| 双频道频谱激电非线性效应研究 |
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| 引用本文： | 何继善,李大庆.双频道频谱激电非线性效应研究[J].地球物理学报,1995,38(5):670-675. |
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| 作者姓名： | 何继善 李大庆 |
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| 作者单位： | 中南工业大学地球物理勘查新技术研究所, 长沙 410083 |
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| 摘 要： | 利用双频道激发极化法，在封闭条件下和三维大水槽中，对４０余块各种天然矿物标本进行了频谱激电非线性效应研究．实验结果和理论分析表明，当电流密度增加到一定程度时，将出现激电非线性现象．用双频道频谱激电方法，将得到锯齿状频谱曲线．不同类型的矿物，锯齿状频谱曲线具有不同的特征，为评价激电异常源性质提供了新方法．
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| 关 键 词： | 双频道激电 非线性效应 锯齿状频谱曲线 |
| 收稿时间： | 1995-05-02 |
NONLINEAR EFFECT OF DUAL-FREQUENCY IP SPECTRUM |
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| HE JI-SHAN,LI DA-QING,TANG JING-TIAN.NONLINEAR EFFECT OF DUAL-FREQUENCY IP SPECTRUM[J].Chinese Journal of Geophysics,1995,38(5):670-675. |
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| Authors: | HE JI-SHAN LI DA-QING TANG JING-TIAN |
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| Affiliation: | Institute of Geophysics, Central South University of Technology, Changsha 410083 |
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| Abstract: | Experiments were carried out on more than 40 various mineral specimen with dual-frequency IP instruments in closed condition and 3-D water tank in order to study the nonlinear effect of the dual-frequency IP spectrum.Comparision of the experimental results with theoretical analysis shows that sawtooth feature appears on the dual-frequency IP spectral curves when the induced current density is increased to a certain value,and the feature is different for different minerals.This would propose a new possible methods to evaluate IP anomalies using the dual-frequency IP method. |
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| Keywords: | Dual-frequency IP method Nonlinear effect Sawtooth feature |
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