The existence of heat-producing elements (U, Th, K) and their highly heterogeneous distribution in the Earth's mantle suggests a link between thermal and chemical properties of the mantle. Previous studies have shown that ...

The detection of several ultralow velocity zones (ULVZ) on the core-mantle boundary (CMB) together with the recent estimates of the lower-mantle solidus would suggest that some sort of melting may occur inside the upwellings ...