Measured oxygen fugacities of the Angra DOS Reis achondrite as a function of temperature

Details Measured oxygen fugacities of the Angra DOS Reis achondrite as a function of temperature Measured oxygen fugacities of the Angra DOS Reis achondrite as a function of temperature

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..35..363b&link_type=abstract

Earth and Planetary Science Letters, vol. 35, no. 2, June 1977, p. 363-368.

Computer Science

4

Achondrites, Meteoritic Composition, Oxygen, Temperature Effects, Chemical Analysis, Cooling, Crystallization, Iron, Pyroxenes

Scientific paper

Measurements of the oxygen fugacity, f(O2), as a function of temperature, T, were made on an interior bulk sample of the cumulate achondrite, Angra dos Reis. Data clustered between the f(O2)-T relationship of the iron-wustite assemblage and 1.2 log atm units above iron-wustite. Interpretation of the data indicates that, throughout most of the cooling history of the meteorite, f(O2) values were defined by equilibria involving iron-bearing species at values close to the f(O2) of the assemblage iron-wustite. Measured f(O2) data are compatible with crystallization and cooling at pressures greater than 50 bars.

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