The oxygen fugacity at which graphite or diamond forms from carbonate-bearing melts in eclogitic rocks | Semantic Scholar
@article{Stagno2015TheOF,
title={The oxygen fugacity at which graphite or diamond forms from carbonate-bearing melts in eclogitic rocks},
author={Vincenzo Stagno and Daniel J. Frost and Catherine A McCammon and Hossein Mohseni and Yingwei Fei},
journal={Contributions to Mineralogy and Petrology},
year={2015},
volume={169},
pages={1-18},
url={https://api.semanticscholar.org/CorpusID:129243867}
}The oxygen fugacity (fO2) at which carbonate-bearing melts are reduced to either graphite or diamond in synthetic eclogite compositions has been measured in multi-anvil experiments performed at pressures between 3 and 7 GPa and temperatures between 800 and 1,300 °C using iron–iridium and iron–platinum alloys as sliding redox sensors. The determined oxygen fugacities buffered by the coexistence of elemental carbon and carbonate-bearing melt are approximately 1 log unit below thermodynamic…