bedrock mapping and geological characterization in the ... · bedrock mapping and geological...
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Bedrock mapping and geological characterization in the northern Glennie
domain, west-central Reindeer Zone
Samantha Van De Kerckhove, Ryan Morelli and Dylan Deck Saskatchewan Geological Open House, 2017
Introduction
• 2017 bedrock mapping season in the northern Glennie Domain/Wapassini Sheet
• Last season of a project that started in 2014
Regional Geology, Reindeer zone
Correlation of Archaean and Palaeoproterozoic units between northeastern Canada and western Greenland: constraining the pre-collisional upper plate accretionary history of the Trans-Hudson orogen Marc R. St-Onge, Jeroen A. M. Van Gool, Adam A. Garde and David J. Scott Geological Society, London, Special Publications, 318, 193-235, 25 June 2009, https://doi.org/10.1144/SP318.7
• Trans Hudson Orogeny
• 2017 study area is within the Glennie Domain/Wapassini Sheet
• Overall project transects Kyaska Sheet and Wapassini Sheet
• Transects the Tabbernor Fault
(Corrigan et al. 2009)
Regional Geology, Reindeer zone
Correlation of Archaean and Palaeoproterozoic units between northeastern Canada and western Greenland: constraining the pre-collisional upper plate accretionary history of the Trans-Hudson orogen Marc R. St-Onge, Jeroen A. M. Van Gool, Adam A. Garde and David J. Scott Geological Society, London, Special Publications, 318, 193-235, 25 June 2009, https://doi.org/10.1144/SP318.7
• Trans Hudson Orogeny
• 2017 study area is within the Glennie Domain/Wapassini Sheet
• Overall project transects Kyaska Sheet and Wapassini Sheet
• Transects the Tabbernor Fault
modified by R. Maxeiner from Lewry et al., 1990
N
S
Bedrock mapping
• Supracrustal rocks are mostly mafic and intermediate volcanic rocks; minor sedimentary rocks and felsic volcanic
Bedrock mapping
• Main unit: felsic to intermediate pluton with slivers of supracrustal country rock
Bedrock mapping
• Minor late(r) intrusive rocks
Mafic volcanic rock
Intermediate volcanic rock
Bedrock mapping: Supracrustal and Associated Rocks
• Form rafts, xenoliths and/or slivers
• highly attenuated
• mostly mafic and intermediate volcanic rocks
Bedrock mapping: Supracrustal and Associated Rocks
• Form rafts, xenoliths and/or slivers
• highly attenuated
• mostly mafic and intermediate volcanic rocks
mafic xenoliths
Bedrock mapping: Supracrustal and Associated Rocks
• Minor sedimentary rocks and felsic volcanic
• Associated plutonic rocks - gabbro
Pelite
Bedrock mapping: Supracrustal and Associated Rocks
• Minor sedimentary rocks and felsic volcanic
• Associated plutonic rocks - gabbro
Migmatitic gabbro
Pelite
Bedrock mapping: Supracrustal and Associated Rocks
• Minor sedimentary rocks and felsic volcanic
• Associated plutonic rocks - gabbro
Migmatitic gabbro
Pelite
Felsic volcanic rock
Bedrock mapping: Orthogneisses
• Main unit: felsic to intermediate pluton
• Dioritic to granodioritic, minor tonalite, quartz diorite, and quartz monzodiorite
Gneissic diorite-granodiorite
Stromatic migmatite
Bedrock mapping: Orthogneisses
• Main unit: felsic to intermediate pluton
• Dioritic to granodioritic, minor tonalite, quartz diorite, and quartz monzodiorite
Homogeneous quartz diorite-diorite
Granitic veinlets
Bedrock mapping: Late intrusive rocks
• Pegmatite and aplite dikes
Bedrock mapping: Late intrusive rocks
• Pegmatite and aplite dikes
Pegmatite dikes
Graphic texture in pegmatite
Bedrock mapping: Late intrusive rocks
• Anatectic granitic intrusions
• Ultramafic rocks
Leucogranite
Bedrock mapping: Late intrusive rocks
• Anatectic granitic intrusions
• Ultramafic rocks
Diatexitic granite
Bedrock mapping: Late intrusive rocks
• Anatectic granitic intrusions
• Ultramafic rocks
Ultramafic intrusive rock
Metamorphism
• Upper amphibolite facies
• Partial melt
• No sillimanite or kyanite in the sediments
Net-textured migmatite
Garnet porphyroblasts in leucogabbro
A
B
Structure
• West varies relative to the east
• Deformation events: – D1 – S1
– D2 – S2/F2
– D3?
– D4?
Structure
• West varies relative to the east
• Deformation events: – D1 – S1
– D2 – S2/F2
– D3?
– D4?
Structure
Structure
Structure - west
Regional Structure
• Cross section - F3 and F4 – differ from regional?
- Transects anticlinorium hinge and Tabbernor Fault
A
B
Economic considerations
• Gold – Map area located ~30 km NE of Seabee Gold Mine
– not many quartz veins documented
• VMS-type – some gossanous sulphide rich outcrops
Economic considerations RMo17-13-002
• Gossanous and magnetic outcrop southwest of White Lake
• B.Sc. Thesis – Jared Squire
• Garnet, magnetite, hornblende and anthophyllite and/or cummingtonite mineralization
Economic considerations SV17-45-020 • Currently staked by Eagle Plains
Resources Ltd (100%) • In 2000, Leader Mining and Pine
Channel Gold Inc completed reconnaissance geological mapping and prospecting of the southeast shore of Redhill Lake (AF 63M15-0027). – Assays yielded elevated Zn , Co, Cu,
and Ni – Samples were taken from this
location
• SMDI #2745 located 1km+ NE
Economic considerations SV17-45-020 • Currently staked by Eagle Plains
Resources Ltd (100%) • In 2000, Leader Mining and Pine
Channel Gold Inc completed reconnaissance geological mapping and prospecting of the southeast shore of Redhill Lake (AF 63M15-0027). – Assays yielded elevated Zn , Co, Cu,
and Ni – Samples were taken from this
location
• SMDI #2745 located 1km+ NE
UTM E UTM N K
(%) U (ppm)
Th
(ppm) TCPS
SMDI #0400 608927 6205558 2.6 26.6 23.2 850
DD17-10-021 602106 6200082 3.8 166.6 128.4 3500
SV17-27-018 613052 6207600 5.7 111.4 171 2800
Economic considerations: SMDI #0400 – U and Th
• Originally identified by W.G.Q. Johnston while mapping the area for the Saskatchewan Geological Survey in 1974
Conclusions
• Same rock types, but different structural characteristics on either side of the Tabbernor Fault
• Lack of targeted exploration in the area
• Potential for VMS-type alteration/deposits
• Late radioactive granites/pegmatites
Acknowledgements
• Jr. Assistants: Nicholas Wicharuk, Jared Squire, Renee Larsen, and Kirsten Cunningham
• Colleagues at Saskatchewan Geological Survey
