超高密度电阻率法在隐伏断层探测中的应用  

The application of ultra-high density resistivity method to the detection of buried fault

作　　者：李俊杰 何建设 严家斌[2] 荣鑫 李阳 

机构地区：[1]浙江省水利水电勘测设计院,浙江杭州310002 [2]中南大学地球科学与信息物理学院有色资源与地质灾害探查湖南省重点实验室,湖南长沙410083

出　　处：《物探与化探》2016年第3期624-628,共5页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(40874055);湖南省自然科学基金资助项目(14JJ2012)

摘　　要：将超高密度电阻率法用于某水库坝址区隐伏断层探测。介绍了测区地质及测线布置情况,采用汉克尔变换方法模拟了层状介质模型视电阻率响应,通过反演计算结合地质钻孔资料,确定了基岩埋深及区域断层的走向。断层破碎带在电阻率剖面中呈现明显斜立条带状低阻异常,其产状与地质及钻孔资料一致,验证了超高密度电法探测的有效性。This paper deals with the application of ultra-high density resistivity method to the detection of buried fault in the dam area of a reservoir,and describes geological situation of the survey area and the layout of surveying line as well as the detection mechanism of the method. On such a basis,apparent resistivity response of layered medium models is simulated by Hankel transform method.Based on inversion calculation combined with the geological drilling data,the buried depth of bedrock and the trend of regional fault are determined.The fault fracture zone presents obvious vein-like low resistivity anomalies in the middle of resistivity sections,which is consistent with the geological and drill hole data,thus verifying the effectiveness of the ultra-high density resistivity method.

关 键 词：超高密度电法 水库 隐伏断层 汉克尔变换 

分 类 号：P631[天文地球—地质矿产勘探]