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物探与化探  2021, Vol. 45 Issue (5): 1329-1337    DOI: 10.11720/wtyht.2021.1566
  方法研究·信息处理·仪器研制 本期目录 | 过刊浏览 | 高级检索 |
基于三维有限元的航空大地电磁倾子响应特征
刘彦涛1,2,3(), 彭莉红1,2,3, 孙栋华1,2,3, 张伟盟1,2,3, 王海红1,2,3
1.核工业航测遥感中心,河北 石家庄 050002
2.中核集团铀资源地球物理勘查技术(重点实验室),河北 石家庄 050002
3.河北省航空探测与d遥感技术重点实验室,河北 石家庄 050002
Research on response characteristics of airborne magnetotelluric tipper based on three-dimensional finite element
LIU Yan-Tao1,2,3(), PENG Li-Hong1,2,3, SUN Dong-Hua1,2,3, ZHANG Wei-Meng1,2,3, WANG Hai-Hong1,2,3
1. Airborne Survey and Remote Sensing Center of Nuclear Industry, Shijiazhuang 050002, China
2. Key Laboratory of Uranium Resources Geophysical Exploration Technology, China Nuclear Industry Group Company, Shijiazhuang 050002, China
3. Hebei Key Laboratory of Airborne Survey and Remote Sensing Technology, Shijiazhuang 050002, China
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摘要 

倾子是航空大地电磁数据解释的重要参数,研究倾子响应特征对数据解释具有重要意义。文中介绍了航空大地电磁基本原理与ZTEM航空大地电磁数据采集系统,利用三维有限元方法对简单异常体倾子响应进行了模拟,分析测线与岩性分界面斜交情况下倾子Tx与倾子Ty的响应特征。研究结果表明:当测线与岩性分界面斜交时,倾子Tx与倾子Ty响应皆存在且对岩性分界面有所反映,随测线方向改变,倾子表现出相应规律。本文研究进一步加深了倾子对岩性分界面响应特征的理解,可为倾子资料解释提供参考与依据。

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刘彦涛
彭莉红
孙栋华
张伟盟
王海红
关键词 倾子航空大地电磁三维有限元ZTEM    
Abstract

Tippers are important parameters for the interpretation of airborne magnetotelluric data, and the study on the response characteristics of tippers is of great significance for the data interpretation. This study firstly introduces the basic principle of airborne magnetotelluric and ZTEM airborne magnetotelluric data acquisition system, then simulates the tipper response of the simple abnormal bodies using the three-dimensional finite element method, and finally analyzes the response characteristics of tippers Tx and Ty when the survey lines obliquely intersect with a lithologic interface. As indicated by the results, both Tx and Ty responded to the lithological interface in the case that the survey lines obliquely intersected with a lithologic interface. Meanwhile, the tipper exhibited corresponding laws with the change in the direction of the survey lines in that case. This study further deepens the understanding of the response of tipper to lithologic interfaces and will provide references and guidance for the interpretation of tipper data.

Key wordstipper    airborne magnetotelluric    three-dimensional finite element    ZTEM
收稿日期: 2020-12-14      出版日期: 2021-12-15
:  P631  
作者简介: 刘彦涛(1994-),男,助理工程师,硕士,主要从事航空电磁、航磁勘查研究工作。Email: liuyantao703@163.com
引用本文:   
刘彦涛, 彭莉红, 孙栋华, 张伟盟, 王海红. 基于三维有限元的航空大地电磁倾子响应特征[J]. 物探与化探, 2021, 45(5): 1329-1337.
LIU Yan-Tao, PENG Li-Hong, SUN Dong-Hua, ZHANG Wei-Meng, WANG Hai-Hong. Research on response characteristics of airborne magnetotelluric tipper based on three-dimensional finite element. Geophysical and Geochemical Exploration, 2021, 45(5): 1329-1337.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2021.1566      或      https://www.wutanyuhuatan.com/CN/Y2021/V45/I5/1329
Fig.1  ZTEM系统
Fig.2  频率-趋肤深度曲线
Fig.3  模型网格剖分示例
Fig.4  复杂地质模型示意
Fig.5  2个典型频率的磁场三分量变化趋势
Fig.6  三维模型示意
Fig.7  测线走向示意
Fig.8  测线a倾子低阻响应特征
Fig.9  测线b倾子低阻响应特征
Fig.10  测线c倾子低阻响应特征
Fig.11  测线a倾子高阻响应特征
Fig.12  测线b倾子高阻响应特征
Fig.13  测线c倾子高阻响应特征
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