High-Pressure and High-Temperature Experiments on Core-Mantle Segregation in the Accreting Earth
High-Pressure and High-Temperature Experiments on Core-Mantle Segregation in the Accreting Earth
复制标题
增生地球中核幔分离的高压高温实验
作者：
Valerie J. Hiligren;Michael J. Drake;D. Rubie
地球硅酸盐地幔中亲铁元素的丰度太高，如果平衡发生在低压和低温下，地幔就不会与地核中的铁平衡。有人提出，如果在高压和高温下发生平衡，这个问题可能会得到解决。在100毫巴和2000 ℃下测定亲铁元素在液态金属和液态硅酸盐之间的分布表明，亲铁元素丰度不太可能由简单的金属-硅酸盐平衡建立，这表明地核与地幔的分离是一个复杂的过程。
The abundances of siderophile elements in the Earth's silicate mantle are too high for the mantle to have been in equilibrium with iron in the core if equilibrium occurred at low pressures and temperatures. It has been proposed that this problem may be solved if equilibrium occurred at high pressures and temperatures. Experimental determination of the distribution of siderophile elements between liquid metal and liquid silicate at 100 kilobar and 2000�C demonstrates that it is unlikely that siderophile element abundances were established by simple metal-silicate equilibrium, which indicates that the segregation of the core from the mantle was a complex process.