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Title2016 report of field activities in the Dunite Peak area, Big Salmon Range, south central Yukon: GEM2 Cordillera Project
AuthorParsons, A J; Ryan, J J; Coleman, M; van Staal, C
SourceGeological Survey of Canada, Open File 8133, 2016, 9 pages, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatpdf
AreaDunite Peak; Big Salmon Range
Lat/Long WENS-134.0000 -132.0000 62.0000 61.0000
Subjectsstructural geology; tectonics; stratigraphy; faults; structural features; structural interpretations; structural analyses; tectonic history; tectonic environments; tectonic setting; tectonic interpretations; Slide Mountain terrane; Yukon-Tanana terrane; Mesozoic; Cretaceous; Jurassic; Triassic
Illustrationslocation maps; photographs
ProgramGEM2: Geo-mapping for Energy and Minerals, Western Cordillera, Redefinition of crustal blocks
Released2016 10 26
The Geo-mapping for Energy and Minerals (GEM) program is laying the foundation for sustainable economic development in the North. The Program provides modern public geoscience that will set the stage for long-term decision making related to investment in responsible resource development. Geoscience knowledge produced by GEM supports evidence-based exploration for new energy and mineral resources and enables northern communities to make informed decisions about their land, economy and society. Building upon the success of its first five-years, GEM has been renewed until 2020 to continue producing new, publically available, regional-scale geoscience knowledge in Canada's North.
During the summer 2016, GEM program has successfully produced 23 activity reports that include geological, geochemical and geophysical surveying. These activities have been undertaken in collaboration with provincial and territorial governments, northerners and their institutions, academia and the private sector. GEM will continue to work with these key collaborators as the program advances.
Summary(Plain Language Summary, not published)
This open file outlines the 2016 field activities conducted around Dunite Peak, Big Salmon Range, Yukon (Figure 1), as part of the Geo-mapping for Energy and Minerals (GEM) program. Geological mapping and sampling were conducted to understand process responsible for formation of the NW Cordillera. The NW Cordillera is composed of multiple crustal blocks which formed volcanic islands west of the North American between Devonian to Jurassic periods. These islands were separated from the continent by the Slide Mountain Ocean. During Triassic - Cretaceous periods, these islands or 'terranes' collided with North American to produce the NW Cordilleran mountain belt. In the Dunite Peak area, remnants of oceanic rocks belonging to the Slide Mountain Ocean are preserved on top of the Yukon-Tanana island arc terrane. This study will look at structural relationships between Slide Mountain and Yukon-Tanana terranes to understand the early formation of the Slide Mountain Ocean and the deformation processes that occurred during closure of this ocean and terrane collision with North American.