【摘要】 利用1981年以来鲜水河断裂带跨断层短水准、短基线观测资料,计算多年来断层的水平扭错、水平张压以及垂直升降变化量,以此分析各测点断层随时间推移的活动习性。认为:昆仑山口西8.1级地震后,鲜水河断裂带中南段断层的走滑和张压活动分量有所改变,垂直升降活动变化则不明显。中段的沟普测点扭错活动量在逐渐减小,类似道孚6.9级地震后扭错活动逐步衰减的趋势,该测点1997年后结束了的压性活动,在2002～2005年间快速逼近"闭锁",直至2006～2007年间改变了多年的活动习性,出现张性活动趋势。同样,以左旋扭错为主的老乾宁测点在该时间段内也改变了多年的断层活动习性,出现右旋运动趋势。更多还原

【Abstract】 In this paper,we calculate the torsion,tension and vertical deformation of the Xianshuihe fault over the years and discuss the fault activity behavior on the basis of deformation of the measuring point along the fault based on the observational data of short leveling and baseline along the Xianshuihe fault since 1981.The results show that the torsion and tension deformation has changed a little,but vertical deformation is not obvious along the the middle-south segment of Xianshuihe fault after the Kunlun Mountain MS8.1 Earthquake.The decreased torsion deformation at the Goupu measuring point in the middle segment is similar to that of the Daofu MS6.9 earthquake.Compressive activity of the fault had consummated after 1997,drawn on to the fault locking status with a high-speed from 2002 to 2005.Till 2006 to 2007,its activity behavior of years changed and tensional activity trend showed up.Also,the left-lateral distortion deformation in the Laoqianning measuring point also changed and the right-lateral distortion deformation trend has come into being.更多还原