Oxygen thermobarometry of abyssal spinel peridotites:the redox state and C-O-H volatile composition of the Earth's sub-oceanic upper mantle
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 (f O2 ) of the suboceanic mantle is on average 0.9 ± 0.7 (n = 33; ± 1...
| Main Authors: | , |
|---|---|
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
1990
|
| Subjects: | |
| Online Access: | https://researchers.mq.edu.au/en/publications/e79f262a-37ea-4523-b6c5-14335f88114e http://www.scopus.com/inward/record.url?scp=0025523388&partnerID=8YFLogxK |
| Summary: | 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 (f O2 ) of the suboceanic mantle is on average 0.9 ± 0.7 (n = 33; ± 1sd) log units below the Fayalite-Magnetite-Quartz (FMQ) f O2 buffer. Suboceanic mantle is more reduced than the subcontinental mantle. -from Authors |
|---|