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THE MAGELLAN SEAMOUNTS - EARLY CRETACEOUS RECORD OF THE SOUTH-PACIFIC ISOTOPIC AND THERMAL ANOMALY

Abstract:

We present geophysical, geochemical, and geochronological data from two Early Cretaceous seamounts in the western Pacific Ocean which formed at melt sources in what is now French Polynesia. One seamount has an 40Ar/39Ar mineral age of 119.6 (±0.6, 1 σ) Ma, is flexurally compensated with an elastic plate thickness Te of 10 (±2) km, and is isotopically similar to the island of Mangaia, or toward the HIMU mantle end-member. The second has an age of 100.1 (±0.5, 1 σ) Ma, is compensated with a Te ...

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Publication status:
Published

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Publisher copy:
10.1029/JB094iB08p10501

Authors


Journal:
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS
Volume:
94
Issue:
B8
Pages:
10501-10523
Publication date:
1989-08-10
DOI:
ISSN:
0148-0227
URN:
uuid:e7631c5a-5784-403d-86d8-91b56cddf371
Source identifiers:
201533
Local pid:
pubs:201533
Language:
English

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