The oxygen fugacity at which graphite or diamond forms from carbonate-bearing melts in eclogitic rocks
@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 H. Mohseni and Yi Wei Fei}, journal={Contributions to Mineralogy and Petrology}, year={2015}, volume={169}, pages={1-18} }
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…
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