREF: 1983-057467 LATITUDE LONGITUDE: LAT: N444500; N445230; LONG: W1182230; W1183000. MAP TYPE: color-economic-geology-maps ACCESSION NUMBER: 1983-057467 BOOK AUTHORS: Brooks-H-C; Ferns-M-L; Mullen-E-D BOOK AUTHOR AFFILIATION: Dep. Geol. and Miner. Resour., Portland, OR, United States BOOK TITLE: Geology and gold deposits map of the Granite Quadrangle, Grant County, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: economic-geology; economic-geology-maps; gold-ores; Granite-Quadrangle; Grant-County-Oregon; maps-; metal-ores; Oregon-; United-States DOCUMENT TYPE: Map; Serial ILLUSTRATION: Refs: 15; 2 tables, sects. ISSN: 0270-952X LANGUAGE: English MAP TYPE: color-economic-geology-maps MAP SCALE: 1:24,000 PUBLISHER: Oregon Department of Geology and Mineral Industries. Portland, OR, United States. Pages: 1 sheet. 1982. PUBLICATION YEAR: 1982 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Geological Map Series (Portland). 25; 1982. UPDATE CODE: 1983 ----------------------------------------------------------------------------------------------------------

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(Reference 303) GEOREF: 1983-057468 LATITUDE LONGITUDE: LAT: N443730; N444500; LONG: W1182230; W1183000. MAP TYPE: color-economic-geology-maps ACCESSION NUMBER: 1983-057468 BOOK AUTHORS: Ferns-M-L; Brooks-A-C; Avery-D-G BOOK AUTHOR AFFILIATION: Dep. Geol. and Miner. Ind., Portland, OR, United States BOOK TITLE: Geology and gold deposits map of the Greenhorn Quadrangle, Baker and Grant counties, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Baker-County-Oregon; economic-geology; economic-geology-maps; gold-ores; Grant-County-Oregon; Greenhorn-Quadrangle; maps-; metal-ores; Oregon-; United-States DOCUMENT TYPE: Map; Serial ILLUSTRATION: Refs: 10; 1 table, sects. ISSN: 0270-952X LANGUAGE: English MAP TYPE: color-economic-geology-maps MAP SCALE: 1:24,000 PUBLISHER: Oregon Department of Geology and Mineral Industries. Portland, OR, United States. Pages: 1 sheet. 1983. PUBLICATION YEAR: 1983 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Geological Map Series (Portland). 28; 1983. UPDATE CODE: 1983 ---------------------------------------------------------------------------------------------------------- (Reference 304) GEOREF: 1984-051832 LATITUDE LONGITUDE: LAT: N443730; N444500; LONG: W1183730; W1184500. MAP TYPE: color-economic-geology-maps ACCESSION NUMBER: 1984-051832 BOOK AUTHORS: Ferns-M-L; Brooks-H-C; Wheeler-G-R BOOK TITLE: Geology and gold deposits map of the northwest quarter of the Bates Quadrangle, Grant County, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Bates-Quadrangle; economic-geology; economic-geology-maps; gold-ores; Grant-County-Oregon; maps-; metal-ores; Oregon-; placers-; United-States DOCUMENT TYPE: Map; Serial ILLUSTRATION: Refs: 7; sects., 2 tables. ISSN: 0270-952X LANGUAGE: English MAP TYPE: color-economic-geology-maps MAP SCALE: 1:24,000 PUBLISHER: Oregon Department of Geology and Mineral Industries. Portland, OR, United States. Pages: 1 sheet. 1984. PUBLICATION YEAR: 1984 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute.

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SOURCE: Geological Map Series (Portland). GMS-31; 1984. UPDATE CODE: 1984 ---------------------------------------------------------------------------------------------------------- (Reference 305) GEOREF: 1985-035006 LATITUDE LONGITUDE: LAT: N443000; N443730; LONG: W1183730; W1184500. MAP TYPE: color-geologic-maps ACCESSION NUMBER: 1985-035006 BOOK AUTHORS: Brooks-H-C; Ferns-Mark-L; Avery-D-G BOOK TITLE: Geology and gold deposits map of the southwest quarter of the Bates Quadrangle, Grant County, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 14-Geologic-maps; 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: areal-geology; Bates-Quadrangle; economic-geology; economic-geology-maps; geologic-maps; gold-ores; Grant-County-Oregon; maps-; metal-ores; Oregon-; United-States DOCUMENT TYPE: Map; Serial ILLUSTRATION: Refs: 25; 2 tables, sects. ISSN: 0270-952X LANGUAGE: English MAP TYPE: color-geologic-maps MAP SCALE: 1:24,000 PUBLISHER: Oregon Department of Geology and Mineral Industries. Portland, OR, United States. Pages: 1 sheet. 1984. PUBLICATION YEAR: 1984 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Geological Map Series (Portland). GMS-35; 1984. UPDATE CODE: 1985 ---------------------------------------------------------------------------------------------------------- (Reference 306) GEOREF: 1988-008028 CODEN: #00282 MAP TYPE: color-geologic-maps ACCESSION NUMBER: 1988-008028 BOOK AUTHORS: Ferns-Mark-L; Brooks-Howard-C; Avery-Dan-G; Blome-Charles-D BOOK AUTHOR AFFILIATION: Oreg. Dep. Geol. and Miner. Ind., Portland, OR, United States; U. S. Dep. Agric. Forest Serv., United States; U. S. Geol. Surv., United States BOOK TITLE: Geology and mineral resources map of the Elkhorn Peak Quadrangle, Baker County, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 14-Geologic-maps; 26A-Economic-geology,-general,-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: areal-geology; Baker-County-Oregon; economic-geology; Elkhorn-Peak-Quadrangle; geologic-maps; maps-; mineral-resources; Oregon-; United-States DOCUMENT TYPE: Map; Serial

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ILLUSTRATION: Refs: 16; 4 tables, sects. ISSN: 0270-952X LANGUAGE: English MAP TYPE: color-geologic-maps MAP SCALE: 1:24,000 PUBLISHER: Oregon Department of Geology and Mineral Industries. Portland, OR, United States. Pages: 2 sheets. 1987. PUBLICATION YEAR: 1987 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Geological Map Series (Portland). 41; 1987. UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 307) GEOREF: 2006-075627 CODEN: #01662 LATITUDE LONGITUDE: LAT: N450000; N454500; LONG: W1173000; W1184500. MAP TYPE: color-geologic-maps ACCESSION NUMBER: 2006-075627 BOOK AUTHORS: Ferns-Mark-L; McConnell-Vicki-S; Madin-Ian-P; Johnson-Jenda-A BOOK AUTHOR AFFILIATION: Oregon Department of Geology & Mineral Industries, Portland, OR, United States; U. S. Geological Survey, United States BOOK TITLE: Geology of the upper Grande Ronde River basin, Union County, Oregon. BIB LEVEL: Monograph CATEGORY CODES: 14-Geologic-maps COUNTRY OF PUBLICATION: United-States DESCRIPTORS: areal-geology; cross-sections; faults-; folds-; geologic-maps; Grande-Ronde-River-basin; hydrology-; lithostratigraphy-; maps-; mineral-resources; natural-resources; Oregon-; petrology-; stratigraphic-units; surficial-geology; tectonic-elements; Union-County-Oregon; United-States DOCUMENT TYPE: Map; Serial; Report ILLUSTRATION: Refs: 95; illus. incl. sects. LANGUAGE: English SOURCE MEDIUM: compact disc MAP TYPE: color-geologic-maps MAP SCALE: 1:125,000 PUBLISHER: Oregon Department of Geology and Mineral Industries. Portland, OR, United States. Pages: 1 disc. 2006. PUBLICATION YEAR: 2006 REFERENCE SOURCE: GeoRef, Copyright 2006, American Geological Institute. REPORT NUMBER: O-06-19 RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Open File Report - State of Oregon, Department of Geology and Mineral Industries. 2006. UPDATE CODE: 200621 ---------------------------------------------------------------------------------------------------------- (Reference 308)

