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Chapter 6: Magnetic Methods in Near-Surface Geophysics

By
R.O. Hansen
R.O. Hansen
1
Pearson, deRidder and Johnson, Inc., 12640 W. Cedar Drive Suite 100, Lakewood, CO 80228. E-mail: rohansen@prj.com.
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Louis Racic
Louis Racic
2
Geosoft, Inc., 85 Richmond St. W., 8th Floor, Toronto, ON M5H2C9, Canada. E-mail: louis.racic@geosoft.com.
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V.J.S. Grauch
V.J.S. Grauch
3
U.S. Geological Survey, Denver Federal Center, MS 964, P.O. Box 25046, Denver, CO 80225. E-mail: tien@usgs.gov.
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Published:
January 01, 2005

The Role of Magnetic Methods in Near-Surface Investigations

Magnetic methods have a prominent place in near-surface geophysics for a number of reasons. First, the sources of interest often have strong magnetic signatures; sometimes the only measurable geophysical property of the target is its magnetic field. Some examples will be given later in the chapter. Second, magnetic measurements are comparatively simple, rapid, and completely noninvasive. Although the resolution required for near-surface applications generally makes airborne data acquisition impractical, even this is possible in some cases. Finally, in near-surface investigations magnetic data are often easy to interpret; in some cases, visual inspection of essentially raw data is sufficient. For all these reasons, magnetic methods are widely used in almost all areas of near-surface geophysics. In some subfields, such as buried ordnance detection, magnetic methods are particularly important.

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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

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