Density differentiation of the Earth's matter and processes at the core-mantle interface

Abstract

The formation of the earth's core was due to the density differentiation of the primitive matter of the earth. This differentiation should be in progress at the core-mantle interface in the present epoch. Redistribution of substances of various densities gives rise to large-scale convective motions in the core and mantle. These motions create the geomagnetic field, and they may be a cause of disturbances at the core-mantle interface. It is shown that the outer core cannot be composed of a mixture or an alloy of two or several substances.