Aspects of the Cenozoic deformational history of the Northeast Faroe–Shetland Basin, Wyville–Thomson Ridge and Hatton Bank areas

Johnson, Howard D.; Ritchie, J. D.; Hitchen, K.; McInroy, David; Kimbell, G. S.

doi:10.1144/0060993

Cited by 47 publications

(100 citation statements)

References 26 publications

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“…Some highs related to cliffs formed by tectonic activity leading to vertical displacement (Figures 5c and 5e). Several compressional events have been noted in the Faroe-Hatton region during the Cenozoic with the major event being intra Late Eocene (Johnson et al 2005). However, some of the topographic highs appeared as sedimentary features developed within the Cenozoic post igneous activity (Figure 5f).…”

Section: Survey Stationsmentioning

confidence: 97%

Cold-water coral reef frameworks, megafaunal communities and evidence for coral carbonate mounds on the Hatton Bank, north east Atlantic

Roberts

Henry

Long

et al. 2008

Facies

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Offshore banks and seamounts sustain diverse megafaunal communities including framework reefs formed by cold-water corals. Few studies have quantified environmental effects on the alpha or beta diversity of these communities. We adopted an interdisciplinary approach that used historical geophysical data to identify topographic highs on Hatton Bank, which were surveyed visually. The resulting photographic data were used to examine relationships between megafaunal communities and macrohabitat, the latter defined into six categories (mud, sand, cobbles, coral rubble, coral framework, rock). The survey stations revealed considerable small-scale variability in macrohabitat from exposed Late Palaeocene lava flows to quiescent muddy habitats and coral-built carbonate mounds. The first reported evidence for coral carbonate mound development in UK waters is presented, which was most pronounced near present day or former sites of topographic change suggesting that local current acceleration favoured coral framework growth and mound initiation.Alpha diversity varied significantly across macrohabitats, but not between rock and coral rubble, or between smaller-grain sized categories of cobbles, sand and mud. Community composition differed between most macrohabitats, and variation in beta diversity across Hatton Bank was largely explained by fine-scale substratum. Certain megafauna were clearly associated with particular macrohabitats, with stylasterid corals notably associated with cobble and rock habitats and coral habitats characterised by a diverse community of suspension-feeders. The visual surveys also produced novel images of deep-water megafauna including a new photographic record of the gorgonian coral Paragorgia arborea, a species not previously reported from Rockall Plateau.Further interdisciplinary studies are needed to interpret beta diversity across these and other environmental gradients on Hatton Bank. It is clear that efforts are also needed to improve our understanding of the genetic connectivity and biogeography of vulnerable deep-water ecosystems and to develop predictive models of their occurrence that can help inform future conservation measures.

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Section: Survey Stationsmentioning

confidence: 97%

Cold-water coral reef frameworks, megafaunal communities and evidence for coral carbonate mounds on the Hatton Bank, north east Atlantic

Roberts

Henry

Long

et al. 2008

Facies

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“…Boldreel & Andersen (1993 recognized PaleoceneEocene and Eocene -Oligocene compressive growth phases, and thinning and onlap in seismic reflection data suggest an enhanced phase of growth in the Mid-Miocene (Fig. 2b), as well as possible further growth during Pliocene to Recent times (Ritchie et al 2003;Johnson et al 2005;Stoker et al 2005a). Post-rift thermal subsidence in the flanking Faroe -Shetland Basin has probably enhanced the Fugloy Ridge rather than it being a solely compressional feature (Ritchie et al 2011).…”

Section: Faroe-shetland Areamentioning

confidence: 99%

“…2b), E and F (the Pilot Whale Anticline) (Davies & Cartwright 2002;Davies et al 2004;Ritchie et al 2003Ritchie et al , 2008Johnson et al 2005). Only selected features are shown in Figure 1: see Ritchie et al (2008) for more detail.…”

Section: Faroe-shetland Areamentioning

confidence: 99%

“…To the south of the Faroe Platform, the Munkagrunnur Ridge is a NNW-trending 135 km-long anticline with seabed expression (Boldreel & Andersen 1993;Johnson et al 2005;Ritchie et al 2008Ritchie et al , 2011. Boldreel & Andersen (1993) suggested that the ridge is part of a set of ramp-anticlines, along with the Ymir and Wyville Thomson ridges, which formed during the Late Paleocene -Eocene above a northwards-dipping crustal fault in response to seafloor spreading.…”

Section: Faroe-shetland Areamentioning

confidence: 99%

“…The Wyville Thomson Ridge is a 200 km-long WNW-trending basalt anticline with a maximum fold amplitude of 4000 m, a width of around 20 km and clear bathymetric expression (Boldreel & Andersen 1993;Johnson et al 2005;Stoker et al 2005a, b;Ritchie et al 2011). A well-imaged succession on the NE side of the ridge shows thinning of Paleocene lavas and Early and Mid-Eocene sediments towards its axis, indicative of growth periods (Fig.…”

Section: Southern Faroe-shetland Basin To the Northern Rockall Basinmentioning

confidence: 99%

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Controls on the location of compressional deformation on the NW European margin

Kimbell

Stewart

Gradmann

et al. 2016

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The distribution of Cenozoic compressional structures along the NW European margin has been compared with maps of the thickness of the crystalline crust derived from a compilation of seismic refraction interpretations and gravity modelling, and with the distribution of high-velocity lower crust and/or partially serpentinized upper mantle detected by seismic experiments. Only a subset of the mapped compressional structures coincide with areas susceptible to lithospheric weakening as a result of crustal hyperextension and partial serpentinization of the upper mantle. Notably, partially serpentinized upper mantle is well documented beneath the central part of the southern Rockall Basin, but compressional features are sparse in that area. Where compressional structures have formed but the upper mantle is not serpentinized, simple rheological modelling suggests an alternative weakening mechanism involving ductile lower crust and lithospheric decoupling. The presence of pre-existing weak zones (associated with the properties of the gouge and overpressure in fault zones) and local stress magnitude and orientation are important contributing factors.Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.

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Neogene to recent contraction and basin inversion along the Nubia-Iberia boundary in SW Iberia

et al. 2017

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The SW of Iberia is currently undergoing compression related to the convergence between Nubia and Iberia. Multiple compressive structures, and their related seismic activity, have been documented along the diffuse Nubia‐Iberia plate boundary, including the Gorringe bank west of the Gulf of Cadiz, and the Betic‐Rif orogen to the east. Despite seismic activity indicating a dominant compressive stress along the Algarve margin in the Gulf of Cadiz, the structures at the origin of this seismicity remain elusive. This paper documents the contractional structures that provide linkage across the Gulf of Cadiz and play a major role in defining the present‐day seismicity and bathymetry of this area. The structures described in this paper caused the Neogene inversion of the Jurassic oblique passive margin that formed between the central Atlantic and the Ligurian Tethys. This example of a partially inverted margin provides insights into the factors that condition the inversion of passive margins.

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Aspects of the Cenozoic deformational history of the Northeast Faroe–Shetland Basin, Wyville–Thomson Ridge and Hatton Bank areas

Cited by 47 publications

References 26 publications

Cold-water coral reef frameworks, megafaunal communities and evidence for coral carbonate mounds on the Hatton Bank, north east Atlantic

Cold-water coral reef frameworks, megafaunal communities and evidence for coral carbonate mounds on the Hatton Bank, north east Atlantic

Controls on the location of compressional deformation on the NW European margin

Neogene to recent contraction and basin inversion along the Nubia-Iberia boundary in SW Iberia

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