Three-Dimensional High Resolution Upper Mantle Shear Wave Velocity Structure

这项研究将建立一个新的全球上地幔三维S波速度模型，其横向分辨率为1000公里或更小。这个项目的新方面是，它将从根本上背离使用很少或不使用先验信息的方法，这种方法是所有最近地震层析成像研究的基础。为了更好地解释浅层岩石圈速度不均匀的压倒性影响，将在一些反演中使用包括地形、地壳和岩石圈变化的区域化初始模式。反演将包括利用Love和Rayleigh波谱数据同时确定震源位置和结构。该项目将促进板块构造、地幔动力学和大地水准面以及岩石学和岩石圈地球化学研究的多学科进展。

This research will develop a new global three-dimensional S- wave velocity model for the upper mantle with lateral resolution of on the order of 1000 km or less. The new aspect of this project is that it will depart fundamentally from the approach of using little or no a priori information which underlies all recent seismological tomographic studies. To better account for the overwhelming influence of shallow lithospheric velocity heterogeneity, a regionalized initial model, including topographic, crustal and lithosphere variations will be used in some of the inversion. The inversions will include simultaneous determination of source locations and structure using Love and Rayleigh wave spectral data. This project will promote multi-disciplinary advances in the study of plate tectonics, mantle dynamics and the geoid, and petrology and geochemistry of the lithosphere.