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TitleGeological significance of gravity anomalies in the area of McArthur River uranium deposit, Athabasca Basin, Saskatchewan
DownloadFree download (whole publication) (zip 291344 KB)
AuthorThomas, M D; Wood, G
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. 441-464; 1 CD-ROM, https://doi.org/10.4095/223790
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/15; 64L
AreaMcArthur River; Wollaston Lake
Lat/Long WENS-105.0000 -104.5000 58.0000 57.7500
Lat/Long WENS-104.0000 -102.0000 59.0000 58.0000
Subjectseconomic geology; geophysics; mineral exploration; exploration; uranium; uranium deposits; mineralization; unconformity-type deposit; unconformities; metamorphic rocks; gneisses; basins; sedimentary basins; structural features; faults; shear zones; basement geology; bedrock geology; Archean; geophysical surveys; gravity interpretations; gravity surveys; gravity anomalies; geophysical interpretations; metamorphism; densities; Athabasca Basin; Athabasca Group; Rae Province; Hearne Province; Mudjatik Domain; Precambrian; Proterozoic
Illustrationssketch maps; seismic profiles; tables; logs; cross-sections; plots
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
AbstractA gravity model is presented for a 27.2 km long, high-resolution gravity profile trending north-northwest across the mineralized P2 trend of the McArthur River uranium deposit. The model was derived in combination with magnetic modelling, and constrained by seismic data and interpretations, drillhole logs, and rock-property data. The crystalline basement is modelled as a series of units of pelitic, psammitic, and granitoid gneiss, separated generally by south-dipping, commonly steep contacts. The model supports an interpretation of the seismically defined south-dipping P2 fault as a thrust with steep splay faults in the hanging wall. It suggests also steep upthrusting within the Mudjatik Domain, and that the Mudjatik-Wollaston domain boundary is locally near vertical and possibly associated with flower structures.
The McArthur River deposit is associated with a 0.4 mGal amplitude gravity high attributed to silicification accompanying mineralization. Several prospective silicification zones are modelled, most of which are rooted on metasedimentary units.
GEOSCAN ID223790