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NONLINEAR COMPLEX RESISTIVITY OF SOME NICKEL SULPHIDES FROM WESTERN AUSTRALIA*
- Source: Geophysical Prospecting, Volume 34, Issue 8, Dec 1986, p. 1255 - 1276
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- 27 Apr 2006
Abstract
The electrochemical transfer characteristics of nickel sulphides from six West Australian localities are examined by the nonlinear complex resistivity (nlcr) method. Ores are classified on the basis of their state of oxidation (supergene, transition zone and primary ores) in an equivalent mine water electrolyte; evidence is found for a systematic change of electrical response with oxidation that is symptomatic of electrochemical reactions varying from diffusion to charge‐transfer controlled processes. The analysis is based on the assumption that the Randies’ circuit is an effective model of a rock's electrical response in its natural electrolyte. Both complex impedance plane graphs and computer inversion are used to study the model. Harmonic distortion is a useful aid in this interpretation.