川滇地块南部主要断裂现今形变特征及危险性分析  

Characteristics of Current Deformation and Earthquake Risk of the Main Faults in the South of Sichuan-Yunnan Block

作　　者：徐东卓[1] 李胜虎[2] 周海涛[1] 王阅兵 王世进[1] Xu Dongzhuo Li Shenghu Zhou Haitao Wang Yuebing Wang Shijin(The First Monitoring and Application Center, CEA, Tianjin 300180, China Sanya Institute of Deep-sea Science and Engineering, China Academy of Sciences, Sanya 572000, Hainan, China National Earthquake Infi：astructure Service, CEA, Beijing 100045, China)

机构地区：[1]中国地震局第一监测中心,天津300180 [2]中国科学院三亚深海科学与工程研究所,海南三亚572000 [3]地壳运动监测工程研究中心,北京100045

出　　处：《震灾防御技术》2017年第3期539-546,共8页Technology for Earthquake Disaster Prevention

基　　金：中国地震局"三结合"课题(CEA-JC/3JH-163704);中国地震局第一监测中心主任科技创新基金(FMC2015013);科技基础性工作专项(2015FY210400)

摘　　要：本文利用川滇地块南部30余年的跨断层观测资料,计算了跨断层场地的三维活动量,分析了区域内断裂的现今形变特征以及川滇地块南部的运动方式,认为部分断裂现今表现出异常活动的现象,川滇地块南部整体表现出以水平顺时针旋转为主的运动学特征,并对该区域中短期地震危险性做出了初步推测。By using the cross-fault observation data for over thirty years in the south of Sichuan-Yunnan block, we calculated surface movement by fault activity in three-dimension. Then we analyzed the current deformation characteristics of the faults in the region and the kinematic features of southern Sichuan-Yunnan block. We found that some faults show abnormal activity at present, and the southern part of Sichuan-Yunnan block shows the horizontal and clockwise rotation way. Finally, we estimated the moderate-and short-term seismic risk in this area.

关 键 词：川滇地块 活动断裂 跨断层监测 形变分析 

分 类 号：P315[天文地球—地震学]