APPLICATION OF THE DEBYE DECOMPOSITION TO ANALYSIS OF INDUCED-POLARIZATION PROFILING DATA (Julietta gold-silver deposit, Magadan Region)
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Keywords: Induced polarization, hydrothermally altered rocks, relaxation time distribution, total chargeability
Subsection: GEOPHYSICS
Abstract
We demonstrate application of the time-domain characteristics of induced polarization (IP) to the solution of prospecting problems on the flanks of the Julietta gold-silver deposit. The IP time-domain characteristics were analyzed by the Debye decomposition, which permits reconstruction of distribution of relaxation times. The experimentally determined dependences of the IP parameters on the main petrophysical properties of disseminated ores were used to interpret field data. Application of the Debye decomposition helped to distinguish zones with finely disseminated sulfide minerals in hydrothermally altered rocks, which were missed on the application of the standard technique for analysis of IP data. The estimated content of sulfide minerals in the altered rocks agrees with geological data.
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