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TitleContext of the Deilmann orebody, Key Lake mine, Saskatchewan
DownloadFree download (whole publication) (zip 291344 KB)
AuthorHarvey, S E; Bethune, K M
SourceEXTECH IV: Geology and Uranium EXploration TECHnology of the Proterozoic Athabasca Basin, Saskatchewan and Alberta; by Jefferson, C W (ed.); Delaney, G (ed.); Geological Survey of Canada, Bulletin no. 588, 2007 p. 249-266; 1 CD-ROM, https://doi.org/10.4095/223770
Year2007
Alt SeriesSaskatchewan Geological Society Special Publication 18
Alt SeriesGeological Association of Canada, Mineral Deposits Division, Special Publication 4
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediapaper; CD-ROM
RelatedThis publication is contained in Jefferson, C W; Delaney, G; (2007). EXTECH IV: Geology and Uranium EXploration TECHnology of the Proterozoic Athabasca Basin, Saskatchewan and Alberta, Geological Survey of Canada, Bulletin no. 588
RelatedThis publication is contained in Jefferson, C W; Delaney, G; (2007). EXTECH IV: Geology and Uranium EXploration TECHnology of the Proterozoic Athabasca Basin, Saskatchewan and Alberta, Geological Survey of Canada, Bulletin no. 588
ProvinceSaskatchewan
NTS74H/04
AreaKey Lake
Lat/Long WENS-106.0000 -105.5000 57.2500 57.0000
Subjectseconomic geology; stratigraphy; structural geology; mineralogy; mineral exploration; exploration; exploration activities; uranium; uranium deposits; mineralization; unconformity-type deposit; unconformities; alteration; hydrothermal alteration; metasedimentary rocks; basins; sedimentary basins; basin analysis; basin formation; basin evolution; structural features; structural analysis; structural interpretations; faults; shear zones; basement geology; bedrock geology; Archean; deformation; metamorphism; metamorphic rocks; gneisses; intrusive rocks; granites; paleotopography; Athabasca Basin; Athabasca Group; Wollaston Domain; Hearne Province; Deilmann orebody; Daly Lake Group; Key Lake Fault; Precambrian; Proterozoic
Illustrationssketch maps; stereonets; cross-sections; photographs
ProgramAthabasca Uranium Multi-disciplinary Study, Exploration Science and Technology (EXTECH IV) Initiative, 2000-2003
ProgramNorthern Resources Development Program
ProgramSecure Canadian Energy Supply
Released2007 07 20
AbstractThe Deilmann orebody was formed at the intersection of the unconformity underlying Athabasca Group and an east-northeast-trending anastomosing zone of deformation centred on graphite-bearing metasedimentary rocks of the Daly Lake Group. Four ductile to brittle-ductile deformational events predated deposition of the Athabasca Group, whereas two brittle deformational events occurred during and after deposition. Alteration and mineralization were intimately related to D5 faults, the most prominent of which is the Key Lake Fault. These formed by the brittle reactivation of older (predating Athabasca Group) fault structures. In a paleovalley on the unconformity surface underlying the Athabasca Group, the basal Athabasca Group sandstone onlaps the erosion surface, indicating early valley-fill deposition.
Overlying strata are characterized by horizontal, laterally continuous (sheet-like) bedding. The location and pattern of mineralization suggests that this feature, in part, affected fluid flow. Near-infrared reflectance spectrometry analyses on samples from the Deilmann pit allowed identification of a number of alteration patterns revealing a clear relationship with faults postdating the Athabasca Group. The relative abundance of these different alteration signatures is a useful exploration tool.
GEOSCAN ID223770