1887
Volume 66 Number 1
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

The Generalised Derivative Operator is an image‐processing tool for the enhancement of potential field data. It produces an amplitude‐balanced image of the derivative of a potential field in any direction in three‐dimensional space. This paper shows how, by using the correct inclination angle , the Generalised Derivative Operator can be used to produce images where its maxima/minima lie directly over dipping contacts and thin dykes with arbitrary magnetisation vectors. The dip of contacts and dykes can be found by varying until a symmetrical result is obtained (in the absence of unknown remanent magnetisation). Furthermore, the width of the peak of the Generalised Derivative Operator can then be used to determine the depth of the contact or dyke.

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/content/journals/10.1111/1365-2478.12539
2017-06-09
2024-03-28
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References

  1. CooperG.R.J.2004. The textural analysis of gravity data using co‐occurrence matrices. Computers & Geosciences30(1), 107–115.
    [Google Scholar]
  2. CooperG.R.J.2009. Balancing images of potential field data. Geophysics74(3), L17–L20.
    [Google Scholar]
  3. CooperG.R.J. and CowanD.R.2011. A generalised derivative operator for potential field data. Geophysical Prospecting59, 188–194.
    [Google Scholar]
  4. CooperG.R.J.2014. The automatic determination of the location and depth of contacts and dykes from aeromagnetic data. Pure and Applied Geophysics171, 2417–2423.
    [Google Scholar]
  5. DentithM.1995. Textural filtering of aeromagnetic data. Exploration Geophysics26, 209–214.
    [Google Scholar]
  6. Geosoft2015. Magmap filtering guide. Available from www.geosoft.com/resources/goto/calculating-the-analytic-signal-in-magmap#sthash.wG6HmzzE.dpuf.
  7. HornB.K.P.1982. Hill shading and the reflectance map. Geo‐Processing2, 65–146.
    [Google Scholar]
  8. MillerH.G. and SinghV.1994. Potential field tilt—A new concept for location of potential field sources. Journal of Applied Geophysics32, 213–217.
    [Google Scholar]
  9. NabighianM.N.1972. The analytical signal of 2D magnetic bodies with polygonal cross‐section: its properties and use for automated anomaly interpretation. Geophysics37, 507–517.
    [Google Scholar]
  10. RefordM.S.1964. Magnetic anomalies over thin sheets. Geophysics29, 532–536.
    [Google Scholar]
  11. SalemA., WilliamsS., FairheadJ.D., RavatD. and SmithR.S.2007. Tilt‐depth method: a simple depth estimation method using first‐order magnetic derivatives. The Leading Edge, 26(12), 1502–1505.
    [Google Scholar]
  12. WijnsC., PerezC. and KowalczykP.2005. Theta map: edge detection in magnetic data. Geophysics70(4), 39–43.
    [Google Scholar]
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  • Article Type: Research Article
Keyword(s): Aeromagnetics; interpretation

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