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TitleBedrock geochemistry of the central Thelon Tectonic Zone, Nunavut
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AuthorWhalen, J B; Berman, R G; Davis, W J; Sanborn-Barrie, M; Nadeau, L
SourceGeological Survey of Canada, Open File 8234, 2018, 49 pages, https://doi.org/10.4095/306385
Year2018
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatreadme
File formatpdf; rtf; xls; xlsx
ProvinceNunavut
NTS76H; 76I
AreaDuggan Lake; Overby Lake; Queen Maud Migratory Bird Sanctuary; Ellice River; Thelon Wildlife Sanctuary; Back River
Lat/Long WENS-106.0000 -104.0000 67.0000 65.0000
Subjectsregional geology; geochemistry; tectonics; geophysics; bedrock geology; basement geology; lithology; igneous rocks; plutonic rocks; leucogranites; garnet; diorites; granodiorites; monzo-granites; granitic rocks; zirconium; potassium; megacrystic granodiorites; monzo-granites; gabbros; tonalites; trondhjemites; migmatites; volcanic rocks; metasedimentary rocks; metapsammites; metamorphic rocks; charnockites; diatexites; amphibolites; gneisses; sedimentary rocks; sandstones; conglomerates; psammites; pelites; carbonates; greywackes; spectroscopic analyses; trace element analyses; major element analyses; tectonic setting; tectonic evolution; magmatism; intrusions; plutons; models; plate margins; subduction; geophysical interpretations; magnetic interpretations; Archean; Thelon Tectonic Zone; Slave Craton; Rae craton; Queen Maud block; Yellowknife Supergroup; Overby Lake Domain; Duggan Lake Domain; Bathurst Fault; Ellice River Domain; Ellice River Formation; Taltson Magmatic Zone; MacDonald Fault; inductively coupled plasma mass spectroscopy (ICPMS); large-ion-lithophile elements (LILE); light rare earth elements (LREE); heavy rare earth elements (HREE); geochemical signatures; magmatic signatures; slab failures; arcs; convergent margin; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; geochemical plots; ternary diagrams
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Location
 
Natural Resources Canada Library - Ottawa (Earth Sciences)
 
ProgramRae Province, Chantrey-Thelon, GEM2: Geo-mapping for Energy and Minerals
Released2018 01 24
Summary(Plain Language Summary, not published)
The Chantrey-Thelon activity was initiated to help attract mineral exploration to this underexplored region of Nunavut by defining its tectonic evolution and crustal architecture. This report presents the first bedrock geochemical data for plutonic and volcanic rocks of the Thelon tectonic zone. The results strongly point to plutonic rock genesis at ca. 2.0 Ga in a convergent plate tectonic setting involving either subduction or slab failure or both. A syn-collisional origin is indicated for ca. 1.9 Ga leucogranites that form a fundamental boundary on the western margin of Mesoarchean crust of the Rae craton. Comparison with published geochemical data for the Taltson magmatic zone south of the MacDonald fault call into question its long-standing correlation with the Thelon tectonic zone.
GEOSCAN ID306385