断层三维转动及其引起的地表形变空间分布特征
发布时间：2018-09-14 08:06
【摘要】：以向错理论为基础,在断层一维转动与地表形变关系研究的基础上,推导了弹性半空间均匀介质中断层三维转动与地表形变的关系,对不同深度和倾角的断层以不同方式转动产生的地表形变的曲线变化特征进行了分析,计算了断层以不同方式转动产生的地表水平位移和垂直形变的空间分布特征,结果表明:1)断层转动对地表位移的影响随着断层深度的增加不断衰减,地表位移对不同倾角的断层转动有不同的响应,其中以断层角点为转动轴的断层向错引起的地表形变受倾角的影响最为显著;2)断层以不同方式转动相同的量产生的水平位移和垂直形变在数值上大小相近,垂直形变的空间分布与断层的转动方式有关;3)断层三维转动与滑动引起的地表形变在数值大小上有区别,但具有相同的量级,空间上断层滑动引起的形变范围相对转动较为广泛。最后,讨论了断层向错理论在地壳形变分析中存在的问题。
[Abstract]:Based on the theory of fault direction and based on the study of the relationship between one-dimensional fault rotation and surface deformation, the relationship between fault three-dimensional rotation and surface deformation in elastic half-space homogeneous media is derived. The curve variation characteristics of surface deformation caused by different depth and dip angle fault rotation in different ways are analyzed, and the spatial distribution characteristics of surface horizontal displacement and vertical deformation caused by fault rotation in different ways are calculated. The results show that the effect of fault rotation on surface displacement decreases with the increase of fault depth, and the surface displacement has different responses to fault rotation with different dip angles. The surface deformation caused by the fault direction misalignment with the fault corner as the rotation axis is most significantly affected by the dip angle. 2) the horizontal displacement and the vertical deformation caused by the same amount of fault rotation in different ways are similar in numerical value. The spatial distribution of vertical deformation is related to the mode of fault rotation. (3) the surface deformation caused by 3D rotation and sliding of the fault is different in numerical value, but of the same order of magnitude. The range of deformation caused by fault sliding on space is relatively wide. Finally, the problems in crustal deformation analysis based on fault dislocation theory are discussed.
【作者单位】： 长安大学地质工程与测绘学院;武汉大学测绘学院;
【基金】：国家自然科学基金(41374028;40674001) 国土资源大调查项目(1212010914015) 中央高校基本科研业务费专项资金(CHD2012TD004)~~
【分类号】：P227
本文编号：2242076
[Abstract]:Based on the theory of fault direction and based on the study of the relationship between one-dimensional fault rotation and surface deformation, the relationship between fault three-dimensional rotation and surface deformation in elastic half-space homogeneous media is derived. The curve variation characteristics of surface deformation caused by different depth and dip angle fault rotation in different ways are analyzed, and the spatial distribution characteristics of surface horizontal displacement and vertical deformation caused by fault rotation in different ways are calculated. The results show that the effect of fault rotation on surface displacement decreases with the increase of fault depth, and the surface displacement has different responses to fault rotation with different dip angles. The surface deformation caused by the fault direction misalignment with the fault corner as the rotation axis is most significantly affected by the dip angle. 2) the horizontal displacement and the vertical deformation caused by the same amount of fault rotation in different ways are similar in numerical value. The spatial distribution of vertical deformation is related to the mode of fault rotation. (3) the surface deformation caused by 3D rotation and sliding of the fault is different in numerical value, but of the same order of magnitude. The range of deformation caused by fault sliding on space is relatively wide. Finally, the problems in crustal deformation analysis based on fault dislocation theory are discussed.
【作者单位】： 长安大学地质工程与测绘学院;武汉大学测绘学院;
【基金】：国家自然科学基金(41374028;40674001) 国土资源大调查项目(1212010914015) 中央高校基本科研业务费专项资金(CHD2012TD004)~~
【分类号】：P227
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