江苏省近期形变特征分析

利用江苏省内GPS连续站基线时间序列分析江苏省整体形变状态，由GPS流动站观测资料计算应变率场，并根据跨断层流动水准资料得到郯庐断裂带江苏段和茅山断裂垂直形变速率，根据以上结果研究江苏省主要断裂2011~2015年的形变特征。结果表明，江苏省受控于挤压应力场作用，大部分区域应变方向为东西向；郯庐断裂带江苏段处于南北向拉张挤压梯度带，垂直形变速率处于正常活动水平；茅山断裂的水平和垂直观测结果均反映出该区域为拉张性质。

The Analysis of Recent Deformation Characteristics in Jiangsu

We collect and calculate the GPS continuous station data, regional station data and leveling data of the Jiangsu area between 2011 and 2015. The characteristics of horizontal deformation in this area are researched by using the time series of GPS baseline and the strain rates. The fitting method considering annual and semi-annual periods is adopted to calculate the velocity of the Maoshan fault vertical deformation. We analyze the vertical deformation of this area. The results show that Jiangsu is controlled by the stress field extrusion of the crust and that the main strain direction in most areas is east-west. The Jiangsu section of the Tanlu fault zone is located in the north-south gradient with tension and extrusion. The vertical velocity of this area is normal. The horizontal and vertical results show that Maoshan fault is the tension fault.