THE STUDY OF INDUCED POLARIZATION METHOD BASIS THEORY A NEW METHOD OF DEFINING SECONDARY POLARIZATION CURRENT

By determining magnetic field, a new method that can define secondary polarization current in surface and volume polarized medium is advanced in this paper. In essence, it is different from the method that only determines electric field or current. When an excitation current of time domain, single signal or long pules, passes through the surface and volume polarized medium, an induced polarization (IP) effect is produced at surface and inside of the polarized body. If in polarized medium the secondary polarized current has been produced by virtue of IP effect in electrified time and in discharge process after breaking current, then the polarized medium will produce a secondary magnetid field around it. By observing magnetid field, some important contents in surface and volume polarized medium, such as the secondary polarized current exists or not, how large value is; and what is the vector's direction, have been reliably determined. Besides some experiment results, field results are given in this paper. For many years, the scholares at home and abroad have different views to the secondary polarized current exists or not in volume polarized medium. Therefore, this paper gives some experimental results that have convincing arguments, contributing to the standardization of the recognition in this aspect.