What is the most straightforward principle governing the bulk separation of heavy nickel-iron from lighter silicates during differentiation?

Answer

Gravitational separation

The primary driver for the large-scale movement of major components is gravitational separation, where denser materials sink toward the center of gravity while lighter materials rise.

What is the most straightforward principle governing the bulk separation of heavy nickel-iron from lighter silicates during differentiation?
GeologyscienceEarthplanetdifferentiation