针对一般倾角的走滑/倾滑位移理论公式的改进  

Improvements for the Strike/Dip-Slip Displacement Theory Formula of General Dip Fault

作　　者：邹镇宇[1,2] 江在森[2] 武艳强[3] 魏文薪[2] 刘晓霞[2] 张龙[4] 

机构地区：[1]中国地震局地质研究所地震动力学国家重点实验室,北京市华严里甲1号100029 [2]中国地震局地震预测研究所中国地震局地震预测重点实验室,北京市复兴路63号100036 [3]中国地震局第一监测中心,天津市耐火路7号300180 [4]九州大学工学府

出　　处：《大地测量与地球动力学》2015年第3期460-463,468,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41274008;41474002)

摘　　要：对Savage走滑位移公式加以改进,使其在反映走滑断层特征的基础上包含断层的倾角信息,体现断层倾角对地表位移的影响。当断层不是直立时,结论如下:1)震间形变曲线的中心不在断层出露地表处,而在断层闭锁与滑动分界线在地表的投影处;2)断层倾角δ、断层闭锁深度d之间存在几何关系:tanδ=d/doffset;3)由于同震沿断层面破裂,其位置与震间形变曲线中心不一致,导致同震时上下盘位移不对称。此改进同样适用于倾滑断层。Savage＇s strike-slip formula was improved in this paper, by retaining the original formula to reflect the characteristics of the strike-slip fault and containing the information on fault dip, which reflects the influence of fault dip to surface displacement. When the fault dip is not vertical, the conclusions are as follows. 1） The center of inter-seismic deformation curve is not at the fault outcropping but at the fault lock and slide boundary which projects to the surface. 2） There is the geometric rela- tionship between fault dip 8 and locking depth d.tanδ=d/doffset 3） The earthquake ruptures along the fault plane, its location is inconsistent with the center of the inter-seismic deformation curve, so the displacement of upper and lower plates is asymmetry when earthquake occurs. Because this process is applicable to dip-slip faults, improved dip-slip fault displacement formula is given in the paper.

关 键 词：震间 同震 倾角 走滑 倾滑 

分 类 号：P315[天文地球—地震学]