应用GPS速度场和地震数据反演中国大陆构造应变场  

Inversion of tectonic strain field in China continent using integrated data of GPS velocity field and seismic moment tensor

作　　者：李志才[1,2] 张鹏[1,2] 丁开华[3] 蒋志浩 陈现军[1] 

机构地区：[1]国家基础地理信息中心,北京100830 [2]导航与位置服务国家测绘地理信息局重点实验室,北京100830 [3]中国地质大学,武汉221116

出　　处：《测绘科学》2016年第1期60-64,共5页Science of Surveying and Mapping

基　　金：国家自然科学基金(41274030;41204001);国家863科技项目(2013AA122501;2013AA122502;2014AA123104);国家测绘地理信息局基础测绘科技项目(14-JC-C01-2)

摘　　要：为获得更准确的中国大陆地壳应力应变场,文章基于ITRF2005全球地心坐标参考框架,采用高精度数据处理方法计算了中国地壳运动观测网络1999—2009年间的观测数据,获得了中国大陆GPS速度场以及相对欧亚板块的区域形变场,计算结果显示中国大陆形变运动仍是西强东弱的格局;并利用中国大陆同期近30年的地震矩张量及第四纪活动断层研究成果资料,联合反演了中国大陆区域的构造应变场,结果表明:从总体来看,应变相对集中的区域为喜马拉雅构造带、青藏高原、帕米尔高原、阿尔金断裂带、新疆天山及川滇地区,中国大陆区域过去10年的构造变化以挤压为主,拉张为辅。In order to obtain more accurate crustal stress and strain field of China's Mainland,based on high precision data processing strategy,the paper derived GPS velocity field and the regional deformation filed within Eurasian plate within ITRF 2005 in China's Mainland by using the GPS observation data of the10 year time-span 1999-2009 from Crustal Movement Observation Network of China,and the calculated result showed that the deformation is not uniformed distributed in China's Mainland,with the character of stronger part in the west rather than in the east.Moreover,together with the inferred GPS filed,the seismic moment tensor data in recent 30 years and the Quaternary active fault research results were applied to invert the tectonic strain rate filed in China's Mainland.Result demonstrated that the most strain is accumulated in the western part of the mainland,in general,the areas with the stronger stress are as Himalaya tectonic belt,Qinghai Tibet Plateau,the Pamir Plateau,the Altyn Tagh fault zone,Xinjiang and Tianshan Mountains and Sichuan-Yunnan region;the variation of stain in the past 10 years was dominated by compression and with some tension.

关 键 词：GPS 地震矩张量 应变场 反演 

分 类 号：P228[天文地球—大地测量学与测量工程]