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TitleConstraints on the age of the Klinkit assemblage east of Teslin Lake, northern British Columbia
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AuthorRoots, C F; Harms, T A; Simard, R -L; Orchard, M J; Heaman, L
SourceGeological Survey of Canada, Current Research (Online) no. 2002-A7, 2002, 11 pages, https://doi.org/10.4095/213072
Year2002
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediapaper; on-line; digital
RelatedThis publication is contained in Geological Survey of Canada; Geological Survey of Canada; (2002). Current Research 2002, winter release, Geological Survey of Canada, Current Research no. 2002
File formatpdf
ProvinceBritish Columbia
NTS104O/11
AreaTeslin Lake
Lat/Long WENS-132.0000 -131.0000 59.7500 59.5000
Subjectsgeochronology; stratigraphy; regional geology; bedrock geology; volcaniclastics; sedimentary rocks; uranium lead dating; limestones; conodonts; diorites; gabbros; tuffs; andesites; sills; volcanic rocks; Klinkit Assemblage; Screw Creek Limestone; Swift River Succession; Big Salmon Complex; Teh Clastics; Carboniferous; Triassic; Paleozoic; Permian; Mesozoic
Illustrationstables; sketch maps
ProgramAncient Pacific Margin NATMAP Project
Image
Released2002 01 22
AbstractVolcaniclastic and overlying dark sedimentary rocks of the Klinkit assemblage (NTS 104-O/11) are the youngest of several arc remnants that lie between the Cassiar Platform and Cache Creek terrane in the British Columbia-Yukon border area. New U-Pb geochronological and micropaleontological data indicate Late Carboniferous (or younger) to Late Triassic age for the assemblage. Limestone at the base of the Klinkit assemblage contains Bashkirian conodonts. Intrusive rocks, more deformed than the Klinkit assemblage, are ca. 340 Ma and ca. 320 Ma. A tuff, probably correlative with the Klinkit assemblage, yielded an Early Permian (ca. 281 Ma) date. Middle to Late Triassic conodonts were recovered from the argillaceous upper unit. We conclude that Klinkit volcanism, begun in the Late Carboniferous, continued through Permian time and was followed by Triassic clastic sedimentation. Correlative late Paleozoic volcanic centres and Triassic sedimentary rocks in the pericratonic belt are found in central Yukon and north-central British Columbia.
GEOSCAN ID213072