Davemaoite as the mantle mineral with the highest melting temperature.

ABSTRACT: Knowledge of high-pressure melting curves of silicate minerals is critical for modeling the thermal-chemical evolution of rocky planets. However, the melting temperature of davemaoite, the third most abundant mineral in Earth's lower mantle, is still controversial. Here, we investigate the melting curves of two minerals, MgSiO₃ bridgmanite and CaSiO₃ davemaoite, under their stability field in the mantle by performing first-principles molecular dynamics simulations based on the density functional theory. The melting curve of bridgmanite is in excellent agreement with previous studies, confirming a general consensus on its melting temperature. However, we predict a much higher melting curve of davemaoite than almost all previous estimates. Melting temperature of davemao

SUBMITTER: Yin K 

PROVIDER: S-EPMC10699773 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature