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TitleAn overview of gold grain distribution and geochemistry of till, Yellowknife Greenstone Belt, Northwest Territories
AuthorKerr, D E; Knight, R D
SourceGeological Survey of Canada, Current Research (Online) no. 2002-C7, 2002, 8 pages, (Open Access)
LinksCanadian Database of Geochemical Surveys, downloadable files
LinksBanque de données de levés géochimiques du Canada, fichiers téléchargeables
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Geological Survey of Canada; (2002). Current Research 2002, winter release, Geological Survey of Canada, Current Research no. 2002
File formatpdf (Adobe Acrobat Reader)
ProvinceNorthwest Territories
NTS85I/04; 85I/05; 85I/12; 85I/13; 85J/01; 85J/08; 85J/09; 85J/16; 85O/01; 85P/04
AreaYellowknife; Duncan Lake; Prelude Lake; Prosperous Lake; Discovery Lake; Nicholas Lake; Banting Lake; Walsh Lake
Lat/Long WENS-114.5000 -113.5000 63.2500 62.0000
Subjectseconomic geology; soils science; gold; mineral occurrences; greenstone belts; glacial deposits; drift deposits; tills; till geochemistry; ice movement directions; soil profiles; Yellowknife Greenstone Belt; Precambrian; Proterozoic
Illustrationssketch maps; photographs; graphs; tables
ProgramCanada-Northwest Territories Exploration Science and Technology [EXTECH III] Initiative, 1999-2003, Yellowknife Mining Camp
Released2002 02 15
AbstractOngoing surficial geology studies and geochemical analyses of till and vegetation in the Yellowknife Greenstone Belt provide additional baseline data for mineral exploration and environmental studies. Soil profiles incorporating biogeochemical data may differentiate between elements from anthropogenic or natural sources. Newly recorded ice-flow indicators in areas of high mineral potential are consistent with regional southwestward ice movement of the last glaciation. Minor variations indicate property-scale local late-glacial flow from 230° to 255°. Gold-grain counts of the heavy-mineral fraction in till indicate background values over volcanic rocks of approximately 0 to 5 grains/10 kg of till. Significant concentrations of gold grains occur in till over some former mines, suggesting that visible gold-grain counts is a viable exploration method in the Yellowknife area. Anomalous concentrations of 20 to 30 gold grains/sample reflect potential exploration targets. Of particular interest are high gold-grain counts at locations underlain by metasedimentary terrain in the Banting and Walsh lakes areas.