Southern North Sea Basin Essay

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Introduction The Southern North Sea basin is located between the UK and The Netherlands, being the main gas fields in the UK, with production coming from Permian reservoirs, which are sealed by the upper Permian salt. The development of this basin is resulted of the subsidence, which has been punctuated by discrete events of uplift and predominant erosion in several periods such as Late Carboniferous, Late Cretaceous, as well as at several times during the mid-Cenozoic (Cameron et al. 1992, cited in Balson et al. 2001, p.10). Some of the episodes are not completely clear when they occur, for instant, extensional events with different stress orientations in the Upper Jurassic. Thus, the aim of this report is to analyse the structural and…show more content…
1992). In the Late Triassic and Early Jurassic subsidence in the Sole Pit Basin was connected to reactivation of Variscan basement faults and these movements stemmed from the earliest mid-Triassic halokinesis of the Upper Permian salts (Balson et al. 2002). However, In the early- mid Jurassic times, differential subsidence of the Sole Pit Basin was more prominent by the development of growth faults along the western margin of the North Sea, being that this faults account for the major thickness and facies changes of the Lower and Middle Jurassic sediments between the Sole Pit Basin and the East Midlands Shelf (Balson et al. 2002). Moreover, during the Jurassic times the Sole Pit Trough and the Cleveland Basin were the principal depocenters, accumulating high thickness of marine mudstones with subsidiary sandstones and limestones before undergoing erosion at the end of this period, which followed by post Jurassic inversion (Cameron et al. 1992). Nevertheless, cretaceous sediments are dominantly argillaceous and are more 800 thick adjacent to contemporary growth fault in the Dowsing Fault Zone. On the other hand, in the Upper Cretaceous pelagic carbonates of the chalk sea are located more than 1000 thick, and following their deposition there was widespread uplift and regression prior to the deposition of up to 800 m of mainly argillaceous marine sediments during the
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