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GEOREF: 2001-030979 ---------------------------------------------------------------------------------------------------------- (Reference 309) GEOREF: 1995-068600 CODEN: GSAPAZ LATITUDE LONGITUDE: LAT: N490500; N501830; LONG: W1164100; W1174900. AUTHOR AFFILIATION: University of Alberta, Department of Geology, Edmonton, AB, Canada ACCESSION NUMBER: 1995-068600 AUTHORS: Ghosh-Dipak-K; Lambert-Richard-St-J BOOK AUTHORS: Miller-David-M (editor); Busby-Cathy (editor) BOOK TITLE: In: Jurassic magmatism and tectonics of the North American Cordillera. BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 02D-Isotope-geochemistry COUNTRY OF PUBLICATION: United-States DOCUMENT TYPE: Serial ISBN: 0-8137-2299-3 ILLUSTRATION: Refs: 70; illus. incl. 2 tables, geol. sketch map. ISSN: 0072-1077 LANGUAGE: English ANNOTATION: Includes two appendices. PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 1995. PUBLICATION YEAR: 1995 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Special Paper - Geological Society of America. 299; Pages 141-157. 1995. TITLE: Nd-Sr isotope geochemistry and petrogenesis of Jurassic granitoid intrusives, Southeast British Columbia, Canada. UPDATE CODE: 199524 ---------------------------------------------------------------------------------------------------------- (Reference 310) GEOREF: 2005-004738 LATITUDE LONGITUDE: LAT: N374500; N380000; LONG: W1183000; W1190000. ABSTRACT: The Long Valley Volcanic Field in east-central California straddles the East Sierran frontal fault zone, overlapping the Sierra Nevada and western Basin and Range Provinces. Long Valley volcanism began about 4 Ma during Pliocene time and has continued intermittently through the Holocene. The current (post-1980) seismic unrest at Long Valley, accompanied by uplift of the resurgent dome, may signal the onset of a new episode of regional extension and basalt injection into the residual magma chamber. ACCESSION NUMBER: 2005-004738 AVAILABILITY: U. S. Geol. Surv., Denver, CO, United States BOOK AUTHORS: Bailey-Roy-A BOOK AUTHOR AFFILIATION: U. S. Geological Survey, USA, United States BOOK TITLE: Eruptive history and chemical evolution of the precaldera and postcaldera basalt-dacite sequences, Long Valley, California; implications for

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magma sources, current seismic unrest, and future volcanism. BIB LEVEL: Monograph CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: basalts-; California-; Cenozoic-; dacites-; eruptions-; geochemistry-; Holocene-; igneous-rocks; lava-; Long-Valley-Caldera; magmas-; major-elements; metals-; Mono-County-California; Mono-Inyo-Suite; Neogene-; Pliocene-; Quaternary-; rare-earths; seismicity-; Tertiary-; trace-elements; trachyandesites-; United-States; USGS-; volcanic-fields; volcanic-rocks; volcanism- DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs: 190; illus. incl. 6 tables, geol. sketch maps. ISSN: 1044-9612 LANGUAGE: English PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 75. 2004. PUBLICATION YEAR: 2004 REFERENCE SOURCE: GeoRef, Copyright 2005, American Geological Institute. REPORT NUMBER: P 1692 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: U. S. Geological Survey Professional Paper. 2004. UPDATE CODE: 200502 ---------------------------------------------------------------------------------------------------------- (Reference 311) GEOREF: 1978-026007 CODEN: BUGMAF COLLECTION AUTHORS: 05, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2006, American Geological Institute. FEATURES: References: 30; illus. incl. table, geol. sketch map LATITUDE LONGITUDE: Latitude:N234500,N241500 Longitude:W1043000,W1050000 PUBLICATION TYPE: Serial; Analytic RESOURCE LOCATION: [URL:http://www.gsajournals.org/] AUTHOR AFFILIATION: Bear Creek Min. Co., United States (USA) ACCESSION NUMBER: 1978-026007 AUTHORS: Swanson, E R; Keizer, R P; Lyons, J I; Clabaugh, S E COLLECTION AUTHORS: 05, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: andesites; ash-flow tuff; basalts; calderas; Cenozoic; chemical composition; data; Durango Mexico; eruptions; evolution; geochemistry; igneous rocks; lava; lava fields; lithostratigraphy; mafic composition; Mexico; mineral composition; Miocene; Neogene; Oligocene; Paleogene; petrology; pyroclastics; rhyolites; Sierra Madre Occidental; stratigraphy; Tertiary; tuff; volcanic features; volcanic rocks; volcanism; volcanology ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 1978 SOURCE: Geological Society of America Bulletin, vol.89, no.7, pp.1000-1012, Jul 1978 TITLE: Tertiary volcanism and caldera development near Durango City, Sierra Madre Occidental, Mexico UPDATE CODE: 1978

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---------------------------------------------------------------------------------------------------------- (Reference 312) GEOREF: 1995-031933 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. LATITUDE LONGITUDE: Latitude:N443600,N443600 Longitude:W1142800,W1142800 MONOGRAPH TITLE: The Twin Peaks Caldera, Challis, Idaho; a unique window into theemplacement and evolution of a caldera-filling ignimbrite ORGANIZATION: University of Idaho, Moscow, ID, United States USA PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 1995-031933 AUTHORS: Jellinek, Andrew Mark COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: calderas; Casto Pluton; Cenozoic;Challis Idaho; Challis Volcanics; Custer County Idaho; emplacement; feldspar group; geologic thermometry; Idaho; ignimbrite; isotopes; magma chambers; magmas; majorelements; O-18/O-16; oxygen; P-Tconditions; petrology; pyroclastic flows; rare earths; stable isotopes; Tertiary; trace elements; tuff;Tuff of Challis Creek; Twin Peaks Caldera; volcanicfeatures; volcanic rocks; volcanism; LANGUAGE: English PUBLICATION YEAR: 1994 UPDATE CODE: 1995 ---------------------------------------------------------------------------------------------------------- (Reference 313) GEOREF: 2000-053344 COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: illus. LATITUDE LONGITUDE: Latitude:N433500,N445400 Longitude:W1131900,W1151800 ;Latitude:N423500,N435900 Longitude:W1130000,W1150000 MONOGRAPH TITLE: Geology and petrology of the Eocene Ibex Canyon igneous complex,Custer and Blaine counties, Idaho ORGANIZATION: Idaho State University, Pocatello, ID, United States (USA) PAGES DATE: 177 pp. PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ACCESSION NUMBER: 2000-053344 AUTHORS: Schmidt, Keegan L COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: Blaine County Idaho; Cenozoic; Custer County Idaho; Eocene; IbexCanyon Complex; Idaho; igneous rocks; Paleogene; petrography;Tertiary; United States LANGUAGE: English PUBLICATION YEAR: 1994 UPDATE CODE: 200018

