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Chapter 9: Resistivity, Induced Polarization, and Complex Resistivity

By
Ken Zonge
Ken Zonge
Zonge Engineering and Research Organization, 3322 East Fort Lowell Road, Tuscon, AZ 85716. E-Mail: zonge@zonge.com. Ken Zonge E-Mail: kenz@zonge.com. Scott Urquhart E-Mail: scottu@zonge.com.
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Jeff Wynn
Jeff Wynn
U.S. Geological Survey, Volcano Hazards Office, 1300 SE Cardinal Court, Bldg. 10, Suite 100, Vancouver, WA 98683. E-Mail: jwynn@usgs.gov.
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Scott Urquhart
Scott Urquhart
Zonge Engineering and Research Organization, 3322 East Fort Lowell Road, Tuscon, AZ 85716. E-Mail: zonge@zonge.com. Ken Zonge E-Mail: kenz@zonge.com. Scott Urquhart E-Mail: scottu@zonge.com.
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Published:
January 01, 2005

Introduction

With only a few minor exceptions, electrical geophysical methods can be divided into two categories: (1) galvanic source methods, directly coupling or injecting electrical current into the ground via electrodes, and (2) inductive source methods, inducing eddy currents into the ground via time-varying magnetic fields using coils not in direct contact with the ground. Ground-penetrating radar (GPR) can be considered an extreme high-frequency, dielectric-properties–sensitive example of the latter. Self-potential (SP) effects, due to electrochemical mechanisms in the ground, and telluric current methods (where only ambient voltages, induced by natural EM sources such as the oscillating magnetosphere of the earth, are measured) can arguably be included in the former, but are both passive methods and are beyond the scope of this chapter.

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Contents

Investigations in Geophysics

Near-Surface Geophysics

Dwain K. Butler
Dwain K. Butler
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Society of Exploration Geophysicists
Volume
13
ISBN electronic:
9781560801719
Publication date:
January 01, 2005

GeoRef

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