时间域航空电磁法在水文地质勘查中的应用研究  

A study on the application of ATEM in hydrogeological investigation

作　　者：杨淼鑫 熊盛青 梁盛军 谭捍东[2] Yang Miao-xin;Xiong Sheng-qing;Liang Sheng-jun;Tan Han-dong(China Aero Geophysical Survey&Remote Sensing Center for Natural&Resources,Beijing 100083,China;School of Geophysics and Information Technology,China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国自然资源航空物探遥感中心,北京100083 [2]中国地质大学(北京)地球物理与信息技术学院,北京100083

出　　处：《Applied Geophysics》2023年第4期411-421,669,共12页应用地球物理（英文版）

基　　金：supported by China Geological Survey project“Resources and Environment Bearing Capacity of Xiongan New Area and Construction of Transparent Xiongan Digital Platform”(China Aero Geophysical Survey&Remote Sensing Center for Natural&Resources)(No.20201200000180505).

摘　　要：时间域航空电磁法具有机动灵活、更适用于地形复杂区域进行大面积勘探等优点,是一种高效的地球物理勘查方法,该方法广泛应用于各个领域,具有广阔的应用前景。工作区人文干扰大,地面物探开展工作困难。通过时间域航空电磁法在空中探测,结合地面物探勘查工作,提高了该区的水文地质研究程度,同时为区内基础地质研究提供地球物理资料。本文所使用的观测系统为AeroTEM-IV时间域航空电磁系统,将测量数据转换为电导率深度信息,结合地质资料对该区的电性结构进行分析。利用水文测井解释成果验证航空电磁数据的可靠性;为提高解释结果的准确性,结合航空磁力数据进行综合解释;对全区数据进行转换计算后,得到反映区内电性分布的三维数据体,推断出第四系地层厚度以及含水体分布。研究和解释结果表明时间域航空电磁法可以作为水文地质调查和基础地质调查中的一种有效手段,是地面物探工作的有效补充。Airborne time-domain electromagnetic(ATEM)which is suitable for large-scale exploration in complex terrain areas is a high-efficiency,flexible geophysical investigation technique widely applied in various fields of work with broad application prospects.It is diffcult to carry out ground geophysical exploration because of the great human disturbance in the study area.By applying ATEM in the air,together with ground geophysical investigation efforts,we were able to greatly improve the hydrogeological research degree of the area and provide useful geophysical data for the fundamental geological research there.The observation system used in our study was an AeroTEM-IV system.The survey data were converted into conductivity depth information,which was used together with existing geological data to examine the electrical structure of the area.By the hydrogeological logging interpretation result,we validated the reliability of the AEM data;comprehensive interpretation was also conducted using airborne magnetic(AM)data to improve the accuracy of the interpretation result.After converting the data across the area,we yielded a three-dimensional data body representing the electrical distribution in the area,with which we inferred the Quaternary formation thickness and aquifer distribution there.Our research and interpretation results confrm that ATEM can be used as a useful means for hydrogeological survey and fundamental geological investigation.It is an effective supplement to ground geophysical exploration.

关 键 词：时间域航空电磁法 电导率深度成像法 第四系地层厚度 含水体分布 

分 类 号：P641.7[天文地球—地质矿产勘探] P631.325[天文地球—地质学]