A Concert of Exothermic Phase Changes

This brief review examines exothermic mineral phase transitions at the base of Earth’s mantle and their influence on core–mantle boundary heat flux. Focusing on the bridgmanite-to-post-perovskite transition along LLSVP margins, it summarizes how phase-boundary migration can redistribute mass and generate localized heat-flux anomalies. Drawing on published seismic observations and thermal modeling studies, the review highlights how latent heat release at these transitions may drive mantle plumes and affect long-wavelength mantle structure detectable at Earth’s surface. These insights provide an overview of deep-Earth dynamics and the coupled processes controlling heat transfer from the core to the mantle.