Extended Data Fig. 3: Evolution of the compositions of magma ocean as a function of the core-mantle boundary temperature.
From: Deep mantle heterogeneities formed through a basal magma ocean contaminated by core exsolution
The upper panel is for BMO and the bottom is for BECMO. The fractions of components in wt% are shown in white (MgO), gray (FeO), and black (SiO2). As FeO enriches in the BMO/BECMO, the cotectic point along the (Mg,Fe)O-SiO2 system shifts towards a composition of lower SiO2 contents, allowing for continuous fractionation of bridgmanite even as SiO2 becomes increasingly depleted in the basal magma ocean. The addition of SiO2 deviates the bulk composition of magma ocean away from the cotectic valley of MgO-MgSiO3, and thus prolong the production of bridgmanite in BECMO.