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---------------------------------------------------------------------------------------------------------- (Reference 314) GEOREF: 1986-015490 CODEN: JGEOAZ COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous andmetamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 46; illus. incl. 6 tables, geol. sketch map LATITUDE LONGITUDE: Latitude:N460000,N464500 Longitude:W1141500,W1151000 PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Univ. Kans., Dep. Geol., Lawrence, KS, United States USA ACCESSION NUMBER: 1986-015490 AUTHORS: Shuster, R D; Bickford, M E COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous andmetamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; alkaline earth metals; batholiths; calc-alkaliccomposition; Clearwater County Idaho; country rocks; dates;east-central Montana; genesis; geochemistry; Idaho; Idaho Batholith;Idaho County Idaho; inclusions; intrusions; isotopes; lead; majorelements; metagranite; metaigneous rocks; metals; metamorphic rocks;metaplutonic rocks; Montana; nesosilicates; North America;orthosilicates; petrography; petrology; rare earths; ratios; RavalliCounty Montana; Rb/Sr; Rocky Mountains; silicates; Sr-87/Sr-86; stableisotopes; strontium; trace elements; U/Pb; United States; west-centralMontana; zircon ISSN: 0022-1376 LANGUAGE: English PUBLICATION YEAR: 1985 SOURCE: Journal of Geology, vol.93, no.6, pp.727-742, Nov 1985 TITLE: Chemical and isotopic evidence for the petrogenesis of thenortheastern Idaho Batholith UPDATE CODE: 1986 ---------------------------------------------------------------------------------------------------------- (Reference 315) GEOREF: 1997-015030 AUTHOR AFFILIATION: University of Florida, Department of Geology, Gainesville, FL, United States ACCESSION NUMBER: 1997-015030 AUTHORS: Mueller-P-A; Heatherington-A-L; D-Arcy-K-A; Wooden-J-L; Nutman-A-P CATEGORY CODES: 03-Geochronology DESCRIPTORS: absolute-age; batholiths-; continental-crust; crust-; dates-; diorites-; granites-; granodiorites-; hornblende-diorite; igneous-rocks; intrusions-; Madison-County-Montana; Montana-; nesosilicates-; North-America; orthosilicates-; plutonic-rocks; Precambrian-; quartz-monzonite; Rocky-Mountains; silicates-; Sm-Nd; southwestern-Montana; Tobacco-Root-Mountains; U.-S.-Rocky-Mountains; U-Pb; United-States; whole-rock; zircon- LANGUAGE: English PUBLICATION YEAR: 1996 SOURCE: Tectonophysics. 265; 1-2, Pages 169-179. 1996.

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TITLE: Contrasts between Sm-Nd whole-rock and U-Pb zircon systematics in the Tobacco Root Batholith, Montana; implications for the determination of crustal age provinces. UPDATE CODE: 199705 ---------------------------------------------------------------------------------------------------------- (Reference 316) GEOREF: 1987-068572 CODEN: XGPPA9 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments; 03 Geochronology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. BOOK EDITORS: Vallier, Tracy L; Brooks, Howard C FEATURES: References: 95; illus. incl. 5 tables, geol. sketch map MONOGRAPH TITLE: Geology of the Blue Mountains region of Oregon, Idaho, and Washington; the Idaho Batholith and its border zone PUBLICATION TYPE: Serial; Report; Analytic SPONSOR: USGS, Publications of the U. S. Geological Survey AUTHOR AFFILIATION: U. S. Geol. Surv., USA, (United States) ACCESSION NUMBER: 1987-068572 AUTHORS: Criss, Robert E; Fleck, Robert J COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments; 03 Geochronology COUNTRY OF PUBLICATION: United States (USA) ISSN: 1044-9612 LANGUAGE: English PUBLICATION YEAR: 1987 RESEARCH PROGRAM: P 1436 SOURCE: U. S. Geological Survey Professional Paper, Report: P 1436, pp.95-137, 1987 TITLE: Petrogenesis, geochronology, and hydrothermal systems of the northern Idaho Batholith and adjacent areas based on (super 18?O/ (super 16?O, D/H, (super 87?Sr/ (super 86?Sr, K-Ar, and (super 40?Ar/ (super 39?Ar studies UPDATE CODE: 1987 ---------------------------------------------------------------------------------------------------------- (Reference 317) GEOREF: 1992-057192 ACCESSION NUMBER: 1992-057192 AVAILABILITY: University Microfilms, Ann Arbor, MI, United States BOOK AUTHORS: Lang-James-Robert BOOK TITLE: Isotopic and geochemical characteristics of Laramide igneous rocks in Arizona. BIB LEVEL: Monograph CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 27A-Economic-geology,-geology-of-ore-deposits COUNTRY OF PUBLICATION: United-States DESCRIPTORS: alkaline-earth-metals; anatexis-; Arizona-; assimilation-; copper-ores; crust-; economic-geology; genesis-; geochemistry-; igneous-processes;

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igneous-rocks; isotopes-; Laramide-Orogeny; melts-; metal-ores; metals-; mineral-deposits,-genesis; Nd-144-Nd-143; neodymium-; petrology-; porphyry-copper; rare-earths; ratios-; Sr-87-Sr-86; stable-isotopes; strontium-; trace-elements; United-States; volatiles- DEGREE GRANTED: Doctoral DEGREE GRANTING INSTITUTION: University of Arizona. Tucson, AZ, United States. Pages: 201. 1991. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1991 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 1992 ---------------------------------------------------------------------------------------------------------- (Reference 318) GEOREF: 2005-073783 CODEN: #01662 LATITUDE LONGITUDE: LAT: N445600; N455100; LONG: W1171700; W1184200. ABSTRACT: One of the major processes for removal bacteria from seeping water during soil passage is adsorption. Microcosm study was carried out on 8 ferralitic soil horizons (H (sub 1) -H (sub 8) ) separating the soil surface from the underground water table, in the equatorial region in Cameroon. It aimed in assess the soil particles adsorption potentials for S. faecalis. It resulted that bacterial sorption on soil particles occurs swiftly during the first 30 minutes of incubation of aqueous medium containing bacteria and soil particles. By application of Freundlich isotherms, it is noted that soil horizons adsorption coefficient which is a measure of the adsorption capacity vary from 3 to 27632 adsorbed cells.mg (super -1) of soil particles. Although no gradient of adsorption potential has been observed amongst horizons, the adsorption is relatively weak at horizons H (sub 4) and H (sub 5) which are located near the middle of soil column. The adsorption is relatively pronounced at the upper horizon H (sub 3) and the deeper horizon H (sub 7) . The linearity coefficient inversely proportional to the adsorption intensity vary from 0,4483 to 2,2123 with greatest values related to horizons H (sub 2) to H (sub 5) , and lowest values related to horizons H (sub 7) and H (sub 8) . The variability of soil horizon adsorption potentials would be due to the variability of bacterial fixation sites properties located at soil particle surfaces. It seems convenient to carry out other experiments with several cell species together in order to predict the interactions nature among bacterial cells for the attach sites or group of sites on soil surface particles. ACCESSION NUMBER: 2005-073783 BOOK AUTHORS: Ferns-Mark-L; Madin-Ian-P; McConnell-Vicki-S; Beaulieu-John-D; Johnson-Jenda-J BOOK AUTHOR AFFILIATION: Oregon Department of Geology and Mineral Industries, USA, United States; U. S. Geological Survey, United States BOOK TITLE: Geology of the surface and subsurface of the southern Grande Ronde Valley and lower Catherine Creek drainage, Union County, Oregon 2002. BIB LEVEL: Monograph CATEGORY CODES: 13-Areal-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: areal-geology; bedrock-; Catherine-Creek-basin; Columbia-River-basin; geochemistry-; geomorphology-; Grande-Ronde-Valley; hydrology-; lithostratigraphy-; Oregon-; petrology-; surficial-geology; tectonic-elements;

