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Review of radiometric data from the Yukon crystalline terrane, Alaska and Yukon Territory.

Canadian Journal of Earth Sciences

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Abstract

The results of > 20 yr of geochronological studies in the Yukon crystalline terrain of east-central Alaska and W Yukon Territory suggest at least six igneous and thermal (metamorphic?) events. Plutonism during Mississippian, early Jurassic, mid-Cretaceous, late Cretaceous and early Tertiary times is indicated. Evidence also indicates that Mississippian, early Jurassic, late early-Cretaceous, and late Cretaceous thermal (metamorphic?) events have affected parts of the terrain. The western part was affected by a significant regional metamorphic event in late early-Cretaceous time, followed by a terrain-wide mid-Cretaceous plutonic event. The pattern of K/Ar ages allows division of the terrain into domains, bounded by NE-trending lineaments. The K/Ar ages (204) are tabulated, with K/Ar ages of 10 mineral pairs.-P.Br.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Review of radiometric data from the Yukon crystalline terrane, Alaska and Yukon Territory.
Series title:
Canadian Journal of Earth Sciences
Volume
22
Issue:
4
Year Published:
1985
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Canadian Journal of Earth Sciences
First page:
525
Last page:
537