摘要
以川滇地区上中国地壳运动观测网络1998～2004年间的GPS观测成果为约束,基于地质学给出了块体划分模型,分别利用刚体运动模型、块体运动和形变模型反演了川滇地区内各活动块体的现今地壳运动和变形参数,并进一步对上述两种模型进行了辨识。结果表明,川滇地区的各块体用块体运动和形变模型来描述更为合适。通过对活动块体及断层运动进行讨论分析,认为川滇地区的地壳运动由西向东、由北向南逐渐减弱,且有顺时针旋转的特征,而地壳变形模式以连续和渐变的剪切为主要特征。
Constrained by GPS from CMONOC between 1998 and 2004 in Sichuan-Yunnan region, based on geological division of blocks, we inverse the parameters of active blocks about their pres- ent-day crustal movement and deformation by rigid body model and movement and strain model sep- arately. With the comparison of these two models by model identification, it is concluded that it is more proper to describe the properties of crustal movement of active blocks by movement and strain model in Sichuan-Yunnan region. Through the analysis of the movement of active blocks and main faults, the results showed that the characters of crustal movement can be represented by clockwise motion, weakened gradually from west to east and from north to south, and the main feature of crustal deformation is continuous and with gradient shear in Sichuan-Yunnan region.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2013年第7期822-827,共6页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(41074007
40974017
40974011)
中国博士后科学基金资助项目(20110491229)
地理信息系统软件及其应用教育部工程研究中心开放研究基金资助项目(20111102)
中央高校基本科研业务专项基金资助项目(CUGL100233)
关键词
川滇地区
地壳运动
地壳变形
GPS
模型辨识
Sichuan-Yunnan region
crustal movement
crustal deformation
GPS
modelidentification
