BEAVERLODGE DOMAIN Murmac Bay group BMq Quartzite: gray and yellow; medium to coarse grained; layered; in part arkosic; local silicate

facies iron formation contains 50-80% garnet (1-10 cm); < 5% salt and pepper-textured amphibolite layers 20-40 cm thick.

BMp Psammopelite and psammite: Psammopelites: 1) brown to dark grey; fine- to medium-grained;

layered to finely laminated; 20% biotite on average; > 40% quartz, arkosic layers up to 20 cm thick common; MS1=0.2; 2) rusty-weathering, medium- to coarse-grained, layered; 2-40% garnet, 5-25% biotite, trace to 3% graphite, minor pyrite; 3) rare stromatic metatexites, well-developed biotite-sillimanite-garnet-rich melanosome, light grey quartzofeldspathic leucosome; rare, coarse- to very coarse-grained, diopside-bearing calc-silicate rock layers < 1 m thick occur in psammopelitic rocks. Psammites: 1) minor quartzite and 2) light grey, medium- to coarse-grained, massive to weakly foliated; arkosic, 15-25% feldspar, 70-85% quartz; CI2 0-5; MS=0.4; 2.5% eK, 1.7 ppm eU, 16.5 ppm eTh, eU/eTh 0.08-0.163.

BMm Amphibolite: salt and pepper; medium to coarse grained; commonly layered, moderately to

strongly foliated; hornblende predominant mafic mineral, green clinopyroxene locally abundant, 0-10% garnet, 0-15% quartz; CI 30-80; MS=1.3; < 1% eK, eU 0.4 ppm, eTh 2.3 ppm, eU/eTh 0.2-2.4.

BMg Garnet diatexite and granitic gneiss: creamy-grey garnet diatexite and pink to red granitic

gneiss; medium to coarse grained; 1-7% 3 mm garnet (average 4%) in diatexite (rare in granitic gneiss); < 5% biotite; 25-30% quartz; Diatexite: MS 0.08; 4.4% eK, 4 ppm eU, 62 ppm eTh, eU/eTh 0.04-0.15. Granitic gneiss: MS=0.14; 18 ppm eU, 111 ppm eTh, eU/eTh 0.05-0.27.

Units of unknown age Blg Leucocratic quartzofeldspathic gneiss: creamy-grey; medium grained; semi-massive to

foliated; 20-70% quartz; 1-3% pink, equidimensional 0.5 mm garnet; trace fine-grained biotite and rutile; MS=0.02-2; 2.2-4.5% eK, 1.3-12 ppm eU, 4-32 ppm eTh, eU/eTh 0.04-0.83.

Bgd Granodioritic gneiss: creamy-grey; medium grained; strongly foliated, poorly layered; 15 to 20%

biotite; MS=0.08; 2% eK, 3 ppm eU, 33 ppm eTh, eU/eTh 0.04-0.18. Bbh Biotite-hornblende-quartzofeldspathic gneiss: yellowish, greenish, beige, light brown; medium

to coarse grained; moderately to strongly foliated; homogeneous to moderately layered; layering defined by variable proportions of laminar or streaky mafic mineral aggregates; 10-40%quartz, average 15%; 5-25% biotite + hornblende, average 15%; minor to trace garnet; minor to trace ilmenite and monazite except at the “Archie Lake REE showing” (SMDI 1552); MS=0.3; ~ 2% eK, < 3 ppm eU, < 30 ppm eTh, eU/eTh 0.02- 0.6.

Bbhg Pink granitic gneiss: pink granitic gneiss and foliation-parallel pink leucogranite sheets

exceed 20% and occasionally reach 50% mixed with unit Bbh; MS=2; 7 ppm eU, 50 ppm eTh.

Bgu Pink leucogranite: pink; coarse grained; massive; biotite, magnetite; CI=3; MS=8. Archean Granites BG Stephens Lake granite: dark greenish brown to red; fine to very fine grained; mylonitic; locally

layered; 3-5% creamy-white feldspar porphyroclasts (2 cm) common; locally overprinted by strong pyrite ± chlorite alteration.

