| 激发极化法的“饱和效应”问题 |
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| 引用本文： | 王庆乙.激发极化法的“饱和效应”问题[J].地球物理学报,1977,20(2):150-156. |
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| 作者姓名： | 王庆乙 |
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| 摘 要： | 西格尔（H.O.Seigel）从理论计算得到导电颗粒含量为25％的极化球体有最大异常,因此认为:激发极化法只宜于寻找中等浸染程度的矿体,对于含量很高的矿体或良导致密型矿体,激发极化法是不行的。据称这种“饱和效应”的理论得到野外结果的证实。 本文根据我国激发极化法在良导致密型矿体上大都能获得明显视极化率异常的事实,说明西格尔的“饱和效应”理论与事实不符。本文认为良导致密型极化体不存在“饱和效应”问题,激发极化法对它们的勘探也是有效的。可能由于西格尔把低含量理论公式,不计条件地推导到高含量、甚至良导矿体,因此他的结论是错误的。本文最后讨论了电阻率因素对浸染型球体视极化率强度的影响。
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| 关 键 词： | 激发极化法 饱和效应 导电颗粒 视极化率 浸染型 西格尔 围岩电阻率 异常强度 致密型 极化球体 |
| 收稿时间： | 1975-10-24 |
ON THE SATURATION EFFECT OF THE INDUCED POLARIZATION METHOD |
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| WANG QING-YI.ON THE SATURATION EFFECT OF THE INDUCED POLARIZATION METHOD[J].Chinese Journal of Geophysics,1977,20(2):150-156. |
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| Authors: | WANG QING-YI |
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| Abstract: | From theoretical calculations, H. O. Seigels1] has shown that a spherical polarized body with the content of conductive particles up to as much as 25% will give the maximum IP anomalies. Hence, it is considered that the IP method is only suitable for exploration of disseminated ore bodies of medium ore content and not for ore bodies of high ore content or of the highly conductive massive type. Moreover, as reported, this saturation effect has also been confirmed in field observations.However, according to our field experience in China, rather fine IP anomalies can be obtained on highly conductive and massive ore bodies in most cases. In this paper, we try to show that saturation effect of induced polarization does not exist. It is believed that the IP method is equally applicable to the exploration of highly conductive and massive ore bodies. The theoretical conclusion of Seigel probably comes from the extension of the formulas for ore bodies with low ore content to those with high ore content without taking into consideration of the change of conditions. Finally, the influence of electrical resistivity on the apparent intensity of polarization of disseminated spherical ore bodies is discussed. |
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