川滇菱形块体边界的现今地壳形变

The Recent Crustal Deformation in Sichuan-Yunnan Rhombic Block Boundary

依据川滇菱形块体边界带上所有跨断层测量资料 ,分析了各场地所处断裂的近期形变特征 ,结果表明 :川滇菱形块体北段形变活动逐渐减弱 ,南段逐渐加强 ,各条断裂分别显示出不同的形变特征 ;菱形块体的现今水平形变以左旋走滑运动为主 ,垂直形变速率较低 ,且呈上盘抬升与下降交替出现的运动特征 ;

Based on the data of across-fault measurement in Sichuan-Yunnan rhombic block boundary, analysed the recent deformation character on each fault. The results show that:the rate of the crustal deformation is slowdown on northern segment and increase on southern segmeut of the rhombic block,and display the different deformation characters on each fault.The left-lateral strike-slip movement is the main horizontal deformation,the rate of the vertical deformation is less than horizontal deformation,and showed the character that fault hanging wall uplift alternates with down.The anomaly changes of the crustal deformation on some sites are close correlative with the earthquakes near the sites.