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THE STABILITY OF CARBONATE UNDER UPPER-MANTLE CONDITIONS AS A FUNCTION OF TEMPERATURE AND OXYGEN FUGACITY

Abstract:

The stability of carbonate in the upper-mantle is a function of oxygen fugacity. Carbon-carbonate buffers such as EMOG (enstatite-magnesite-olivine-graphite) provide a lower fO2 limit for carbonate stability. For mantle compositions, the position of the carbonate-oxide equilibrium has been experimentally calibrated at 20 kbar and 1000°C at graphite saturation. This equilibrium constrains the upper fO2 limit for carbonate stability given that Fe contents are much less than Mg in both carbonate...

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Publication status:
Published

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Host title:
EUROPEAN JOURNAL OF MINERALOGY
Volume:
7
Issue:
4
Pages:
883-891
Publication date:
1995-01-01
ISSN:
0935-1221
Keywords:
Pubs id:
pubs:163805
UUID:
uuid:ce5a0a1f-405f-404c-a0f6-e769f45123c1
Local pid:
pubs:163805
Source identifiers:
163805
Deposit date:
2012-12-19

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