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TitleGeology, Tebesjuak Lake, Nunavut
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AuthorPeterson, T D; Scott, J M J; Lecheminant, A N; Chorlton, L B; D'Aoust, B M A
SourceGeological Survey of Canada, Canadian Geoscience Map 158, 2014, 1 sheet, https://doi.org/10.4095/293892
Year2014
PublisherNatural Resources Canada
Editionprelim.
Documentserial
Lang.English
Maps1 map
Map Info.geological, structural, lithological, 1:250,000
ProjectionUniversal Transverse Mercator Projection, zone 14 (NAD83)
Mediaon-line; digital
RelatedThis publication is related to LeCheminant, A N; (1981). Geology, Tebesjuak lake, District of Keewatin, Geological Survey of Canada, Open File 728
File formatreadme
File formatpdf; shp; xml; xls; jpg; JPEG2000
ProvinceNunavut
NTS65O
AreaWharton Lake; Tebesjuak Lake; Tulemalu Bay; Mallery Lake
Lat/Long WENS-100.0000 -98.0000 64.0000 63.0000
Subjectsstratigraphy; structural geology; geochronology; economic geology; bedrock geology; volcanic rocks; intrusive rocks; igneous rocks; rhyolites; tuffs; basalts; sedimentary rocks; conglomerates; sandstones; rhyodacites; amphibolites; migmatites; granites; gneisses; metamorphic rocks; dykes; gabbros; Archean; structural features; folds; mineral occurrences; alteration; uranium lead dates; Dubawnt Supergroup; Barrensland Group; Thelon Formation; Warton Group; Pitz Formation; Baker Lake Group; Kunwak Formation; Christopher Island Formation; Amer Group; Snow Island Suite; Marjorie Hills assemblage; Kivalliq igneous suite; Hudson intrusive suite; Precambrian; Proterozoic
Illustrationslocation maps
ProgramUranium, GEM: Geo-mapping for Energy and Minerals
Image
Released2014 05 28
AbstractThe map area is underpinned by three Archean terranes from west to southeast: the Snow Island Suite of 2.6 Ga granite-rhyolite (AS), the Marjorie Hills assemblage of metasedimentary and granitoid gneiss (AMH), and orthogneiss of the Chesterfield block (unit Agn). The AS-AMH boundary is the Wharton Lake fault system, initially a southwest-dipping detachment. The AMH-Agn boundary is the dextral extensional Tulemalu Fault. Brittle reactivations of these faults localized sub-basins of the Baker Lake Group and hosted coeval intrusions of Martell Syenite (minette / ~1.83 Ga Hudson Granite mix). A Hudson Granite plug intrudes the AMH. Early gabbro/anorthosite (~1.77 Ga) of the Kivalliq igneous suite was intruded by Nueltin granite, co-magmatic with bimodal Pitz Formation lavas and the ~1.75 Ga, 015° McRae Lake diabase dyke swarm and compositionally related 075° Thelon River dyke swarm. Cu-Pb veins and replacements formed near mafic centres and Au-Ag-bearing quartz veins near felsic centres.
Summary(Plain Language Summary, not published)
The Tebesjuak Lake map sheet (65O, 1:250,000 scale) is dominated by mafic and felsic volcanic and subvolcanic intrusive rocks of the Wharton Group and Kivalliq igneous suite (ca. 1.75 Ga). These intruded/overlie dominantly quartofeldspathic Archean gneisses, overlain by early Proterozoic supracrustal rocks of the Amer Group (ca. 2.1 Ga) and potassic volcanic rocks of the Baker Lake Group (ca. 1.83 Ga). The sheet contains the type locality of the Pukiq Lake Formation (ca. 2.6 Ga) rhyodacite, extrusive equivalent of the Snow Island Suite. This digital map includes layers of geology, geochronology, mineral showings and structural data. Data sources include the original Open File 728 (LeCheminant, 1981), new data from the Northern Uranium Canada project, Geo-Mapping for Energy and Minerals, and published papers, reports, and theses from various universities and exploration companies.
GEOSCAN ID293892