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  2. 地质与地球物理研究所
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Three-dimensional modeling of ground-airborne transient electromagnetic responses of typical models based on the finite difference approach

文献类型：期刊论文

作者Chang, Jianghao2,3,4,5; Wu, Xin2,3,4; Lei, Kangxin2,3,4; Lv, Pengfei2,3,4; Zhao, Yang2,3,4; Meng, Qingxin1
刊名JOURNAL OF APPLIED GEOPHYSICS
出版日期2022-02-01
卷号197页码:13
关键词Ground-airborne transient electromagnetic method Numerical modeling Finite-difference time-domain method Typical models
ISSN号0926-9851
DOI10.1016/j.jappgeo.2022.104545
英文摘要Ground-airborne transient electromagnetic (GATEM) methods combine the advantages of ground TEM and airborne TEM, which can simultaneously fulfill the requirements of detection depth and work efficiency. In this study, the GATEM responses of typical models were numerically modeled using the finite-difference time-domain (FDTD) approach. The traditional FD approach of TEM uses the upward-continuation boundary condition at the surface of the earth but does not model complex terrains with an air layer. In this study, the FDTD approach was used to directly mesh and calculate the air layer. Specifically, based on the quasi-static conditions of the electromagnetic field and the frequency spectral features of the transmitting current waveform, the choice method for obtaining the fictitious permittivity in the air layer was studied, and the stability problem in the calculation of the air layer was addressed. The convolutional perfectly matched layer boundary conditions were used at the air and underground boundaries to improve the accuracy of the solution in the late field. Moreover, the results of this approach were compared with the analytical solution and the results of other algorithms, and the accuracy and reliability of the approach were verified. Next, this approach was used to perform three-dimensional forward simulations on the GATEM responses of typical models such as the 3-D body model, rugged topography model, and low-resistivity overburden model. The modeling results show that the GATEM response is significantly affected by flight altitude in the early stage, whereas the late response is less affected by the flight altitude. The sensitivity of the GATEM response was smaller than that of the ground TEM. Signal reversal is observed in the partial differential Bz/ partial differential t response curve under the influence of a hill. However, the influence of the hill can be treated as a background field in the late period. The partial differential Bz/ partial differential t curve observed above the goaf is higher than that without the goaf, but the difference between them will be reduced due to the influence of the low-resistivity overburden and measurement noise.
WOS关键词TIME-DOMAIN ; MAXWELLS EQUATIONS ; GREATEM SURVEY ; EXPLORATION ; SYSTEM ; BODY
资助项目Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences[YJKYYQ20190004] ; Natural Science Foun-dation of China (NSFC)[42030106] ; Natural Science Foun-dation of China (NSFC)[42074121] ; China Postdoctoral Science Foundation[2020M670442] ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources[KLGEPT201907]
WOS研究方向Geology ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000791242100002
出版者ELSEVIER
资助机构Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Scientific Equipment In-strument and Development Project of the Chinese Academy of Sciences ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; Natural Science Foun-dation of China (NSFC) ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources ; Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources
源URL[http://ir.iggcas.ac.cn/handle/132A11/105918]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Wu, Xin
作者单位1.Chinese Acad Geol Sci, Inst Geophys & Geochem Explorat, Key Lab Geophys Electromagnet Probing Technol, Minist Nat Resources, Langfang 065000, Hebei, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
5.Hebei GEO Univ, Hebei Key Lab Strateg Crit Mineral Resources, Shijiazhuang 050031, Hebei, Peoples R China
推荐引用方式
GB/T 7714		 Chang, Jianghao,Wu, Xin,Lei, Kangxin,et al. Three-dimensional modeling of ground-airborne transient electromagnetic responses of typical models based on the finite difference approach[J]. JOURNAL OF APPLIED GEOPHYSICS,2022,197:13.
APA Chang, Jianghao,Wu, Xin,Lei, Kangxin,Lv, Pengfei,Zhao, Yang,&Meng, Qingxin.(2022).Three-dimensional modeling of ground-airborne transient electromagnetic responses of typical models based on the finite difference approach.JOURNAL OF APPLIED GEOPHYSICS,197,13.
MLA Chang, Jianghao,et al."Three-dimensional modeling of ground-airborne transient electromagnetic responses of typical models based on the finite difference approach".JOURNAL OF APPLIED GEOPHYSICS 197(2022):13.

入库方式： OAI收割

来源：地质与地球物理研究所

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