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TitleUpdate on bedrock geological mapping of the Yukon-Tanana terrane, southern Stewart River map area, Yukon Territory
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AuthorRyan, J J; Gordey, S P; Glombick, P; Piercey, S J; Villeneuve, M E
SourceGeological Survey of Canada, Current Research (Online) no. 2003-A9, 2003, 7 pages, https://doi.org/10.4095/214026
Year2003
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in the following publications
File formatpdf
ProvinceYukon
NTS116N; 116O
AreaStewart River; Whitehorse; Dawson; Watson Lake
Lat/Long WENS-141.0000 -138.0000 68.0000 67.0000
Subjectsregional geology; bedrock geology; metamorphic rocks; schists; gneisses; amphibolite facies; metamorphism; metasedimentary rocks; marbles; orthogneisses; amphibolites; granites; rhyolites; plutons; Yukon-Tanana terrane; Carmacks Group; Paleozoic
Illustrationssketch maps
ProgramAncient Pacific Margin NATMAP Project
ProgramLithoprobe
Image
Released2003 01 23
AbstractThe Yukon to mafic composition interdigitates with, and lies structurally (and possibly stratigraphically) above, the metaclastic rocks. Extensive orthogneiss (including augen granite) intrudes both. The orthogneiss and amphibolite formed the subvolcanic root and volcanic cover, respectively, of a Devono-Mississippian island arc. These rocks served in turn as basement to a Permian magmatic arc, manifested as the Klondike schist and related plutons. A co-magmatic Permian orogeny resulted in extensive transposition and metamorphism of the mid- and late Paleozoic rocks. The Lucky Joe Cu-Au occurrence, of recent interest in the area, occurs generally within the complex, possibly structurally modified interface between metaclastic and amphibolite successions.
GEOSCAN ID214026