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TitleEnvironmental significance of oncoids and crypto-microbial laminates from the Late Paleoproterozoic Athabasca Group, Saskatchewan and Alberta
DownloadFree download (whole publication) (zip 291344 KB)
AuthorYeo, G M; Percival, J B; Jefferson, C W; Ickert, R; Hunt, P
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. 315-323; 1 CD-ROM, https://doi.org/10.4095/223777
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
ProvinceAlberta; Saskatchewan
NTS64E/13; 64L/03; 64L/04; 64L/05; 64L/06; 64L/12; 64L/13; 74E/15; 74E/16; 74F/07; 74F/08; 74F/09; 74F/10; 74F/11; 74F/12; 74F/13; 74F/14; 74F/15; 74F/16; 74G; 74H/04; 74H/05; 74H/06; 74H/07; 74H/09; 74H/10; 74H/11; 74H/12; 74H/13; 74H/14; 74H/15; 74H/16; 74I; 74J; 74K; 74L; 74M/01; 74M/02; 74M/08; 74N/01; 74N/02; 74N/03; 74N/04; 74N/05; 74N/06; 74N/07; 74N/08; 74N/11; 74N/12; 74O/01; 74O/02; 74O/03; 74O/04; 74O/05; 74O/06; 74O/07; 74O/08; 74P/01; 74P/02; 74P/03; 74P/04; 74P/05; 74P/06; 74P/07
AreaLake Athabasca; Cree River; Cree Lake; Fond du lac; Stony Rapids; Fort Chipewyan; Richardson River; Wollaston Lake; McClean Lake; Key Lake; Maybelle River; McArthur River; Shea Creek; Cigar Lake; Cluff Lake; Hook Lake; Read Lake
Lat/Long WENS-112.0000 -103.0000 59.7500 57.0000
Subjectsstratigraphy; sedimentology; uranium; unconformities; sedimentation; sedimentary rocks; sandstones; conglomerates; mudstones; clays; basins; sedimentary basins; basement geology; bedrock geology; lithostratigraphy; Archean; microorganisms; sedimentary structures; crossbedding; laminations; sedimentary environments; laminites; depositional environment; Athabasca Basin; Athabasca Group; Rae Province; Hearne Province; oncoids; Precambrian; Proterozoic
Illustrationssketch maps; photomicrographs; tables
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
AbstractCentimetre-sized, concentrically laminated structures from lower Athabasca Group strata at Maybelle River and Hook Lake in southwestern Athabasca Basin are interpreted to be organosedimentary clay oncoids that grew in pools in ephemeral river systems or in scattered lakes that developed during an erosional hiatus after deposition of the Fair Point Formation. In the Read Lake area, microscopic laminae are preserved in microcrystalline quartz that cements angular siliciclastic breccia fragments; these are also of probable microbial origin. These observations contribute to a growing body of evidence for life in Proterozoic nonmarine environments. They also suggest a humid regional climate postdating Fair Point Formation deposition and predating deposition of the Read and Smart formations, that have characteristics of flashy braided river deposits laid down in an arid environment. Furthermore, these rare organosedimentary features have the potential to be a unique stratigraphic marker in Athabasca Basin.
GEOSCAN ID223777