| TEM中心回线法瞬变磁场求取和全区视电阻率计算 |
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| 引用本文： | 许建荣,李爱勇,杨生.TEM中心回线法瞬变磁场求取和全区视电阻率计算[J].地质与勘探,2008,44(6):62-68. |
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| 作者姓名： | 许建荣 李爱勇 杨生 |
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| 作者单位： | 1. 中南大学信息物理工程学院,长沙,410083;江苏省有色金属华东地质勘查局,南京,210007
2. 有色金属矿产地质调查中心,北京,100012 |
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| 基金项目： | 全国危机矿山接替资源找矿项目(编号:200799089)资助 |
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| 摘 要： | 依据TEM法中心回线装置瞬变电磁场的衰减规律,给出了由实测的dB/dt求取瞬变磁场B的简单方法.详细推导了发射电流为斜阶跃波条件下由B迭代反演全区视电阻率的方法.为提高计算精度和速度,对计算过程中的积分、求导推导了解析表达式和采用标准数据库的方法计算含有概率积分的函数.对实测资料进行了计算,通过算例进行了验证和分析.
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| 关 键 词： | 瞬变电磁法 中心回线装置 瞬变磁场 全区视电阻率 斜阶跃波形 |
CALCULATION OF TRANSIENT MAGNETIC FIELD AND ALL TIME APPARENT RESISTIVITY BASED ON CENTRAL TEM LOOPS METHOD |
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| XU Jian-rong,LI Ai-yong,YANG Sheng.CALCULATION OF TRANSIENT MAGNETIC FIELD AND ALL TIME APPARENT RESISTIVITY BASED ON CENTRAL TEM LOOPS METHOD[J].Geology and Prospecting,2008,44(6):62-68. |
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| Authors: | XU Jian-rong LI Ai-yong YANG Sheng |
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| Institution: | 1.School of Info-physics Engineering;Central South University;Changsha 410083;2.Eastern China Bureau of Nonferrous Geological Exploration;Nanjing 210007;3.China Nonferrous Metals Resource Geological Survey;Beijing 100012 |
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| Abstract: | Accorded on the attenuation regime of central loop unit TEM field,the explicit calculation method of transient magnetic field B,from dB/dt measurement was given.The method,which inverses the all-time apparent resistivity from B iteration,under the slanting wave transmission current was deduced.The integral and derivation resolution expression was deduced,in order to promote the calculation precision and speed,as well as the calculation of probability integral function using standard database method.Then thr... |
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| Keywords: | TEM central loops unit transient magnetic field all-time apparent resistivity slanting wave |
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