CSEDI Collaborative Research: Mineral Physics Based Geodynamical Modeling of Anisotropic Structure in the Lower Most Mantle

9905601Van keken PIS提出了一个合作项目，以更好地了解地幔底部D‘’层中强烈和高度可变的地震各向异性的性质。各向异性的观测潜在地为动力学过程提供了有用的约束，但基本的矿物物理问题，如LPO或SPO是否控制各向异性还没有解决。该项目计划通过将基于矿物物理的地球动力学模型与地震学观测相结合来确定地震各向异性的可能物理机制。这将允许识别D“层中的水平和垂直流动几何形状、化学不均匀程度，以及可能对部分熔融材料的分布和形状的限制。

9905601Van keken The PIs propose a collaborative project to develop a better understanding of the nature of strong and highly variable seismic anisotropy in the D'' layer at the base of Earth's mantle. Observations of anisotropy potentially provide useful constraints on dynamic processes, but fundamental mineral physics issues, such as whether LPO or SPO controls the anisotropy have not been resolved. This project plans to identify the likely physical mechanisms of seismic anisotropy by combining mineral-physics-based geodynamical modeling with seismological observations. This will allow identification of the horizontal and vertical flow geometry in the D" layer, the degree of chemical heterogeneity, and possibly constraints on the distribution and shape of partially molten materials.