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Rapid formation of Ontong Java Plateau by Aptian mantle plume volcanism

Science

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, , , , , , , , and

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Abstract

The timing of flood basalt volcanism associated with formation of the Ontong Java Plateau (OJP) is estimated from paleomagnetic and paleontologic data. Much of OJP formed rapidly in less than 3 million years during the early Aptian, at the beginning of the Cretaceous Normal Polarity Superchron. Crustal emplacement rates are inferred to have been several times those of the Deccan Traps. These estimates are consistent with an origin of the OJP by impingement at the base of the oceanic lithosphere by the head of a large mantle plume. Formation of the OJP may have led to a rise in sea level that induced global oceanic anoxia. Carbon dioxide emissions likely contributed to the mid-Cretaceous greenhouse climate but did not provoke major biologic extinctions.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Rapid formation of Ontong Java Plateau by Aptian mantle plume volcanism
Series title:
Science
Volume
254
Issue:
5030
Year Published:
1991
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
399
Last page:
403