白龙江流域隐伏活断层的综合地球物理勘探

白龙江流域构造活动频繁,是本区自然灾害频发的重要控制因素之一.众多学者对该区域的构造运动及影响进行了大量研究,但针对本区隐伏活断层勘查的例子较少.针对白龙江流域隐伏活断层,笔者通过高密度电法、地震反射法、地震折射层析法三种手段进行有效组合勘查,形成了一套行之有效的、适用于白龙江流域隐伏活断层勘查的综合物探方法,该方法不仅查明了断层的性质,还证实了断层的活动性.分别以含水断层与非含水断层两种类型进行举例说明,两者的地球物理特征既有相似点也有区别,所提出的综合物探技术对这两类断层均有较好的勘查效果,可以广泛应用于白龙江流域隐伏活断层的勘查工作,对其他地区的勘查也有一定的借鉴意义.

Comprehensive geophysical exploration for buried active faults in the Bailong River Basin

Tectonic activities freely occurred in the Bailong River Basin, which is one of the most significant controlling factors for frequent natural disasters in the area. Many scholars have performed significant research on the tectonic activities and associated influence in the study area. However, few of the explorations were made on buried active faults. In this paper, based on three methods, i.e., the high-density resistivity method, seismic reflection method, and seismic refraction tomography method, we propose a comprehensive geophysical exploration method for buried active faults in the Bailong River Basin. Through the method, we can not only identify the features of faults but also confirm their activities. The water-bearing fault and non-water-bearing fault were taken as examples, and similarities and differences in the geophysical characteristics of the two types of faults were found. The comprehensive geophysical prospecting method proposed in this paper has a good exploration effect on the two types of faults. Hence, it can be widely applied to the exploration of buried active faults in the Bailong River Basin and has certain reference significance for explorations of other areas.