跨断层综合地质剖面法在隐伏断层野外地质调查中的研究与应用——以瑞昌-武宁断裂为例

摘要

The paper presents cross-fault comprehensive geological profiling method on buried faults based on field geological investigation.The analysis mainly depends on information such as geomorphologic surface of the same formation on both sides (quaternary) which demonstrates certain vertical height difference or horizontal discontinuity caused by fault movement and the opposite direction of elevation and formation.The paper also determines the active age and moving characteristics of the fault.The paper analyzes the applicable conditions and influencing factors of the method,points out that the complete quaternary development at the site under research is the key to cross-fault comprehensive geological profiling method.Finally,the application of the method on the Ruichang-Wuning fault is compared with the traditional buried fault method research,and the results are consistent,reliable and practical.%在从事多年野外地质调查研究的基础上,对隐伏断层的野外地质调查提出了跨断层综合地质剖面法.该方法主要是依据断层错动造成两侧相同地层(主要是第四系)相应地貌面产生垂直向高差或水平向的不连续,从而使两侧相应地层地貌面的高程和地层的相对运动发生变化.依据这些信息判断断层活动时代与运动性质.分析了该方法的适用条件和影响因素,指出研究场地第四系发育齐全是跨断层综合地质剖面法的关键.最后将该方法在瑞昌-武宁断裂研究中的实际应用得到的结果与传统隐伏断层研究方法的结果进行对比分析,其结果的一致性表明了该方法在研究及工程应用中的可靠性和实用性.