对频谱激电法中虚分量谱的一点认识

A View on the Imaginary Part Spectrum in Spectral Induced Polarization Method

本文结合标本测定和模拟实验结果,对不同条件下虚分量谱极值频率变化较大的原因进行了分析讨论.认为虚分量谱的“不稳定”实际上是极化体时间常数变化的客观反映.就反演频谱确定时间常数而言,相位谱并不比虚分量谱优越.

Based upon the results of sample measurements and model experiments, the cause for the large variation in the peak value of a imaginary part spectrum with frequency under different conditionsis analysed. It is believed that the 'unstability' of the imaginary part spectrum objectively reflects thechange of the time constant of a polarized body. So far as the determination of time constant by frequency spectrum inversion is concerned, the phase spectrum is not superior to the imaginary spectrum.