| Title | Bedrock geochemistry of the central Thelon Tectonic Zone, Nunavut |
| Download | Downloads |
| Author | Whalen, J B; Berman, R G; Davis, W J; Sanborn-Barrie, M; Nadeau, L |
| Source | Geological Survey of Canada, Open File 8234, 2018, 49 pages, https://doi.org/10.4095/306385 (Open Access) |
| Year | 2018 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| File format | readme
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| File format | pdf; rtf; xls; xlsx |
| Province | Nunavut |
| NTS | 76H; 76I |
| Area | Duggan 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 |
| Subjects | regional 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 |
| Illustrations | location maps; geoscientific sketch maps; geochemical plots; ternary diagrams |
| Program | Rae Province, Chantrey-Thelon, GEM2: Geo-mapping for Energy and Minerals |
| Released | 2018 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 ID | 306385 |
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