礼县-罗家堡断裂带浅部地球物理探测及新认识

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。

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

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.