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TitleInterpretations of Precambrian basement based on recent aeromagnetic data, Mackenzie Valley, Northwest Territories
AuthorAspler, L B; Pilkington, M; Miles, W F
SourceGeological Survey of Canada, Current Research (Online) no. 2003-C2, 2003, 11 pages,
PublisherNatural Resources Canada
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in the following publications
File formatpdf
ProvinceNorthwest Territories
NTS85D; 85E; 95A; 95B; 95G; 95H; 95I; 95J; 95K; 95N; 95O; 96C; 96D; 96E; 96F; 106G; 106H; 106I; 106J; 106K; 106L; 106M; 106N; 106O; 106P; 107B; 107C; 117A; 117D
AreaMackenzie Valley
Lat/Long WENS-140.0000 -118.0000 70.0000 60.0000
Subjectsregional geology; geophysics; tectonics; aeromagnetic interpretation; aeromagnetic surveys; geophysical surveys; bedrock geology; magnetic field; magnetic interpretations; magnetic modelling; tectonophysics; tectonic interpretations; Slave Province; Wopmay Orogen; Great Bear Magmatic Zone; Fort Simpson terrane; Precambrian
Illustrationssketch maps; geophysical profiles
Released2003 03 14
AbstractBetween 1998 and 2001, the Geological Survey of Canada acquired new aeromagnetic data over the northern Mackenzie Valley, a region of long-standing hydrocarbon and mineral potential. The new data point to a hitherto unidentified structure ('Cape Bathurst line') extending from western Great Bear Lake to Cape Bathurst. This structure may define the western limit of the Slave Province and truncate the
Great Bear magmatic zone (easternWopmayOrogen). The data also suggest that the Fort Simpson magnetic high continues west to the Tintina Fault. Although the anomaly apparently has a source in crystalline basement, we cannot demonstrate that it represents a single tectonic entity (Fort Simpson terrane) along its entire length. The style of thrusting in the Colville Hills during the ca. 1.66 Ga Forward Orogeny has been controversial; magnetic modelling is consistent with crystalline basement thin-skinned interpretations.