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Union-County-Oregon; United-States DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs: 53; illus. incl. 3 tables, geol. sketch maps. LANGUAGE: English SOURCE MEDIUM: compact disc ANNOTATION: Includes appendices. PUBLISHER: Oregon Department of Geology and Mineral Industries. Portland, OR, United States. Pages: 1 disc. 2002. PUBLICATION YEAR: 2002 REFERENCE SOURCE: GeoRef, Copyright 2005, American Geological Institute. AGI REPORT NUMBER: O-02-02 RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Open File Report - State of Oregon, Department of Geology and Mineral Industries. 2002. UPDATE CODE: 200524 ---------------------------------------------------------------------------------------------------------- (Reference 319) GEOREF: 1992-052257 CODEN: BUGMAF ABSTRACT: Jurassic and Early Cretaceous plutons in the Klamath Mountains province of California and Oregon were intruded both before and after thrusting during the Nevadan orogeny (ca. 155-148 Ma). Plutons intruded before Nevadan thrusting range from calc-alkalic to calcic and display a range of compositions that changes consistently with time. Among this group, Rb, K (sub 2) O, and initial (super 87) Sr/ (super 86) Sr (Sr (sub i) ; range 0.7034 to 0.7047) decrease and epsilon Nd (range 2.0 to 4.8) increases in younger plutons. Within individual plutons, Sr (sub i) varies considerably, whereas epsilon Nd is nearly constant. The Sr and Nd isotopic data typically plot to the right of the mantle array. delta (super 18) O values in these plutons are greater than +8 per mil. Tonalitic and trondhjemitic plutons intruded after Nevadan thrusting are typically calcic, contain low Rb and K (sub 2) O contents, and have delta (super 18) O less than +8 per mil. These plutons have a narrow range of Sr (sub i) (0.7033-0.7036) and epsilon Nd (4.7 to 7.4); values that plot in the mantle array. The isotopic compositions of the pre-Nevadan plutons requires assimilation of metasedimentary rocks or mixing with crustal melts at deep-crustal levels. The deep-crustal component is not exposed in the province and was presumably truncated during Nevadan thrusting. Post-Nevadan plutons show little evidence of assimilation of metasedimentary crust but display trace-element evidence (low K (sub 2) O, Rb, and rare-earth element concentrations) consistent with an origin by partial melting of young ophiolitic rocks underthrust during the Nevadan orogeny. AUTHOR AFFILIATION: Tex. Tech Univ., Dep. Geosci., Lubbock, TX, United States ACCESSION NUMBER: 1992-052257 AUTHORS: Barnes-Calvin-G; Petersen-Scott-W; Kistler-R-W; Prestvik-Tore; Sundvoll-B BIB LEVEL: Analytic CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology; 16-Structural-geology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkaline-earth-metals; assimilation-; California-; Cretaceous-; Curry-County-Oregon; Del-Norte-County-California; faults-; geochemistry-; Humboldt-County-California; igneous-rocks; intrusions-; isotopes-

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; Jackson-County-Oregon; Josephine-County-Oregon; Jurassic-; Klamath-Mountains; Lower-Cretaceous; magmas-; major-elements; Mesozoic-; metals-; metamorphic-rocks; Nd-144-Nd-143; neodymium-; Nevadan-Orogeny; Northern-California; O-18-O-16; Oregon-; oxygen-; plutonic-rocks; plutons-; rare-earths; Siskiyou-County-California; southwestern-Oregon; Sr-87-Sr-86; stable-isotopes; strontium-; tectonics-; thrust-faults; trace-elements; Trinity-County-California; United-States DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 64; illus. incl. sects., 4 tables, geol. sketch map. ISSN: 0016-7606 LANGUAGE: English PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 1992. PUBLICATION YEAR: 1992 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Geological Society of America Bulletin. 104; 1, Pages 117-126. 1992. TITLE: Tectonic implications of isotopic variation among Jurassic and Early Cretaceous plutons, Klamath Mountains. UPDATE CODE: 1992 ---------------------------------------------------------------------------------------------------------- (Reference 320) GEOREF: 1990-002343 CODEN: XDIGAS LATITUDE LONGITUDE: LAT: N370000; N380000; LONG: W1180000; W1200000. ABSTRACT: Analytical data are reported for a comprehensively studied suite of samples of mafic inclusions, aggregates or schlieren, dikes, and their host granitoids from 12 localities in the central Sierra Nevada. Modes are given for 61 of the samples, and major-element oxide and selected trace-element concentrations are tabulated for 81. Chemical analyses are presented for coexisting hornblendes and biotites in the inclusions, dikes, aggregates, and their host granitoids. ACCESSION NUMBER: 1990-002343 BOOK AUTHORS: Barbarin-Bernard; Dodge-F-C-W; Kistler-R-W; Bateman-P-C BOOK AUTHOR AFFILIATION: Univ. Paris-Sud, Lab. Petrogr.-Volcanol., Orsay, France; U. S. Geol. Surv., United States BOOK TITLE: Mafic inclusions, aggregates, and dikes in granitoid rocks, central Sierra Nevada Batholith, California; analytic data. BIB LEVEL: Monograph CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: amphibole-group; batholiths-; biotite-; California-; Central-California; chain-silicates; clinoamphibole-; coexisting-minerals; composition-; dikes-; diorites-; Fresno-County-California; geochemistry-; granites-; granodiorites-; hornblende-; igneous-rocks; inclusions-; intrusions-; isotopes-; Madera-County-California; mafic-composition; major-elements; mica-group; mineral-composition; modal-analysis; petrology-; plutonic-rocks; schlieren-; sheet-silicates; Sierra-Nevada; Sierra-Nevada-Batholith; silicates-; textures-; tonalite-; trace-elements; Tuolumne-County-California; United-States; USGS- DOCUMENT TYPE: Serial; Report ILLUSTRATION: Refs: 30; illus. incl. 8 tables, geol. sketch map.

