从跨断层短基线观测计算地应变的方法探讨——以唐山台地形变数据为例  

Method of strain calculation based on the cross-fault short-baseline observation—taking the Tangshan deformation data as an example

作　　者：黄建平[1,2] 石耀霖[1] 李文静[3] 

机构地区：[1]中国科学院研究生院计算地球动力学重点实验室,北京100049 [2]中国地震局地震预测研究所,北京100036 [3]中国地震局第一监测中心唐山台,唐山063001

出　　处：《地球物理学报》2010年第5期1118-1126,共9页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目(40774048);中国地震局地震预测研究所基本科研业务项目(0207690236)共同资助

摘　　要：跨断层测量是研究断层活动特征的重要手段之一.本文介绍了一种利用台站短基线观测,通过刚体模型、弹性体模型和组合模型确定断层或断裂带附近应变的方法,并以唐山地形变台资料为例进行对比分析.通过对比同时间段的位移和应变时间序列的变化幅度和趋势特征,认为组合模型更符合实际情况.同时,分析了多条测段不同组合情况下的模型计算结果,探讨了跨断层观测资料与区域GPS数据计算结果之间差异的原因.并提出了基线过渡桩更可能位于断层东侧的认识.Cross-fault observation is one of the important methods in fault movement study. Here a method for strain calculation using a fault model, elastic model, and combination model is introduced based on the cross-fault short-baseline observation, and the crustal deformation data from Tangshan station is taken as an example. By comparison of the amplitudes and trends of the displacement and strain within the same period, the combination model is taken as the best. Meanwhile, different kinds of segment combinations are used for those models and the reason of the difference between cross-fault observation and GPS is also discussed. And it may be more likely that the connection bench should be on the east side of the fault.

关 键 词：断层模型 弹性模型 唐山台 地形变 

分 类 号：P315[天文地球—地震学]