Early Differentiation of the Earth and the Problem of Mantle Siderophile Elements: A New Approach
Early Differentiation of the Earth and the Problem of Mantle Siderophile Elements: A New Approach
复制标题
地球的早期分化和地幔亲铁元素问题：一种新方法
作者：
V. Murthy
地幔中亲铁元素丰度过高的长期问题可以通过考虑地球在3000至3500开尔文的平衡核幔分异来解决。这种高温分异导致地幔亲铁元素丰度与观测值密切匹配。一些亲石（轻）元素可以在这个过程中进入核心，这是必要的，以解释其低密度。地幔中亲铁元素的丰度与最近的物理模型所得出的地球在吸积过程中熔融的结论是一致的。
The long-standing problem of the excess abundances of siderophile elements in the mantle can be resolved by considering an equilibrium core-mantle differentiation in the earth at 3000 to 3500 kelvin. This high-temperature differentiation results in mantle siderophile element abundances that closely match the observed values. Some lithophile (light) elements could enter the core in this process as is necessary to account for its low density. The abundances of siderophile elements in the mantle are consistent with the conclusion derived from the recent physical models that the earth was molten during accretion.