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

Canadian Journal of Earth Sciences
By: , and 

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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