Altitude correction of time domain AEM data for image display and geological mapping using the Apparent Dipole Depth (ADD) method

Andy Green

doi:10.1071/EG998087

ISSN: 0812-3985
E-ISSN: 1834-7533

Altitude correction of time domain AEM data for image display and geological mapping using the Apparent Dipole Depth (ADD) method
Authors Andy Green^a
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^a Cooperative Research Centre for Australian Mineral Exploration Technologies, , 8 Lawley Cres., Pymble, , NSW, 2073, . Phone/Fax: (61-2) 9144 1351
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 29, Issue 1-2, Mar 1998, p. 87 - 91
DOI: https://doi.org/10.1071/EG998087
- Published online: 01 Mar 1998

Abstract

This paper describes a procedure called the Apparent Dipole Depth (ADD) method for simple correction of airborne TEM data for the effects of changing aircraft altitude. The method uses the receding image concept of Maxwell and assumes that the earth is horizontally layered. It is necessary that the data can be converted to step response (B field at the sensor for a step-off in current). In spite of the limitations inherent in these assumptions, careful application of the method results in a great improvement in the interpretability of images of the early time channels.

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1998-03-01

2026-01-19

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References

Macnae, J., and Lamontagne, Y., 1987, Imaging quasi-layered conductive structures by simple processing of transient electromagnetic data: Geophysics 52, 545–554.
Maxwell, J.C., 1892, A treatise on electricity and magnetism: Clarendon Press.
Stolz, N. and Macnae, J., 1997, Fast approximate inversion of TEM data: Explor. Geophys. 28, 317–322.
Wolfgram, P., 1993, Advanced tools for processing and interpreting GEOTEM data: Presented at the International Workshop on Airborne Electromagnetic Methods sponsored by the Laboratory for Advanced Subsurface Imaging, University of Arizona.
Wolfgram, P. and Karlik, G., 1995, Conductivity-depth transform of GEOTEM data: Explor. Geophys. 26, 179–185.

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Article Type: Research Article

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Altitude correction of time domain AEM data for image display and geological mapping using the Apparent Dipole Depth (ADD) method

Abstract

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