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TitlePrecambrian geology, Victory and Mackenzie lakes, Nunavut and significance of 'Mackenzie Lake metasediments', Paleoproterozoic Hurwitz Group
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AuthorAspler, L B; Armitage, A E; Ryan, J J; Hauseux, M; Surmacz, S; Harvey, B J A
SourceGeological Survey of Canada, Current Research (Online) no. 2000-C10, 2000, 10 pages, https://doi.org/10.4095/211154
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
NTS55L/11NW; 55L/12
AreaMackenzie Lake; Victory Lake
Lat/Long WENS-96.0000 -95.4167 62.7500 62.5000
Subjectsigneous and metamorphic petrology; structural geology; bedrock geology; metamorphic rocks; metasedimentary rocks; lithology; deformation; conglomerates; structural features; mineral deposits; base metals; dykes; igneous rocks; volcanic rocks; facies; folds; faults; Hurwitz Group; Noomut Formation; Padlei Formation; Maguse Member; Kinga Formation; Kaminak Group; Christopher Island Formation; Churchill Province; Proterozoic
Illustrationssketch maps; photographs; cross-sections
ProgramWestern Churchill NATMAP Project
Image
Released2000 01 01
AbstractSiliciclastic remnants in the Victory-Mackenzie lakes area ('Mackenzie Lake metasediments') correlate with the lower Hurwitz Group (Paleoproterozoic; Noomut and Padlei formations; Maguse Member, Kinga Formation). Hurwitz strata and basement are tightly infolded about steeply dipping axial surfaces. However, northwest of Mackenzie Lake, screens of mafic volcanic and immature supracrustal rocks within leucogranite are likely Kaminak Group (Neoarchean), and display shallowly dipping folds, fabrics, and shear zones. The Mackenzie Victory lakes area may represent a suprastructure preserving the Hurwitz Group in basement-cover infolds; the northwestern area may represent an infrastructure with intrabasement high-strain zones. Deformation occurred before ca. 1.85 1.83 Ga (age of pristine lamprophyre dykes), and after ca. 2.45 Ga (age of foliated Kaminak dykes). Clasts in Hurwitz conglomerate lack internal tectonic fabrics despite penetratively deformed source rocks, hence the primary tectonic imprint was Paleoproterozoic. Base-metal prospects discovered by Comaplex Minerals Corp. in Kaminak Group volcanogenic strata display features characteristic of volcanic massive sulphide deposits.
GEOSCAN ID211154