新疆地区现今地壳形变特征与地震活动分析

新疆地区GPS区域站1999—2007年、 2009—2011年观测资料分析结果表明， 该地区水平运动速率分区性明显； 2011年6月以来该地区中强地震增强.
该文在分析区域站水平运动速率特征的基础上， 对2011年1月—2012年3月20个GPS连续观测站基线变化时间序列进行了分析. 结果表明, 各观测站坐标变化量在2011年4月后整体上变大， 新疆地区地壳运动增强， 但具体到不同的山区和盆地， 基线变化趋势各异． 其中， 塔里木盆地和准噶尔盆地内部变形相对较小， 主要变化发生在天山中南部， 出现明显的南北向挤压缩短．

Present crustal deformation characteristics from GPS and seismic activities in Xinjiang region

Based on the velocity analysis of GPS regional sites in Xinjiang region during 1999—2007 and 2009—2011, the horizontal movement characteristics of the sites are obviously partitioned by the longitude 85°E and latitude 43°N. Since June of 2011, earthquakes become frequent and strong in the region. Analyzing the horizontal motion velocity characteristics, this paper studies the baseline time series from 20 continuous GPS stations during January of 2011 through March of 2012. The results show that the baseline variations of those stations have become larger from April of 2011, and further show the crustal movement of the Xinjiang has become stronger at the same time.
However, in mountains and basins, the trends of baseline changes are different. The trends are relatively small in Tarim and Junggar basins. Whereas, in the central and southern Tianshan, crustal deformation changes prominently and crust shortens sharply due to the north-south compression.