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Structure of the Wyville-Thomson Ridge: Reducing Uncertainty by Integrated Potential Fields and Seismic Interpretation
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 80th EAGE Conference and Exhibition 2018, Jun 2018, Volume 2018, p.1 - 5
Abstract
Gravity and magnetic potential field data are integrated with well and 2D broadband seismic data to provide new insights into the formation and structure of the Wyville-Thomson Ridge (WTR) in the NE Rockall Basin. Interpretation below a hard and fast basaltic layer has previously been hindered by the high impedance contrast with soft and slow Eocene sediments above. Six density and susceptibility models built on seismic lines suggest that the WTR formed by the Cenozoic inversion of Mesozoic basins, leaving potential for the presence of Kimmeridgian source rock below the WTR. Previously unmapped folds at the SE termination of the WTR define a horsetail-splay, and suggest that folding within the WTR occurred by Cenozoic dextral transpression.