基于接收函数和邻域算法的地壳各向异性结构反演  

The neighborhood inversion of the crust anisotropic structures with receiver functions

作　　者：任骏声 沈旭章[1] 

机构地区：[1]中国地震局兰州地震研究所,兰州730000

出　　处：《地球物理学进展》2015年第5期2043-2054,共12页Progress in Geophysics

基　　金：中国地震局地震预测研究所基本科研业务专项(2014IESLZ03);国家自然基金项目(41274093);甘肃省自然基金(1208RJZA178)联合资助

摘　　要：本文通过数值模拟,逐个分析了各向异性与倾斜等参数对径向和切向接收函数的影响,总结了各参数对接收函数的影响规律.结合邻域算法(Neighborhood Algorithm)对接收函数反演地壳各向异性结构的方法进行了不同模型的测试,确定了该方法对不同参数反演的稳定性和准确性.并依据反演数值试验的结果,确定了反演中参数选取的原则.最后,将该方法应用于青藏高原东北缘的三个台站,反演了各台站下方地壳的各向异性结构特征.Based on the numerical simulation results, we analyze the detailed influences of each parameter of anisotropy and dipping on the radial and transverse receiver functions.The neighborhood algorithm is used to invert the crustal anisotropy structures.In order to study the stability and accuracy of the inversion results,the synthetic receiver functions of different model are selected to do numerical tests.According to the numerical simulation results,the selection principle of inversion parameters is determined.Finally,we apply this method to the three stations in the northeastern margin of the Tibet,and invert the anisotropic structures of crust beneath the stations.

关 键 词：各向异性 接收函数 邻域算法 反演 青藏高原东北缘 

分 类 号：P315[天文地球—地震学] P641[天文地球—固体地球物理学]