Effects of resistive bodies on DC electrical soundings

M. Giudici, L. Alfano

Abstract


Some deep DC electrical soundings, performed in alpine and apenninic areas with the continuous polar dipole-dipole spread, show apparent resistivity curves with positive slopes. Measured values of apparent resistivity reach 30000 Wm. Applying the "surface charges" method we developed three dimensional mathematical models, by means of which we can state simple rules for determining the minimum extensions of the deep resistive bodies, fundamental information for a more precise interpretation of the field results.

Keywords


DC electrical sounding;dipole-dipole spread;3 D mathematical modelling

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References


DOI: https://doi.org/10.4401/ag-3952
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X