川滇地块南部主要断裂现今形变特征及危险性分析

摘要

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-Yurman 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.%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.