| Title | Report of activities, 2017: Dunite Peak area, Big Salmon Range, south-central Yukon: GEM2 Cordillera Project |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Parsons, A J ;
Ryan, J J; Coleman, M |
| Source | Geological Survey of Canada, Open File 8307, 2017, 10 pages, https://doi.org/10.4095/305966  Open Access |
| Image |  |
| Year | 2017 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is related to 2016 report of field
activities in the Dunite Peak area, Big Salmon Range, south central Yukon: GEM2 Cordillera Project |
| File format | pdf |
| Province | Yukon |
| NTS | 115F |
| Area | Dunite Peak; Big Salmon Range |
| Lat/Long WENS | -134.0000 -132.0000 62.0000 61.0000 |
| Subjects | regional geology; structural geology; tectonics; stratigraphy; bedrock geology; lithology; igneous rocks; ophiolites; oceanic lithosphere; intrusive rocks; gabbros; leucogabbros; volcanic rocks;
basalts; metasedimentary rocks; marbles; sedimentary rocks; cherts; limestones; clastics; metamorphic rocks; greenstones; structural features; faults, normal; faults, thrust; faults, strike-slip; structural trends; structural interpretations;
structural analyses; tectonic history; tectonic environments; tectonic setting; tectonic interpretations; deformation; accretion; crustal structure; basins; island arcs; terranes; petrogenesis; stratigraphic analyses; Canadian Cordillera; Slide
Mountain terrane; Yukon-Tanana terrane; North American Craton; Slide Mountain Ocean; Dunite Peak Ophiolite; Phanerozoic; Mesozoic; Cretaceous; Jurassic; Triassic |
| Illustrations | location maps; geoscientific sketch maps; photographs |
| Program | GEM2: Geo-mapping for Energy and Minerals Western Cordillera, Devonian and Permian structural architecture |
| Released | 2017 10 17 |
| Abstract | (Summary)
This open file report outlines the 2017 field activities conducted in the Dunite Peak area of the Big Salmon Range, south central Yukon (Figure 1), as part of the Geo-mapping for
Energy and Minerals (GEM-2) program Cordillera project. Following from 2016 field activities in the same region, targeted bedrock geological mapping and sampling was conducted to test new hypotheses and gain better understanding of the deformation
processes responsible for the tectonic assembly of the NW Cordillera and the timing of specific events during collision with and accretion to the North American craton.
The NW Cordillera is composed of multiple crustal blocks which formed
volcanic islands (island arcs) west of the North American continent between the Devonian to Jurassic periods. Prior to their accretion, these islands were separated from the continent by an intervening ocean basin; Slide Mountain Ocean (SMO) (Fig.
2). During the Triassic - Cretaceous, these blocks or 'terranes' collided with the North American continent craton to produce the NW Cordilleran mountain system. In the Dunite Peak area, remnants of oceanic rocks belonging to the SMO are preserved
structurally on top of the Yukon-Tanana terrane (YTT). The aim of this study is to characterize the structural relationships between the Slide Mountain and Yukon-Tanana terranes to better understand the early formation of the SMO and the deformation
processes that occurred during closure of this ocean, and terrane accretion to the North American continent. The results of 2017 field activities provide a clearer picture of the petrogenesis of the Dunite Peak ophiolite and allow for completion of a
geological map for the area. |
| Summary | (Plain Language Summary, not published)
This open file report outlines the 2017 field activities conducted in the Dunite Peak area of the Big Salmon Range, south central Yukon, as part of the
Geo-mapping for Energy and Minerals (GEM-2) program Cordillera project. This project aims to test new hypotheses and gain better understanding of the of how the mountainous regions of western Canada (the NW Cordillera) formed. The results of 2017
field activities with an accompanying geological map are outlined and interpreted in the context of the NW Cordillera. These results provide a clearer picture of the formation of the SMO in south central Yukon and the early deformation history of the
NW Cordillera. |
| GEOSCAN ID | 305966 |
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