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TitleReport of activities for the geology and mineral potential of the Chantrey-Thelon area: GEM-2 Thelon tectonic zone, Montresor belt and Elu basin projects
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AuthorBerman, R G; Davis, W J; Whalen, J B; McCurdy, M W; Craven, J A; Roberts, B J; McMartin, I; Percival, J A; Rainbird, R H; Ielpi, A; Mitchell, R; Sanborn-Barrie, M; Nadeau, L; Girard, É; Carr, S; Pehrsson, S J
SourceGeological Survey of Canada, Open File 7964, 2015, 19 pages, https://doi.org/10.4095/297302
Year2015
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatpdf
ProvinceNunavut
NTS76G; 76H; 76I; 76J; 76O; 66H/14; 66H/15; 66I/01; 66I/02; 66I/03; 66I/06; 66I/07
AreaBack River; Ellice River; Montresor River; Elu Inlet; Tariyunnuaq; Melville Sound; Kiluhiqtuk; Bathurst Inlet
Lat/Long WENS-108.0000 -104.0000 67.0000 65.0000
Lat/Long WENS-97.5833 -96.3333 66.5000 65.9167
Lat/Long WENS-108.0000 -106.0000 68.0000 67.0000
Subjectsstratigraphy; geophysics; structural geology; geochemistry; bedrock geology; analytical methods; glacial deposits; structural interpretations; mineral potential; geophysical interpretations; magnetic anomalies; magnetotelluric interpretations; Thelon Tectonic Zone; Queen Maud block; Rae craton; Slave Province; Elu Basin; Precambrian; Proterozoic
Illustrationslocation maps; photographs; plots
ProgramRae Province, Chantrey-Thelon, GEM2: Geo-mapping for Energy and Minerals
Released2015 11 20
Abstract(Summary)
The GEM2 Chantrey-Thelon activity has initiated bedrock mapping and related surficial, geochemical and geophysical studies in and adjacent to the boundary region of two major parts of the Canadian shield in western Nunavut. The objective of this activity is to promote mineral exploration in this understudied area through improved understanding its geologic evolution, crustal structure, and potential exploration targets. This report summarizes laboratory results on samples collected during 2014 fieldwork in the Thelon tectonic zone and Montresor belt projects, as well as the results of 2015 fieldwork in the Elu basin project.
Summary(Plain Language Summary, not published)
2014-2015 work in the Chantrey-Thelon activity includes: Geochronology has revealed (a) a new age (1.95 Ga) of sedimentation and volcanism associated with base metal and silver anomalies in stream sediments; (b) the Mesoarchean age of a crustal block in the western Rae craton); (c) young 1.93-1.89 Ga plutonism with different geochemical signatures, in part coincident with regional high grade metamorphism. 3-D magnetotelluric models of this complex zone are being tested and refined. Stream sediment data indicate economic potential in base metals, silver, and uranium. A >110 Myr depositional gap has been found in the Montresor group. Contrasting metamorphic grade reflects extensional faulting. A breccia zone sample shows elevated Cu, Ag, Au values. Fieldwork in the Elu basin indicates elevated uranium in weathered granitoid basement, basement paleovalleys of the Burnside formation and along intrabasin-fill surfaces at higher stratigraphic levels.
GEOSCAN ID297302