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ISSN: 8755-531X LANGUAGE: English PUBLISHER: U. S. Geological Survey. Reston, VA, United States. Pages: 27. 1989. PUBLICATION YEAR: 1989 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. REPORT NUMBER: B 1899 RESEARCH PROGRAM: USGS (Publications of the U. S. Geological Survey) SOURCE: U. S. Geological Survey Bulletin. 1989. UPDATE CODE: 1990 URL: (Availability) http://ngmsvr.wr.usgs.gov/Prodesc/proddesc_22075.htm ---------------------------------------------------------------------------------------------------------- (Reference 321) GEOREF: 1998-009065 COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2006, American Geological Institute. FEATURES: References: 54; illus. incl. 2 plates LATITUDE LONGITUDE: Latitude:N383000,N390000 Longitude:W1050000,W1063000 MONOGRAPH TITLE: Geochemical characteristics and magma evolution of the Whitehorn Stock, Chaffee, Fremont and Park counties, Colorado ORGANIZATION: Colorado School of Mines, Golden, CO, United States (USA) PUBLICATION TYPE: Thesis or dissertation; Master's; Monographic ABSTRACT: The major objectives of this study were to investigate the geology and geochemical characteristics of the Whitehorn stock in order to evaluate its evolution and origin. The study included detailed mapping of the stock and petrographic and geochemical analyses of collected samples. The information was used to constrain models for magma emplacement and evolution and to speculate about magma genesis. The Whitehorn stock is situated at the southern end of the Mosquito Range, northeast of Salida, in central Colorado and comprises two main intrusive bodies (named the northern and the southern) and three small satellite bodies. The main bodies are roughly elongate in a northwest-southeast direction, parallel to fold axes of Paleozoic country-rocks and are separated from each other by a paleovalley. The potassium-argon ages from biotite, 66.0+ or -1.7 to 70.8+ or -2.1 million years, indicate that the intrusion was emplaced during the Late Cretaceous (early Maestrichtian), coincident with early stages of Laramide tectonics. The Whitehorn Stock was originally intruded as a concordant, lenticular-shape laccolith. Shape, foliation, and internal contacts of the intrusion suggest that the Whitehorn Stock is a diapiric intrusion formed by emplacement of multiple pulses of magma rather than as a single injection. The compositional variation (gross zoning) within the Whitehorn Stock was produced by a combination of both in situ fractionation and injection of multiple pulses of magma. The Whitehorn Stock can be classified as a high-K calc-alkaline, I-type granitoid intrusion system. Compositions based on modal mineralogy in the Whitehorn stock and its satellite bodies range from granite to syenogabbro. The main body, which is mostly of granodioritic composition, is fine to medium grained and medium gray in color. Xenoliths of hornfels and carbonates are commonly found in the outer part of the northern body. Dark green hornblende xenocrysts are common in the southern body. Inclusions of more mafic composition are found throughout both the northern and southern bodies. Three physically distinguishable units occur in the northern body, including a mafic, a diorite-granodiorite, and a granite unit. Rocks of the mafic unit are only exposed on a small hill near the Marble Quarry. The diorite-granodiorite unit is most

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abundant, making up most of the main body, and the granite unit is present mainly in the central area of the northern body. The body has a gross compositional zonation from more mafic towards the stock's margin to more felsic in the interior. The northern body is strongly foliated at its margin, but unfoliated in its interior. The southern body contains two units, the granodiorite-monzonite porphyry (termed Subgroup I based on chemical composition) and the granodiorite (termed Subgroup II based on chemical composition), which are physically and chemically distinct. Typical rock compositions of this body range from quartz-monzodiorite to granodiorite and foliation is only rarely observed. Compositional trends in the northern body show smoothly decreasing Fe (sub 2) O (sub 3) (super t) , MgO, CaO, TiO (sub 2) , P (sub 2) O (sub 5) and MnO with increasing SiO (sub 2) , and smoothly increasing Na (sub 2) O, K (sub 2) O and BaO with increasing SiO (sub 2) . Trends in the southern body are similar but with inflections in the slope of Fe (sub 2) O (sub 3) (super t) , MgO, TiO (sub 2) , and P (sub 2) O (sub 5) vs. SiO (sub 2) . At about 60 wt.% SiO (sub 2) , the Na (sub 2) O vs. SiO (sub 2) trend for the southern body splits into two separate increasing trends with different slopes. The increasing K (sub 2) O vs. SiO (sub 2) trend splits into two trends as well, one increasing parallel to that observed for the northern body, the other decreasing. In the northern body Rb increases with increasing SiO (sub 2) , but in the southern body two separate decreasing trends are apparent. Comparatively, the northern body and subgroup II of the southern bo ACCESSION NUMBER: 1998-009065 AUTHORS: Chualaowanich, Tawatchai COLLECTION AUTHORS: 02C Geochemistry of rocks, soils, and sediments; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: Chaffee County Colorado; Colorado; Cretaceous; diorites; emplacement; evolution; Fremont County Colorado; genesis; geochemistry; granites; granodiorites; I-type granites; igneous rocks; intrusions; mafic composition; magmas; Mesozoic; monzonites; Mosquito Range; North America; Park County Colorado; petrography; plutonic rocks; Rocky Mountains; stocks; U. S. Rocky Mountains; United States; Upper Cretaceous; Whitehorn Stock; zoning LANGUAGE: English PUBLICATION YEAR: 1996 UPDATE CODE: 199804 ---------------------------------------------------------------------------------------------------------- (Reference 322) GEOREF: 2004-026598 CODEN: GSAPAZ LATITUDE LONGITUDE: LAT: N323000; N333000; LONG: W1161000; W1174000.LAT: N321500; N330000;LONG: W1161500; W1163000. ABSTRACT: The Peninsular Ranges batholith of southern California and Baja California, Mexico, is well recognized as a prime example of an I-type Cretaceous batholith. Often overlooked, however, is a volumetrically significant amount of pre-Cretaceous gneissic granite in the axial zone of the batholith. New U-Pb zircon age data confirm that the metaluminous and peraluminous plutonic bodies were emplaced during the middle Jurassic. Also reported in this paper is a Jurassic U-Pb age for a metaluminous (I-type) tonalite-quartz diorite pluton that is spatially related to the peraluminous suites. This result suggests that other unrecognized Jurassic I-type plutons may also be present in the batholith. Within San Diego County, Todd and Shaw (1985) recognized and mapped two suites

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of strongly deformed gneissic granites and migmatites. One is peraluminous (Harper Creek suite) while the other is transitional between metaluminous and peraluminous (Cuyamaca Reservoir suite). These rocks bear a striking resemblance to deformed and, in places, migmatitic, peraluminous (S-type) examples from the Lachlan fold belt and New England batholith of eastern Australia. The gneissic granite suites are known to extend north along the axial zone of the Peninsular Ranges batholith and cover an area at least 45 km wide by 150 km long. To the south, rocks of similar type are known to extend into Baja California, Mexico, for at least 300 km. Chemical and isotopic studies of these Jurassic suites confirm that they meet the criteria necessary to define them as S-type and transitional I- to S-type, respectively. However, unlike the majority of Lachlan fold belt S-type granites that are high level and often associated with their volcanic equivalents, the Peninsular Ranges batholith suites were emplaced at much deeper levels, possibly as much as 11-16 km. The Harper Creek suite, of S-type gneissic granodiorite-tonalite plutons and associated Stephenson Peak migmatitic schist and gneiss facies, is strongly peraluminous and contains biotite, cordierite, sillimanite, abundant graphite, and ilmenite. It has elevated delta (super 18) O up to +20 per mil, initial (super 87) Sr/ (super 86) Sr ratios (Sr (sub i) ) to 0.713, a high aluminum saturation index, and Na (sub 2) O/K (sub 2) O ratios that overlap those of the Lachlan fold belt S-type granites. The Cuyamaca Reservoir suite contains gneissic granodiorite-tonalite plutons, transitional between metaluminous and moderately peraluminous (I-to S-type), containing reduced biotite, subaluminous amphibole, orthopyroxene, titanite and ilmenite. It has values of delta (super 18) O and Sr (sub i) greater than the Cretaceous I-type granites but less than the Harper Creek suite. Leucosome melt phase accumulation from the Julian Schist diatexites to produce a restite-rich magma is considered the most likely origin for the Harper Creek suite. For the Cuyamaca Reservoir suite, possible source components include young mantle-derived magma, metaigneous and metasedimentary rocks formed in an arc environment, and evolved basinal fill metasedimentary rocks. The evolved metasedimentary component may be of Julian type. The Harper Creek and Cuyamaca Reservoir suites comprise deformed, steepwalled, north-northwest-trending bodies up to 20 km long and with length-to-width ratios of 4:1. Textures range from strongly foliated to gneissic or mylonitic. Internal foliation that strikes parallel to the long dimension of the bodies and dips steeply to the east is defined by alignment of relict magmatic feldspar and quartz grains and recrystallized aggregates of quartz and biotite. The concordance of magmatic and subsolidus foliations in the Jurassic plutons and the continuity of these structures with regionally developed metamorphic fabrics in their wallrocks indicate that magmatic foliation was overprinted by high-temperature, post-magmatic solid-state foliation. Foliation in the Harper Creek and Cuyamaca Reservoir suites is concordant with the axial pla AUTHOR AFFILIATION: Macquarie University, GEMOC, Sydney, N.S.W., Australia ACCESSION NUMBER: 2004-026598 AUTHORS: Shaw-S-E; Todd-Victoria-R; Grove-Marty BOOK AUTHORS: Johnson-Scott-E (editor); Paterson-Scott-R (editor); Fletcher-John-M (editor); Girty-Gary-H (editor); Kimbrough-David-L (editor); Martin-Barajas-Arturo (editor) BOOK TITLE: In: Tectonic evolution of northwestern Mexico and the Southwestern USA. BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology; 02C-Geochemistry-of-rocks,-soils,-and-sediments COUNTRY OF PUBLICATION: United-States DESCRIPTORS: absolute-age; alkali-metals; alkaline-earth-metals; Australasia-; Australia-; Baja-California; batholiths-; California-; chemical-composition; chemical-ratios; Cuyamaca-Reservoir-Suite; dates-; deformation-; diorites-;

