| Description |
Modeling induced polarization (IP) phenomena is important for developing effective methods for remote sensing of subsurface geology. Two resistivity relaxation models have been developed to describe the IP effect. The Cole-Cole model was formulated empirically more than 50 years ago. A few of the parameters within this model are able to account for IP phenomena and can give useful information for the analysis of bulk rock formations. Forward modeling using synthetic data is done to analyze the three empirical variables of the Cole-Cole model. These empirical variables are the decay coefficient (C), chargeability (m), and the time constant ( ). The generalized effective-medium theory of induced polarization (GEMTIP) model is another resistivity model similar to the Cole-Cole model. However, the GEMTIP model attempts to characterize heterogeneous, multiphase, polarized media using the effective-medium approach and can consider many more useful parameters than the Cole-Cole model. Forward modeling is also done with synthetic data to analyze four GEMTIP parameters. These parameters are the surface polarizability coefficient (?), the decay coefficient (C), the inclusion volume fraction (f), and the ellipticity of the inclusions (E). Complex resistivity data was collected on several rock samples that contain disseminated sulfides, which are conducive to IP phenomena. |
