| 低阻覆盖层对高频大地电磁测深的影响 |
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| 引用本文： | 席振铢. 低阻覆盖层对高频大地电磁测深的影响[J]. 地质与勘探, 2011, 47(4): 673-678 |
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| 作者姓名： | 席振铢 |
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| 作者单位： | 中南大学地球科学与信息物理学院,湖南长沙,410083 |
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| 基金项目： | “十一五”国家科技支撑计划项目(2006BAB01B07)资助 |
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| 摘 要： | 低阻覆盖层对电磁波具有屏蔽效应，会降低高频大地电磁测深的探测能力。通过一维正演模拟，对无低阻覆盖层时探测能力和有低阻覆盖层时探测能力的变化进行对比研究，表明有低阻覆盖时，探测能力普遍下降；在相同探测能力条件下，高频大地电磁测深可探测异常体上覆围岩厚度与异常体厚度的比值，和围岩与异常体电阻率比值呈线性关系。通过綦江县某铁...
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| 关 键 词： | 高频大地电磁 低阻覆盖层 探测能力 EH-4 正演模拟 |
| 收稿时间： | 2010-10-26 |
| 修稿时间： | 2011-03-05 |
Effect of a Low-Resistivity Cover on High-Frequency Magnetotelluric Sounding |
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| XI Zhen-zhu. Effect of a Low-Resistivity Cover on High-Frequency Magnetotelluric Sounding[J]. Geology and Prospecting, 2011, 47(4): 673-678 |
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| Authors: | XI Zhen-zhu |
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| Affiliation: | XI Zhen-zhu,FENG Wan-jie,LI Rui-xue,CHEN Xing-peng(School of Geoscience and Info-physics,Central South University,Changsha,Hunan 410083) |
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| Abstract: | Because of the shielding effect on electromagnetic waves,the low-resistivity cover can reduce the detability of the high-frequency magnetotelluric sounding method.By one-dimensional forward modeling of models with and without a low-resistivity cover,we have made a comparative study on this issue.The result indicates that the detection ability generally decreases when the model is covered with a low-resistivity layer.And the ratio of the detecting thickness of the host overlying the target to the thickness o... |
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| Keywords: | high-frequency magnetotelluric sounding low-resistivity cover detectability EH-4 forward modeling |
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