音频大地电磁测深法在深部地热构造勘查中的应用
Application of Audio Magnetotelluric Sounding in Deep Geothermal Structure Exploration
汪名鹏1
作者信息
- 1. 华北水利水电大学地球科学与工程学院,河南 郑州 450045;江苏省水文地质工程地质调查大队,江苏 淮安 223005
- 折叠
摘要
为探测江苏泗洪县柳山湖景区的深部地热构造,搜集已有的地质地球物理资料和已知勘探钻孔资料,布置了 14条音频大地电磁测深(AMT)测线,通过资料采集、预处理、反演,得到了研究区2 000 m以浅地质体电阻率空间分布情况.勘探结果表明:研究区存在较好的低阻分布带,且连续性好,推测发育两条深部构造断裂带f1 和f2,其中f2 断裂带规模较大,破碎带中含水,而断裂带上部为完整-较完整的高阻层,可能是良好的盖层.因此,推测深部断裂破碎带f2 可能是良好的含水和储水通道,建议在构造带低阻异常中心位置重点研究,为下一步钻孔布设提供依据.
Abstract
In order to investigate the deep geothermal structure in Liushan Lake Scenic Area,Sihong County,Jiangsu Province,geological and geophysical data and known exploration borehole data were collected,14 Au-dio Magnetotelluric Sounding(AMT)survey lines were laid,and the resistivity distribution of the shallow geo-logical body at 2000 m in the study area was obtained through data acquisition,pre-processing and inversion.The exploration results show that there was a good low resistance distribution zone in the study area with good continuity,and two deep structural fault f1 and f2 are inferred.Among them,fault f2 is presumed to be large in scale and contains water in the fracture zone,while the upper part of the fracture zone is a complete-more com-plete high-resistance layer,which may be a good cover layer.Therefore,it is speculated that the deep fracture zone f2 has good water-bearing and storage channels,and it is suggested to focus on the location of the low resis-tance anomaly in the tectonic zone to provide a basis for the next drilling placement.
关键词
音频大地电磁测深法(AMT)/地热勘查/郯庐断裂带/深部构造/柳山湖Key words
Audio Magnetotelluric Sounding(AMT)/geothermal exploration/Tancheng-Lujiang fault zone/deep structure/Liushan lake引用本文复制引用
基金项目
江苏省自然资源厅、江苏省财政厅2017年地质勘查专项资金项目(苏财建[2017]160号)
出版年
2024
国家科技期刊平台
NSTL
万方数据