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  • 1
    Monograph available for loan
    Monograph available for loan
    The petroleum exploration of Ireland's offshore basins (2001)
    London : The Geological Society
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    Call number: 9/M 02.0230
    In: Geological Society special publication
    Type of Medium: Monograph available for loan
    Pages: 473 S.
    ISBN: 1862390878
    Series Statement: Geological Society special publication 188
    Classification:
    A. 3.7.
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
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    The Petroleum Exploration of Ireland's Offshore Basins (2001)
    London : The Geological Society
    Details
    Description / Table of Contents: Ireland is virtually encircled by sedimentary basins which developed in response to periods of rifting and thermal subsidence. These offshore basins have been the focus of intermittent phases of exploration since drilling of the first well in 1970 and, to date, 136 wells have been drilled. Most of the drilling so far has concentrated on structural traps, but recent exploration has begun to focus on a variety of stratigraphic traps, with greater emphasis on results obtained from studies of the Atlantic margin basins. The Petroleum Exploration of Ireland's Offshore Basins contains a set of 27 papers on a wide range of topics relating to recent exploration of the Irish offshore sedimentary basins. These papers address aspects of the structural and stratigraphic evolution, thermal history, petroleum systems, reservoir geology and sea-bed processes in the Irish offshore area. Although the main focus is on petroleum systems and those issues bearing on exploration risk, the exploration effort has yielded fundamental new insight into the wider development of starved passive continental margins. The volume will be of interest to oil industry explorationists and researchers focusing on NW European sedimentary basins and the evolution of the Irish Atlantic margin.
    Pages: Online-Ressource (473 Seiten)
    ISBN: 1862390878
    URL: http://sp.lyellcollection.org/content/188/1.toc
    Language: English
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  • 3
    Electronic Resource
    Electronic Resource
    Evidence from episodic seamount volcanism for pulsing of the Iceland plume in the past 70 Myr (2000)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 408 (2000), S. 954-958 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The North Atlantic volcanic province has been attributed to continental rifting about 60 Myr ago over an Iceland plume head with a diameter of 1,000–2,000 km (refs 1, 2). But evidence from a few igneous centres has been used to infer that earlier ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35050066
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  • 4
    Electronic Resource
    Electronic Resource
    Gas hydrate crystals may help build reefs (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 391 (1998), S. 648-649 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] During a recent cruise in the Porcupine Basin, off southwest Ireland, we discovered two extensive and hitherto largely unsuspected deep-water reef provinces, including a giant cluster of hundreds of buried mounds. The ring shapes of many reefs suggest that they are caused by an axial fluid ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35530
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  • 5
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    Slope instability and sediment redistribution in the Rockall Trough: constraints from GLORIA (2001)
    In:  Geological Society Special Publication 188: 439-454.
    Details
    Publication Date: 2001-01-01
    Description: A recent GLORIA (Geological LOng Range Inclined Asdic) sidescan survey covered 200 000 km2 of the sea bed in the Irish Rockall Trough. It revealed a range of sedimentary features on the trough floor and its steep (〉6{degrees}) margins. The western margin is characterized by large-scale (of the order of hundreds of kilometres in length) downslope mass movement. Smaller-scale slides and slumps (tens of kilometres across) occur on the eastern margin, but they are subordinate to canyon, channel and fan systems. The western and central parts of the trough floor contain the Feni Sediment Ridge, a 600 km long contourite sediment build-up covered by large sediment waves trending sub-parallel to the dominant modern current pattern. Strong, northward-flowing bottom currents are thought to have eroded the base of the slope in the east and redeposited the sediments on the western margin and the trough floor. Mass wasting and terrigenous sediment input through canyons is regarded as the primary source of sediment in the region. The increase in the degree and frequency of canyon incision along the NE margin of the trough reflects increased terrigenous input from the Irish mainland and a possible glacial influence on the basin margin. The GLORIA images reflect a broad interplay of alongslope and downslope sediment transport processes in the Rockall Trough with sediments sourced from the NE margin and redistributed by currents along the western margin. Although alongslope and downslope processes are the major controlling factors, basin subsidence, Quaternary glaciations and glacio-eustatic sea-level fluctuations have also influenced the pattern of sedimentation in the Rockall Trough.
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  • 6
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    Slope failure features on the margins of the Rockall Trough (2001)
    In:  Geological Society Special Publication 188: 455-464.
    Details
    Publication Date: 2001-01-01
    Description: A TOBI sidescan sonar survey in the Irish sector of the Rockall Trough reveals the presence of a range of slope failure features of various sizes and extent along both the eastern and western margins. A number of different types are identified. These include incipient cuspate slides, slab failures and evolved slides, and debris flows. It is suggested that the incipient cuspate slides, slab failures and evolved slides represent slope failure of muddy sediments whereas the failures that gave rise to debris flows lie on steeper slopes and may be of less muddy composition. Many of the slope failure features are relatively recent (probably 〈15 ka), although some evidence points towards either a prolonged period of movement or a number of phases of slope movement locally along the margins. A comprehensive understanding of the nature, distribution, age and controls on the formation of the slope failure features will be necessary in planning the likely location of sea-bed structures in the event of petroleum development in the region.
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  • 7
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    Comparative Tertiary stratigraphic evolution of the Porcupine and Rockall basins (2001)
    In:  Geological Society Special Publication 188: 323-344.
