GPS剖面变形与应变积累分析  

Analysis of GPS Section Deformation and Strain Accumulation

作　　者：邹娟茹[1] 保长燕 李昂[3] 

机构地区：[1]杨凌职业技术学院,陕西杨凌712100 [2]青海省第二测绘院,青海西宁810001 [3]西安科技大学,陕西西安710054

出　　处：《地理空间信息》2018年第8期58-59,共2页Geospatial Information

基　　金：国家自然科学基金资助项目(41402265);中国博士后科学基金面上项目一等资助项目(2016M590961);陕西省自然科学基金基础研究计划面上项目(2016JM4014);杨凌职业技术学院科学研究基金资助项目(A2014017);杨凌职业技术学院人文社科类研究基金资助项目(GJ1516)

摘　　要：利用2004~2013年3期GPS速度场数据,对临潭-宕昌断裂GPS剖面变形与应变积累作了探讨,从断裂两侧的水平挤压、拉张与走滑等三方面进行了对比分析。结果表明:(1)在平行于断裂走向上,近10 a来临潭-宕昌断裂两侧显示整体略微左旋走滑;(2)在垂直方向上,断裂两侧表现为持续挤压状态,尤其在2011~2013时间段,挤压特性表现更为明显;(3)从上世纪至今的115 a间,地震多发生于临潭-宕昌断裂南北侧30~100 km范围内,而在临潭-宕昌断裂上形成一个未震空区。In this paper, we used three episodes GPS velocity field data of 2004 ～ 2013 years to discuss the GPS section deformation and strain accumulation of the Lintan-Tanchang fault. We comparative analyzed the level of compression, tension and slip. The results show that(1) in parallel to the fault strike, it shows overall slightly sinistral strike slip of Lintan-Tanchang fault nearly 10 years.(2) In the vertical direction, the both sides of the fault show continuous extrusion state, more obvious squeeze characteristics in 2011～2013 years especially.(3) These 115 years from the last century, the earthquakes occurred north and south side of the 30 ～ 100 km on the both sides of the Lintan-Tanchang fault, however, it formed one blank area where never occurred earthquake on the Lintan-Tanchang fault.

关 键 词：GPS速度场 断裂剖面 应变积累 应力调整 

分 类 号：P228[天文地球—大地测量学与测量工程]