Statistical evaluations of an automatic magnetic interpretation method for semi-infinite dykes

Barry. E. Long; Robert. J. Whiteley

doi:10.1071/EG974015

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

Statistical evaluations of an automatic magnetic interpretation method for semi-infinite dykes
Authors Barry. E. Long and Robert. J. Whiteley
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 5, Issue 1, Mar 1974, p. 15 - 18
DOI: https://doi.org/10.1071/EG974015
- Published online: 01 Mar 1974

Abstract

The performance of an automatic magnetic interpretation technique with regard to the accuracy of depth and width estimation has been studied using statistical techniques and theoretically generated anomalies over semi-infinite magnetized dykes. The automatic interpretation was based on the method of Koulomzine et al. Geophysics Vol. 35.

This study revealed that the method produces generally reliable depth estimates over a wide range of geologically realistic models but the absolute accuracy of both depth and width estimates vary considerably and appear to be dependent on the actual depth-to-width ratio of the dyke.

The automatic interpretation procedure was also found to provide more accurate estimates of depth and width when the original anomaly was asymmetrical as opposed to symmetrical.

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References

Biuckshaw, J. M. and Kunaratnam, K., 1963. The Interpretation of Magnetic Anomalies due to Dykes. Geophysical Prospecting. Vol 11, p. 509-522.
Gay, Parker S. Jr., 1963. Standard Curves for Interpretation of Magnetic Anomalies over long Tabular Bodies. Geophysics. Vol. 28, p. 161-200.
Hartman, Ronald R., Teskey, Dennis J. and Friedberg, Jeffrey L, 1971. A System for Rapid Digital Aeromag-netic Interpretation. Geophysics. Vol. 36, p. 891-918.
Koulomzine, Th., Lamontagne, Y. and Nadeau, A., 1970. New Methods for the Direct Interpretation of Magnetic Anomalies Caused by Inclined Dykes of Infinite Length. Geophysics. Vol. 35, p. 812-830.
McGrath, P. H. and Hood, Peter J., 1970. The Dipping Dyke Case: A Computer Curve-Matching Method of Magnetic Interpretation. Geophysics. Vol. 35, p. 831-848.
Naudy, Henri, 1971. Automatic Determination of Depth on Aeromagnetic Profiles. Geophysics. Vol. 36, p. 717-722.
Talwani, M. and Heirtzler, J. R., 1964. Computation of magnetic anomalies caused by two dimensional structures of arbitrary shape. Computers in the Mineral Industries. Stanford University, Stanford, Calif, p. 464-480.

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Article Type: Research Article

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Statistical evaluations of an automatic magnetic interpretation method for semi-infinite dykes

Abstract

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