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TitleGeology, Qikigtalik, Victoria Island, Northwest Territories
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AuthorRainbird, R H; Bédard, J H; Dewing, K; Hadlari, T
SourceGeological Survey of Canada, Canadian Geoscience Map 177, 2015, 1 sheet, https://doi.org/10.4095/296801
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; JPEG2000
ProvinceNorthwest Territories
NTS87H/11
AreaVictoria Island; Qikigtalik
Lat/Long WENS-115.0000 -114.0000 71.7500 71.5000
Subjectsstratigraphy; structural geology; bedrock geology; sedimentary rocks; marine deposits; sandstones; dolostones; limestones; shales; igneous rocks; dykes; sills; faults; intrusive rocks; structural features; Franklin Intrusions; Victoria Island Formation; Mount Phayre Formation; Uvayualuk Formation; Shaler Supergroup; Minto Inlet Formation; Kilian Formation; Wynniatt Formation; Cenozoic; Ordovician; Cambrian; Proterozoic
Viewing
Location
 
Natural Resources Canada Library - Ottawa (Earth Sciences)
 
ProgramWestern Arctic Project Management, GEM2: Geo-mapping for Energy and Minerals
Image
Released2015 08 07
AbstractBedrock geology of NTS 87-H/11 is heavily masked by Quaternary glacial till (~75% of map's area). It is underlain mainly by carbonate rocks and dark shales of the middle-upper Wynniatt Formation of the Shaler Supergroup, which is best-exposed in the SW corner of the map area. Together with several thick (up to 50m) diabase sills, these strata comprise the gently south-dipping northern limb of the Holman Island Syncline. The outcrop pattern of bedrock units on this map is strongly influenced by evenly spaced, ENE-striking normal faults that form horst and gräben, with variable along-strike separation and are thus akin to piano keys. Proterozoic rock s are unconformably overlain by Early Cambrian to Ordovician (?) strata of the recently defined, Quyuk , Uvayualuk and Mount Phayre formations, which are preserved in the gräben. Faults cut all of the bedrock units in the map area indicating that latest movement occurred in Ordovician or later times.
Summary(Plain Language Summary, not published)
NTS 87H/11 is underlain by the Jago Bay, Minto Inlet and lower Wynniatt formations of the Shaler Supergroup. Together with diabase sills, these strata comprise the gently south-dipping northern limb of the Holman Island Syncline. The outcrop pattern on this map is strongly influenced by evenly spaced, ENE-trending block faults with offsets up to 200 m. Many outcrops exhibit reddish, oxidative alteration that is interpreted to reflect pre-Cambrian chemical weathering. In the northern half of the map area, down-dropped fault blocks preserve Cambrian sedimentary rocks, including a lower sandstone unit and overlying, orange-weathering dolostone unit. A topographically prominent, irregular diabase intrusion trends NNW from the northern shore of Minto Inlet. This may represent a broad magmatic intrusion because it cuts across sedimentary strata and parts of the body appear to feed laterally into diabase sills.
GEOSCAN ID296801