Geology of the western flank of the Coast Mountains between Cape Fanshaw and Taku Inlet, southeastern Alaska

George E Gehrels, W. C. McClelland, S. D. Samson, P. J. Patchett, M. J. Orchard

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

The western flank of the Coast Mountains batholith between Cape Fanshaw and Taku Inlet is underlain primarily by Jura-Cretaceous strata of the Gravina belt; pre-Permian(?); Permian, and Triassic strata of the Taku terrane, and mid-Proterozoic(?) to upper Paleozoic rocks of continental margin affinity. It is suggested that these three assemblages are correlative with components of the Yukon-Tanana terrane, which underlies a large region of Yukon and eastern Alaska. The continental margin rocks in the northern Coast Mountains may be part of the in situ North American margin that has been overthrust by the Stikine and adjacent terranes. Alernatively, these rocks may have 1) rifted from and then returned to the North American margin, 2) moved >800 km along left-lateral or right-lateral faults from elsewhere along the North American margin, or 3) originated near a continent other than North America. -from Authors

Original languageEnglish (US)
Pages (from-to)567-585
Number of pages19
JournalTectonics
Volume11
Issue number3
StatePublished - 1992
Externally publishedYes

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Geology
geology
coasts
mountains
Coastal zones
terrane
margins
Rocks
rocks
continental shelves
strata
mountain
continental margin
coast
Permian
rock
continents
batholith
affinity
Proterozoic

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Gehrels, G. E., McClelland, W. C., Samson, S. D., Patchett, P. J., & Orchard, M. J. (1992). Geology of the western flank of the Coast Mountains between Cape Fanshaw and Taku Inlet, southeastern Alaska. Tectonics, 11(3), 567-585.

Geology of the western flank of the Coast Mountains between Cape Fanshaw and Taku Inlet, southeastern Alaska. / Gehrels, George E; McClelland, W. C.; Samson, S. D.; Patchett, P. J.; Orchard, M. J.

In: Tectonics, Vol. 11, No. 3, 1992, p. 567-585.

Research output: Contribution to journalArticle

Gehrels, GE, McClelland, WC, Samson, SD, Patchett, PJ & Orchard, MJ 1992, 'Geology of the western flank of the Coast Mountains between Cape Fanshaw and Taku Inlet, southeastern Alaska', Tectonics, vol. 11, no. 3, pp. 567-585.
Gehrels, George E ; McClelland, W. C. ; Samson, S. D. ; Patchett, P. J. ; Orchard, M. J. / Geology of the western flank of the Coast Mountains between Cape Fanshaw and Taku Inlet, southeastern Alaska. In: Tectonics. 1992 ; Vol. 11, No. 3. pp. 567-585.
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