| Title | Overview of Cordilleran oceanic terranes and their significance for the tectonic evolution of the northern Cordillera |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Zagorevski, A ;
van Staal, C R; Bédard, J H; Bogatu, A; Canil, D; Coleman, M;
Golding, M; Joyce, N L; Lawley, C; McGoldrick, S; Mihalynuk, M G; Milidragovic, D; Parsons, A; Schiarizza, P |
| Source | Northern Cordillera geology: a synthesis of research from the Geo-mapping for Energy and Minerals program, British Columbia and Yukon; by Ryan, J J (ed.); Zagorevski, A (ed.); Geological Survey of Canada, Bulletin 610, 2021 p. 21-65, https://doi.org/10.4095/326053  Open Access |
| Year | 2021 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Northern Cordillera
geology: a synthesis of research from the Geo-mapping for Energy and Minerals program, British Columbia and Yukon |
| Related | NRCan photo(s) in this publication |
| File format | pdf |
| Province | British Columbia; Yukon |
| NTS | 104F/09; 104F/15; 104F/16; 104G/09; 104G/10; 104G/11; 104G/12; 104G/13; 104G/14; 104G/15; 104G/16; 104H/11; 104H/12; 104H/13; 104H/14; 104I/03; 104I/04; 104I/05; 104I/06; 104I/11; 104I/12; 104I/13; 104I/14;
104J; 104K; 104L; 104M; 104N; 104O; 104P/04; 104P/15; 105B/03; 105B/04; 105B/05; 105B/06; 105B/12; 105C; 105D; 105E; 105F/01; 105F/02; 105F/03; 105F/04; 105F/05; 105F/06; 105F/07; 105F/11; 105F/12; 105F/13; 105F/14; 105K/04; 105L/01; 105L/02;
105L/03; 105L/04; 105L/05; 105L/06; 105L/07; 105L/08; 115A/01; 115A/08; 115A/09; 115A/10; 115A/15; 115A/16; 115G/09; 115G/15; 115G/16; 115H; 115I/01; 115I/02; 115I/03; 115I/04; 115I/05; 115I/06; 115I/07; 115I/08; 115J/01; 115J/02; 115J/07;
115J/08 |
| Area | Whitehorse; Carcross; Atlin; Teslin; Dease Lake |
| Lat/Long WENS | -138.6667 -129.0000 62.5000 57.5000 |
| Subjects | tectonics; regional geology; structural geology; stratigraphy; geochemistry; Science and Technology; Nature and Environment; tectonic setting; tectonic evolution; tectonic history; crustal evolution;
crustal structure; models; ophiolites; island arcs; terranes; mantle; oceanic crust; craton; plate margins; orogenesis; subduction zones; obduction; magmatism; intrusions; plutons; dykes; volcanism; accretion; rifting; sea floor spreading;
deformation; sutures; stratigraphic analyses; stratigraphic nomenclature; tectonostratigraphic zones; bedrock geology; basement geology; lithology; breccias; igneous rocks; ultramafic rocks; intrusive rocks; diabases; dunites; gabbros; norites; mafic
intrusive rocks; harzburgites; pyroxenites; trondhjemites; peridotites; volcanic rocks; basalts; pillow lavas; tholeiites; sedimentary rocks; carbonates; limestones; cherts; metamorphic rocks; marbles; tectonites; serpentinites; structural features;
faults; geochemical analyses; trace element analyses; fossils; paleogeography; microfossils; Canadian Cordillera; Intermontane Belt; Laurentian Margin; Cache Creek Terrane; Atlin Terrane; Stikinia Terrane; Yukon-Tanana Terrane; Slide Mountain
Terrane; Ancestral North America; Nakina Suite; Dozy Marmot Suite; King Mountain Suite; Nakina Formation; Kutcho Complex; Kutcho Assemblage; Kutcho Formation; Stikine Assemblage; Horsefeed Formation; French Range Formation; Teslin Formation; Three
Sisters Plutonic Suite; Hazelton Group; Takwahoni Formation; Laberge Group; Inklin Formation; Nazcha Formation; Sinwa Formation; Stuhini Group; Lewes River Group; Kedahda Formation; Aksala Formation; Hancock Member; Shonektaw Formation; Tahltanian
Orogeny; Joe Mountain Formation; Tsabayhe Group; Fusulinids; Nahlin Fault; King Salmon Fault; Harzburgite Peak Complex; Clinton Creek Complex; Midnight Dome Complex; Dunite Peak Complex; Cache Creek Complex; Nahlin Suite; Phanerozoic; Mesozoic;
Jurassic; Triassic; Paleozoic; Permian; Carboniferous; Mississippian |
| Illustrations | geoscientific sketch maps; location maps; stratigraphic charts; schematic models; photographs; geochemical plots; ternary diagrams; schematic cross-sections |
| Program | GEM2: Geo-mapping for Energy and Minerals Western Cordillera |
| Released | 2021 11 25 |
| Abstract | Ophiolite complexes are an important component of oceanic terranes in the northern Cordillera and constitute a significant amount of juvenile crust added to the Mesozoic Laurentian continental margin
during Cordilleran orogenesis. Despite their tectonic importance, few systematic studies of these complexes have been conducted. Detailed studies of the pseudostratigraphy, age, geochemistry, and structural setting of ophiolitic rocks in the northern
Cordillera indicate that ophiolites formed in Permian to Middle Triassic suprasubduction zone settings and were obducted onto passive margin sequences. Re-evaluation of ophiolite complexes highlights fundamental gaps in the understanding of the
tectonic framework of the northern Cordillera. The previous inclusion of ophiolite complexes into generic 'oceanic' terranes resulted in significant challenges for stratigraphic nomenclature, led to incorrect terrane definitions, and resulted in
flawed tectonic reconstructions. |
| Summary | (Plain Language Summary, not published)
This report presents preliminary results and models developed through GEM2 program on the ancient oceanic crust in British Columbia and Yukon. It details
the distribution and characteristics of the various rock packages on the basis of field and laboratory analyses. It compares these data to modern analogues. The results presented herein help progress GEM2 model to ultimately redefine the regional
tectonic models of the Cordillera. |
| GEOSCAN ID | 326053 |
|
|