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The origin of the Bering Sea basalt province, western Alaska

Geology of the Pacific Ocean

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Abstract

Bering Sea basalt province consists of at least 15 late Cenozoic (less than 6 Ma) volcanic fields that occur on islands in the Bering Sea and along the adjacent west coast of Alaska. The fields are composed of widespread flows of tholeiitic and alkali olivine basalt and small cones, flows, and maar craters of more alkalic basalt, basanite, and rare nephelinite. Although the volcanic fields do not lie along a hot-spot trace, the rocks are compositionally similar to ocean island basalts. Although the rocks show some evidence for fractionation, the dominant control on composition is by varying degrees of partial melting of a mantle source. Trace-element and isotopic data further constrain the mantle source.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The origin of the Bering Sea basalt province, western Alaska
Series title:
Geology of the Pacific Ocean
Volume
12
Issue:
4
Year Published:
1996
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geology of the Pacific Ocean
First page:
671
Last page:
689