Location Map

74P11

74P05 74P06

74P1274O11

74O05 74O06 74O07 74O08

74O12 74O10 74O09 74P10

74P07

74P1474P1374O1674O1574O1474O13 74P15

74N09

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107°45'0"W

Although the Ministry of Energy and Resources has exercised all reasonable care in the compilation, interpretation, and production of this item, it is not possible to ensure total accuracy, and all persons that rely on the information contained herein do so at their own risk. The Ministry of Energy and Resources and the Government of Saskatchewan do not accept liability for any errors, omissions or inaccuracies that may be included in or derived from, this item.

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Lake Athabasca

Catalogue Number 2011-4.2-(6)

1

23

4

1. Forget Lake

RA2011-01

(values recorded from a hand-held RS-230 spectrometer)Radioactive Anomalies

0 0.5 1 1.5 20.25Kilometres

0 0.25 0.5 0.75 10.125Miles

TRAIN DOMAIN

TLp Garnet-biotite-psammopelitic gneiss: fine to coarse grained; dm scale layering to schistose; 40-75% quartz; 10-30% biotite; trace to 50% garnet (0.5-1 mm); weathers medium to dark grey to rusty where garnet is abundant. MS=0.12-0.75; 2.6% eK, 3 ppm eU, 11 ppm eTh.

TLm Amphibolite: salt and pepper; medium grained; homogeneous, layered, lineated; 15-70%

plagioclase, 30-85% hornblende (± garnet, biotite); layers < 1 m thick in unit TLp and inclusions in unit TLst; thinner layers almost totally converted to very coarse-grained biotite in unit TLp; up to 20% 5 mm garnet porphyroblasts rimmed by plagioclase present in amphibolite inclusions; magnetite locally abundant.

TLit Inclusion-rich tonalite/granodiorite migmatite: light grey; medium to coarse grained; strongly

foliated; tonalitic to granodioritic neosome containing abundant amphibolitic inclusions up to 1 m in diameter; variable proportions of light grey-pink, medium-grained, injected granitic leucosome cross-cuts the neosome and the amphibolite.

TLt Tonalitic gneiss: light to medium grey; medium to coarse grained; strongly foliated and layered;

2-7% hornblende in light grey leucosome; 15-50% hornblende in salt and pepper melanosome. TLgd Granodioritic and granitic gneiss: mixed unit of 1) Granodioritic gneiss: medium to dark grey;

medium-grained; strongly foliated, layered; 10-20% biotite, 15-30% quartz; MS 5.6; 2% eK, 2 ppm eU, 10 ppm eTh; and 2) Granitic gneiss: grey-pink to pink; medium to coarse grained; finely layered to stromatic; 15-25% biotite, 20-25% quartz; MS=1.3; 3.7% eK, 4 ppm eU, 40 ppm eTh.

TANTATO DOMAIN Tt Tonalitic gneiss: mixed banded gneisses and dark-grey ribboned mylonites; banded gneiss

consists of variably thick and irregularly alternating moderalely foliated to mylonitic felsic layers and mylonitic mafic layers containing equal proportions of mafic minerals and plagioclase; late, massive, foliation-parallel mafic dykes are common; MS=3; 1.4% eK, 0.7 ppm eU, 3.9 ppm eTh.

Tx Mylonite: red, grey, black; fine to very fine grained, mylonitic to ultramylonitic; variable MS similar

to unit Ttg; 13.1 ppm eTh. MUDJATIK DOMAIN Mm Amphibolite: salt and pepper; generally medium to coarse grained; massive to strongly foliated;

locally mylonitic; 40-85% hornblende, 15-60% plagioclase; MS=0.8. Mgdt Granodioritic/tonalitic gneiss: grey-pink, locally salt and pepper; fine to coarse grained; weakly

to strongly foliated, moderately to strongly layered; 7-30% ferromagnesian minerals, locally either hornblende dominant or biotite and traces of garnet dominant; ~ 25% quartz; common boudinaged amphibolite layers up to 15 centimetres thick; locally up to 25% of injected pink granitic layers.

