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TitleGeology, Nalluryuaq, Victoria Island, Northwest Territories
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AuthorBédard, J H; Rainbird, R H; Williamson, M -C; Steigerwaldt, K; Carpenter, J C; Winpenny, A; Lafond, G; Hulbert, L J; Hryciuk, M; Nabelek, P I; Naslund, H R; MacDonald, W M; Ootes, L
SourceGeological Survey of Canada, Canadian Geoscience Map 103, 2015, 1 sheet, https://doi.org/10.4095/297284
Year2015
PublisherNatural Resources Canada
Editionprelim.
Documentserial
Lang.English
Maps1 map
Map Info.geological, bedrock and structural geology, 1:50,000
ProjectionUniversal Transverse Mercator Projection, zone 11 (NAD83)
Mediaon-line; digital
File formatreadme
File formatpdf; shp; xml; rtf; xls
ProvinceNorthwest Territories
NTS87G/07
AreaVictoria Island; Nalluryuaq; Aqiarulik; Ingaluaq
Lat/Long WENS-117.0000 -116.0000 71.8000 71.5000
Subjectsstratigraphy; structural geology; bedrock geology; sedimentary rocks; marine deposits; sandstones; dolostones; limestones; siltstones; shales; evaporites; carbonates; igneous rocks; volcanic rocks; dykes; sills; faults; intrusive rocks; structural features; Uvayualuk Formation; Quyuk Formation; Franklin Intrusions; Shaler Supergroup; Reynolds Point Group; Jago Bay Formation; Fort Collinson Foramtion; Boot Inlet Formation; Precambrian; Proterozoic
ProgramWestern Arctic Project Management, GEM2: Geo-mapping for Energy and Minerals
Image
Released2015 12 14
AbstractNTS 87-G/9 (Nalluryaq) and the southernmost part of NTS 87-G/16 are mostly underlain by Neoproterozoic Shaler Supergroup sedimentary rocks, with limestone and dolostone of the Boot Inlet and Jago Bay formations, quartz arenite of the Fort Collinson Formation, and gypsum evaporite of the Minto Inlet Formation. The latter locally form quarryable alabaster deposits as a result of contact metamorphism. Sedimentary rocks are injected by basaltic sills and dykes of Franklin age (ca. 720 Ma) that can be divided into older, more olivine-rich Type 1 intrusions and younger diabasic to feldspar-porphyritic Type 2 intrusions. Fe-oxide exoskarns are developed in the hangingwall panels of some synmagmatic normal faults. Strata are either flat-lying, or dip gently to the north or south to either side of the Walker Bay Anticline. Steeper bedding orientations occur near faults as a result of structural entrainment. A regional-scale basal unconformity separates Paleozoic clastic and carbonate rocks in the north from underlying Proterozoic rocks to the south, but the contact is often faulted, and isolated domains of Paleozoic rocks are preserved within graben. North-northwest-trending syn-magmatic (Proterozoic) and east-northeast-trending (Phanerozoic) normal faults are ubiquitous, breaking up the outcrop pattern into a series of polygonal blocks.
Summary(Plain Language Summary, not published)
Bedrock map of NTS 87 G/09, Victoria Island NWT
GEOSCAN ID297284