Ancient continental margin assemblage in the northern Coast Mountains, southeast Alaska and northwest Canada

George E Gehrels, William C. McClelland, Scott D. Samson, P. Jonathan Patchett, Jay L. Jackson

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Geologic relations indicate that quartz-rich metasedimentary rocks in the northern Coast Mountains separate strata to the east that belong to the Stikine terrane from strata to the west of the Alexander,Wrangellia, and Taku terranes. The quartz-rich rocks structurally overlie western terranes along a mid-Cretaceous thrust fault and are overlain structurally (originally stratigraphically?) by strata of the Stikine terrace. These rocks are interpreted to be a continental margin assemblage that belongs to the Yukon Crystalline terrane. U-Pb and Nd isotopic data indicate that the metasedimentary rocks were shed from a source terrane consisting at least in part of Proterozoic rocks.

Original languageEnglish (US)
Pages (from-to)208-211
Number of pages4
JournalGeology
Volume18
Issue number3
DOIs
StatePublished - 1990

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continental margin
terrane
mountain
coast
metasedimentary rock
rock
quartz
thrust fault
terrace
Proterozoic
Cretaceous

ASJC Scopus subject areas

  • Geology

Cite this

Ancient continental margin assemblage in the northern Coast Mountains, southeast Alaska and northwest Canada. / Gehrels, George E; McClelland, William C.; Samson, Scott D.; Patchett, P. Jonathan; Jackson, Jay L.

In: Geology, Vol. 18, No. 3, 1990, p. 208-211.

Research output: Contribution to journalArticle

Gehrels, George E ; McClelland, William C. ; Samson, Scott D. ; Patchett, P. Jonathan ; Jackson, Jay L. / Ancient continental margin assemblage in the northern Coast Mountains, southeast Alaska and northwest Canada. In: Geology. 1990 ; Vol. 18, No. 3. pp. 208-211.
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