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TitleRevision mapping of the Yukon-Tanana and equivalent terranes in northern British Columbia and southern Yukon Territory between 131° and 132°W
AuthorRoots, C F; de Keijzer, M; Nelson, J L; Mihalynuk, M G
SourceGeological Survey of Canada, Current Research (Online) no. 2000-A4, 2000, 10 pages,
PublisherNatural Resources Canada
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in Geological Survey of Canada; Geological Survey of Canada; (2000). Current Research 2000, Geological Survey of Canada, Current Research (Online) no. 2000-ABCDE
File formatpdf
NTS105B/04SW; 105B/03NE
AreaHazel Ridge; Swift River
Lat/Long WENS-132.0000 -131.7500 60.1167 60.0000
Lat/Long WENS-131.0833 -131.0833 60.1667 60.1167
Subjectsstratigraphy; structural geology; bedrock geology; lithology; stratigraphic correlations; structural features; structural interpretations; folds; faults; depositional environment; unconformities; metavolcanic rocks; metasedimentary rocks; Yukon-Tanana Terrane; Dorsey assemblage
Illustrationssketch maps; photographs
ProgramAncient Pacific Margin NATMAP Project
Released2000 01 01
AbstractThe northern half of the Jennings River (104-O) and southern half of the Wolf Lake (105 B) map areas include multiply deformed and metamorphosed rocks of the eastern Big Salmon Complex (Yukon Tanana Terrane) and a succession of mostly Paleozoic rock assemblages whose terrane affinity is in question.
Hazel Ridge, on the west side of the area, reveals folded mafic metavolcanic rock, piedmontite chert, and marble in a series of overturned isoclinal folds. This consistent stratigraphic succession is overlain by metagreywacke on a possible unconformity.
In the northeast, siliceous gritty and mafic metavolcanic rocks of the Dorsey assemblage are intruded by orthogneiss. These are overlain on a probable detachment fault by thin mafic volcanic rock and limestone ((?)Klinkit assemblage) and by dark phyllitic rocks and quartzite (Swift River assemblage).
Both Hazel Ridge and the Dorsey assemblage contain several quartz±feldspar-phyric siliceous layers that suggest volcanogenic massive-sulphide potential.