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Remarkable isotopic and trace element trends in potassic through sodic Cretaceous plutons of the Yukon-Koyukuk basin, Alaska, and the nature of the lithosphere beneath the Koyukuk terrane

Journal of Geophysical Research

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Abstract

We infer from the results that the northwest portion of Yukon-Koyukuk basin is underlain by a substantial continental basement of Paleozoic or greater age. This basement probably thins out to the east. There is no geochemical evidence for continental basement east of about longitude 157??, or along a belt of at least 50 km width flanking Ruby Geanticline as far to the southwest as about longitude 161??. These areas are probably underlain by oceanic and Mesozoic arc rocks. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Remarkable isotopic and trace element trends in potassic through sodic Cretaceous plutons of the Yukon-Koyukuk basin, Alaska, and the nature of the lithosphere beneath the Koyukuk terrane
Series title:
Journal of Geophysical Research
Volume
94
Issue:
B11
Year Published:
1989
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Geophysical Research