Description

Developments in Economic Geology, 5: Principles of Induced Polarization for Geophysical Exploration focuses on the principles, methodologies, and approaches involved in induced polarization (IP), including anisotropism, electromagnetic coupling, and electrical circuits. The book first takes a look at resistivity principles, theory of IP, and laboratory work in IP. Concerns cover electrical measurements of rocks, anisotropism, early part of decay curve and the comparison with frequency effects, electrical models of induced polarization, electrical polarization, resistivities of earth materials, and resistivity exploration methods. The manuscript then elaborates on IP field equipment, telluric noise and electromagnetic coupling, IP field surveying, and drill-hole and underground surveying and the negative IP effect. Discussions focus on differences between surface and subsurface methods, current-sending system in the field, telluric (earth) currents, electromagnetic coupling, design considerations, coupling of electrical circuits, design considerations, and signal-generating system. The manuscript ponders on the complex-resistivity method and interpretation of induced-polarization data, including grade estimation of mineralization using the IP method, complex-resistivity survey, signal detection capabilities of the complex-resistivity method, and disadvantages of the complex-resistivity method. The text is a valuable source of information for researchers wanting to study induced polarization.

Table of Contents


Preface

Acknowledgments

1. Introduction

A Historical Summary of IP Research

The IP Effect

IP Response

The Decay Curve

IP Measurement

The Basic IP Measurement △ V/V

Phase-Angle IP Measurement

Errors

Units Used in IP Surveying

The Glossary

2. Resistivity Principles

Resistivity Theory

Ohm's Law

Three-Dimensional Resistivity

Resistivity and Conductivity

Potential Field of a Current Electrode Pair

Refraction of Current Flow Lines

Equipotential Surfaces

Resistivity Anisotropy

Paradox of Anisotropy

Superposition and Reciprocity

Resistivity Type Curves by the Method of Images

Resistivity of Earth Materials

Resistivity Properties of Minerals

Electrical Conduction in Rocks

Resistivity of Mineralized Rocks

Resistivity Exploration Methods

Resistivity Equipment

Self-Potential

Resistivity Sounding

Resistivity Profiling

Pseudosection Plotting

3. Theory of Induced Polarization

Electrochemical Theory

The Electrode

Overvoltage

The Double Layer

Faradaic and Nonfaradaic Paths

Warburg Impedance

Membrane Polarization

Applications of Electrochemical Theory

Dielectric Constant

Electrical Models of Induced Polarization

Equivalent Circuit

The Decay Curve

Field of a Dipole

Details

Language:
English
Copyright:
© 1976
Published:
Imprint:
Elsevier Science
Electronic ISBN:
9780444599872
Print ISBN:
9780444414816

About the author

Reviews

@qu:This book... steers an amazingly clear path through one of the more controversial subjects in exploration geophysics... of considerable completeness and scope... should be mandatory reading for all mining geologists, geophysicists and exploration managers. There are very few specialists indeed who could not learn at least a few things from this book. @source: Geophysics