1999～2001年南北地震带GPS综合观测解的负位错模型  

NEGATIVE DISLOCATION MODEL FOR SYNTHETIC SOLUTION OF GPS OBSERVATION OF SOUTH-NORTH SEISMIC ZONE DURING1999～2001

作　　者：张希[1] 江在森[2] 王双绪[1] 

机构地区：[1]中国地震局第二监测中心,陕西西安710054 [2]中国地震局分析预报中心,北京100036

出　　处：《高原地震》2004年第1期26-34,共9页Plateau Earthquake Research

基　　金：中国地震局"十五"重点项目子课题"中国大陆构造变形变化特征和重点地区应变积累状态研究";地震科学联合基金"地壳运动的非震负位错模型反演与强震地点预测研究";国家重点基础研究<大陆强震机理与预测>973项目(G1998040703)共同资助。

摘　　要：利用1999～2001年中国大陆GPS最优综合观测解资料,借助改进的负位错模型,研究南北地震带及其邻近区域活动块体与其边界断裂的构造变形特征,获取高应力应变积累的闭锁区段及可能与强震孕育有关的背景信息。分析表明:祁连山断裂带与海原断裂和日月山断裂交汇区、日月山断裂南段与拉脊山断裂、宗务隆山-西秦岭北缘断裂交汇部位;盐源-丽江地块及NE向延伸至川滇交界的安宁河、则木河断裂交汇区及其临近区域;鲜水河至安宁河断裂北段以及与龙门山断裂交汇部位、滇西南边界的永德龙陵-澜沧-勐遮断裂及其北段与怒江断裂交汇区域可能具有高应变能积累背景。而阿尔金断裂中段、海原断裂东段、库玛断裂东端、红河断裂中东段与元谋-绿汁江断裂及小江断裂的交汇区域也可能存在一定程度的应变积累背景。Using synthetic solution of GPS observation of Chinese Mainland during 1999～2001,aided by improved negative dislocation model,the tectonic deformation characteristics of active blocks and their boundary faults of the South-North seismic belt are discussed,so are the locked segments reflecting accumulation of high stress-strain and background relating to development of strong earthquakes.The analysis shows that:zones of convergence of Qilianshan fault zone and Haiyuan fault and Riyueshan fault;of the south segment of Riyueshan faults and Lajishan fault;of Zongwulongshan fault and the northern margin fault of west Qinling;of Yanyuan-Lijiang block and its northeastward extending to the boundary between Sichuan and Yunnan and its neiboring areas;of Xianshuihe fault and north segment of Anninghe fault and the Longmenshan fault;of Yongde-Longlin fault and Lancang-Mengzhe fault of the southwestern boundary of Yunnan,there probably have background of high strain energy accumulation in these convergence areas.In addition,the medium segment of A'erjin fault,the east segment of Haiyuan fault,the east end of Kuma fault,the medium-east segment of Honghe fault and the place,Yuanmou-Luzhijiang fault and Xiaojiang fault,there may also exist background of strain accumulation in these areas.

关 键 词：南北地震带 GPS综合观测解 改进的负位错模型 

分 类 号：P315.2[天文地球—地震学]