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| | Abstract | | Induced Polarization (IP) method applies electrical current with various frequencies to underground and generates a polarization phenomenon. This is used for exploration of metallic sulfide deposits. There are two measuring methods, time domain and in the frequency domain, for IP method. In the time domain method, the transient response of the voltage after current cutoff is evaluated to identify electric characteristics of minerals. The Cole-Cole impedance is used to evaluate the polarizability of minerals by time domain IP method. In this paper, rectifying characteristics of metal sulfide minerals are considered to distinguish them from graphite which has similar chargeability. A new Cole-Cole impedance model considering rectifying characteristics of pyrite is proposed. And then its effectiveness is evaluated by some fundamental experiments with time domain IP measurements and electric circuit simulations of it. |
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