Effective-medium modeling of the induced-polarization effect in multiphase artificial mineral rocks

Lin, Wei (University of Utah) | Burtman, Vladimir (University of Utah) | Zhdanov, Michael (University of Utah) | Endo, Masashi (TechnoImaging) | Takakura, Shinichi (National Institute For Rural Engineering)


Summary This paper demonstrates that the generalized effectivemedium theory of induced polarization (GEMTIP) can correctly represent the induced polarization (IP) phenomenon in the artificial rock samples. These samples were manufactured using pyrite and magnetite particles. The results of our study show that the conventional Cole-Cole model cannot adequately describe the IP effect in artificial rocks containing both the pyrite and magnetite. However, the GEMTIP model not only predicted the IP response correctly, but it also opens the possibility of discriminating between rock samples containing pyrite and magnetite, based on complex resistivity (CR) data. Based on the GEMTIP inversion results for a total of 35 artificial rock samples, we demonstrate that the GEMTIP model best represents the CR response of the artificial rock samples.