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Effective-Medium Inversion of Induced Polarization Data for Mineral Exploration and Mineral Discrimination: Case Study for the Copper Deposit in Mongolia

TechnoImaging, Salt Lake City, UT 84107, USA
Department of Geology and Geophysics, The University of Utah, Salt Lake City, UT 84112, USA
Author to whom correspondence should be addressed.
Minerals 2018, 8(2), 68;
Received: 30 November 2017 / Revised: 29 January 2018 / Accepted: 7 February 2018 / Published: 14 February 2018
(This article belongs to the Special Issue Mining and Mineral Exploration Geophysics)
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This paper develops a novel method of 3D inversion of induced polarization (IP) survey data, based on a generalized effective-medium model of the IP effect (GEMTIP). The electrical parameters of the effective-conductivity model are determined by the intrinsic petrophysical and geometrical characteristics of composite media, such as the mineralization and/or fluid content of rocks and the matrix composition, porosity, anisotropy, and polarizability of formations. The GEMTIP model of multiphase conductive media provides a quantitative tool for evaluation of the type of mineralization, and the volume content of different minerals using electromagnetic (EM) data. The developed method takes into account the nonlinear nature of both electromagnetic induction and IP phenomena and inverts the EM data in the parameters of the GEMTIP model. The goal of the inversion is to determine the electrical conductivity and the intrinsic chargeability distributions, as well as the other parameters of the relaxation model simultaneously. The recovered parameters of the relaxation model can be used for the discrimination of different rocks, and in this way may provide an ability to distinguish between uneconomic mineral deposits and zones of economic mineralization using geophysical remote sensing technology. View Full-Text
Keywords: effective-medium; induced polarization; 3D inversion effective-medium; induced polarization; 3D inversion

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Zhdanov, M.; Endo, M.; Cox, L.; Sunwall, D. Effective-Medium Inversion of Induced Polarization Data for Mineral Exploration and Mineral Discrimination: Case Study for the Copper Deposit in Mongolia. Minerals 2018, 8, 68.

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