Extended Data Fig. 10: Nucleation rate of bridgmanite at 115 (blue), 125 (green) and 140 GPa (red) as a function of the temperature.
From: The potential for bridgmanite megacrysts to drive magma ocean segregation
The symbols are the calculated results and the solid lines are the corresponding best fits. The dashed lines are adiabats of a cooling magma ocean of a chondritic bulk composition take from ref. 27. Overall, the nucleation rate at 140 GPa is around eight orders of magnitude higher than that at 115 GPa any time along the adiabat. Predicted grain sizes are sensitive to the assumed cooling rate. Values shown are illustrative for the chosen parameter sets and should not be interpreted as quantitative predictions.
