Skip to Main Content
Book Chapter

CHAPTER 9: CONTROLLED SOURCE AUDIO-FREQUENCY MAGNETOTELLURICS

By
Kenneth L. Zonge
Kenneth L. Zonge
*
Zonge Engineering & Research Organization, Inc., 3322 East Fort Lowell Road, Tucson, Arizona 85716.
Search for other works by this author on:
Larry J. Hughes
Larry J. Hughes
Terra Graphics, 1016 Crest View Court, Kingston Spring, TN 37082: Formerly Zonge Engineering.
Search for other works by this author on:
Published:
January 01, 1991

INTRODUCTION

Controlled source audio-frequency magnetotellurics (CSAMT) is a frequency-domain electromagnetic sounding technique which uses a fixed grounded dipole or horizontal loop as an artificial signal source. CSAMT is similar to the natural-source magnetotellurics (MT) and audio-frequency magnetotellurics (AMT) techniques; the chief differences center around the use of the artificial CSAMT signal source at a finite distance. The source provides a stable, dependable signal, resulting in higher-precision and more economical measurements than are usually obtainable with natural-source measurements in the same spectral bands. However, the controlled source can also complicate interpretation by adding source effects, and by placing certain logistical restrictions on the survey. In most practical field situations these drawbacks are not serious, and the method has proven particularly effective in mapping the top 2 to 3 km of the earth’s crust.

You do not currently have access to this article.

Figures & Tables

Contents

Investigations in Geophysics

Electromagnetic Methods in Applied Geophysics: Volume 2, Application, Parts A and B

Society of Exploration Geophysicists
Volume
3
ISBN electronic:
9781560802686
Publication date:
January 01, 1991

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal