3D CSAMT modelling in anisotropic media using edge-based finite-element method
文献类型：期刊论文
| 作者 | He, Guoli1,3; Xiao, Tiaojie2,3; Wang, Yun2; Wang, Guangjie1,3 |
| 刊名 | EXPLORATION GEOPHYSICS
 |
| 出版日期 | 2019-01-02 |
| 卷号 | 50期号:1页码:42-56 |
| 关键词 | CSAMT anisotropy modelling three-dimensional finite element |
| ISSN号 | 0812-3985 |
| DOI | 10.1080/08123985.2019.1565914 |
| 英文摘要 | Controlled-source audio-frequency magnetotellurics (CSAMT) is an important geophysical technique. Numerous studies have shown that the electrical anisotropy in the Earth cannot be ignored because it would probably lead to misinterpretations of electromagnetic data. It is necessary and meaningful to study CSAMT responses in three-dimensional (3D) electrical anisotropic media; therefore, we have developed an edge-based finite element method for 3D CSAMT forward modelling in generalised anisotropic media. The total electric field in this approach is decomposed into a primary electric field and a secondary electric field, and the Galerkin weighted residuals method is adopted to obtain the variational equation. The accuracy of this algorithm was initially validated by comparing solutions with those obtained in previous work on a 3D arbitrary anisotropic model. We then studied the responses of an oblique source as well as equatorial and axial configurations and the tensor source for anomalies with different Euler's angles. Several meaningful conclusions can be derived from this work and a synthetic model is developed; the results also confirm the validity of previous conclusions. This study shows that a tensor source is necessary for a CSAMT survey in 3D anisotropic media, and the anisotropic parameters of anomalies have complex and significant influences on CSAMT responses. |
| WOS关键词 | AUDIO-FREQUENCY MAGNETOTELLURICS ; TENSOR CSAMT ; CSEM DATA ; CONSTRAINED INVERSION ; EXPLORATION ; VECTOR ; RESPONSES ; AREA |
| 资助项目 | National Key Research and Development Project of China[2016YFC0600301] ; National Natural Science Foundation of China[41425017] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000478063700005 |
| 出版者 | TAYLOR & FRANCIS LTD |
| 资助机构 | National Key Research and Development Project of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Natural Science Foundation of China ; National Key Research and Development Project of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/92924]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xiao, Tiaojie |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Geochem, Guiyang 550081, Guizhou, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Guoli,Xiao, Tiaojie,Wang, Yun,et al. 3D CSAMT modelling in anisotropic media using edge-based finite-element method[J]. EXPLORATION GEOPHYSICS,2019,50(1):42-56. |
| APA | He, Guoli,Xiao, Tiaojie,Wang, Yun,&Wang, Guangjie.(2019).3D CSAMT modelling in anisotropic media using edge-based finite-element method.EXPLORATION GEOPHYSICS,50(1),42-56. |
| MLA | He, Guoli,et al."3D CSAMT modelling in anisotropic media using edge-based finite-element method".EXPLORATION GEOPHYSICS 50.1(2019):42-56. |
入库方式： OAI收割
来源：地质与地球物理研究所
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