山西南部区域应变场演化与地震关系的数值模拟  

Numerical Simulation of the Relationship between Regional Strain Field Evolution and Earthquake in Southern Shanxi Province

作　　者：李宏伟[1,2] 刘瑞春[1,2] 陈永前 LI Hong-wei;LIU Rui-chun;CHEN Yong-qian(Earthquake Administration of Shanxi Province,Taiyuan,Shanxi 030021,China;National Continental Rift Valley Dynamics Observatory of Taiyuan,Taiyuan,Shanxi 030025,China)

机构地区：[1]山西省地震局,山西太原030021 [2]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025

出　　处：《山西地震》2018年第4期7-10,共4页Earthquake Research in Shanxi

基　　金：2017年度中国地震局震情跟踪合同制定向工作任务(2017010502);2017年度中国地震局监测;预测;科研三结合课题(CEA-JC/3JH-160403);山西省科技攻关项目(20140313023-1);山西省地震局科研项目(SBK-1701;SBK-1803)

摘　　要：以山西断陷带南部的临汾盆地和运城盆地为研究对象,基于研究区地壳结构、断层几何参数及介质弹性参数,利用ANSYS有限元软件建立研究区内的三维地质模型,采用2011—2016年GPS速度场作为模型的边界约束条件,得到研究区主压应变场和剪切应变场。结果显示,2011—2016年山西断裂带南部主要以挤压形变为主,在中条山断裂附近形成应变高值区,2016年3月12日在该断裂附近发生盐湖M_L4.8地震。Taken the Linfen basin and Yuncheng basin in the south of Shanxi fault belt as the research objects,and based on the geometrical parameters of faults and elastic parameters of the medium,the 3D geological model in the study area is established by using ANSYS finite element software.The main compressive strain field and shear strain field in the studyarea are obtained by using the GPS velocity field from 2011-2016 as the boundary constraint condition of the model.The results show that the southern part of Shanxi fault zone was dominated by compression deformation in 2011-2016,and a high strain region was formed near Zhongtiaoshan fault.Near the fault,the salt lake M L4.8 earthquake occurred on March 12,2016.

关 键 词：山西断裂带南部 数值模拟 应变场 

分 类 号：P315.22[天文地球—地震学]