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A new high-resolution aeromagnetic dataset over central Ayrshire: insights into the concealed geology

J. P. Busby, M. C. Akhurst and A. S. D. Walker
Scottish Journal of Geology, 45, 1-12, 1 June 2009, https://doi.org/10.1144/0036-9276/01-370
J. P. Busby
1British Geological Survey, Keyworth, Nottingham, NG12 5GG
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  • For correspondence: jpbu@bgs.ac.uk
M. C. Akhurst
2British Geological Survey, West Mains Road, Edinburgh, EH9 3LA
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A. S. D. Walker
1British Geological Survey, Keyworth, Nottingham, NG12 5GG
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Synopsis

High-resolution aeromagnetic data have been acquired over central Ayrshire as part of a multi-component environmental and resource survey. The data were recorded along easterly orientated flight lines at 200 m separation and show a very marked improvement in resolution over the pre-existing aeromagnetic data for the region. The distribution of the extensive volcanic and intrusive igneous rocks in the near sub-surface is defined more accurately, many new features are recognized and features distinguished in the pre-existing aeromagnetic data are now seen to be laterally continuous. Northwesterly trending lineaments are clearly defined and most can be attributed to Palaeogene dykes, the majority of which are reversely magnetized. Depth to source solutions and modelling suggest that even though the dykes have a limited width at outcrop, their widths increase with depth. Permo-Carboniferous easterly trending dykes are not well resolved in the new aeromagnetic data. This is most likely due to a low amplitude resultant magnetic vector that, combined with the easterly-orientated flight lines, results in few large anomalies. One significant northwesterly trending lineament is interpreted as the trace of the Cleveland Dyke across the Midland Valley. These new data should be of value to the extractive and water industries and assist in the planning and sustainable management of these resources.

  • © 2009 Scottish Journal of Geology
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Scottish Journal of Geology: 45 (1)
Scottish Journal of Geology
Volume 45, Issue 1
June 2009
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A new high-resolution aeromagnetic dataset over central Ayrshire: insights into the concealed geology

J. P. Busby, M. C. Akhurst and A. S. D. Walker
Scottish Journal of Geology, 45, 1-12, 1 June 2009, https://doi.org/10.1144/0036-9276/01-370
J. P. Busby
1British Geological Survey, Keyworth, Nottingham, NG12 5GG
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • For correspondence: jpbu@bgs.ac.uk
M. C. Akhurst
2British Geological Survey, West Mains Road, Edinburgh, EH9 3LA
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
A. S. D. Walker
1British Geological Survey, Keyworth, Nottingham, NG12 5GG
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A new high-resolution aeromagnetic dataset over central Ayrshire: insights into the concealed geology

J. P. Busby, M. C. Akhurst and A. S. D. Walker
Scottish Journal of Geology, 45, 1-12, 1 June 2009, https://doi.org/10.1144/0036-9276/01-370
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  • Article
    • Synopsis
    • Introduction
    • The magnetic data
    • The geology of the survey area
    • Main magnetic features
    • Lineament analysis
    • Trace of the Cleveland Dyke
    • Volcanic vents and plugs
    • Conclusions
    • Acknowledgements
    • References
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