Measured oxygen fugacities of the Angra dos Reis achondrite as a function of temperature
Earth and Planetary Science Letters
By: R. Brett, Huebner J. Stephen, and M. Sato
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Abstract
Measurements of the oxygen fugacity (ƒO2) as a function of temperature (T) were made on an interior bulk sample of the cumulate achondrite, Angra dos Reis. Data clustered between theƒO2-T relationship of the iron-wüstite assemblage and 1.2 log atm units above iron-wüstite. Interpretation of the data indicates that, throughout most of the cooling history of the meteorite, ƒO2 values were defined by equilibria involving iron-bearing species at values close to the ƒO2 of the assemblage iron-wüstite. Measured ƒO2 data are compatible with crystallization and cooling at pressures greater than 50 bars.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Measured oxygen fugacities of the Angra dos Reis achondrite as a function of temperature |
| Series title | Earth and Planetary Science Letters |
| DOI | 10.1016/0012-821X(77)90139-X |
| Volume | 35 |
| Issue | 2 |
| Year Published | 1977 |
| Language | English |
| Publisher | Elsevier |
| Description | 6 p. |
| First page | 363 |
| Last page | 368 |