Method for extracting IP information from grounded-wire transient electromagnetic response

A method for extracting induced polarization (IP) information in a transient electromagnetic (TEM) response of a grounded-wire source, comprising the following steps:

• 1) obtaining subsurface resistivity through inversion of a vertical magnetic field less influenced by an IP effect involves analyzing magnetic field data collected from a grounded-wire TEM method;
• 2) obtaining an electric field response not influenced by the IP effect based on forward modeling of the obtained underground electrical structure involves simulating the behavior of electric fields within the subsurface;
• 3) removing the influence of the IP effect on an observed response to obtain a pure IP response;
• and
• 4) inverting the obtained IP response to obtain IP information of polarizability, a frequency dependence, and a time constant;
• wherein the method further comprises:
• applying the IP information of the polarizability, the frequency dependence, and the time constant in exploration of metal minerals and geothermal resources.