Determining the Depth of Infinite Horizontal Cylindrical Sources from Spontaneous Polarization Data

• Published in: Pure and applied geophysics Vol. 174; no. 3; pp. 1399 - 1404
• Main Authors: Cooper, G. R. J., Stettler, E. H.
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01-03-2017; Springer Nature B.V
• Subjects: Amplitudes; Cylinders; Drilling; Earth and Environmental Science; Earth Sciences; Estimating techniques; Geophysics; Geophysics/Geodesy; Magnetism; Mathematical analysis; Mineralization; Minima; Polarization; Potential fields; South Africa, Mpumalanga Prov; South Africa; Pyrite; Chalcopyrite; Goethite; Structural Index; Galena
• ISSN: 0033-4553; 1420-9136
• DOI: 10.1007/s00024-017-1472-7

Previously published semi-automatic interpretation methods that use ratios of analytic signal amplitudes of orders that differ by one to determine the distance to potential field sources are shown also to apply to self-potential (S.P.) data when the source is a horizontal cylinder. Local minima of the distance (when it becomes closest to zero) give the source depth. The method was applied to an S.P. anomaly from the Bourkes Luck potholes district in Mpumalanga Province, South Africa, and gave results that were confirmed by drilling.