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TitleStructural evolution and related implications for uranium mineralization in the Patterson Lake corridor, southwestern Athabasca Basin, Saskatchewan, Canada
AuthorJohnstone, D DORCID logo; Bethune, K M; Card, C D; Tschirhart, VORCID logo
SourceGeochemistry: Exploration, Environment, Analysis vol. 21, issue 1, 2021 p. 1-27,
Alt SeriesNatural Resources Canada, Contribution Series 20210023
PublisherThe Geological Society of London for GSL and AAG
Mediapaper; on-line; digital
File formatpdf
NTS74F; 74G; 74H; 74I; 74J; 74K; 74N; 74O; 74P
Lat/Long WENS-110.0000 -104.0000 60.0000 57.0000
Subjectseconomic geology; structural geology; Science and Technology; Nature and Environment; mineral exploration; mineral deposits; uranium; ore mineral genesis; mineralization; remobilization; structural controls; tectonic history; deformation; intrusions; dykes, mafic; basin evolution; subsidence; basement geology; host rocks; bedrock geology; structural features; faults; folds; shear zones; foliation; uraninite; Athabasca Basin; Patterson Lake Corridor
Illustrationslocation maps; cross-sections; photomicrographs; stereograms; schematic diagrams
ProgramTargeted Geoscience Initiative (TGI-6) Ore systems
Released2021 02 17
AbstractThe Patterson Lake corridor is situated along the SW margin of the Athabasca Basin and contains several basementhosted uranium deposits and prospects. Drill core investigations during this study have determined that granite, granodiorite, mafic and alkali intrusive basement rocks are entrained in a deep-seated NE-striking subvertical heterogeneous high-strain zone defined by anastomosing ductile to semi-brittle shears and brittle faults. The earliest phases of ductile deformation (D1/D2), linked with Taltson (1.94-1.92 Ga) orogenesis, involved interference between early fold sets (F1/F2) and development of an associated ductile transposition foliation (S1/S2). During subsequent Snowbird (c. 1.91-1.90 Ga) tectonism, this composite foliation was re-folded (D3) by NE-trending buckle-style folds (F3), including a regional fold centred on the Clearwater aeromagnetic high. In continuum with D3, a network of dextral-reverse chloritic-graphitic shears, with C-S geometry, formed initially (D4a) and progressed to more discrete, spaced semi-brittle structures (D4b; c. 1.900-1.819 Ga). Basin development (D5a;
Summary(Plain Language Summary, not published)
This contribution to the Targeted Geoscience Initiative program uses geological information to understand the tectonic evolution of the Patterson Lake Corridor in southwestern Athabasca Basin and it's relationship to uranium mineralization. The findings from this study have implications for future uranium exploration in the region by better understanding the structural and tectonic setting of this understudied region of the Canadian Shield.

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