| Title | Environmental significance of oncoids and crypto-microbial laminates from the Late Paleoproterozoic Athabasca Group, Saskatchewan and Alberta |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Yeo, G M; Percival, J B ; Jefferson, C W; Ickert, R; Hunt, P |
| Source | EXTECH 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  Open Access |
| Year | 2007 |
| Alt Series | Saskatchewan Geological Society Special Publication 18 |
| Alt Series | Geological Association of Canada, Mineral Deposits Division, Special Publication 4 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | paper; CD-ROM; on-line; digital |
| Related | This publication is contained in EXTECH IV: Geology and
Uranium EXploration TECHnology of the Proterozoic Athabasca Basin, Saskatchewan and Alberta |
| File format | pdf |
| Province | Alberta; Saskatchewan |
| NTS | 64E/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 |
| Area | Lake 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 |
| Subjects | stratigraphy; 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; Precambrian;
Proterozoic |
| Illustrations | sketch maps; photomicrographs; tables |
| Program | Exploration Science and Technology (EXTECH IV) Initiative, 2000-2003 |
| Program | Northern Resources Development Program |
| Program | Secure Canadian Energy Supply |
| Released | 2007 07 20 |
| Abstract | Centimetre-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 ID | 223777 |
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