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Part D: Induced Polarization, a Review

By
T. R. Madden
T. R. Madden
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T. Cantwell
T. Cantwell
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Published:
January 01, 1967

Abstract

Investigations into the causes of induced polarization have shown that the largest effects are due to the presence of electronic conducting minerals in the pore system of the rocks. Theoretical studies into the charge transfer reactions involved when current is sent through such mineralized rocks have led to some simple rules concerning the time or frequency structure of the induced polarization effects. There are a few indications that at very low frequencies or at long time scales, deviations from these rules occur that may provide further parameters for evaluating induced-polarization effects.

The greatest difficulties in making field measurements arise from electromagnetic coupling and telluric noise problems. The electromagnetic coupling produces effects that are superimposed on the induced polarization effectsthis sets an upper limit on the frequencies that can be used for the measurement. In most applications one should use frequencies that are less than 10 cps. The telluric noise is more of a problem at the low end of the spectrumit sets a limit ori the periods that can be used. In typical situations, one must work with periods of less than 60 sec. Filtering techniques are very useful in cutting down the telluric noise effect.

The problems of interpretation are examined briefly and some simple cases are discussed.

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Contents

Mining Geophysics Volume II, Theory

Don A. Hansen
Don A. Hansen
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Walter E. Heinrichs, Jr.
Walter E. Heinrichs, Jr.
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Ralph C. Holmer
Ralph C. Holmer
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Robert E. MacDougall
Robert E. MacDougall
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George R. Rogers
George R. Rogers
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John S. Sumner
John S. Sumner
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Stanley H. Ward
Stanley H. Ward
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Society of Exploration Geophysicists
ISBN electronic:
9781560802716
Publication date:
January 01, 1967

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