可控源音频大地电磁测深在北京延庆盆地东部岩溶水勘查中的应用  

Application of CSAMT in the survey of karst water in the eastern Yanqing basin of Beijing

作　　者：雷晓东[1,2] 关伟[1] 郭高轩[3] 朱丽琼[1] 

机构地区：[1]北京市地质勘察技术院,北京102218 [2]北京市华清地热开发有限责任公司,北京102218 [3]北京市水文地质工程地质大队,北京100195

出　　处：《工程勘察》2014年第5期89-92,98,共5页Geotechnical Investigation & Surveying

基　　金：北京岩溶水资源勘查评价工程项目(BJYRS-KC-03-02)

摘　　要：北京延庆盆地东部是隐伏岩溶分布区,以往研究程度较低。查明该区深部地质结构对于评价岩溶水资源、为首都优选战略后备水源地具有重要意义。为此,在旧县村附近完成了两条可控源音频大地电磁测深(CSAMT)勘探剖面。根据二维反演结果,确定了旧县断裂的位置、查明了蓟县系岩溶含水层埋深,在此基础上实施了1眼勘探孔,结果表明CSAMT勘查成果与实钻结果具有很好的一致性。说明CSAMT可以有效查明隐伏岩溶区地质构造和岩溶含水层的分布情况,为优选井位和井身设计提供可靠的地球物理依据。The eastern Yanqing basin of Beijing is covered with buried karst formation. Few researches on the survey of karst have been done in this area. It is significant to investigate the deep geological structure to evaluate water resources of karst aquifer and select high quality strategical water sources for the capital of China. Two CSAMT （Controlled Source Audio-Magneto Telluric） profiles have been done near Jiuxian village. The location of Jiuxian fault and the depth of karst aquifer of Jixian system have been inferred through two-dimensional inversion method. Based on the analysis, one exploration borehole is drilled and it shows that the CSAMT interpretation result is consistent with drilling exploration finding. It is concluded that CSAMT is efficient to investigate the geological structure and the distribution of karst aquifers, and provide the reliable geophysical information for selecting borehole location and well design.

关 键 词：CSAMT 岩溶 延庆盆地 旧县断裂 蓟县系 

分 类 号：P631.325[天文地球—地质矿产勘探]