Tomographic Inversion for Mantle Shear Structure

9404875这项研究是绘制地幔三维剪切波结构图的继续努力。此前，已测量了S震相、SCS震相和多次反弹S震相的旅行时，并进行了反演，得到了美洲之下地幔结构的三维模型。将从不同类型的震相、SKS、SKKS和多个S震相以及新的台震组合中收集新的数据，以提高以前结果的分辨率和范围。新的研究领域将包括亚洲、非洲和北印度洋的上地幔。这些结果将为解决地幔异常和诸如俯冲板块的最终命运、热点的起源和地幔对流的性质等问题提供解决方案。***

9404875 Grand This research is a continuation of efforts to map the three- dimensional shear wave structure of the earth's mantle. Previously, the travel times of S, ScS and multiple bounce S phases have been measured and inverted to obtain a 3-D model of mantle structure beneath the Americas. New data will be collected from different types of seismic phases, SKS, SKKS, and multiple S, and from new station-earthquake combinations to increase the resolution and range of the previous results. New areas of study will include the upper mantle of Asia, Africa, and the northern Indian ocean. The results will provide resolution of mantle anomalies and questions such as the ultimate fate of subducting slabs, the origin of hotspots, and nature of mantle convection. ***