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folds-; fractures-; geochemistry-; gneisses-; granites-; Harper-Creek-Suite; I-type-granites; ICP-mass-spectra; igneous-rocks; intrusions-; island-arcs; isotope-ratios; isotopes-; Jurassic-; Lachlan-fold-belt; magmas-; major-elements; mass-spectra; Mesozoic-; metals-; metaluminous-composition; metamorphic-rocks; Mexico-; mineral-assemblages; mineral-composition; nesosilicates-; North-America; O-18-O-16; orthosilicates-; oxygen-; Peninsular-Ranges; Peninsular-Ranges-Batholith; peraluminous-composition; petrography-; petrology-; plate-tectonics; plutonic-rocks; radioactive-isotopes; Rb-87-Sr-86; restites-; rubidium-; S-type-granites; San-Diego-County-California; sedimentary-rocks; silicates-; spectra-; stable-isotopes; stratigraphic-units; strontium-; tectonics-; trace-elements; U-Pb; United-States; volcanic-rocks; whole-rock; zircon- DOCUMENT TYPE: Serial ISBN: 0-8137-2374-4 ILLUSTRATION: Refs: 106; illus. incl. 5 tables, geol. sketch maps. ISSN: 0072-1077 LANGUAGE: English PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 2003. PUBLICATION YEAR: 2003 REFERENCE SOURCE: GeoRef, Copyright 2004, American Geological Institute. SOURCE: Special Paper - Geological Society of America. 374; Pages 157-183. 2003. TITLE: Jurassic peraluminous gneissic granites in the axial zone of the Peninsular Ranges, Southern California. UPDATE CODE: 200408 ---------------------------------------------------------------------------------------------------------- (Reference 323) GEOREF: 2004-026599 CODEN: GSAPAZ LATITUDE LONGITUDE: LAT: N323000; N333000; LONG: W1161000; W1174000. LAT: N323500; N332500; LONG: W1142500; W1161000. AUTHOR AFFILIATION: Palomar College, Earth Sciences Department, San Marcos, CA, United States ACCESSION NUMBER: 2004-026599 AUTHORS: Todd-Victoria-R; Shaw-Stirling-E; Hammarstrom-Jane-M BOOK AUTHORS: Johnson-Scott-E (editor); Paterson-Scott-R (editor); Fletcher-John-M (editor); Girty-Gary-H (editor); Kimbrough-David-L (editor); Martin-Barajas-Arturo (editor) BOOK TITLE: In: Tectonic evolution of northwestern Mexico and the Southwestern USA. BIB LEVEL: Analytic CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: alkali-metals; alkaline-earth-metals; Baja-California; batholiths-; California-; chemical-composition; chemical-ratios; complexes-; continental-margin; Cretaceous-; deformation-; facies-; faults-; gabbros-; geochemistry-; geologic-barometry; granites-; gravity-anomalies; igneous-rocks; Imperial-County-California; intrusions-; isotope-ratios; isotopes-; Jurassic-; magmas-; magnetic-anomalies; major-elements; mantle-; melting-; Mesozoic-; metals-; Mexico-; mineral-composition; movement-; nomenclature-; North-America; O-18-O-16; oxygen-; paleogeography-; Peninsular-Ranges; Peninsular-Ranges-Batholith; petrography-; petrology-; plate-tectonics; plutonic-rocks; plutons-; properties-

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; provenance-; radioactive-isotopes; Rb-87-Sr-86; rifting-; rubidium-; San-Diego-County-California; stable-isotopes; strike-slip-faults; strontium-; tectonics-; textures-; trace-elements; transform-faults; United-States; uplifts-; Upper-Jurassic DOCUMENT TYPE: Serial ISBN: 0-8137-2374-4 ILLUSTRATION: Refs: 114; illus. incl. 3 plates, 6 tables, geol. sketch maps. ISSN: 0072-1077 LANGUAGE: English PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 2003. PUBLICATION YEAR: 2003 REFERENCE SOURCE: GeoRef, Copyright 2004, American Geological Institute. RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors) SOURCE: Special Paper - Geological Society of America. 374; Pages 185-235. 2003. TITLE: Cretaceous plutons of the Peninsular Ranges Batholith, San Diego and westernmost Imperial counties, California; intrusion across a Late Jurassic continental margin. UPDATE CODE: 200408 ---------------------------------------------------------------------------------------------------------- (Reference 324) GEOREF: 1991-077376 COLLECTION AUTHORS: 23 Geomorphology; 16 Structural geology COPYRIGHT: GeoRef, Copyright 2006, American Geological Institute. MAP TYPE: Type: geologic maps ; tectonic maps MONOGRAPH TITLE: Structure and emplacement of the Sage Hen Flat Plateau, WhiteMountains, California ORGANIZATION: University of California at Los Angeles, Los Angeles, CA, UnitedStates (USA) PUBLICATION TYPE: Thesis or dissertation; Map; Master's; Monographic ACCESSION NUMBER: 1991-077376 AUTHORS: Bilodeau, Bruce Joseph COLLECTION AUTHORS: 23 Geomorphology; 16 Structural geology COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: areal geology; California; emplacement; geologic maps; geomorphology;landform description; maps; plateaus; Sage Hen Flat Plateau;structural geology; tectonic maps; tectonics; United States; WhiteMountains LANGUAGE: English MAP TYPE: Type: geologic maps ; tectonic maps PUBLICATION YEAR: 1981 UPDATE CODE: 1991 ---------------------------------------------------------------------------------------------------------- (Reference 325) GEOREF: 2001-028093 ACCESSION NUMBER: 2001-028093 AVAILABILITY: University Microfilms, Ann Arbor, MI, United States

