HIGH-PRESSURE EXPERIMENTAL, STUDIES OF DIFFERENTIATION AND LAYERED STRUCTURE OF THE EARTH

在高压力和高温度下进行的原位X射线研究已经使用SPring-8和一个多砧装置MA进行了同步加速器辐射（SD）进行了开发。Pressures to 40 GPa were generated over ca. 5 mmイイD13イエD1。使用该系统的热弹性性能的立方体SnO D22 D2 （Pa-3-）已确定为29 GPa和1500 K。Exploration of iron "-Fe" has not be successful so far， and "-phase is stable up to ca.40 GPa and 1700 K. Melting experiments on natural peridotite were carried out to 35 GPa。它被观察到，第一个液体从Magnesiowustite （Mw）到Mg-Perovskite （Mg-Pv）在31 GPa，压力增加。Phase differentiation and element partitioning upon melting were clarified based on analyses of the experimental charges。Mg-Pv和Ca-Pv的断裂应该事先在一个超过1000公里的岩浆海洋深处进行，这可能直接与低地幔中地质化学储备金的形成有关。镍和钴在熔化铁、硅液体、Mg-Pv和Mw之间的划分已被测试到29 GPa。实验结果建议认为，在1000公里深度磁海洋中的核心形成与地幔和核心之间的观察分区数据一致。

In situ X-ray study at high-pressure and high -temperature has been developed using the synchrotron radiation at SPring-8 and a multi-anvil apparatus MA) equipped with sintered diamond (SD). Pressures to 40 GPa were generated over ca.5mmィイD13ィエD1. Using this systems termoelastic properties of the cubic SnOィイD22ィエD2 (Pa3-) were determined up to 29 GPa and 1500 K. Exploration of iron "β-Fe" has not be successful so far, and ε-phase is stable up to ca.40 GPa and 1700 K.Melting experiments on natural peridotite were carried out to 35 GPa. It was observed that the first liquidus phase changed from magnesiowustite (Mw) to Mg-perovskite (Mg-Pv) at 31 GPa with increase of pressure. Phase differentiation and element partitioning upon melting were clarified based on analyses of the experimental charges. Fractionation of Mg-Pv and Ca-Pv should proceed predominantly in a magma ocean deeper than 1000 km, which may be directly related to the formation of the geochemical reservoir in the lower mantle. Partioning of Ni and Co between molten iron, and silicate liquid, Mg-Pv and Mw were examined up to 29 GPa. The experimental results suggest that core formation in a 1000km-depth magma ocean is consistent with the observed partitioning data of Ni and Co between the mantle and core.