利用深浅地球物理探测技术识别达拉特断裂的方法研究

Study on the Method of Identifying Dalat Fault by Using Deep Geophysical Detection Technology

摘要: 在河套盆地内的达拉特旗，第四系沉积连续、完整，尤其是上部多为粉砂层或中细砂层，沉积物紧密。对于发育该盆地内的隐伏断裂的活动性位置及其时代的判定，除浅层地震勘探方法以外，还可以联合使用多种地球物理方法来对其位置和时代进行判定。本文就利用了电阻率测深法和探地雷达方法来共同判断断裂位置及活动时代。首先利用电阻率测深法对达拉特断裂位置进行定位，同时在电测深异常区段使用探地雷达进行从地表到地下15米深度范围的测量，以确定断层的上断点埋深，进而推断出断裂最新活动时代。

Abstract: In the Dalat Banner in the Hetao Basin, the Quaternary sediments are continuous and complete, especially the upper part is mostly silt layer or medium-fine sand layer, and the sediment is com-pact. In addition to the shallow seismic exploration method, a variety of geophysical methods can be used to determine the location and age of the active locations and their ages of the buried faults in the basin. In this paper, the resistivity sounding method and the ground penetrating radar method are used to jointly determine the location of the fault and the age of activity. Firstly, the position of the Dalat fault is located by the resistivity sounding method. At the same time, the ground penetrating radar is used to measure the depth of the 15 m depth from the surface to the ground in the abnormal section of the electrical sounding to determine the depth of the upper breakpoint of the fault, further inferred the latest activity era of the fracture.