1887
Volume 63, Issue 2
  • E-ISSN: 1365-2478
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Abstract

ABSTRACT

A new methodology that levels airborne magnetic data without orthogonal tie‐lines is presented in this study. The technique utilizes the low‐wavenumber content of the flight‐line data to construct a smooth representation of the regional field at a scale appropriate to the line lengths of the survey. Levelling errors are then calculated between the raw flight‐line data and the derived regional field through a least squares approach. Minimizing the magnitude of the error, with a first‐degree error function, results in significant improvements to the unlevelled data. The technique is tested and demonstrated using three recent airborne surveys.

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2014-11-27
2024-04-19
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References

  1. BeamishD. and WhiteJ.C.2011. Aeromagnetic data in the UK: a study of the information content of baseline and modern surveys across Anglesey, North Wales. Geophysical Journal International184, 171–190.
    [Google Scholar]
  2. BeamishD. and YoungM.2009. The geophysics of Northern Island: the Tellus effect. First Break27, 43–49.
    [Google Scholar]
  3. BeikiM., BastaniM. and PedersenL.B.2010. Leveling HEM and aeromagnetic data using differential polynomial fitting. Geophysics75, L13–L23.
    [Google Scholar]
  4. CussR.J.2003. The removal of cultural noise from high‐resolution aeromagnetic data acquired over highly developed areas; manual approaches to data cleansing from the HiRES‐1 survey. First Break21, 12–18.
    [Google Scholar]
  5. FediM. and FlorioG.2003. Decorrugation and removal of directional trends of magnetic fields by the wavelet transform: application to archaeological areas. Geophysical Prospecting51, 261–272.
    [Google Scholar]
  6. FerraccioliF., GambettaM. and BozzoE.1998. Microlevelling procedures applied to regional aeromagnetic data: an example from the Transantarctic Mountains. Geophysical Prospecting46, 177–196.
    [Google Scholar]
  7. FinlayC.C., MausS., BegganC.D., BondarT.N., ChambodutA., ChernovaT. A.et al. 2010. International geomagnetic reference field: the eleventh generation. Geophysical Journal International183(3), 1216–1230.
    [Google Scholar]
  8. HautaniemiH., KurimoM., MultalaJ., LeväniemiH. and VironmäkiJ.2005. The ‘three in one’ aerogeophysical concept of GTK in 2004. In: Aerogeophysics in Finland 1972‐2004: Methods, System Characteristics and Applications, Vol. 39 (ed M.‐L.Airo ), pp. 21–74. Geological Survey of Finland, Special Paper.
    [Google Scholar]
  9. HuangH.2008. Airborne geophysical data levelling based on line‐to‐line correlations. Geophysics73(3), F83–F89.
    [Google Scholar]
  10. LahtiM., BeamishD., CussR.J. and WilliamsJ.2007. Deculturing of the Northern Ireland Tellus magnetic data. British Geological Survey Technical Report, IR/07/147.
    [Google Scholar]
  11. LeeM.K., PeartR.J., JonesD.G., BeamishD. and VironmakiJ.2001. Applications and challenges for high resolution airborne surveys in populated areas. EAGE 63nd Conference, Amsterdam, The Netherlands, Extended Abstracts, Paper IA‐1.
  12. LuyendykA.P.J.1997. Processing of airborne magnetic data. Journal of Australian Geology and Geophysics17, 31–38.
    [Google Scholar]
  13. MintyB.R.S.1991. Simple micro‐levelling for aeromagnetic data. Exploration Geophysics22, 591–592.
    [Google Scholar]
  14. NelsonJ.B.1994. Leveling total field aeromagnetic data with measured horizontal gradients. Geophysics59, 1166–1170.
    [Google Scholar]
  15. ReevesC.V.1993. Limitations imposed by geomagnetic variations on high quality aeromagnetic surveys. Exploration Geophysics24, 115–116.
    [Google Scholar]
  16. RoestW.R., VerhoefJ. and PilkingtonM.1992. Magnetic interpretation using 3‐D analytical signal. Geophysics57, 116–125.
    [Google Scholar]
  17. UrquhartT.1988. Decorrugation of enhanced magnetic field maps, 59th SEG annual international meeting, Expanded Abstracts, 371–372.
  18. WhiteJ.C. and BeamishD.2010. The HiRES airborne geophysical survey of Anglesey: processing report. British Geological Survey Open Report, OR/10/002.
  19. WhiteJ.C., BeamishD. and CussR.J.2009. The HiRES airborne geophysical survey of the Isle of Wight: Processing Report. British Geological Survey Open Report, OR/ 09/060.
  20. WhiteJ.C. and BeamishD.2011. Magnetic structural information obtained from the HiRES airborne survey of the Isle of Wight. Proceedings of the Geologists' Association122, 781–786.
    [Google Scholar]
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  • Article Type: Research Article
Keyword(s): Aeromagnetic; Data processing; Levelling; Magnetics

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