Formation of the stratified ocean of the core: A ternary alloy model

A light fluid accumulation on the Core–Mantle Boundary due to barodiffusion is considered in an earlier paper [S.I. Braginsky. Formation of the stratified ocean of the core. Earth Planet. Sci. Lett. 243 (2006) 650–656], assuming that the Earthʹs core consists of binary solution of iron and some light admixture. The accumulated light fluid forms on the Core–Mantle Boundary a stably stratified layer; we call this layer the Stratified Ocean of the Core (SOC). In this paper a similar mechanism of the SOC formation is considered assuming that the core material is a ternary alloy of iron and two light components, in conformity with the new information about the core chemical physics.