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TitleWhy the Slave Province, Northwest Territories, got a little bigger
AuthorBleeker, W; Stern, R; Sircombe, K
SourceGeological Survey of Canada, Current Research (Online) no. 2000-C2, 2000, 9 pages,
PublisherNatural Resources Canada
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in Geological Survey of Canada; Geological Survey of Canada; (2000). Current Research 2000, Geological Survey of Canada, Current Research (Online) no. 2000-ABCDE
File formatpdf
ProvinceNunavut; Northwest Territories
NTS86A/13; 86A/14; 86B/13; 86B/14; 86B/15; 86B/16; 86C/15; 86C/16; 86F/01; 86F/02; 86F/07; 86F/08; 86F/09; 86F/10; 86G/01; 86G/02; 86G/03; 86G/04; 86G/05; 86G/06; 86G/07; 86G/08; 86G/09; 86G/10; 86G/11; 86G/12; 86H/03; 86H/04; 86H/05; 86H/06; 86H/11; 86H/12
AreaGrenville Lake; Great Slave Lake
Lat/Long WENS-117.0000 -113.0000 65.7500 64.7500
Subjectstectonics; stratigraphy; geochronology; Archean; bedrock geology; radiometric dates; zircon dates; tectonic elements; stratigraphic correlations; tectonic interpretations; quartzites; lead lead dates; Central Slave Cover Group; Slave Province; Epworth Group; Scotstoun Anticline; Exmouth Anticline; Acasta Gneiss Complex; Wopmay Orogen; Central Slave Basement complex; Precambrian
IllustrationsConcordia diagrams; sketch maps; analyses
Released2000 01 01
AbstractWe present evidence for extension of the Central Slave Cover Group into the realm of the northwestern Slave Province, thus uniting all Meso- and Paleoarchean basement of the Slave into a single cratonic nucleus formed by 2.85 Ga. The diagnostic cover sequence overlies ca. 2.9 Ga basement in the Grenville Lake area, and from there can be mapped on both limbs of the Emile River greenstone belt, around the Scotstoun Anticline, and further west into the immediate hanging wall of the Acasta Gneiss Complex. In the Acasta area, and around the Exmouth Anticline, quartzites, banded iron-formation, and overlying mafic volcanic rocks have been previously misidentified as Paleoproterozoic Epworth Group. Detrital-zircon data from two quartzite samples are presented to support our new interpretation that the quartzite and banded iron-formation sequence overlying Acasta basement correlates with the Central Slave Cover Group, and that much of central Wopmay is in fact Archean.