临潼-长安断裂构造发育特征——基于人工地震探测结果分析

Structural development characters of Lintong-Changan fault: Based on result analysis of artificial seismic survey

临潼-长安断裂地处黄土区,黄土稳定性差,以往多采用地面和遥感地质调查等方法加以研究。由于受黄土塬边滑坡或湿陷性影响,得到的断层剖面构造特征不但深度有限可靠性差,而且深部的构造特征仅具有推测性质。地震勘探是探测深部地质构造最有效的地球物理勘探方法之一。利用地震探测获得了深达千余m的地质剖面,并从区域构造研究入手,划分了临潼-长安断裂与周至-户县凹陷、骊山凸起的分界,确定了临潼-长安断裂的总体剖面构造特征。

The Lintong-Changan fault is located in loess area, which is researched usually with surface or remote geologic survey methods due to poor stability of loess. Because of influence of landslide and wet subsidence of loess plateau, the structural characters of fault profile is limited by depth and poor reliability. Especially the struc- tural property at deep depth is only inferred. The seismic survey is considered as one of most effective survey methods for detecting deep structures. The boundaries among Lintong-Changan fault, Zhouzhi-Huxian depression and Lishan Salient are identified, and the structural characters of Lintong-Changan fault profile are determined with seismic survey and regional structural study.