| 利用大地电磁三维反演方法获得二维剖面附近三维电阻率结构的可行性 |
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| 引用本文： | 林昌洪,谭捍东,佟拓.利用大地电磁三维反演方法获得二维剖面附近三维电阻率结构的可行性[J].地球物理学报,2011,54(1):245-256. |
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| 作者姓名： | 林昌洪 谭捍东 佟拓 |
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| 作者单位： | 1. 中国地质大学地质过程与矿产资源国家重点实验室,北京 100083;
2. 中国地质大学地下信息探测技术与仪器教育部重点实验室,北京 100083;
3. 中国地质大学(北京)地球物理与信息技术学院,北京 100083 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家自然科学基金项目，中央高校基本科研业务费专项资金项目，教育部新世纪优秀人才计划 |
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| 摘 要： | 大地电磁野外实测数据月前大多为二维剖面数据.如何反演这些二维剖面数据获得较为接近实际地电情况的结果,是多数大地电磁工作者关心的问题.我们通过对理论模型的三维响应进行分析和对合成数据及实测资料的反演结果进行对比研究,讨论了利用三维反演的方法来获得大地电磁二维剖面附近三维电阻率结构的可行性.结果表明:可用三维反演的方法来解...
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| 关 键 词： | 大地电磁反演 二维 三维 张量数据 |
| 收稿时间： | 2010-03-03 |
The possibility of obtaining nearby 3D resistivity structure from magnetotelluric 2D profile data using 3D inversion |
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| LIN Chang-Hong,TAN Han-Dong,TONG Tuo.The possibility of obtaining nearby 3D resistivity structure from magnetotelluric 2D profile data using 3D inversion[J].Chinese Journal of Geophysics,2011,54(1):245-256. |
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| Authors: | LIN Chang-Hong TAN Han-Dong TONG Tuo |
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| Affiliation: | 1. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;
2. Key Laboratory of Geo-detection (China University of Geosciences), Ministry of Education, Beijing 100083, China;
3. School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China |
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| Abstract: | Currently, most of MT(magnetotelluric) data are still collected on 2D profiles. The issue that most MT researchers concern is how to invert these 2D profile data to get better results, which are closer to the real structure. Based on the analysis of 3D tensor impedance response generated from the test models and on the study of the inversion results of synthetic data and field data, we discuss the possibility of obtaining nearby 3D resistivity structure from magnetotelluric 2D profile data using 3D inversion. The results show that it is possible to interpret 2D profile data using 3D inversion method. Not only a reasonable image beneath the profile but also reasonable pictures of nearby 3D structure which can not be got by 2D inversion can be obtained using all tensor elements of the 2D profile data in the 3D inversion. The synthetic examples show that the on-diagonal elements have special effect on recovering the distribution of 3D abnormity near the profile. Therefore, all the tensor elements are suggested to be used in 3D inversion to interpret the profile data. |
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| Keywords: | Magnetotelluric inversion 2D 3D Tensor elements |
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