|Title||Revision mapping of the Yukon-Tanana and equivalent terranes in northern British Columbia and southern Yukon Territory between 131° and 132°W|
|Author||Roots, C F; de Keijzer, M; Nelson, J L; Mihalynuk, M G|
|Source||Geological Survey of Canada, Current Research (Online) no. 2000-A4, 2000, 10 pages, https://doi.org/10.4095/211130|
|Publisher||Natural Resources Canada|
|Media||on-line; digital; CD-ROM|
|Related||This 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 |
|Area||Hazel 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|
|Subjects||stratigraphy; 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|
|Illustrations||sketch maps; photographs|
|Program||Ancient Pacific Margin NATMAP Project|
|Released||2000 01 01|
|Abstract||The 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.