底青云^1,2,3,,
朱日祥^1,2,4,
薛国强^1,2,5,,,
殷长春⁶,
李貅⁷
1. 中国科学院大学, 北京 100049
2. 中国科学院地球科学研究院, 北京 100029
3. 中国科学院页岩气和地质工程重点实验室, 中国科学院地质与地球物理研究所, 北京 100029
4. 岩石圈演化国家重点实验室, 中国科学院地质与地球物理研究所, 北京 100029
5. 中国科学院矿产资源研究重点实验室, 中国科学院地质与地球物理研究所, 北京 100029
6. 吉林大学地球探测科学与技术学院, 长春 130026
7. 长安大学地质工程与测绘学院, 西安 710054

基金项目: 深地资源勘查开采重点专项(2018YFC0603200), 国家重大科技基础设施项目《极低频探地(WEM)工程》地下资源探测分系统, 国家公益性行业专项《深部探测技术与实验研究》中"地面电磁探测(SEP)系统研制"项目(201011079)和国家重大科研装备研制项目"深部资源探测核心装备研发"(ZDYZ2012-1)联合资助


详细信息

作者简介: 底青云, 女, 1964年生, 研究员, 主要从事电磁法理论方法与装备技术研究.E-mail:qydi@mail.iggcas.ac.cn

通讯作者: 薛国强, 男, 1966年生, 研究员, 主要从事瞬变电磁理论与应用研究.E-mail:xueguoqiang@mail.iggcas.ac.cn

中图分类号: P631

收稿日期:2018-11-05
修回日期:2019-01-31
上线日期:2019-06-05

New development of the Electromagnetic (EM) methods for deep exploration

DI QingYun^1,2,3,,
ZHU RiXiang^1,2,4,
XUE GuoQiang^1,2,5,,,
YIN ChangChun⁶,
LI Xiu⁷
1. University of Chinese Academy of Sciences, Beijing 100049, China
2. Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China
3. Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
4. State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
5. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
6. College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China
7. School of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China


More Information

Corresponding author: XUE GuoQiang,E-mail:xueguoqiang@mail.iggcas.ac.cn

MSC: P631

--> Received Date: 05 November 2018
Revised Date: 31 January 2019
Available Online: 05 June 2019


摘要
摘要:诸多研究表明我国深部资源潜力巨大，但目前的开发开采深度普遍停留在500 m以浅，开展"攻深探盲"是构建国家资源安全体系的有效途径.应用最先进的科学技术手段，提取深部地质信息，已成为我国当前地球物理科学研究的发展方向.作为地球物理学的重要分支，电磁法是矿产资源探查的主体手段之一.在分析我国现阶段航空、地面及海洋电磁探测技术进展的基础上，本文重点说明了极低频电磁法（简称WEM法），多通道瞬变电磁法（简称MTEM）和电性源短偏移瞬变电磁法（简称SOTEM）等电磁探测新技术.WEM法建立一套包括岩石层、大气层和电离层在内的全空间电磁传播理论，通过新研制的观测系统，获取地下10 km的地电信息；MTEM方法是地下埋深4 km目标体精细勘查的有效手段；SOTEM实现地下1.5 km深度范围内目标体的精细探测.通过多种电磁探测技术组合，可实现地下10 km深度范围内多尺度探测，达到"望远镜+放大镜+显微镜"探测效果.同时，本文指出进一步研发与新方法配套的装备、资料处理技术和大数据人工智能识别等将是我国电磁法未来的发展方向.
关键词: 深部资源勘查/
极低频电磁法/
多通道瞬变电磁法/
短偏移瞬变电磁法

Abstract:Many studies have been carried out to demonstrate the huge potential of mineral resources greater than 500m. Therefore, it is of crucial importance to design an instrument locally for deep seated targets. Electromagnetic (EM) method is an important means for mineral exploration. With the development of airborne, surface and marine EM detection technology in China, Wire-less Electromagnetic Method (WEM), Multi-channel Transient Electromagnetic Method (MTEM), as well as Short-offset Transient Electromagnetic method (SOTEM) are focused on in this paper. The WEM wave propagates through lithosphere, atmosphere and ionosphere to probe 10 km-depth geo-electric structures underground; MTEM method is proven as an effective means for burying the target body; SOTEM reaches a depth of 1.5 km with accurate detection. The combination of various electromagnetic technologies can achieve multi-scale detection within a depth of 10 km and realize the effect of "telescope-magnifier-microscope". It also pointed that the future direction of electromagnetic method is in terms of equipment, data processing and big data information.
Key words:Deep resource exploration/
Wire-less Electromagnetic Method (WEM)/
Multi-channel Transient Electromagnetic Method (MTEM)/
Short-offset Transient Electromagnetic method (SOTEM)



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