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Journal Articles Geological Society, London, Petroleum Geology Conference series Year : 2016

Deep structure of the Porcupine Basin from wide-angle seismic data

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Abstract

15 The Porcupine Basin, part of the frontier petroleum exploration province west of Ireland, has an 16 extended history that commenced prior to the opening of the North Atlantic Ocean. Lithospheric 17 stretching factors have previously been estimated to increase from <2 in the north to >6 in the south of 18 the basin. Thus, it is an ideal location to study the processes leading to hyperextension on continental 19 margins. The Porcupine Median Ridge (PMR) is located in the south of the basin and has been 20 alternatively interpreted as a volcanic feature, a serpentinite mud diapir, or a tilted block of 21 continental crust. Each of these interpretations has different implications for the thermal history of the 22 basin. We present results from travel-time tomographic modelling of two ~300-km-long wide-angle 23 seismic profiles across the northern and southern parts of the basin. Our results show: (1) the 24 geometry of the crust, with maximum crustal stretching factors up to 6 and 10 along the northern and 25 southern profiles, respectively; (2) asymmetry of the basin structures, suggesting some simple shear 26 Article text Click here to download Article text PGC_Proceeding-revised.docx
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Dates and versions

hal-01399022 , version 1 (18-11-2016)

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Louise Watremez, Manel Prada, Tim Minshull, Brian O 'Reilly, Chen Chen, et al.. Deep structure of the Porcupine Basin from wide-angle seismic data. Geological Society, London, Petroleum Geology Conference series, 2016, pp.1-30. ⟨10.1144/PGC8.26⟩. ⟨hal-01399022⟩
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