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TitleYukon tectonic evolution - late Mesozoic to Tertiary: GEM-2 Cordillera Project, report of activities 2018
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorKellett, D AORCID logo; Mottram, C; Banjan, M; Coutand, I; Friend, M
SourceGeological Survey of Canada, Open File 8470, 2018, 14 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
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; Dawson
Lat/Long WENS-139.5000 -130.0000 65.0000 58.5000
Subjectstectonics; structural geology; geochronology; tectonic evolution; crustal evolution; terranes; orogenies; accretion; plate margins; plate motions; crustal movements; thermal history; intrusions; plutons; kinematic analysis; structural analyses; geometric analyses; bedrock geology; structural features; faults; faults, normal; faults, thrust; faults, strike-slip; fractures; lithology; igneous rocks; intrusive rocks; granodiorites; granitic rocks; metamorphic rocks; metasedimentary rocks; clays; calcite; radiometric dating; potassium argon dating; uranium lead dating; argon argon dating; fission-track dates; stocks; diatremes; Paleogene; Canadian Cordillera; Intermontane Belt; Stikine Terrane; Quesnel Terrane; Cache Creek Terrane; Yukon-Tanana Terrane; Whitehorse Trough; Big Creek Fault; Nucleus Mining Camp; Revenue Mining Camp; Casino Suite; Stoddard Pluton; Long Lake Suite; Big Creek Pluton; Simpson Range Suite; Snowcap Metasediments; Phanerozoic; Cenozoic; Tertiary; Mesozoic; Cretaceous; Jurassic; Paleozoic; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; photographs; stereonets; plots
ProgramGEM2: Geo-mapping for Energy and Minerals Western Cordillera, Yukon Tectonic Evolution - late Mesozoic to Tertiary
Released2018 10 31
In this research activity, we will attempt to determine the timing and direction of motion for faults, major breaks in the Earth's crust, that formed during the Jurassic to Paleogene periods (~200-20 million years ago) in the central portion of the Canadian Cordillera mountain belt. To do this, we will use three different methods: compare the temperature-time history of rock packages on either side of a fault, date fault-generated clay, and date fault-generated calcite fibres. The results will allow us to reconstruct the fault motion, and see the pre-fault geometry of the major rock assemblages in southern Yukon and northernmost British Columbia.
Summary(Plain Language Summary, not published)
This activity report summarizes the field and analytical progress for the Yukon Tectonic Evolution activity of the GEM Cordillera project. We present the locations of samples collected during the 2018 field season, and present some of the corresponding field observations. We also present new detrital zircon U-Pb data for three samples.

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