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TitleGeophysical contributions to a synthesis of western Churchill geology and metallogeny
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorTschirhart, VORCID logo; Pehrsson, S; Wodicka, NORCID logo; Percival, J AORCID logo; Jefferson, C W; Peterson, T; Berman, R GORCID logo
SourceGeological Survey of Canada, Preprint 3, 2022, 47 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital
File formatpdf
ProvinceNorthwest Territories; Nunavut; Manitoba; Ontario; Saskatchewan
NTS54; 64; 74; 55; 65; 75; 56; 66; 76; 86; 57; 67; 77; 87
AreaTehery Lake; Wager Bay
Lat/Long WENS-120.0000 -80.0000 75.0000 55.0000
Subjectsgeneral geology; geophysics; regional geology; Science and Technology; metallogeny; sedimentary basins; aeromagnetic surveys; gravity surveys; models; Western Churchill Province; Rae Craton; Melville Peninsula; Boothia Peninsula; Somerset Island Formation; Thelon Tectonic Zone; Montresor Belt; Southampton Island; Athabasca Basin
Illustrationslocation maps; tables; magnetic maps
ProgramGEM2: Geo-mapping for Energy and Minerals
Released2022 12 19; 2022 12 20
AbstractThe geophysical data sets available for the western Churchill Province have had a bearing on the understanding of its structure, evolution and metal endowment. New data were acquired and interpreted during the Geo-mapping for Energy and Minerals (GEM) Program (2008-2020). Regional, high-resolution aeromagnetic, and targeted gravity and magnetotelluric surveys were collected in GEM, in conjunction with geological mapping projects, in order to provide control on bedrock features beneath widespread glacial overburden and flat-lying sedimentary basins. Quantitative estimates of three-dimensional geometry were obtained in key areas through geophysical models integrating the geophysical characteristics with local rock property measurements. These geophysical data sets contributed to new knowledge and interpretations in three related research fields: 1) location and nature of Rae craton’s boundaries within the western Churchill Province; 2) definition of internal Rae architecture; and 3) identification of reactivated structures controlling gold and uranium mineralization. The new data, models and emerging tectonic and metallogenic frameworks will serve as guides for future exploration in this remote, complex, challenging region.
Summary(Plain Language Summary, not published)
This chapter summarizes the gravity and magnetic modelling and interpretation results generated for parts of the Rae under the GEM I and II programs. The maps and interpretations can be used to better understand the crustal structure and mineral endowment inform and guide future exploration in this remote region.

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