Surveys in Geophysics

, Volume 12, Issue 6, pp 565-581

First online:

The use of geophysical images in subsurface investigations of the Solway Basin, England

  • S. A. DruryAffiliated withDepartment of Earth Sciences, Open University
  • , A. S. D. WalkerAffiliated withBritish Geological Survey

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This paper focuses on the use of low-cost geophysical data sets in raster format for structural analysis of a small onshore basin in NW England. Gravity and aeromagnetic data are expressed as images enhanced by a variety of image-processing methods, aimed at expressing the data in a form most readily appreciated by human vision. This involves side-illumination of the data using directional first derivative filters, and pseudo-colouring based on look-up table techniques. The principal data handling method was trend-surface analysis and calculation ofnth-order residual images. Most of the known structural attributes of the basin are resolved, together with previously unknown features affecting the basin's deep architecture.