地震地磁观测与研究Issue(1)：28-36,9.DOI:10.3969/j.issn.1003-3246.2015.01.005
基于GPS的云南地区活动地块现今运动及应变特征分析
The analysis of current crustal deformation and strain characteristics of active blocks in Yunnan region based on GPS
摘要
Abstract
GPS data from CMONOC between 2009 and 2013 in Yunnan region were processed by GAMIT/GLOBK, and a velocity field relative to the Eurasian reference frame was obtained. Based on geological division of blocks, the Yunnan region can divided into seven active secondary crustal blocks. Using REHSM model, the present-day Euler rotation vectors of seven secondary blocks are calculated and analyzed based on GPS stations velocities. The velocities of crustal block includes South China block, northwestern Yunnan block, central Yunnan block, South Sichuan-Yunnan rhombic block, Indochina block, Baoshan and Tengchong blocks wera estimated by least-square fi tting under the rigid body model. The results indicate that the direction of crustal movement to the area changes from SSE to SSW gradually. The Sichuan-Yunnan rhombic block is characterized by clockwise rotation. The velocities of those blocks outside the rhombic block decrease swiftly. The orientations of principal compressive stress are: SE in eastern Yunnan and South China block , SE-SSE in central Yunnan block, SSE in northwestern Yunnan block, NNW in indochina block, NE-NNE in Tengchong-Baoshan blobk.关键词
GAMIT/GLOBK/活动块体/GPS/应变模型Key words
GAMIT/GLOBK/active block/GPS/strain model引用本文复制引用
王伶俐,邵德盛,施发奇..基于GPS的云南地区活动地块现今运动及应变特征分析[J].地震地磁观测与研究,2015,(1):28-36,9.基金项目
云南省地震局青年基金课题“基于高密度GPS区域网复测资料分析云南地区近期地壳形变特征（201301）和云南省地震局科技人员传帮带项目（C2-2014007）联合资助 （）
