Abundances of W and Mo in MORBs: Characterization of the Depleted Mantle Reservoir

Jacobsen题目：morb中W和Mo的丰度：枯竭地幔储层的表征。地幔的组成是地核形成、地幔融化和液态岩浆喷发、地壳俯冲和再循环回到地幔的结果。地幔中某些元素的低丰度可以用它们在地核中的高溶解度来解释。有些元素倾向于硅酸盐矿物，因此在地幔中被发现。有些元素不喜欢金属或矿物，因此集中在液态岩浆中。金属钨(W)和钼（Mo）表现得像金属恋人和液体恋人，所以它们在熔岩中的浓度可以告诉我们很多关于地核形成时间的信息。然而，这些金属的丰度如此之低，以至于很少有质量分析存在。该项目将测量海底玄武岩中的W和Mo，以了解地核、地幔和地壳的分离。

9633498 Jacobsen Title: Abundances of W and Mo in MORBs: characterization of the depleted mantle reservoir. The composition of the Earth's mantle is the consequence of core formation, of mantle melting and liquid magma eruption, and of subduction and recycling of crust back into the mantle. The low abundance of some elements in the mantle is explained by their high solubility in the core. Some elements prefer silicate minerals and therefore are found in the mantle. Some elements do not prefer metal or minerals and are therefore concentrated in liquid magmas. The metals tungsten (W) and molybdenum (Mo) behave like metal- lovers and like liquid-lovers so their concentration in the lavas may tell much about the timing of the formation or the core. These metals are in such low abundance, however, that few quality analyses exist. This project will measure W and Mo in ocean floor basalt to understand the segregation of the Earth's core, mantle, and crust.