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EXPLORATION OF HIGH RESISTIVITY BASEMENT USING ELECTRICAL AND MAGNETIC FIELDS OF QUASI‐STATIC POINT SOURCES*
- Source: Geophysical Prospecting, Volume 31, Issue 5, Sep 1983, p. 829 - 839
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- 27 Apr 2006
Abstract
Abstract
Determination of thickness of sediments (usually of high conductivity) overlying a high‐resistivity basement is one of the basic problems of electrical exploration methods. This paper proposes to determine horizontal electrical conductance on the basis of impedance calculated from electrical and magnetic fields of distant quasi‐static (low‐frequency) point sources. Using the proposed method, horizontal conductance of the sediments can be determined also from artificial quasi‐static noise‐impulses coming from sources of unknown position and intensity. The results of analogue modeling and field examples prove the potential of the proposed technique.