Rapid methods for interpretation of induced polarization anomalies

B. Khesin*, V. Alexeyev, L. Eppelbaum

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The induced polarization (IP) method is used at various stages of prospecting in poorly accessible regions that have complex structure. For such conditions we suggest approximate procedures for acquiring information about the location of the structures in question. Correlation between the observed fields and the heights of observation points is used for reducing the effect of terrain relief. Simultaneously, the problem of revealing an anomalous body is qualitatively solved. The qualitative construction of pseudosections of apparent polarizability ηa and semi-quantitative determination of the depth of a polarized bed using vertical sounding allow us to obtain information about the ore potential of a region as a whole and the location of ore deposits specifically. We demonstrate common aspects of typical models (thin and thick beds, horizontal circular cylinder) with models used in magnetic prospecting. On this basis it is suggested that one should apply quantitative methods of magnetic anomaly interpretation in the cases of rugged topography, oblique magnetization (polarization) and unknown levels of the normal field for rapid inversion of ηa anomalies. These rapid methods (improved modifications of characteristic point and tangent methods) are successfully tested both on models and in actual prospecting and investigation of a karst terrain.

Original languageEnglish
Pages (from-to)117-130
Number of pages14
JournalJournal of Applied Geophysics
Volume37
Issue number2
DOIs
StatePublished - Jun 1997

Keywords

  • Induced polarization
  • Interpretation methods
  • Ore deposits
  • Topographic correction

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