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TitleGeology of parts of the Tumi Lake and Bea Lake sheets (NTS 85-N/7 and 85-N/10), Northwest Territories
AuthorGandhi, S S; Prasad, N
SourceGeological Survey of Canada, Open File 7547, 2014, 1 sheet,
PublisherNatural Resources Canada
Documentopen file
Maps1 map
Map Info.geological, bedrock, structural geology, 1:30,000
Mediaon-line; digital
File formatpdf
ProvinceNorthwest Territories
NTS85N/07; 85N/10
AreaTumi Lake; Bea Lake
Lat/Long WENS-116.9167 -116.5000 63.6667 63.4500
Subjectsstructural geology; stratigraphy; bedrock geology; plutonic rocks; granites; rhyolites; leucogranites; granodiorites; monzonites; monzodiorites; lithology; volcanic rocks; igneous rocks; rhyolites; rhyodacites; rhyolite porphyries; metasedimentary rocks; metamorphic rocks; unconformities; structural features; structural analyses; structural interpretations; Great Bear Magmatic Zone; Snare Group; Proterozoic
Illustrationslocation maps
Natural Resources Canada Library - Ottawa (Earth Sciences)
ProgramIron-oxide Copper-gold (IOCG) / Multiple Metals - Great Bear Lake (NWT), GEM: Geo-mapping for Energy and Minerals
Released2014 03 02
Summary(Plain Language Summary, not published)
This geological map covers part of an ancient volcanic belt of the Northwest Territories known as the Great Bear magmatic zone (GBMZ). The area hosts the NICO deposit (gold-cobalt-bismuth-copper), one of two Iron Oxide Copper-Gold (IOCG) deposits discovered in Canada. The Multiple Metals-Great Bear Region Project, Geomapping for Energy and Minerals Program (GEM, 2008-2013), undertaken by the Geological Survey of Canada and Northwest Territories Geoscience Office, has expanded the mineral potential of the GBMZ from known IOCG to related deposit types that could provide base, precious and high-technology metals including those to produce green energy technology. This map is based on data gathered under the Canada-Northwest Territories Mineral Development Subsidiary Agreement (1987-1991), unpublished until now. The Tlicho government opened the area for mineral exploration in spring, 2013, so it is timely to release all relevant documents.