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TitleMiddle Cretaceous trimodal Dawson Range magmatism in western Yukon: inferences on sources and tectonic setting (NTS 115-I, -J and -K)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorZagorevski, AORCID logo; Joyce, N; Ryan, J J; Roots, C; Jicha, B
SourceGeological Survey of Canada, Open File 7561, 2014, 1 sheet, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatpdf
NTS115I/04; 115I/05; 115I/12; 115I/13; 115J; 115K/07; 115K/08; 115K/09; 115K/10; 115K/15; 115K/16
AreaDawson Range; Stevenson Ridge
Lat/Long WENS-140.5000 -137.6667 63.2500 62.5000
Subjectstectonics; structural geology; igneous and metamorphic petrology; bedrock geology; igneous rocks; ultramafic rocks; terranes; tectonic history; tectonic elements; tectonic interpretations; magmatism; metavolcanic rocks; clinopyroxenites; hornblendites; orthopyroxenites; harzburgites; dunites; structural features; Yukon-Tanana terrane; Finlayson assemblage; Buffalo Pitts peridotite; Harzburgite Peak; Mesozoic; Cretaceous
Illustrationslocation maps; photographs; plots; schematic models
ProgramGEM: Geo-mapping for Energy and Minerals Multiple Metals - NW Canadian Cordillera (Yukon, B.C.)
Released2014 01 29
Summary(Plain Language Summary, not published)
Tectonic models provide regional geoscience knowledge frameworks for understanding distribution of rock units, associated mineral deposits and duration of mineral-prospective systems. This research builds on the GEM research in Yukon. We used compiled and new data to redefine the tectonic setting of plutonic and volcanic rocks that host intrusion-related deposits (Au-Cu-Mo) in Yukon. We identified that magmas were emplaced very rapidly and had distinct sources and characteristics. This is the first time that distinct magma sources have been identified. These data provide the basis for interpretation of mineral deposits and their distribution in the Cordillera as magma characteristics are paramount to understanding the mineralizing potential of intrusion related systems. The results of this research are applicable to understanding many intrusion-related systems in Canada.

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