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Quantitative interpretation of self‐potential anomalies in hydrogeological exploration of volcanic areas: a new approach
- Source: Near Surface Geophysics, Volume 1, Issue 2, Nov 2003, p. 69 - 75
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- 01 Feb 2002
- 01 Oct 2002
- 01 Oct 2002
Abstract
ABSTRACT
Hydrogeological exploration of volcanic areas has shown that there is a correlation between the range of a negative self‐potential (SP) anomaly and the thickness of the unsaturated zone measured in boreholes. Based on this correlation, it is assumed that the SP anomaly is created in an unsaturated medium through which meteoric water moves downwards, and thus an SP anomaly in a polarized medium has been derived analytically. This SP formula can be used in an inverse technique in the wavenumber domain, in which inversion of the SP anomaly is used to calculate the location and depth of ground water. Theoretical models and field examples demonstrate that this method can be used to explore ground water in volcanic areas.
© European Association of Geoscientists and Engineers © 2003 European Association of Geoscientists and Engineers