| Title | Architecture of pericratonic Yukon-Tanana terrane in the northern Cordillera |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Ryan, J J; Zagorevski, A ; Cleven, N R; Parsons, A J; Joyce, N L |
| 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. 67-93, https://doi.org/10.4095/326062  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 | Yukon |
| NTS | 95D; 105A; 105B; 105C; 105D; 105E; 105F; 105G; 105H; 105J; 105K; 105L; 105M; 115; 116B; 116C |
| Area | Dawson; Whitehorse; McQuesten; Stevenson Ridge; Klaza River; Mount Nansen; Nisling River; Thirtymile Range; Wolf Lake |
| Lat/Long WENS | -141.0000 -126.0000 65.0000 60.0000 |
| Subjects | regional geology; structural geology; stratigraphy; tectonics; geochronology; Science and Technology; Nature and Environment; tectonic history; tectonic evolution; crustal structure; crustal evolution;
crustal thickness; plate margins; terranes; craton; metamorphism; metamorphism, regional; deformation; strain; magmatism; intrusions; plutons; sutures; orogenesis; faulting; thermal history; ophiolites; bedrock geology; basement geology; lithology;
mafic rocks; ultramafic rocks; igneous rocks; intrusive rocks; peridotites; granitic rocks; volcanic rocks; metamorphic rocks; schists; amphibolite facies; metasedimentary rocks; quartzites; marbles; metavolcanic rocks; metafelsites; structural
features; faults; faults, thrust; faults, strike-slip; faults, normal; shear zones; klippen; decollement; tectonostratigraphic zones; radiometric dating; uranium lead dating; zircon dates; Canadian Cordillera; Cordilleran Orogen; Intermontane Belt;
Yukon-Tanana Terrane; North American Craton; Laurentian Margin; White River Assemblage; Scottie Creek Formation; White River Complex; Mount Baker Suite; Australia Mountain Domain; Snowcap Assemblage; Finlayson Assemblage; Simpson Range Suite;
Klondike Assemblage; Klondike Schist; Sulphur Creek Suite; Buffalo Pitts Complex; Schist Creek Complex; Slide Mountain Terrane; Moose Creek Fault; Harzburgite Peak Complex; Dunite Peak Complex; Clinton Creek Complex; Midnight Dome Complex; Wolf Lake
Complex; Inconnu Thrust; Australia Creek Fault; Willow Lake Fault; Yukon River Shear Zone; Schist Creek Fault; Denali Fault; Slide Mountain Ocean; Tintina Fault; Phanerozoic; Mesozoic; Cretaceous; Jurassic; Triassic; Paleozoic; Permian;
Carboniferous; Mississippian; Devonian; Precambrian |
| Illustrations | location maps; geoscientific sketch maps; photographs; plots; block diagrams |
| Program | GEM2: Geo-mapping for Energy and Minerals Western Cordillera |
| Released | 2021 11 25 |
| Abstract | West-central Yukon and eastern Alaska are characterized by widespread metamorphic rocks that form part of the allochthonous, composite Yukon-Tanana terrane and parautochthonous North American margin.
Structural windows through the Yukon-Tanana terrane expose parautochthonous North American margin in that broad region, particularly as mid-Cretaceous extensional core complexes. Both the Yukon-Tanana terrane and parautochthonous North American
margin share the same Late Devonian history, making their discrimination difficult; however, distinct post-Late Devonian magmatic and metamorphic histories assist in discriminating Yukon-Tanana terrane from parautochthonous North American margin
rocks. The suture between Yukon-Tanana terrane and parautochthonous North American margin is obscured by many episodes of high-strain deformation. Their main bounding structure is probably a Jurassic to Cretaceous thrust, which has been locally
reactivated as a mid-Cretaceous extensional shear zone. Crustal-scale structures within composite Yukon-Tanana terrane (e.g. the Yukon River shear zone) are commonly marked by discontinuous mafic-ultramafic complexes. Some of these complexes
represent orogenic peridotites that were structurally exhumed into the Yukon-Tanana terrane in the Middle Permian. |
| Summary | (Plain Language Summary, not published)
This Bulletin presents highlights of the research on the Yukon-Tanana terrane carried out under the auspices of the Cordillera project, Geo-mapping for
Energy and Minerals program. This work focused on establishing age constraints on the internal components and major tectonic boundaries within and between the Yukon-Tanana terrane and the North American craton. This contribution puts into perspective
the large amount of analytical data collected during the Cordillera project, and presents a simple tectonic model of the structural relationship between the Yukon-Tanana terrane and the North American craton. |
| GEOSCAN ID | 326062 |
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