| Title | Character and metallogeny of Permian, Jurassic and Cretaceous plutons in the southern Yukon-Tanana Terrane |
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| Author | Liverton, T; Mortensen, J K; Roots, C F |
| Source | Yukon 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 |
| Links | Online - En ligne
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| Image |  |
| Year | 2004 |
| Alt Series | Earth Sciences Sector, Contribution Series 2004286 |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | British Columbia; Yukon |
| NTS | 104I; 104J; 104O; 104P; 105A; 105B; 105C; 105D; 105E; 105F; 105G; 105H |
| Area | Whitehorse; Cassier Fault |
| Lat/Long WENS | -136.0000 -128.0000 62.0000 58.0000 |
| Subjects | minerals; 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; Geochronology; Permian; Jurassic; Cretaceous |
| Illustrations | location maps; graphs; tables; Concordia diagrams |
| Program | Ancient Pacific Margin NATMAP Project |
| Program | NSERC Natural Sciences and Engineering Research Council of
Canada |
| Program | Consolidating Canada's Geoscience Knowledge |
| Released | 2004 01 01 |
| Abstract | Between 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 ID | 216694 |
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