Three-dimensional axially anisotropic inversion of magnetotelluric phase tensor and tipper data
文献类型：期刊论文
| 作者 | Kong WenXin3,4; Yu Nian1,3; Li Xin2; Zhang XueJian1; Chen Huang3,4; Li TianYang3,4; Wang EnCi1 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2023-09-01 |
| 卷号 | 66期号:9页码:3928-3946 |
| 关键词 | Magnetotellurics Anisotropy Galvanic distortion Phase tensor Inversion |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg2023R0040 |
| 英文摘要 | Electrical anisotropy is ubiquitously observed in the crust and upper mantle, which is a key and difficult problem in the practical application of magnetotelluric method. In the meanwhile, galvanic distortion caused by local scatters near surface can further exacerbate the ambiguity and uncertainty of anisotropic inversion. In order to suppress the influence of galvanic distortion, this paper implements a three-dimensional inversion algorithm for magnetotelluric phase tensor and tipper data to obtain the axially anisotropic structure of the underground medium. In this algorithm, the staggered grid finite difference method is used to solve the forward modeling problem, while the non-linear conjugate gradient method is applied to implement inversion. Synthetic tests show that the three-dimensional anisotropic inversion of phase tensor and tipper data not only resolves the actual electrical features of the subsurface structure, but also suppresses the artifacts caused by fitting the galvanic distortion effect. Since the phase tensor and tipper data do not contain amplitude information, the choice of the prior model has a great influence on the recovered resistivity value, but the change of the initial model basically does not affect the inversion results. In order to further verify the effectiveness of the algorithm, it is applied to 109 long-period magnetotelluric data collected by the USArray project in the Northwest of the United States. The inversion result shows that using phase tensor and tipper is better for recovering the shallow-depth structure than impedance and can obtain results more consistent with surface geology. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001064464700026 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74923]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Yu Nian |
| 作者单位 | 1.Chongqing Univ, Sch Elect Engn, Chongqing 400044, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 3.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China 4.Chongqing Univ, Sch Resources & Safety Engn, Chongqing 400044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kong WenXin,Yu Nian,Li Xin,et al. Three-dimensional axially anisotropic inversion of magnetotelluric phase tensor and tipper data[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2023,66(9):3928-3946. |
| APA | Kong WenXin.,Yu Nian.,Li Xin.,Zhang XueJian.,Chen Huang.,...&Wang EnCi.(2023).Three-dimensional axially anisotropic inversion of magnetotelluric phase tensor and tipper data.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,66(9),3928-3946. |
| MLA | Kong WenXin,et al."Three-dimensional axially anisotropic inversion of magnetotelluric phase tensor and tipper data".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 66.9(2023):3928-3946. |
入库方式： OAI收割
来源：广州地球化学研究所
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