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TitleNew geological insights into the Carmacks Copper Cu-Au-Ag deposit, central Yukon (Yukon MINFILE 115I 008)
AuthorKovaks, N; Allan, M M; Zagorevski, AORCID logo; Milton, J E; Hart, C J R
SourceYukon Geological Survey, Yukon Exploration and Geology no. 2016, 2016 p. 117-140 Open Access logo Open Access
LinksOnline - En ligne
Alt SeriesEarth Sciences Sector, Contribution Series 20160318
PublisherYukon Geological Survey
Mediapaper; on-line; digital
File formatpdf
Lat/Long WENS-137.0000 -136.0000 62.7333 62.0000
Subjectsgeneral geology; copper; mineral deposits; mineralization; metamorphic environment; metamorphic rocks; sulphides; partial melting; bornite; chalcopyrite; Carmacks Copper deposit; Granite Mountain batholith; Jurassic
Illustrationslocation maps; geological sketch maps; photographs; photomicrographs; diagrams
ProgramGEM2: Geo-mapping for Energy and Minerals Western Cordillera, Regional porphyry transitions
Released2016 01 01
AbstractThe Carmacks Copper Cu-Au-Ag deposit is hosted in compositionally heterogeneous, foliated and folded, and variably migmatitic metamorphic rocks, which occur as elongate, NNW-trending inliers in Early Jurassic granitoid rocks of the Granite Mountain batholith. Hypogene copper mineralization is restricted to metamorphic host rocks, and occurs both as foliation-parallel chalcopyrite-dominant stringers in schistose rocks, and as net-textured bornite-chalcopyrite-dominant sulphides in the migmatitic rocks prevalent along the eastern margin of the largest metamorphic inlier. The latter style of mineralization is interpreted to originate from a sulphide melt phase generated during partial melting of a previously mineralized protolith, during emplacement of the Granite Mountain batholith.
Summary(Plain Language Summary, not published)
This report presents preliminary results and models developed through GEM2 program on volcanic and plutonic rocks in Yukon. It details the age and characteristics of magmatic rocks and associated mineralization on the basis of field and laboratory analyses. The results presented herein help progress GEM2 model to ultimately redefine the regional tectonic models of the Cordillera.

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