Complex Resistivity of Synthetic Sulphide Bearing Rocks*

The complex resistivity of synthetic samples has been measured over the frequency range 0.01 Hz to 1.0 MHz. The synthetic samples were made of a quartz matrix and sulphide particles. Grain sizes, volume fractions, and sulphide particles of different nature were used. The samples were saturated to different degrees, with different types of electrolyte. The results obtained were used to check the validity of the theoretical electrochemical model developed by Wong (1979). This model fits the experimental data reasonably well in the frequency range where the dispersion and the phase maxima occur. Against the model expectations, the experiment did not duplicate the Debye‐form of spectra because most of the common metals are oxidized to the ionic form and an electrochemical charge transfer reaction occurs at the interface. The model prediction regarding the effect of the distribution of the grain radii on the complex resistivity could not be duplicated experimentally.