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TitleReport of activities, 2017, for Yukon tectonic evolution - late Mesozoic to Tertiary: GEM2 Cordillera Project
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorKellett, D AORCID logo; Ryan, J J; Zagorevski, AORCID logo; Colpron, M; Joyce, N; Zwingmann, H; Kislitsyn, R
SourceGeological Survey of Canada, Open File 8306, 2017, 14 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is related to Syn-magmatic deformation and structural relationships within Jurassic granitoid rocks of the Aishihik batholith, Yukon: 2015 report of activities for GEM-2 Cordillera Project
File formatpdf
ProvinceYukon; British Columbia
NTS104J; 104K; 104L; 104M; 104N; 104O; 105B; 105C; 105D; 105E; 105F; 105G; 105L; 115A; 115G; 115H; 115I; 115J
AreaWhitehorse; Atlin Lake
Lat/Long WENS-139.5000 -130.0000 65.0000 58.5000
Subjectstectonics; structural geology; geochronology; tectonic evolution; crustal evolution; terranes; sedimentary basins; fluid flow; bedrock geology; structural features; faults; thermal history; temperature; radiometric dating; argon argon dating; muscovite; potassium argon dating; uranium lead dating; zircon; apatite; fission-track dates; mineralization; x-ray diffraction analyses; clays; structural trends; Canadian Cordillera; Intermontane Belt; Whitehorse Trough; Laberge Group; Cache Creek Terrane; Stikine Terrane; Quesnel Terrane; Yukon-Tanana Terrane; Slide Mountain Terrane; Minto Deposit; Tantalus Formation; Sinwa Formation; Aksala Formation; Lewis River Group; King Salmon Thrust Fault; Llewellyn Fault; Nahlin Fault; Phanerozoic; Cenozoic; Tertiary; Mesozoic; Cretaceous; Jurassic
Illustrationslocation maps; geoscientific sketch maps; plots
ProgramGEM2: Geo-mapping for Energy and Minerals Western Cordillera, Yukon Tectonic Evolution - late Mesozoic to Tertiary
Released2017 10 05
Summary(Plain Language Summary, not published)
Distinct rock assemblages (terranes) of Devonian to Triassic age were accreted to the northern Cordillera during Early Jurassic, including significant mineral deposits. However, these terranes have been displaced significantly since the Early Jurassic. The upper crustal processes that modified these mineral-endowed terranes are poorly understood, yet are critical for controlling the setting of formation, and subsequent translation of base metal mineralization. This GEM2 research activity is designed to address this gap in our knowledge of the Cordillera by focusing on the upper crustal processes that occurred from the Early Jurassic. To achieve this goal, we are applying low temperature (<400 °C) thermochronology methods including Ar/Ar, K/Ar, U-Th/He and fission track dating. This report outlines 2017 progress in understanding these syn- to post-accretion geological processes, including formation of sedimentary basins, differential exhumation, fluid events and translation of terranes along faults.

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