Why time domain?

K. G. McCracken; G. M. Hohmann; M. L. Oristaglio

doi:10.1071/EG9804176

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

Why time domain?
Authors K. G. McCracken, G. M. Hohmann and M. L. Oristaglio
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 11, Issue 4, Dec 1980, p. 176 - 179
DOI: https://doi.org/10.1071/EG9804176
- Published online: 01 Dec 1980

Abstract

It is shown that the Slingram-type TEM systems that have been successful in Australian exploration in the last decade have all had magnetic moments, and sensitivities, which were one to two orders greater than those commonly used in North America. It is shown that frequency domain systems of the same sensitivity would require relative receiver-transmitter alignment accuracies of better than one minute of arc which is impracticable in production geophysics. Time domain EM systems do not require such accuracy, and will become increasingly dominant in exploration throughout the world with the increasing need to explore at depth.

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1980-12-01

2026-01-18

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References

BUSELLI, G., 1980. The application of SIROTEM in weathered terrain. Bull. Aust. Soc. Explor. Geophys.,11 (3), pp. 99-109.
BUSELLI, G., and O‘Neill, B., 1977. SIROTEM. A new portable instrument for multichannel transient electromagnetic measurements. Bull. Aust. Soc. Explor. Geophys.,8 (3), pp. 82-87.
HOHMANN, G. W., VAN VOORHIS, G. D., and NELSON, P. H., 1978. A vector EM system and its field applications. Geophysics,43, pp. 1418-1440.
KAUFMAN, A. A., 1978. Resolving capabilities of the inductive methods of electroprospecting. Geophysics, 43, pp. 1392-1398.
ORISTAGLIO, M. L., McCRACKEN, K. G., and HOHMANN, G. W., 1980. A comparison of Time- and Frequency-Domain EM. Submitted to Geophysics.
WARD, S. H., RYU, J., GLENN, W. E., HOHMANN, G. W., DEY, A., and SMITH, B. D., 1974. Electromagnetic methods in conductive terrains. Geoexploration,12, pp. 121-183.

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Article Type: Research Article

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Why time domain?

Abstract

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