1887
Volume 40, Issue 3
  • ISSN: 0812-3985
  • E-ISSN: 1834-7533

Abstract

The quantitative interpretation of magnetic anomalies aims at finding out the location, depth, dip, size, and susceptibility contrast of causative geological sources. In this paper an easy method of interpreting magnetic anomalies over simple geometric shapes of dyke, sheet and vertical step has been proposed by using the easily recognisable characteristic positions on the magnetic anomaly profiles. The method does not require prior knowledge of origin and datum. For determining the source parameters, mathematical expressions and graphical procedure are given.

Loading

Article metrics loading...

/content/journals/10.1071/EG09005
2009-09-01
2026-01-14
Loading full text...

Full text loading...

References

  1. Åm K. 1972 The arbitrarily magnetized dike; Interpretation by characteristics: Geoexploration 10 63 90 doi:10.1016/0016-7142(72)90014-2
    [Google Scholar]
  2. Atchuta Rao D. Ram Babu H. V. 1980 Properties of the relation figure between the vertical and the horizontal cylindrical ore body: Current Science 49 584 585
    [Google Scholar]
  3. Barongo J. D. 1985 Method for depth estimation on magnetic vertical gradient anomalies: Geophysics 50 963 968 doi:10.1190/1.1441974
    [Google Scholar]
  4. Bhattacharyya B. K. Leu L. K. 1975 Spectral analysis of gravity and magnetic anomalies due to two-dimensional structures: Geophysics 40 993 1013 doi:10.1190/1.1440593
    [Google Scholar]
  5. Bott M. H. P. 1967 Solution of the linear inverse problem in magnetic interpretation with application to oceanic magnetic anomalies: Geophysical Journal of Royal Astronomical Society 13 313 323
    [Google Scholar]
  6. Bott M. H. P. 1973, Inverse method in interpretation of magnetic and gravity anomalies In: Methods in computational physics B A Bott (Ed.), Vol 13, pp. 133–162. Academic Press.
  7. Breiner S 1973, Application manual for portable magnetometers Geometrics.
  8. Cook K. L. 1959 Quantitative interpretation of vertical magnetic anomalies over veins: Geophysics 15 667 686 doi:10.1190/1.1437631
    [Google Scholar]
  9. Gay P. S. Jr 1963 Standard curves for interpretation of magnetic anomalies over long tabular bodies: Geophysics 28 161 200
    [Google Scholar]
  10. Gay S. P. 1965 Standard curves for the interpretation of magnetic anomalies over long horizontal cylinders: Geophysics 30 818 828 doi:10.1190/1.1439656
    [Google Scholar]
  11. Grant F S and West G F 1965, Interpretation theory in applied geophysics: McGraw Hill Book.
  12. Green R. 1979 The harmonic method of inverting a magnetic profile over a contact: Geoexploration 17 261 268 doi:10.1016/0016-7142(79)90021-8
    [Google Scholar]
  13. Green R. 1980 Field processing of magnetic data: Geophysical Prospecting 28 384 391 doi:10.1111/j.1365-2478.1980.tb01233.x
    [Google Scholar]
  14. Green R Stanley J. M. 1975 Application of a Hilbert transform method to the interpretation of surface-vehicle magnetic data: Geophysics 23 18 27
    [Google Scholar]
  15. Hall D. H. 1968 A magnetic interpretation method for calculating body parameters for buried sloping steps and thick sheets: Geoexploration 6 187 206 doi:10.1016/0016-7142(68)90013-6
    [Google Scholar]
  16. Hartman R. H. Tesky D. J. Friedberg J. L. 1971 A system of rapid digital aeromagnetic interpretation: Geophysics 36 891 918 doi:10.1190/1.1440223
    [Google Scholar]
  17. Heiland C. A. 1940, Geophysical Exploration: Prentice-Hall, Inc.
  18. Hood P. 1965 Gradient measurements in aeromagnetic surveying: Geophysics 30 891 902 doi:10.1190/1.1439666
    [Google Scholar]
  19. Hood P. McClure D. J. 1965 Gradient measurements in ground magnetic prospecting: Geophysics 30 403 410 doi:10.1190/1.1439592
    [Google Scholar]
  20. Jakosky J J 1940, Exploration Geophysics: Times-Mirror Press.
