U-Pb zircon geochronology of Lower Jurassic and Paleozoic Stikinian strata and Tertiary intrusions, northwestern British Columbia

C. J. Greig, G. E. Gehrels

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

New U-Pb zircon ages are reported from western Stikinia. Devonian and Pennsylvanian ages of volcanic rocks at Oweegee dome confirm the presence of pre-Permian strata, and with Paleozoic and Triassic detrital zircons from Lower Jurassic sandstone, they help to demonstrate pre-Lower Jurassic deformation and uplift. The absence of pre-Paleozoic inherited zircon from all samples is consistent with Nd-Sr isotopic data which suggest that Stikinia consists mainly of juvenile crust. U-Pb ages for posttectonic intrusions suggest that structures in Skeena Fold Belt in the Kinskuch area formed prior to Eocene time. Five ages for felsic volcanic rocks suggest near-contemporaneity for cessation of volcanism in the areas studied. -from Authors

Original languageEnglish (US)
Pages (from-to)1155-1171
Number of pages17
JournalCanadian Journal of Earth Sciences
Volume32
Issue number8
DOIs
StatePublished - Jan 1 1995
Externally publishedYes

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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