Abstract
In the chapter on resistivity methods one of the implicit assumptions made was that upon switching on the current between two current electrodes the voltage measured between the two potential electrodes was produced instantaneously. In general, this is not correct since the rise time of the voltage is finite. The delay in the voltage reaching its maximum value arises from a number of causes which may be broadly classified as instrumental effects and geological effects. The instrumental contribution to the delay time can be quite small and in those areas where the simple resistivity method is applicable the contribution to the delay time from subsurface geological causes is also too small to be of much use. However, there are some types of geological situations where the rise time is significant; this effect varies from place to place so the length of the rise time and the shape of the curve may therefore constitute a useful diagnostic method for exploration.
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Suggestions for Further Reading
Edwards, L.S., 1977. A modified pseudosection for resistivity and IP, Geophysics, 42, 1020–1036.
Hallof, P.G., 1974. The IP phase measurement and inductive coupling, Geophysics, 39, 650–665.
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Seigel, H.O., 1974. The magnetic induced polarization method, Geophysics, 39, 321–339.
Sumner, J.S., 1976. Principles of induced polarization for geophysical interpretation, Elsevier, New York.
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Zonge, K.L. and Wynne, J.C., 1975. Recent advances in complex resistivity measurements, Geophysics, 40, 851–864.
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© 1981 A. E. Beck
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Beck, A.E. (1981). Induced polarization. In: Physical Principles of Exploration Methods. Palgrave, London. https://doi.org/10.1007/978-1-349-16605-3_4
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DOI: https://doi.org/10.1007/978-1-349-16605-3_4
Publisher Name: Palgrave, London
Print ISBN: 978-0-333-26394-5
Online ISBN: 978-1-349-16605-3
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