The Effects of Olivine Anisotropy on Liquid Distribution, Seismic, and Electrical Properties of Partial Melts of the Upper Mantle

这是对上地幔部分熔体中熔体包裹体形态的实验研究。这项研究的动机是观察到实验制备的样品的晶体-熔体形态与理论预测的光滑弯曲的晶体-熔体界面不一致。熔体的几何形状对地震速度有很大影响，这些数据可以用来模拟熔体存在时的上地幔速度结构。根据已建立的部分熔融岩石的弹性、非弹性和电学性质模型，将使用对运行后样品的数字背散射电子图像的分析来获得计算地震速度所需的参数(如熔体包裹体的纵横比、熔体面积、总熔体分数)。这是表征上地幔系统熔体分布的一种很有前途的新方法。

This is an experimental investigation of the shapes of melt inclusions in upper mantle partial melts. This investigation is motivated by the observation that the crystal-melt morphology of experimentally produced samples is not consistent with theoretically predicted smoothly curved crystal-melt interfaces. The melt geometry has a paramount effect on seismic velocities, and the data can be applied to model the upper mantle velocity structure in the presence of melt. Analysis of digital backscattered electron images of the post-run samples will be used to obtain the parameters needed (such as the aspect ration of melt inclusions, their area, the total melt fraction) to calculate seismic velocities, based on established models of elastic, anelasic and electrical properties of partially molten rocks. This is a promising new approach to characterize the melt distribution in upper mantle systems.