A 3D conductivity model of the Isle of Wight, UK, from airborne EM data

White, J.C.; Beamish, D.. 2009 A 3D conductivity model of the Isle of Wight, UK, from airborne EM data. In: Near Surface 2009, Dublin, Ireland, 7-9 Sept 2009. EAGE.

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This study reports the first airborne electromagnetic (AEM) survey in southern England. An airborne geophysical survey incorporating magnetic, radiometric and electromagnetic observations was carried out in 2007 over a 36 x 22 km area incorporating the Isle of Wight. The island is of significant geological interest due to the nature of the reactivated Variscan thrust faulting causing near vertical bedding along a central monocline. Of primary interest to this study was a first chance to deploy AEM over a significant chalk deposit and to assess the accuracy and resolution of the final 3D models in regions of significantly dipping, but well mapped, sedimentary beds. The results of multi-layer inversion are displayed across a 3D conductivity volume. The conductive Gault clay/mudstone is highly resolved against the more resistive Upper Greensand and Chalk and provides a detailed mapping of the concealed geological structure.

Item Type: Publication - Conference Item (Paper)
Programmes: BGS Programmes 2009 > Environmental Geoscience Baselines
NORA Subject Terms: Earth Sciences
Date made live: 08 May 2014 16:08 +0 (UTC)

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