接收函数、面波与重力联合约束地壳厚度与波速比  

Estimating of crustal thickness and vP/vS ratio using receiver function,surface wave and gravity data

作　　者：任志远 李永华[1,2] 强正阳[1,2] 石磊[1,2] Ren Zhiyuan;Li Yonghua;Qiang Zhengyang;Shi Lei(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China;Key Laboratory of Earthquake Source Physics,China Earthquake Administration,Beijing 100081,China)

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]中国地震局震源物理重点实验室,北京100081

出　　处：《地震学报》2022年第6期935-948,共14页Acta Seismologica Sinica

基　　金：国家自然科学基金(U1839210,41874108,41874097);中国地震局地球物理研究所基本科研业务费专项(DQJB20X47)联合资助.

摘　　要：提出了一种利用接收函数、面波频散和重力数据联合约束地壳厚度、vP/vS和平均P波速度的改进方法,并基于两种地壳模型对改进后的方法进行了验证。结果显示,改进后的方法不仅可以提高地壳厚度和波速比的估计精度,还能更准确地估计地壳平均P波速度。在此基础上,将该方法应用于华南地区两个固定台站的地壳结构分析,相关结果也证实了该方法在确定地壳结构中的可行性。Crustal thickness H and vP/vS ratio are two basic parameters for deciphering the crustal structure.We present an improved technique to constrain crustal thickness,vP/vS ratio and average P-wave velocity by using receiver function,surface wave dispersion and gravity data.Synthetic tests show that the improved method not only can accurately estimate H and vP/vS ratio,but also can give a reliable determination of the average crustal vP.Field data from two stations of South China are analyzed by the improved method,and the results also show the feasibility of the new method in constraining crustal properties.

关 键 词：接收函数 面波频散 重力 联合约束 地壳厚度 波速比 地壳平均P 波速度 

分 类 号：P315.31[天文地球—地震学]