The causes of induced electrical polarization include not only the polarization of metal‐solution interfaces, but also effects associated with the coupling of different flows. Electro‐osmotic, thermal electric, and ion diffusion effects are among such examples. A study of the physical properties of geologic materials indicates that only electrode interface and diffusion flow phenomena are important sources of induced polarization effects. It was attempted to find characteristic differences between these two phenomena. Theoretical and experimental considerations show that the kinetic processes involved are quite similar in the two cases. This leads to difficulties in identifying the polarizing agent from electrical measurements, although the effects of well mineralized zones are easily recognized.

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The problem of delineating cultural refuse sites (dumps) arises in civil engineering studies. Induced polarization measurements have been successfully applied in several cases. Laboratory tests on synthetic samples indicate that the effect is due to the metal content of the dumps. The method may be applicable to archeological investigations.

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