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TitleAge of magmatism and mineralization at the Star (Sheslay, Copper Creek) copper porphyry prospect: inception of the Late Triassic mineralized arc
AuthorMihalynuk, M G; Zagorevski, AORCID logo; Joyce, N LORCID logo; Creaser, R A
SourceBritish Columbia Ministry of Energy, Mines and Petroleum Resources, Paper 2016-1, 2016 p. 65-75 Open Access logo Open Access
LinksOnline - En ligne
Alt SeriesEarth Sciences Sector, Contribution Series 20150456
PublisherBritish Columbia Ministry of Energy and Mines
File formatpdf
ProvinceBritish Columbia
Lat/Long WENS-135.0000 -111.0000 60.0000 48.0000
Subjectsigneous and metamorphic petrology; geochronology; magmatism; magmatic rocks; mineralization; gold; copper; molybdenum; silver; porphyries; uranium lead dating; radiometric dating; Star copper porphyry prospect; Sheslay copper porphyry prospect; Copper Creek copper porphyry prospect; Mesozoic; Triassic
Illustrationslocation maps; photographs
ProgramGEM2: Geo-mapping for Energy and Minerals Western Cordillera, Regional porphyry transitions
Released2016 01 01
AbstractCu-Mo porphyry style mineralization in the vicinity of the Star prospect was likely discovered during construction of the Telegraph Trail in the early 1900's, but it was probably not until circa 1976 that the main Dick Creek zone was discovered. All mineralization has been attributed to the ~20 km2 Kaketsa pluton, ~226 Ma, and related satellite intrusions. Affiliation is borne out by the age of magmatism and mineralization at the main Dick Creek zone as determined by U-Pb zircon and Re-Os geochronology: 229 ± 3 Ma and 227.2 ±1.0 Ma. Cu-Mo calc-alkalic style porphyry mineralization of this age is not common in the Canadian Cordillera, but Star mineralization broadly similar in style to the huge Schaft Creek deposit (~222 Ma). However, the Dick Creek zone is significantly older than Schaft Creek, and is perhaps the oldest well-dated Triassic porphyry mineralization in the Canadian Cordillera. It marks inception of porphyry mineralization in Late Triassic arc
Summary(Plain Language Summary, not published)
This report presents preliminary results and models developed through GEM2 program on volcanic and plutonic rocks in British Columbia. 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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