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Carbon isotope fractionation between graphite and carbonated silicate melt was determined at 5 GPa and in the temperature range between 1400 and 1900 °C. High pressure experiments were carried out in the carbon-saturated model harzbergite system (Enstatite–Magnesite–Olivine–Graphite), where carbonated silicate melt and graphite were the two stable carbon-bearing phases in the run products. Carbonated...