Bedrock mapping and geological characterization in the ... · Bedrock mapping and geological...

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