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TitleCharacter and metallogeny of Permian, Jurassic and Cretaceous plutons in the southern Yukon-Tanana Terrane
AuthorLiverton, T; Mortensen, J K; Roots, C F
SourceYukon Exploration and Geology 2004; by Emond, D S (ed.); Lewis, L L (ed.); Bradshaw, G D (ed.); Yukon Geology Program, Yukon Exploration and Geology 2004, 2004 p. 147-165 Open Access logo Open Access
LinksOnline - En ligne
Image
Year2004
Alt SeriesEarth Sciences Sector, Contribution Series 2004286
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceBritish Columbia; Yukon
NTS104I; 104J; 104O; 104P; 105A; 105B; 105C; 105D; 105E; 105F; 105G; 105H
AreaWhitehorse; Cassier Fault
Lat/Long WENS-136.0000 -128.0000 62.0000 58.0000
Subjectsminerals; granites; ultramafic rocks; intrusions; plutons; continental margins; granodiorites; gabbros; strontium; titanium; magmatic arcs; peraluminous rocks; orogenies; hydrothermal systems; Swift River; Nisutlin River; Dorsey Complex; Ram Stock; Cassiar Platform; mineral geology; geochronology; isotopic dating; Permian; Jurassic; Cretaceous
Illustrationslocation maps; graphs; tables; Concordia diagrams
ProgramAncient Pacific Margin NATMAP Project
ProgramNSERC Natural Sciences and Engineering Research Council of Canada
AbstractBetween the Swift and Nisutlin rivers, unmetamorphosed granite to ultramafic intrusions of four ages (from Permian through Cretaceous) span the amalgamation of Cassiar Platform with Yukon-Tanana and Cache Creek terranes. The mid-Permian granitic Ram Stock and two plutons cutting the Sylvester Allochthon lie at the edge of the Dorsey Complex, a remnant of an ancient passive margin succession that underlies the volcanic arcs of Yukon-Tanana Terrane. Middle Jurassic, locally foliated granodiorite to gabbro intrusions are etaluminous, and high in Sr and low in Ti compared to the Cretaceous suite. These 'I-type' volcanic arc plutons may be the remnants of an overlapping arc correlative with the Quesnel Terrane. The Cretaceous (113 to 98 Ma) meta- to peraluminous granites are late orogenic incipient 'A-type' plutons from highly fractionated F- and Cl-rich magmas. These generated extensive hydrothermal systems that produced tin, tungsten, molybdenum and beryl occurrences.
GEOSCAN ID216694

 
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