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Insights from a Newly Merged High-resolution Gravity and Magnetic Dataset on the Faroe-Shetland Margin
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
Thick basalts are a major challenge for conventional seismic imaging on the Faroe-Shetland Margin. However, gravity and magnetic data record variations in the density and susceptibility of the entire crust. Consequently, the thick basalt piles that are shallow in the section do not hinder the ability to detect deeper features. The principal aim of this study was to investigate the crustal architecture of the Faroe-Shetland Margin, using a combination of high resolution gravity and magnetic data, seismic data and horizons and published information. By combining seismic data with gravity and magnetic data, the strengths of all three data types were exploited; seismic data were used to constrain the shallow geology so that the deeper structure of the margin could be investigated by gravity and magnetic modelling. A network of 2D gravity and magnetic models based on seismic lines provided by PGS, are used to determine the configuration of the basement beneath the Faroe-Shetland Margin. Greater insight into the depth of basins and the timing of rifting is gained, and a model of asymmetric simple shear is proposed for the area.