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TitleGEM-Mackenzie: bedrock mapping and related stratigraphic studies, 2009-2019
AuthorFallas, K M; MacNaughton, R B
SourceGeological Survey of Canada, Open File 8587, 2019, 55 pages, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatpdf (Adobe® Reader®)
ProvinceNorthwest Territories
NTS96E; 96F; 96K; 96L; 96M; 96N; 106G/01; 106G/02; 106G/03; 106G/04; 106G/05; 106G/06; 106G/07; 106G/08; 106H/01; 106H/02; 106H/03; 106H/04; 106H/05; 106H/06; 106H/07; 106H/08
AreaMackenzie River; Gwich'in; Sahtu; Franklin Mountains; Colville Lake; Norman Wells; Tulita; Colville Hills
Lat/Long WENS-132.0000 -124.0000 68.0000 65.0000
Subjectsregional geology; stratigraphy; structural geology; fossil fuels; economic geology; geophysics; Science and Technology; systematic stratigraphy; stratigraphic nomenclature; bedrock geology; lithology; sedimentary rocks; shales; sandstones; siltstones; quartzites; conglomerates; evaporites; breccias; limestones; dolostones; igneous rocks; intrusive rocks; gabbros; volcanic rocks; volcaniclastics; structural features; faults; folds; hydrocarbon potential; petroleum occurrence; mineral potential; mineral occurrences; sedimentary basins; intrusions; sills; geophysical surveys; seismic surveys; tectonic history; deformation; Operation Norman; Mackenzie Plain; Peel Plateau; Peel Plain; Great Bear Plain; Brackett Basin; Summit Creek Formation; East Fork Formation; Trevor Formation; Little Bear Formation; Slater River Formation; Arctic Red Formation; Sans Sault Member; Mahoney Lake Formation; Martin House Formation; Imperial Formation; Horn River Group; Canol Formation; Ramparts Formation; Hare Indian Formation; Hume Formation; Landry Formation; Arnica Formation; Bear Rock Formation; Delorme Group; Tatsieta Formation; Tsetso Formation; Peel Formation; Road River Group; Cloudy Formation; Mount Kindle Formation; Marmot Formation; Duo Lake Formation; Rabbitkettle Formation; Franklin Mountains Formation; Hess River Formation; Nainlin Formation; Saline River Formation; Mount Cap Formation; Mount Clark Formation; Windermere Supergroup; Sekwi Formation; Vampire Formation; Backbone Ranges Formation; Sheepbed Carbonate; Sheepbed Formation; Hay Creek Group; Hayhook Formation; Ravensthroat Formation; Keele Formation; Twitya Formation; Rapitan Group; Shezal Formation; Sayunei Formation; Coates Lake Group; Coppercap Formation; Thundercloud Formation; Little Dal Group; Ram Head Formation; Snail Spring Formation; Ten Stone Formation; Gayna Formation; Stone Knife Formation; Stone Knife Reefs; Dodo Creek Formation; Katherine Group; Abraham Plains Formation; McClure Formation; Shattered Range Formation; Etagochile Formation; Grafe River Formation; Tawu Formation; Eduni Formation; Tsezotene Formation; Tabasco Formation; Neoproterozoic; Ediacaran; Cryogenian; Tonian; Mesoproterozoic; geological mapping; archival data; Phanerozoic; Mesozoic; Cretaceous; Paleozoic; Devonian; Silurian; Ordovician; Cambrian; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; index maps; stratigraphic charts; correlation sections; photographs
ProgramGEM2: Geo-mapping for Energy and Minerals, Mackenzie Corridor, Shield-to-Selwyn geo-transect, Mackenzie-Selwyn sub-activity
Released2019 07 18
AbstractThe Geo-mapping for Energy and Minerals (GEM) Program provided an opportunity to update the state of bedrock geological mapping for nearly 92,000 km2 of the northern mainland Northwest Territories, in a swath extending from the Colville Hills and Great Bear Plain, westward to the eastern and northern Mackenzie Mountains. Mapping focused initially on the region around the long-producing Norman Wells oil field, and subsequently extended north to the Colville Hills, a region of known oil and gas potential, and west into the Mackenzie Mountains, an area with numerous mineral showings. The result will be 24 new bedrock geology maps at 1:100 000 or 1:250 000 scales, published in GIS-enabled format as Canadian Geoscience Maps (CGMs). The mapping effort made extensive use of archival GSC data, notably those preserved following Operation Norman (1968-1970), as well as public-domain industry data. Maps incorporate numerous stratigraphic revisions that post-date the Operation Norman era, including innovations from the GEM program that affect a number of Tonian, Ediacaran, Cambrian, and Ordovician units. The present report is an overview of the mapping efforts, including summaries of stratigraphic revisions, as well as a preliminary treatment of the structural geology of the study area. Also included is a brief summary of subsurface studies. Following the conclusion of the GEM program, modern, GIS-enabled bedrock maps will be available for a swath of territory extending from the edge of the Selwyn Basin, near the Yukon border, to the Brock Inlier in the northeastern mainland Northwest Territories.
Summary(Plain Language Summary, not published)
The report describes progress in bedrock mapping in the northern mainland NWT during the GEM Program. More than 92,000 km2 was remapped in the Mackenzie Plain region around Norman Wells, the Colville Hills region, and the eastern and northern Mackenzie Mountains. The report describes the application of modern methods based on geographic information systems (GIS) to bedrock geology mapping. It discusses efforts to incorporate data from earlier GSC mapping programs into our work. It summarizes how the names of rock units in the region have changed since the last major GSC mapping effort (Operation Norman, 1968-1970) in the region, and describes how we have applied the new rock unit names on our maps. It also provides a preliminary overview of the geological structures (faults, folds) found in the region, and how their character changes from place to place. The report is intended to summarize ten years of work, and to provide a convenient place for interested parties to find relevant geological information on the region.