Fig. 2: Correlations between the fo2 of mantle derived melts and melting conditions.
From: The constant oxidation state of Earth’s mantle since the Hadean
a The fo2 plot against TP. b The fo2 plot against melting pressure. TP and melting pressure are calculated by the thermobarometers24,27. The solid lines and error bands represent regression lines and 95% confidence intervals, respectively. Both plume and ambient-derived melts exhibit a strong inverse correlation between TP, melting pressure, and fo2, suggesting that the fo2 of mantle-derived melts is controlled by the thermal state of the mantle. The error bars for all results are 1σ.
