礼县-罗家堡断裂带浅部地球物理探测及新认识  

Shallow Geophysical Exploration and New Understanding of Lixian-Luojiabu Fault Zone

作　　者：谢兴隆[1] 任政委[1] 叶振南[1] 王高峰[1] 李秋辰 马雪梅[1] XIE Xinglong;REN Zhengwei;YE Zhennan;WANG Gaofeng;LI Qiuchen;MA Xuemei(Center for Hydrogeology and Environmental Geology Survey,CGS,1305 Qiyi Road,Baoding 071051,China)

机构地区：[1]中国地质调查局水文地质环境地质调查中心,河北省保定市071051

出　　处：《大地测量与地球动力学》2022年第1期82-87,共6页Journal of Geodesy and Geodynamics

基　　金：中国地质调查局地质调查项目(DD20190646)。

摘　　要：采取以地震反射法为主、高密度电法为辅的综合物探手段探测礼县-罗家堡断裂盐官至礼县段,总结断裂在该区域的波阻抗及电性方面的异常响应特征,尤其是高密度电法表现出"低阻背景、高阻条带"的典型异常标志,使得高密度电法在复杂地形追踪断裂成为可能。根据物探成果,明确断裂带的浅部空间组合模式,并给出断裂展布的精确位置,对断裂带的浅部构造特点及分布形成新认识。We adapt comprehensive geophysical means with seismic reflection as the main method and high density electrical method as the supplementary method and obtain relatively accurate detection results in the section from Yanguan to Lixian of the Lixian-Luojiabu fault. We summarize the abnormal response characteristics of wave impedance and electrical properties of faults in this region, especially the typical abnormal signs of ‘low resistance background and high resistance band’ presented by high-density electrical method, which make it possible to track faults in complex terrain by the high-density electrical method. Based on the results of geophysical exploration, we identify the shallow spatial combination mode of the fault zone, give the precise location of fault distribution, and gain a new understanding of the characteristics and distribution of shallow structure in the fault zone.

关 键 词：礼县-罗家堡断裂 浅部地球物理特征 地震反射 高密度电法 断裂展布 

分 类 号：P315[天文地球—地震学] P631[天文地球—固体地球物理学]