FERRIC IRON IN MANTLE-DERIVED GARNETS - IMPLICATIONS FOR THERMOBAROMETRY AND FOR THE OXIDATION-STATE OF THE MANTLE
The oxidation state of a mantle assemblage may be defined by heterogeneous reactions between oxygen and iron-bearing minerals. In spinel lherzolites, the presence of Fe3+ in spinel allows use of the assemblage olivine-orthopyroxene-spinel to define fO2 at fixed T and P. As a first step towards estab...
| Main Authors: | , , , |
|---|---|
| Format: | Journal article |
| Published: |
1990
|