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BOOK AUTHORS: Lee-Sang-yun BOOK TITLE: Geology and petrology of Cretaceous and Tertiary granitic rocks, Lamoille Canyon, Ruby Mountains, Nevada. BIB LEVEL: Monograph CATEGORY CODES: 02D-Isotope-geochemistry; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-States DESCRIPTORS: A-type-granites; Cenozoic-; chemical-composition; Cretaceous-; crust-; dehydration-; gneisses-; granite-gneiss; granites-; igneous-rocks; intrusions-; isotopes-; Lamoille-Canyon; melting-; Mesozoic-; metamorphic-core-complexes; metamorphic-rocks; min DEGREE GRANTED: Doctoral DEGREE GRANTING INSTITUTION: Texas Tech University. Lubbock, TX, United States. Pages: 272. 1999. DOCUMENT TYPE: Thesis-or-Dissertation LANGUAGE: English PUBLICATION YEAR: 1999 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. UPDATE CODE: 200109 ---------------------------------------------------------------------------------------------------------- (Reference 326) GEOREF: 1998-039203 LATITUDE LONGITUDE: LAT: N384000; N401000; LONG: W1140500; W1155500. AUTHOR AFFILIATION: University of the South, Department of Forestry and Geology, Sewanee, TN, United States ACCESSION NUMBER: 1998-039203 AUTHORS: Shaver-Stephen-A; Jeanne-Richard-A BOOK AUTHORS: Coyner-Alan-R (editor); Fahey-Patrick-L (editor) BOOK TITLE: In: Geology and ore deposits of the American Cordillera; symposium proceedings. BIB LEVEL: Analytic CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits CONFERENCE INFORMATION: Geology and ore deposits of the American Cordillera. Reno, NV, United States. Apr. 10-13, 1995. COUNTRY OF PUBLICATION: United-States DESCRIPTORS: Aultman-Deposit; carbonate-rocks; Carboniferous-; Chainman-Shale; clastic-rocks; copper-ores; Devonian-; Ely-Nevada; gold-ores; granites-; Guilmette-Formation; hydrothermal-alteration; igneous-rocks; Los-Angeles-Deposit; metal-ores; metasomatism-; mineral-deposits,-genesis; Mississippian-; Nevada-; P-T-conditions; Paleozoic-; plutonic-rocks; porphyry-copper; quartz-monzonite; Rob-Roy-Deposit; Robinson-mining-district; sedimentary-rocks; Smokey-Stock; United-States; White-Pine-County-Nevada DOCUMENT TYPE: Book; Conference-Document ISBN: 1-889824-00-3 ILLUSTRATION: Refs: 54; illus. incl. sects., geol. sketch maps. LANGUAGE: English PUBLISHER: Geological Society of Nevada. Reno, NV, United States. 1995. PUBLICATION YEAR: 1995 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Pages 1623-1637. 1995. TITLE: The geology and evolution of the weakly Au-(Cu)-mineralized far eastern side of the Robinson mining district, Ely, Nevada. UPDATE CODE: 199816

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---------------------------------------------------------------------------------------------------------- (Reference 327) GEOREF: 1978-022672 CODEN: NVMRAT COLLECTION AUTHORS: 12, Stratigraphy COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: illus. incl. tables, strat. col. LATITUDE LONGITUDE: Latitude:N380000,N400000 Longitude:W1180000,W1200000 MONOGRAPH TITLE: Stratigraphy of the Tertiary ash-flow tuffs in the Yerington District, Nevada PUBLICATION TYPE: Serial; Monographic AUTHORS: Proffett, J M, Jr; Proffett, B H COLLECTION AUTHORS: 12, Stratigraphy COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; alkali feldspar; andesites; ash flows; biotite; Bluestone Mine Tuff; breccia; Cenozoic; chemical composition; Churchill County Nevada; clastic rocks; dacites; dates; devitrification; Douglas County Nevada; extent; feldspar group; framework silicates; Guild Mine Member; igneous rocks; K/Ar; Lyon County Nevada; mica group; Mickey Pass Formation; Mineral County Nevada; Miocene; Neogene; Nevada; Oligocene; Paleogene; plagioclase; pyroclastics; sanidine; sedimentary rocks; sheet silicates; silicates; Singatse Tuff; Storey County Nevada; stratigraphy; Tertiary; thickness; tuff; United States; volcanic rocks; volume; Washoe County Nevada; Weed Heights Member; welding; west-central; Yerington District; zoning ISSN: 0470-8202 LANGUAGE: English PUBLISHER: Nevada Bureau of Mines and Geology, Reno, NV, United States USA PUBLICATION YEAR: 1976 SOURCE: Report - Nevada, Bureau of Mines, no.27, 28 pp., 1976 UPDATE CODE: 1978 ---------------------------------------------------------------------------------------------------------- (Reference 328) GEOREF: 2002-006369 CODEN: CMPEAP COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FEATURES: References: 79; illus. incl. 3 tables, geol. sketch map PUBLICATION TYPE: Serial; Analytic AUTHOR AFFILIATION: Illinois State University, United States USA ACCESSION NUMBER: 2002-006369 AUTHORS: King, Elizabeth M; Valley, John W COLLECTION AUTHORS: 05A, Igneous and metamorphic petrology COUNTRY OF PUBLICATION: International III DESCRIPTORS: alteration; batholiths; Bitterroot Range; Cenozoic; central Idaho;chemical composition; Cretaceous; Idaho Batholith; intrusions; isotoperatios; isotopes; lower Tertiary; magma contamination; magmas;Mesozoic; North America; O-18/O-16; oxygen; provenance; RockyMountains; stable isotopes;

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Tertiary; U. S. Rocky Mountains; UnitedStates; western Montana ISSN: 0010-7999 LANGUAGE: English PUBLICATION YEAR: 2001 SOURCE: Contributions to Mineralogy and Petrology, vol.142, no.1, pp.72-88,Oct 2001 TITLE: The source, magmatic contamination, and alteration of the IdahoBatholith UPDATE CODE: 2002 ---------------------------------------------------------------------------------------------------------- (Reference 329) GEOREF: 1987-057363 COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. MONOGRAPH TITLE: Tertiary epizonal plutonic rocks of the Selway-Bitterroot Wilderness,Idaho County, Idaho ORGANIZATION: University of Idaho, Moscow, ID, United States USA PAGES DATE: 467 pp. PUBLICATION TYPE: Thesis or dissertation; Doctoral; Monographic ACCESSION NUMBER: 1987-057363 AUTHORS: Motzer, William Erhardt AVAILABILITY: University Microfilms, Ann Arbor, MI, United States USA COLLECTION AUTHORS: 03 Geochronology; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; Bad Luck Pluton; Cenozoic; chemical composition; dates;dikes; emplacement; extension; faults; fractures; geochronology;granites; Idaho; Idaho Batholith; Idaho County Idaho; igneous rocks;indicators; intrusions; joints; K/Ar; north-central Idaho; PaintedRocks Pluton; Paleogene; petrology; plutonic rocks; plutons; RockCreek Lake Stock; Running Creek Pluton; Selway-Bitterroot Wilderness;syenites; Tertiary; United States; Whistling Pig Pluton LANGUAGE: English PUBLICATION YEAR: 1985 UPDATE CODE: 1987 ---------------------------------------------------------------------------------------------------------- (Reference 330) GEOREF: 2001-900009 (unpublished Georef; Navdat only) MONOGRAPH TITLE: Volcanic geology of the Porphyry Peak area, southeastern Challis Volcanic Field, central Idaho ORGANIZATION: Idaho State University, Pocatello, ID, United States USA PAGES DATE: 92 pp. PUBLICATION TYPE: Thesis or dissertation; Masters; Monographic ACCESSION NUMBER: 2001-900009 AUTHORS: Blakley, John D. COUNTRY OF PUBLICATION: United States USA LANGUAGE: English PUBLICATION YEAR: 2001 UPDATE CODE: 2001

