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TitleTargeted Geoscience Initiative 5: integrated multidisciplinary studies of unconformity-related uranium deposits from the Patterson Lake corridor, northern Saskatchewan
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorPotter, E GORCID logo; Tschirhart, VORCID logo; Powell, J WORCID logo; Kelly, C J; Rabiei, M; Johnstone, D; Craven, J A; Davis, W JORCID logo; Pehrsson, S; Mount, S M; Chi, G; Bethune, K M
SourceGeological Survey of Canada, Bulletin 615, 2020, 37 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Mediaon-line; digital
RelatedNRCan photo(s) in this publication
RelatedThis publication is related to Reactivated basement faults and uranium-rich fluid pathways in the Athabasca Basin: new insights from the Patterson Lake corridor, northwestern Saskatchewan
File formatpdf
NTS74F/11; 74F/14
AreaForest Lake; Murison Lake
Lat/Long WENS-109.5000 -109.0000 58.0000 57.5000
Subjectseconomic geology; tectonics; structural geology; geophysics; geochemistry; geochronology; mineralogy; Science and Technology; Nature and Environment; mineral deposits; uranium; unconformity-type deposit; mineral exploration; mineral potential; ore mineral genesis; mineralization; ore controls; fluid dynamics; fluid inclusions; sodium chloride; calcium chloride; brine; quartz veins; precipitation; metals; tectonic history; alteration; metamorphism; deformation; faulting; fluid flow; hydrothermal systems; thermal history; radiogenic heat; geothermal gradient; paragenesis; intrusions; dykes; emplacement; burial history; host rocks; bedrock geology; basement geology; structural features; faults; fractures; shear zones; lithology; ultramafic rocks; mafic rocks; igneous rocks; intrusive rocks; granites; granodiorites; felsic intrusive rocks; sedimentary rocks; sandstones; pressure-temperature conditions; isotopic studies; boron geochemistry; iron geochemistry; pyrite; tourmaline; phase determination; geophysical interpretations; modelling; magnetic interpretations; total field magnetics; magnetic susceptibility; gravity interpretations; bouguer gravity; magnetotelluric interpretations; structural interpretations; drillholes; drill core analyses; crustal structure; mantle; thermal analyses; zircon dates; Archean; Paleogene; Triple R Deposit; Arrow Deposit; Spitfire Deposit; Athabasca Basin; Clearwater Domain; Patterson Lake Corridor; Taltson Domain; Taltson Magmatic Zone; Rae Province; Marguerite River Fault; Beatty River Fault; Davy Lake Fault; Douglas River Dykes; Mackenzie Dykes; Snowbird Tectonic Zone; Hearne Province; Tantato Domain; Black Bay Fault; Bustard Fault; Grease River Fault; Harrison Fault; Athabasca Supergroup; Phanerozoic; Cenozoic; Tertiary; Mesozoic; Cretaceous; Paleozoic; Devonian; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; digital elevation models; geophysical profiles; plots; geochemical plots; equal-area stereonet projections; geochronological charts; ternary diagrams; photomicrographs; photographs; geochemical profiles; frequency distribution diagrams; histograms; models
ProgramTargeted Geoscience Initiative (TGI-5) Uranium ore systems - fluid pathways
Released2020 11 16
AbstractBasement-hosted uranium deposits of the Patterson Lake corridor are located on the southwestern margin of the Athabasca Basin in atypical hosts: altered and metamorphosed granite, granodiorite, and ultramafic to mafic rocks. Fluid inclusions record incursion of two fluids, NaCl- and CaCl2-dominant, at temperatures up to 250°C and approximately 1 km into the basement during episodic brittle reactivation of high-strain-ductile to brittle-ductile structures, in particular late west- and north-northwest-striking brittle conjugate faults that crosscut the Athabasca sandstone. Isotopic data from pyrite and tourmaline record basinal fluid-rock interactions under fluctuating pressure and oxidizing to reducing conditions. New 3-D geophysical modelling illustrates linkages between the surface architecture and lower crust to mantle and influence of the Clearwater Domain granitic intrusions on the ore systems. High radiogenic heat production from these intrusions and other ca. 1.8 Ga felsic intrusions contributed to a prolonged, elevated geothermal gradient under the Proterozoic basins that permitted shallow (less than 3 km) depths of mineralization.
Summary(Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI) is a collaborative federal geoscience program that provides industry with the next generation of geoscience knowledge and innovative techniques to better detect buried mineral deposits, thereby reducing some of the risks of exploration. This contribution summarizes the results of the five-year study on the Patterson Lake corridor. Located along the southwestern margin of the Athabasca Basin in Saskatchewan, the corridor hosts high-grade uranium deposits (Triple R and Arrow) that differ from the traditional Athabasca Basin uranium deposits. The results of the study support classification of the deposits as unconformity-related but highlight the role of high-heat producing granitic intrusions in driving the hydrothermal fluid cells that formed the deposits.

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