断层位错引起的地表形变特征  

CHARACTERISTICS OF SURFACE DEFORMATION CAUSED BY FAULT DISLOCATION

作　　者：谈洪波[1,2] 申重阳[1,2] 李辉[1,2] 李冀[1,2] 

机构地区：[1]中国地震局地震研究所,武汉430071 [2]地壳运动与地球观测实验室,武汉430071

出　　处：《大地测量与地球动力学》2009年第3期42-49,共8页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40574012);地震科学联合基金(A07030)

摘　　要：基于连续、各向同性、弹性半无限空间中有限矩形断层位错引起的地表形变理论,研究了单一断层和两条断层组合错动引起的地表形变图像特征。得到:1)对于单一断层错动,地表形变特征与断层错动方式密切相关,断层埋深、倾角和错动量的大小对地表形变分布也有较大影响;2)对两条断层组合情形,断层同一深度分布时,地表形变与断层之间的相对位置密切相关;断层不同深度分布时,地表形变主要受浅部断层的影响。According to the theory of surface deformation caused by the dislocation on a rectangular fault within an isotropic homogeneous half-space, the characteristics of surface deformation caused by one fault or combination of two faults are studied. The main conclusion are as follows： 1） For one fault, the characteristics of surface deformation and the pattern of dislocation is closely related. The depth of fault, the dip angle and the magnitude of dislocation（ U1, U2, U3 ） have grate effects on the deformation as well. 2） For the combination of two faults, when they are in the same depth, the relative position of the faults have great effect on the surface deformation; when they are in different depth, the shallow fault plays a dominant role in the total surface deformation.

关 键 词：断层位错模型 各向同性弹性半无限空间 断层组合 地表形变 特征 

分 类 号：O241.1[理学—计算数学] P542[理学—数学]