Role of magma in chemical evolution of the Earth

地球由70%的富MgO橄榄岩（地幔）和30%的富Fe-Ni金属核组成。玄武岩是地幔橄榄岩部分熔融形成的，是地壳的主要组成部分。岩浆的作用（熔融现象）在地球内部演化（化学分异）中起到了非常大的作用。我们进行了高压实验，首次成功地从实验上再现了微量元素在晶体和岩浆之间的分配系数（PC-IR图）的压力依赖性，并提出了解释这种压力依赖性的理论。

The Earth consists of 70% of MgO-rich peridotite (mantle) and 30% of Fe-Ni-rich metallic core. Basalt which is the main component of the Earth's crust is formed by partial melting of the mantle peridotite. Role of magma (melting phenomenon) has played very large role in the Earth's interior evolution (chemical differentiation). We have carried out high-pressure experiments and succeeded for the first time to reproduce experimentally the pressure dependence of the partition coefficient of trace elements between crystals and magma (PC-IR diagram).We proposed a theory that explains the pressure dependence.