Schematic representation of the considered mantle model. Illustrating the wide range of thermal conditions covered by the used EoS. The fluid and the solid phases are separated by the MgSiO₃ melting curve (solid line) of Eq. (16), including a correction factor for additional MgO, SiO₂ and FeO. The two dashed lines represent the perovskite/post-perovskite transition (lower) and dissociation pressure (upper). The dotted line illustrates the approximate location of the vapor curve, calculated using M-ANEOS and the parameters for pure SiO₂.