Mmt Hornblende biotite gneiss: light grey to grey-brown; fine to medium grained; layered; cm-thick

alternating layers containing 20-25% biotite + hornblende with layers containing 15-20% hornblende; locally mixed with dark grey fine-grained slaty gneiss containing ~ 0.5 to 1% foliation-parallel cm-thick quartz-feldspar veins and trace pyrite; MS ~ 1; 0.9 ppm eU and 3.2 ppm eTh.

Mv Mixed volcanic rocks: interlayered mafic to felsic rock with minor ultramafic rock; commonly

layered with patchy epidote alteration; locally massive; layered rocks display variations from medium grey, medium grained and intermediate composition to black, medium to fine grained and mafic composition.

Scale 1:20 000

Symbols

Bedrock Geology of the Forget Lake, Archie Lake, Miller Lake, Bompas Lake and Upper Eva Lake Areas (Parts of NTS 74O09, 74O05, 74O10 and 74P10) at 1:20 000 scale

Preliminary Geological Map (2011) By C. Normand The area was mapped by Charles Normand, in the summer of 2011, with the assistance of Kyle Blazek and Mark

Matthews. This map was printed from the geologist’s digital file. Geological data were processed using Microsoft Access, and ArcView 10 software. Base maps were compiled from CanVec 1:50 000 scale digital cartographic maps produced by Natural Resources Canada. Grid coordinates are NAD83 CSRS98 UTM zone 13. The map was processed overall using ArcView 10 software. The map is issued in a package with the Summary of Investigations 2011 Volume 2, Saskatchewan Geological Survey, and is available separately from http://www.er.gov.sk.ca/soi. This map accompanies the following publication: Normand, C. (2011): Investigation of the REE Mineralization Potential in the Forget Lake and Archie Lake areas, Beaverlodge Domain; the Miller Lake area, Train Domain; and the Bompas Lake-Upper Eva Lake area, Tantato and Mudjatik Domains; in Summary of Investigations 2011 Volume 2, Saskatchewan Geological Survey, Sask. Ministry of Energy and Resources, Misc. Rep. 2011-4.2. This map may be referenced as: Normand, C. (2011): Bedrock Geology of the Forget Lake, Archie Lake, Miller Lake, Bompas Lake and Upper Eva Lake Areas (Parts of NTS 74O09, 74O05, 74O10 and 74P10); 1:20 000 scale prelim. maps; with Summary of Investigations 2011, Volume 2, Saskatchewan Geological Survey, Sask. Ministry of Energy and Resources, Misc. Rep. 2011-4.2.

3. Miller Lake

4. Bompas and Upper Eva Lakes2. Archie Lake

1. Forget Lake 2. Archie Lake 3. Miller Lake

4. Bompas and Upper Eva Lakes

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Easting NorthingTotal counts per second % eK2 ppm eU ppm eTh eU/eTh

RA2011-01 327289 6611989 11800 8.0 103.9 2236 0.05 Monazite327320 6611990 15500 14.5 154.1 2955 0.05

7825 5.1 65.4 1706 0.046400 4.7 42.7 1219 0.043000 4.0 20.9 491.9 0.04

RA2011-03 327083 6611842 6300 5.2 52.3 1202 0.04 MonaziteRA2011-04 325347 6615428 4650 7.5 18.5 833.1 0.02 MonaziteRA2011-05 326575 6612238 3400 4.2 172.2 92.8 1.86 n.d.

2950 3.6 21.6 451.3 0.052450 3.6 15.3 364.9 0.04

RA2011-07 327149 6612003 2200 2.4 15.4 338.1 0.05 n.d.322924 6615421 2100 5.3 84.3 94.5 0.89322882 6615315 2020 7.6 44.1 161 0.27322864 6615329 1940 6.2 41.6 166.6 0.25

19300 16.9 194.7 5558 0.0417600 13.5 155 4977 0.037050 3.4 35.6 1525 0.026750 2.9 42.9 1385 0.035400 3.2 29.3 1135 0.034420 2.2 22.9 815.4 0.033050 2.8 18.8 541.8 0.033030 1.8 10.4 544 0.022580 2.2 15.4 462.7 0.032150 2.2 13.3 390.2 0.0312850 7.2 91.4 3149 0.033150 2 13.9 597.5 0.02

