【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．更多还原

【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.更多还原