Geologic framework, tectonic evolution, and displacement history of the Alexander terrane ( USA Canada).

George E Gehrels, J. B. Saleeby

Research output: Contribution to journalArticle

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Abstract

The Alexander terrane consists of upper Proterozoic(?)-Cambrian through Middle(?) Jurassic rocks that underlie much of SE Alaska and parts of E Alaska, W British Columbia, and SW Yukon Territory. A variety of geologic, paleomagnetic, and paleontologic evidence indicates that these rocks have been displaced considerable distances from their sites of origin and were not accreted to western North America until Late Cretaceous-early Tertiary time. Our geologic and U-Pb geochronologic studies in southern SE Alaska and the work of others to the N indicate that the terrane evolved through 3 distinct tectonic phases; these are discussed. -from Authors

Original languageEnglish (US)
Pages (from-to)151-173
Number of pages23
JournalTectonics
Volume6
Issue number2
Publication statusPublished - 1987
Externally publishedYes

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ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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