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OXYGEN THERMOBAROMETRY OF ABYSSAL SPINEL PERIDOTITES - THE REDOX STATE AND C-O-H VOLATILE COMPOSITION OF THE EARTHS SUB-OCEANIC UPPER MANTLE

Abstract:
We have applied the spinel peridotite oxygen barometer to abyssal spinel peridotites from the mid-Atlantic, central Indian, southwest Indian and American-Antarctic ocean ridge systems. The results indicate that the oxygen fugacity (fO2) of the suboceanic mantle is on average 0.9 ± 0.7 (n = 33; ± 1sd) log units below the Fayalite-Magnetite-Quartz (FMQ) fO2 buffer. Suboceanic mantle is more reduced than the subcontinental mantle. -from Authors
Publication status:
Published

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Publisher copy:
10.2475/ajs.290.10.1093

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Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Role:
Author
Journal:
AMERICAN JOURNAL OF SCIENCE
Volume:
290
Issue:
10
Pages:
1093-1116
Publication date:
1990-12-05
DOI:
ISSN:
0002-9599
URN:
uuid:25dbe951-b660-49ff-9f52-9dbe8b38ccfe
Source identifiers:
172884
Local pid:
pubs:172884

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