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TitleQuartzite sequences and their relationships, Woodburn Lake group, western Churchill Province, Nunavut
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AuthorZaleski, E; Pehrsson, S; Duke, N; Davis, W J; L'Heureux, R; Greiner, E; Kerswill, J A
SourceGeological Survey of Canada, Current Research (Online) no. 2000-C7, 2000, 10 pages, https://doi.org/10.4095/211098
Year2000
PublisherNatural Resources Canada
Documentserial
Lang.English
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
NTS56E/04; 56E/05; 56E/12; 66H/01; 66H/08; 66H/09
AreaPipedream Lake; Third Portage Lake; Meadowbank River; Ukalik lake
Lat/Long WENS-96.5000 -95.5000 65.7500 65.0000
Subjectsstratigraphy; igneous and metamorphic petrology; Archean; bedrock geology; quartzites; conglomerates; sedimentary rocks; volcanic rocks; igneous rocks; mineralization; gold; stratigraphic correlations; field relations; lithostratigraphy; metamorphic facies; lithology; ultramafic rocks; iron formations; pyrite; conglomerates; Woodburn Lake group; Churchill Province; Amer Group; Proterozoic; Precambrian
Illustrationssketch maps; photographs
ProgramWestern Churchill NATMAP Project
Image
Released2000 01 01
AbstractArchean orthoquartzite units of the Woodburn Lake group are part of a diverse volcanic and volcanogenic sedimentary package, in contrast to the cratonic sedimentary rocks of the Paleoproterozoic Amer group. Woodburn Lake quartzite is interbedded with pyritic quartz-pebble conglomerate, chloritoid-kyanite slate, and iron-formation, none of which have been described from the Amer group. Pyritic conglomerate presents a potential for paleoplacer and modified placer gold, which could have had a local source in underlying mineralized volcanic and sedimentary rocks. The presence of pyritic conglomerate is consistent with deposition in the reducing atmosphere characteristic of Archean time and may prove to be a diagnostic tool for discriminating Archean from Paleoproterozoic quartzite successions in the region. Archean ultramafic rocks and gossanous iron-formation can be traced discontinuously south of the Amer belt, considerably extending the strike-length of the suite, which is known to host gold occurrences.
GEOSCAN ID211098