魏文薪, 江在森, 武艳强, 赵静. 利用GPS数据研究川滇块体东边界主要断裂带运动特性[J]. 武汉大学学报 ( 信息科学版), 2012, 37(9): 1041-1044.
引用本文: 魏文薪, 江在森, 武艳强, 赵静. 利用GPS数据研究川滇块体东边界主要断裂带运动特性[J]. 武汉大学学报 ( 信息科学版), 2012, 37(9): 1041-1044.
WEI Wenxin, JIANG Zaisen, WU Yanqiang, ZHAO Jing. Motion Characteristics of Major Faults in East Boundary of Sichuan-Yunnan Block Obtained with GPS Data[J]. Geomatics and Information Science of Wuhan University, 2012, 37(9): 1041-1044.
Citation: WEI Wenxin, JIANG Zaisen, WU Yanqiang, ZHAO Jing. Motion Characteristics of Major Faults in East Boundary of Sichuan-Yunnan Block Obtained with GPS Data[J]. Geomatics and Information Science of Wuhan University, 2012, 37(9): 1041-1044.

利用GPS数据研究川滇块体东边界主要断裂带运动特性

Motion Characteristics of Major Faults in East Boundary of Sichuan-Yunnan Block Obtained with GPS Data

  • 摘要: 利用1999~2007时段的GPS速度场,对块体刚体旋转模型、块体整体旋转与均匀应变模型及块体整体旋转与线性应变模型的速度残差及无偏性进行估计;针对川滇块体东边界主要断裂带变形的复杂性,结合3种块体变形模型,求得各断裂带的平均滑动速率,并给出了该研究区域断裂带的近场滑动速率。在确定各断裂带可能变形宽度的基础上,利用断裂带构造变形定量分析方法确定了鲜水河-安宁河-则木河-小江断裂带的相对闭锁且剪切应变积累速度较高的异常区域为安宁河断裂带。

     

    Abstract: Based on the GPS velocity field data from 1999-2007,we estimate velocity residuals and unbiassedness of rigid model,uniform strain model and linear strain model about block movement.Results show that block movement characteristics can be well described by linear strain model.According to the complexity of the fault belt deformation,we also give slip velocity of each fault in east boundary of Sichuan-Yunnan block using above three models to solve average sliding rate and near-field rate of faults in the research area.On the basis of judging possible deformation width of each fault,we obtain the abnormal region are Anninghe fault,which are relatively closed and the high rate of shear strain accumulation in the Xianshuihe-Anninghe-Zemuhe-Xiaojiang faults.

     

/

返回文章
返回