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TitleCurrent research, part C, Canadian Shield / Recherches En Cours, Partie C, Bouclier Canadien
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AuthorGeological Survey of Canada
SourceGeological Survey of Canada, Paper no. 92-1C, 1992, 276 pages, https://doi.org/10.4095/132842 (Open Access)
Image
Year1992
Documentserial
Lang.English; French
Mediapaper; on-line; digital
RelatedThis publication contains the following publications
File formatpdf
ProvinceQuebec; Saskatchewan; Ontario; Northwest Territories; Nunavut; Newfoundland and Labrador
NTS24E; 24J; 24K; 24L; 24P; 25C; 25D; 25E; 31J; 31P; 32E; 32F; 34; 35; 41I; 52B; 55; 56; 65; 66; 74O; 74P; 75C; 75L; 76; 78B; 85N; 85O; 86B; 86C; 86J; 86O; 96K; 96L; 96M; 96N; 97A
AreaMeliadine Lake; Barbour Bay; Matagami; Kovik Bay; Cap Wolstenholme; Brock Inlier; Elliot Lake; Exlipse Harbour; Ungava Peninsula; Lac Nominingue; Lac Leclair; Sudbury; Thelon Lake; Baker Lake; Montauban; Bray Lake; Montgomery Lake; Ameto Lake; Colville Hills; Tweed Lake; Hepburn Island; Snowdrift; Hill Island Lake; Hump Lake; Laughland Lake; Basler Lake; Abitibi; Labrador
Lat/Long WENS-128.0000 -64.0000 73.0000 46.0000
Subjectseconomic geology; geochemistry; geochronology; paleontology; sedimentology; stratigraphy; tectonics; geophysics; mineralogy; igneous and metamorphic petrology; surficial geology/geomorphology; structural geology; plutonic rocks; volcanic rocks; igneous rocks; metamorphic rocks; radiometric dates; depositional environment; lithology; analyses; geochemical analyses; faults; folds; shear zones; structural features; tectonic elements; metallogeny; deformation; metamorphism; mineral deposits; mineral assemblages; petrographic analyses; earthquakes; mineralization; seismic surveys; geophysical surveys; isotopes; Ungava Orogen; Shaler Group; Torngat Orogen; Central Metasedimentary Belt; Muskox Intrusion; Cape Smith Belt; Amundsen Basin; Southern Province; Grenville Province; Grenville Front; Superior Province; Thelon Lake Basin; Baker Lake Basin; Slave Province; Snare Group; Prince Albert Group; Wopmay Orogen; Precambrian; Proterozoic; Paleozoic
IllustrationsConcordia diagrams; tables; photomicrographs; seismic profiles; stratigraphic columns; aerial photographs; cross-sections; photographs; sketch maps; rose diagrams; analyses; stereonets; graphs
Released1992 02 01; 2013 03 18
AbstractThe Meliadine Lake area is underlain by an Archean (ca 2.63 Ga) supracrustal sequence which forms a regional scale, Archean F2 syncline. Along the north limb, three sets of pre-F2 mesoscopic folds are present in a turbidite-hosted, locally auriferous oxide ironjormation. An assemblage of biotite + chlorite in silicate-rich layers of the iron-formation is overprinted by random intergrowths of fine grained grunerite + hornblende + carbonate with pyrrhotite, and coarse hornblende +!- biotite with arsenopyrite. Textures suggest that gold mineralization is associated with S, Ca and C02 metasomatism, and is controlled by the oungest set of pre-F 2/olds. The Archean lithologies in the Barbour Bay region are dominated by polydeformed quartzofeldspathic gneiss, migmatite, granitoid plutons, paragneiss, amphibolite, and garnetiferous, silicate ironjormation. Folded high-strain zones containing tectonized remnants of anorthosite, gabbro, and pegmatite transect the gneisses. Four sets of folds and one event of amphibolite grade metamorphism are recognized. The distribution of lithologies is controlled by west-plunging F 3Jolds. The mapping indicates the presence of flat-lying, crustal-scale tectonic slabs.
GEOSCAN ID132842