GEOSCAN Search Results: Fastlink


TitleGlacial landscape architecture and sediment sampling, Mary Frances Lake - Whitefish Lake - Thelon River area (NTS 75-I, 75-J, 75-O, 75-P), Northwest Territories, Canada
AuthorSharpe, D R; Lesemann, J -E; Knight, R D; Kjarsgaard, B A; Plourde, A P
SourceGeological Survey of Canada, Open File 7554, 2014, 34 pages, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatreadme
File formatpdf
ProvinceNorthwest Territories
NTS75I/11; 75I/12; 75I/13; 75I/14; 75I/15; 75J/09; 75J/10; 75J/15; 75J/16; 75O/01; 75O/02; 75O/08; 75P/02; 75P/03; 75P/04; 75P/05; 75P/06
AreaMary Frances Lake; Whitefish Lake; Thelon River; Williams Lake; Garde Lake; Bodie Lake; Olson Lake; Tyrrell Lake
Lat/Long WENS-106.8333 -104.6667 63.3833 62.6667
Subjectssurficial geology/geomorphology; sedimentology; glacial landforms; drumlins; glacial erosion; glacial deposits; eskers; hummocks; permafrost; strandlines; modelling; tills; glacial lakes; ice movement directions; sediments; sediment transport; ice transport directions; exploration guidelines; Quaternary
Illustrationsphotographs; models; geological sketch maps
ProgramRae Province Project Management, GEM2: Geo-mapping for Energy and Minerals
Released2014 11 10
Summary(Plain Language Summary, not published)
We present an analysis of glaciated terrain in support of a mineral exploration investigation in Thelon River watershed. Sediment samples (180) were analyzed in an ~3,500 km2 area southwest of Thelon wildlife sanctuary, east of the area of interest for Thaidene Nene. A long-standing conceptual model of Keewatin glacial terrain, and much of northern Canada, is shown to be inadequate to support mineral exploration sampling design. This active ice marginal retreat model relies on geomorphology related to ice flow features and to inferred end moraines, ice-marginal features and pro-glacial lakes. This model assumes these patterns have been known for years. However, definitive features have not been mapped in detail, nor have landform assumptions been tested. Our mapped erosional landforms and sediment observations conflict with this existing depositional model; these findings call for a revised strategy to interpret and assessing sediment sampling for mineral exploration.