  21. Koulomzine Th. Lamontagne Y. Nadeau A. 1970 New methods for the direct interpretation of magnetic anomalies caused by inclined dikes of infinite length: Geophysics 35 812 830 doi:10.1190/1.1440131
    [Google Scholar]
  22. Ku C. C. Sharp J. A. 1983 Werner deconvolution for automated magnetic interpretation and its refinement using Marquardt’s inverse modeling: Geophysics 45 1634 1639
    [Google Scholar]
  23. McGrath P. H. Hood P. J. 1970 The dipping dike case; A computer curve-matching method of magnetic interpretation: Geophysics 35 831 838 doi:10.1190/1.1440132
    [Google Scholar]
  24. McGrath P. H. Hood P. J. 1973 An automatic least squares multi-model method of magnetic interpretation: Geophysics 38 349 358 doi:10.1190/1.1440345
    [Google Scholar]
  25. Nabighian M. N. 1972 The analytical signal of two-dimensional magnetic bodies with polygonal cross-section; Its properties and use for automated anomaly interpretation: Geophysics 37 507 517 doi:10.1190/1.1440276
    [Google Scholar]
  26. Nabighian M. N. 1985 Toward a three-dimensional automatic interpretation of potential field data via generalized Hilbert transforms: Geophysics 37 780 786
    [Google Scholar]
  27. Nettleton L L 1940, Geophysical prospecting for oil: McGraw Hill Books.
  28. Nettleton L L 1976, Gravity and magnetics in oil prospecting: McGraw Hill Books.
  29. Rao P. T. K. S. 1987 Dike model in magnetic known properties and new ideas for quantitative interpretation Published in A E G Souvenir of 13th Annual Convention 12–14 November 1987.
  30. Rao P. T. K. S. 1988 Interpretation of magnetic gradient anomalies using characteristic positions of equi-angular separation. Geological contact and vein: Geoexploration 25 199 209 doi:10.1016/0016-7142(88)90015-4
    [Google Scholar]
  31. Paterson N. R. Reeves C. V. 1985 Application of gravity and magnetic surveys. The state-of-the-art in 1985: Geophysics 50 2558 2594 doi:10.1190/1.1441884
    [Google Scholar]
  32. Powell D. W. 1967 Fitting observed profiles to a magnetized dike or fault-step model: Geophysical Prospecting 15 208 220 doi:10.1111/j.1365-2478.1967.tb01784.x
    [Google Scholar]
  33. Qureshi I. R. Nalaye A. M. 1978 A method for the direct interpretation of magnetic anomalies caused by two-dimensional vertical faults: Geophysics 43 179 188 doi:10.1190/1.1440819
    [Google Scholar]
  34. Rao B. S. R. Prakasa Rao T. K. S. Krishna Murthy A. S. 1977 A note on magnetized spheres: Geophysical Prospecting 25 746 757 doi:10.1111/j.1365-2478.1977.tb01201.x
    [Google Scholar]
  35. Rao B. S. R. Radhakrishna Murthy I. V. Visweswara Rao C. 1973 Two methods for computer interpretation vertical magnetic anomalies of spheres and horizontal cylinders: Pure and Applied Geophysics 102 67 72 doi:10.1007/BF00876592
    [Google Scholar]
  36. Reeves C. V. 1981, Optimizing the interpretation of magnetic and gravity data by computer inversion of numerous collected anomalies – paper presented at the 51st Annual International Meeting and Expo Society Exploration of Geophysics, Los Angles.
  37. Reford M. S. 1964 Magnetic anomalies over thin sheets: Geophysics 29 532 536 doi:10.1190/1.1439388
    [Google Scholar]
  38. Shuey R. T. 1972 Application of Hilbert transforms to magnetic profiles: Geophysics 37 1043 1045 doi:10.1190/1.1440313
    [Google Scholar]
  39. Stanley J. M. 1977 Simplified magnetic interpretation of the geological contact and thin dike: Geophysics 42 1236 1240 doi:10.1190/1.1440788
    [Google Scholar]
  40. Telford W M Geldart L P Sheriff R A and Keys D A 1976, Applied Geophysics: Cambridge University Press.
/content/journals/10.1071/EG09005
Loading
/content/journals/10.1071/EG09005
Loading

Data & Media loading...

  • Article Type: Research Article
Keyword(s): characteristic positions; depth; dyke; origin; sheet; step

Most Cited This Month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error