RA2011-11 344800 6596282 10900 6.1 67.5 2120 0.03 MonaziteRA2011-12 344565 6597611 2170 2.9 9.9 373.2 0.03 Monazite

14550 14.9 860.7 152.7 5.6413200 11.9 791 125.2 6.323475 4.1 180.4 45.2 3.99

RA2011-14 401376 6605515 11600 7.2 276 1337 0.21 n.d.8000 5.9 352.7 443.6 0.803700 3.6 172 155 1.112150 0.8 52.7 187.8 0.287000 6.9 376.4 97.6 3.862050 3.5 98 32.3 3.03

RA2011-17 398905 6604725 6050 6.6 354 101.9 3.47 n.d.RA2011-18 401616 6605973 5600 4.0 182 508 0.36 n.d.RA2011-19 402092 6606419 3450 2.9 105.9 327.4 0.32 n.d.RA2011-20 401295 6605628 2870 6.3 106.9 196.2 0.54 n.d.RA2011-21 398507 6604657 2100 2.2 108.4 36.9 2.94 n.d.RA2011-22 398382 6604948 2100 4.6 102.1 33.1 3.08 n.d.RA2011-23 400303 6604964 2000 4.3 11 320.2 0.03 Monazite 3

2950 3.9 134.2 125.7 1.07

2150 2.7 89.4 113.4 0.79

Area Radiometric anomaly #

Location1Identified REE-

bearing minerals

Forg

et L

ake

RA2011-08 n.d.

RA2011-02

RA2011-06 322495 6614559

327330 6612003 Monazite

n.d.

Spectrometry

505551

Monazite

RA2011-10 345107 6597588 Monazite

401460 6605632

RA2011-09 344980 6597762

6615020

Arc

hie

Lake

Mill

er L

ake

RA2011-24

n.d.

n.d.

n.d.

398598 6604880 n.d.

Bom

pas

Lake

- U

pper

Eva

Lak

e

RA2011-13

RA2011-16

RA2011-15

398526 6604803

1NAD83(CSRS98) UTM zone 13 2Elevated values are unreliable due to spectral interferences with U and Th 3Presence of phases in italics is presumed n.d.: not determined

������

�

²

Í0 Ü

RO

,Û

,

¨( (( (

¨¨( (

_

Mp Psammopelitic gneiss: light grey to dark grey-brown; fine to medium grained; strongly foliated, layered (1 cm to 1.5 m scale); 5-40% biotite, locally abundant retrograde muscovite; MS=0.4; 1.9 ppm eU, 5.4 ppm eTh.

Mg Granitic gneiss: two generations: 1) pink; medium to coarse grained; weakly to strongly foliated

defined by mm- to cm-thick biotite(± magnetite)-rich layers; 2) pink; coarse-grained; massive, homogeneous; unit contains 20-35% quartz and traces to 20% biotite; MS=0.02-38.1.

1Magnetic Susceptibility (10-3 SI units): 2CI – colour index 3Values measured using handheld RS 230 spectrometer

Mp

Mg

Swamp Contour interval (Forget/Archie 50 feet, Miller/Bompas 10 metre)

Reef

hø÷

Saint-L

ouis Fau

lt

Geological contact Airphoto lineament Fault observed Trace of axial planes: F3 S1 foliation (dip unknown, inclined, vertical) S2 foliation (inclined) S3 foliation (dip unknown, inclined, vertical) S4 foliation (dip unknown, inclined) Stretching lineation (second generation) Intersection lineation (second, third, unknown generation) Fracture (inclined) Vein; quartzite-hornblende (inclined)

Minor S fold (second and third generation) Minor Z fold (third generation) Minor symmetrical fold (second, third generation)

Fold axial plane; Inclined (second, third generation) Fold axial plane; Vertical (second,third generation) Dykes:

Granite (dip unknown, inclined) Creamy-grey granitic pegmatite (dip unknown, inclined) Pink granitic pegmatite (dip unknown) Lamprophyre (dip unknown, inclined) Mafic (diabase) (inclined)

Lamprophyre dyke Trench Radiometric anomaly with ID # (see table)

Glacial striae, grooves and chatter marks

Glacial drift