A new method of quantitative interpretation of SP anomalies produced by a polarized inclined sheet¹

Abstract

A new method is proposed for the quantitative interpretation of SP field data produced by a polarized ore body and simulated by an inclined sheet. The theoretical concept is based on the study of the amplitude Spectrum. It is shown that the SP amplitude Spectrum is not continuous at zero frequency; this leads to the dip angle determination of the inclined sheet. It is also shown that the SP amplitude spectrum is practically nullified at a characteristic amortization frequency that depends on the depth of the polarized body. The maximum amplitude Spectrum value of the SP gradient is used to estimate the depth to the bottom of the polarized body.

Quantitative analysis of self-potential anomalies: Review of case studies from various SP applications

“…Fitterman (1979) gave a method of SP anomaly calculation for field sources of an arbitrary shape based on numerical integration using Green's function. This potentially promising approach is highly computer intensive and not provides A few groups of authors have performed spatial-frequency analysis of SP anomalies produced by polarized bodies of various geometrical shapes: Rao et al (1982), Rao and Mohan (1984), Banerjee and Pal (1990), Skianis et al (1991Skianis et al ( , 1995.…”

“…A few groups of authors have performed spatial-frequency analysis of SP anomalies produced by polarized bodies of various geometrical shapes: Rao et al (1982), Rao and Mohan (1984), Banerjee and Pal (1990), Skianis et al (1991Skianis et al ( , 1995.…”

Direct interpretation of self-potential anomalies produced by a vertical dipole

“…1016/j.jappgeo.2005.05.003 anomaly measured at ground surface. In most cases, the SP anomaly is simulated by a polarized sphere or horizontally elongated structures, such as sheets or cylinders (De Witte, 1948;Yü ngü l, 1950;Paul, 1965;Ram Babu and Atchuta Rao, 1988;Skianis et al, , 1995Abdelrahman et al, 2003 and many others). An alternative approach of solving the inverse problem with not any a priori assumption about the geometry of the SP source is proposed by Patella (1997), who has developed the ground surface self-potential tomography.…”