    Details
    Publication Date: 2001-01-01
    Description: The Tertiary development of the Porcupine and Rockall basins is compared in terms of stratigraphy and sedimentation. Four main unconformities are correlated between the basins and these are interpreted as being of Paleocene (C40), latest Eocene-Early Oligocene (C30), latest Early Miocene (C20) and Early Pliocene (C10) age. Seismic stratigraphic analysis of both basins suggests a greater similarity in post-Eocene deposition than in the Paleocene to Eocene stratigraphy. During Early Tertiary time a regressive succession, punctuated by minor transgressions, marks a major interruption in the general post-rift thermal subsidence pattern of the region. This regression, possibly triggered by lithospheric thermal effects and/or ridge-push stresses, resulted in deltaic and submarine fan deposition in the Porcupine Basin, with submarine channel trends indicating that sediment was sourced mainly from the Porcupine High to the north and west. Sand deposition in the Porcupine Basin occurred principally during Mid- to Late Eocene times. In contrast, Early Eocene sand input is postulated in the Rockall Basin, whereas deposition during the Mid- to Late Eocene times was more mud-prone. In Oligocene and Mio-Pliocene times, sediment build-ups, interpreted as contourites, developed towards the margins of both basins, with sedimentation principally influenced by oceanographic circulation patterns at this time. During Neogene to Recent times limited marginal sediment influx occurred in the Porcupine Basin whereas sediment input continued locally, during Neogene time, in the Hebrides region of the Rockall Basin.
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  • 8
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    The petroleum exploration of Ireland's offshore basins: introduction (2001)
    In:  Geological Society Special Publication 188: 1-8.
    Details
    Publication Date: 2001-01-01
    Description: Ireland is virtually encircled by sedimentary basins (Fig. 1) that developed in response to a series of rift episodes interspersed with periods of thermal subsidence. A number of inversion episodes also played a role in the development of sediment source areas and in the structuring of the basins. These basins can be categorized into two groups. The first comprises the basins of Northern Ireland, the Irish Sea and Celtic Sea areas, and the inboard basins (Slyne, Erris and Donegal basins) of the Atlantic margin. They generally have a NE-SW elongate morphology and typically lie within 100km of the shore. Their sedimentary fill is predominantly of pre-Tertiary age and they have no major bathymetric expression. The second group, comprising the outboard basins of the Atlantic margin (Goban Spur, Porcupine, Rockall and Hatton basins), lies in deep water. These basins are characterized by having an extensive surface area, typically containing a predominantly Cretaceous and Tertiary succession and having an underfilled sedimentary character. The Irish offshore basins have been the focus of intermittent phases of exploration since the first well was drilled in 1970. To date, a total of 136 wells has been drilled (Fig. 2) with 37 of these in the basins west of Ireland. The total cost of wells in the Irish offshore, in 2001 prices, is approximately IR {pound}1500 million. A significant amount of 2D reflection seismic data has been acquired (Fig. 3), both as speculative and proprietary surveys. Two commercial gas fields (Kinsale Head and Ballycotton) are currently in ... This 250-word extract was created in the absence of an abstract.
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  • 9
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    Large-scale, linked drainage systems in the NW European Triassic: insights from the Pb isotopic composition of detrital K-feldspar (2012)
    Geological Society of London
    Details
    Publication Date: 2012-05-12
    Description: Pb isotopic data from K-feldspars in Middle Triassic (Anisian) sandstones in the Wessex Basin, onshore SW UK, and the East Irish Sea Basin, some 350 km to the north, show that the same grain populations are present. This indicates that the drainage system (the ‘Budleighensis’ river) feeding these basins originated from the same source/s, most probably the remnant Variscan uplands to the south. Fluvial and aeolian sandstones have the same provenance, suggesting that if water- and wind-driven sands were originally derived from different sources, this has been obscured through reworking prior to final deposition. Significant recycling of feldspar from arkosic sandstones in earlier sedimentary basins can be ruled out. The provenance data agree with previous depositional models, indicating transport distances in excess of 400 km, with a drainage pattern that linked separate basins. This supports the idea that the regional fluvial system was driven by topography and episodic flooding events of sufficient magnitude to overcome evaporation and infiltration over hundreds of kilometres. Importantly, this drainage system appears to have been isolated and independent from those operating contemporaneously to the NW of the Irish and Scottish massifs, where the remnant Variscan uplands apparently exerted no influence on drainage or sand supply.
    Print ISSN: 0016-7649
    Topics: Geosciences
    Published by Geological Society of London
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  • 10
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    An overview of the Upper Palaeozoic-Mesozoic stratigraphy of the NE Atlantic region (2016)
    Geological Society (of London)
    Details
    Publication Date: 2016-08-13
    Description: This study describes the distribution and stratigraphic range of the Upper Palaeozoic–Mesozoic succession in the NE Atlantic region, and is correlated between conjugate margins and along the axis of the NE Atlantic rift system. The stratigraphic framework has yielded important new constraints on the timing and nature of sedimentary basin development in the NE Atlantic, with implications for rifting and the break-up of the Pangaean supercontinent. From a regional perspective, the Permian–Triassic succession records a northwards transition from an arid interior to a passively subsiding, mixed carbonate–siliciclastic shelf margin. A Late Permian–earliest Triassic rift pulse has regional expression in the stratigraphic record. A fragmentary paralic to shallow-marine Lower Jurassic succession reflects Early Jurassic thermal subsidence and mild extensional tectonism; this was interrupted by widespread Mid-Jurassic uplift and erosion, and followed by an intense phase of Late Jurassic rifting in some (but not all) parts of the NE Atlantic region. The Cretaceous succession is dominated by thick basinal-marine deposits, which accumulated within and along a broad zone of extension and subsidence between Rockall and NE Greenland. There is no evidence for a substantive and continuous rift system along the proto-NE Atlantic until the Late Cretaceous.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society (of London)
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