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---------------------------------------------------------------------------------------------------------- (Reference 331) GEOREF: 1984-048450 CODEN: XGPPA9 COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COPYRIGHT: GeoRef, Copyright 2004, American Geological Institute. FORMAT COVERED: Scale: 1:48,000. Type: colored geologic map FEATURES: References: 42; illus. incl. 273 anal., 19 tables, sketch map LATITUDE LONGITUDE: Latitude:N395230,N400730 Longitude:W1051730,W1053730 MONOGRAPH TITLE: Geologic setting and petrochemistry of the Late Cretaceous-early Tertiary intrusives in the northern Front Range mineral belt, Colorado PUBLICATION TYPE: Serial; Report; Map; Monographic SPONSOR: USGS, Publications of the U. S. Geological Survey ABSTRACT: The geologic setting of the intrusive rocks between lat 39 degrees 52'30 and 40 degrees 07'30 N that are 70 m.y. old to 44 m.y. is collectively described. Whole-rock chemistry and semiquantative spectrographic analyses for each of the major intrusives and associated dikes are presented, and chemical relations and trends within the individual stocks, between stocks, and between stocks and associated dikes are shown graphically. Chemical trends for the stocks, especially the more mafic Caribou and Audubon-Albion stocks, indicate a common origin. The Caribou is the more mafic stock; the Audubon-Albion has the greatest chemical variation of all the stocks. AUTHOR AFFILIATION: U. S. Geol. Surv., USA, (United States) ACCESSION NUMBER: 1984-048450 AUTHORS: Gable, Dolores J COLLECTION AUTHORS: 05A Igneous and metamorphic petrology; 02C Geochemistry of rocks, soils, and sediments COUNTRY OF PUBLICATION: United States (USA) DESCRIPTORS: Boulder County Colorado; Cenozoic; chemical composition; Colorado; Cretaceous; data; dikes; emplacement; Front Range; genesis; geochemical methods; geochemistry; geologic maps; Gilpin County Colorado; granites; granodiorites; graphic methods; igneous rocks; intrusions; intrusive rocks; Jefferson County Colorado; maps; Mesozoic; mineral exploration; monzonites; Paleogene; petrology; plutonic rocks; quantitative analysis; stocks; syenites; Tertiary; trace elements; United States; Upper Cretaceous; USGS; whole rock ISSN: 1044-9612 LANGUAGE: English PUBLICATION YEAR: 1984 RESEARCH PROGRAM: P 1280 SOURCE: U. S. Geological Survey Professional Paper, Report: P 1280, 33 pp., 1984 UPDATE CODE: 1984 ---------------------------------------------------------------------------------------------------------- (Reference 332) GEOREF: 1988-036705 CODEN: JPTGAD AUTHOR AFFILIATION: Brown Univ., Dep. Geol. Sci., Providence, RI, United States

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ACCESSION NUMBER: 1988-036705 AUTHORS: Gromet-L-Peter; Silver-Leon-T BIB LEVEL: Analytic CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 05A-Igneous-and-metamorphic-petrology COUNTRY OF PUBLICATION: United-Kingdom DESCRIPTORS: accessory-minerals; alkaline-earth-metals; assimilation-; basalts-; batholiths-; California-; Cretaceous-; differentiation-; diorites-; emplacement-; fractional-crystallization; geochemistry-; granites-; granodiorites-; igneous-rocks; intrusions-; isotopes-; magmas-; melting-; Mesozoic-; metals-; mineral-composition; North-America; O-18-O-16; oxygen-; partial-melting; Peninsular-Ranges-Batholith; plutonic-rocks; rare-earths; ratios-; Sr-87-Sr-86; stable-isotopes; strontium-; tonalite-; United-States; volcanic-rocks DOCUMENT TYPE: Serial ILLUSTRATION: Refs: 150; illus. ISSN: 0022-3530 LANGUAGE: English ANNOTATION: Calif. Inst. Technol., Div. Geol. and Planet. Sci., Contrib. No. 4349. PUBLISHER: Clarendon Press. Oxford, United Kingdom. 1987. PUBLICATION YEAR: 1987 REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. SOURCE: Journal of Petrology. 28; 1, Pages 75-125. 1987. TITLE: REE variations across the Peninsular Ranges Batholith; implications for batholithic petrogenesis and crustal growth in magmatic arcs. UPDATE CODE: 1988 ---------------------------------------------------------------------------------------------------------- (Reference 333) GEOREF: 2001-076422 CODEN: BUGMAF COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COPYRIGHT: GeoRef, Copyright 2002, American Geological Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States. FEATURES: References: 48; illus. Incl. 2 tables, geol. sketch maps PUBLICATION TYPE: Serial; Analytic ABSTRACT: The intrusive suite of Yosemite Valley provides an excellent example of coeval mafic and felsic magmatism in a continental-margin arc. Within the suite, hornblende gabbros and diorites associated with the Cretaceous El Capitan and Taft Granites occur as scattered mafic enclaves, enclave swarms, small pods, synplutonic dikes, and a 2 km super 2 mafic complex known as the diorite of the Rockslides. Field evidence suggests that most of the mafic rocks are temporally related to the El Capitan Granite and that significantly less mafic magma accompanied the slightly later intrusion of the Taft Granite. Concordant zircon fractions from the diorite of the Rockslides yield an age of 103 + or - 0.15 Ma, which is the same age as the El Capitan Granite. Initial isotopic compositions of the mafic and felsic rocks are similar; the mafic rocks exhibit only slightly higher super 87 Sr/ super 86 Sr, lower super 143 Nd/ super 144 Nd, and higher super 206 Pb/ super 204 Pb ratios than the granites. Because the mafic magmas are only slightly more isotopically evolved than the granites, geochemical variation within the granites is not easily explained in terms of contamination

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of a depleted-mantle component by partial melts of ancient, high-silica continental crust. Rather, these data are consistent with an interpretation that the El Capitan Granite was derived by partial melting of relatively young mafic sources broadly similar to the mafic rocks of the suite. AUTHOR AFFILIATION: University of North Carolina, Department of Geological Sciences, Chapel Hill, NC, United States USA ACCESSION NUMBER: 2001-076422 AUTHORS: Ratajeski, Kent; Glazner, Allen F; Miller, Brent V COLLECTION AUTHORS: 02D Isotope geochemistry; 05A Igneous and metamorphic petrology COUNTRY OF PUBLICATION: United States USA DESCRIPTORS: absolute age; alkaline earth metals; batholiths; California; Cretaceous; dates; El Capitan Granite; experimental studies; felsic composition; geochemistry; granites; ICP mass spectra; igneous rocks; inclusions; intrusions; isotope ratios; isotopes; lead; mafic composition; mafic magmas; magmas; major elements; Mariposa County California; mass spectra; Mesozoic; metals; Nd-144 /Nd-143; neodymium; nesosilicates; neutron activation analysis data; orthosilicates; outcrops; partial melting; Pb-206/Pb-204; plutonic rocks; radioactive isotopes; rare earths; Sierra Nevada Batholith; silicates; spectra; Sr-87/Sr-86; stable isotopes; strontium; Taft Granite; trace elements; Tuolumne County California; U/Pb; United States; whole rock; Yosemite National Park; Yosemite Valley; zircon ISSN: 0016-7606 LANGUAGE: English PUBLICATION YEAR: 2001 SOURCE: Geological Society of America Bulletin, vol. 113, no.11, pp.1486-1502, Nov 2001 TITLE: Geology and geochemistry of mafic to felsic plutonic rocks in the Cretaceous intrusive suite of Yosemite Valley, California. UPDATE CODE: 200124 ----------------------------------------------------------------------------------------------------------

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