Abstract: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.
XIE Xinglong,REN Zhengwei,YE Zhennan et al. Shallow Geophysical Exploration and New Understanding of Lixian-Luojiabu Fault Zone[J]. jgg, 2022, 42(1): 82-87.