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Structural Controls on Different Styles of Cenozoic Inversion in the Celtic Sea Basins, Offshore IrelandNormal access

Authors: P. Rodríguez-Salgado, C. Childs, P.M. Shannon and J.J. Walsh
Event name: 79th EAGE Conference and Exhibition 2017
Session: Fractured and Faulted Reservoirs - Outcrops and Case Studies
Publication date: 12 June 2017
DOI: 10.3997/2214-4609.201701288
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.9Mb )
Price: € 20

Compressional structures developed as a result of Cenozoic inversion are well known along the north-western Atlantic passive margin but, despite their significance in North Atlantic petroleum systems, details of their mechanisms of formation remain unclear. In this study we provide examples of the style and characteristics of these inversion structures defined from regional 2D and 3D datasets within the Celtic Sea Basins in offshore Ireland. Two end-member styles of inversion are recognized: short-wavelength, elongate anticlines that occur predominantly at the margins of the Jurassic basins and long-wavelength, relatively equidimensional anticlines that occur at the centre of the basins. Based on the location and orientation of 53 inversion structures a relationship between the inversion structure type and i) basement structural fabrics, ii) basin depocentre distribution and iii) pre-inversion extensional fault orientation is established.

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