剪切波分裂分析方法对地震各向异性研究进展

Research Advances of Shear Splitting Analysis in Seismic Anisotropy

剪切波分裂分析方法已被广泛运用于地球内部介质各向异性研究。不同的分裂分析方法适用于不同的介质(地壳或地幔),揭示不同构造、不同深度介质各向异性特征,为探讨地球深部动力学演化过程提供信息。本文介绍了剪切波分裂理论、分析方法以及总结用于不同区域研究地壳、上地幔各向异性中已经取得的相关成果。分析剪切波分裂分析方法还存在的问题及如何处理,以期在高密度数据资料的基础上获得更为可靠的剪切波分裂参数。

Shear wave splitting analysis method has been widely used in the study of the anisotropy of the earth's interior media.Different splitting analysis methods can be applied to different media(crust or mantle),revealing the seismic anisotropy characteristics of medias with different structures and depths,and providing information for exploring the dynamic evolution process of the deep earth.This paper introduces the theory of shear wave splitting,analysis methods,and summarizes the relevant results that have been obtained in the study of the anisotropy of the crust and upper mantle in different regions.The paper analyzes the remaining problems of the shear wave splitting analysis methods and how to deal with them,in order to obtain more reliable shear wave splitting parameters based on high-density data.