|Title||Reconnaissance geological mapping and thematic studies of northern Brock Inlier, Northwest Territories|
|Author||Rainbird, R H; Ielpi, A; Turner, E C; Jackson, V A|
|Source||Geological Survey of Canada, Open File 7695, 2015, 10 pages, https://doi.org/10.4095/295697|
|Publisher||Natural Resources Canada|
|Area||Brock Inlier; Brock River|
|Lat/Long WENS||-124.0000 -122.0000 69.5000 69.2500|
|Subjects||economic geology; stratigraphy; sedimentology; mineral potential; depositional environment; depositional history; mineralization; sedimentary rocks; tectonostratigraphic zones; lithofacies;
magnetotelluric surveys; magnetotelluric interpretations; sandstones; Mikkelsen Islands Formation; Nelson Head Formation; Precambrian; Proterozoic|
|Illustrations||location maps; photographs; stratigraphic columns|
|Program||Mackenzie Corridor, Shield to Selwyn, GEM2: Geo-mapping for Energy and Minerals|
|Released||2015 01 19|
The Geo-mapping for Energy and Minerals (GEM) program is laying the foundation for sustainable economic development in the North. The Program provides modern public
geoscience that will set the stage for long-term decision making related to investment in responsible resource development. Geoscience knowledge produced by GEM supports evidence-based exploration for new energy and mineral resources and enables
northern communities to make informed decisions about their land, economy and society. Building upon the success of its first five-years, GEM has been renewed until 2020 to continue producing new, publically available, regional-scale geoscience
knowledge in Canada's North.
During the summer 2014, GEM's new research program has been launched with 14 field activities that include geological, geochemical and geophysical surveying. These activities have been undertaken in collaboration with
provincial and territorial governments, northerners and their institutions, academia and the private sector. GEM will continue to work with these key collaborators as the program advances.
The Brock Inlier project is an activity within the Shield
to Selwyn geo-transect: studying the evolution of sedimentary rocks of the northern mainland NWT to improve exploration success: This activity will initiate the first regional integrated effort to place Proterozoic to Cenozoic strata of Mackenzie
Platform, Selwyn Basin, and adjacent regions into a fully modern tectono-stratigraphic and metallogenic framework, and will better enable industry and Northerners to responsibly find and develop energy and mineral natural resources, maximizing their
economic and societal impact.
|Summary||(Plain Language Summary, not published)|
The results of initial thematic studies, including detailed sedimentological and stratigraphic studies of the early Neoproterozoic Rae Group (Mukkelsen
Islands and Nelson Heag formation) are presented. Regional geological reconnaissance has identified several regions of NTS 97A that should be re-mapped owing to mis-identification of Cambrian sedimentary units as belonging to the Proterozoic Rae
Group. We recommend that the Brock River area, originally mapped by helicopter reconnaissance in 1968, be re-mapped using current stratigraphic knowledge and terminology.