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Van Rooij, D.; Blamart, D.; Richter, T.; Wheeler, A.; Kozachenko, M.; Henriet, J.-p.. |
The Belgica cold-water coral banks on the eastern slope of the Porcupine Seabight are closely associated with bottom currents. In order to better understand the local temporal and spatial characteristics, as well as the palaeoclimatologic influences, a 26 m long core, taken on a small contourite drift, was studied. This sediment record of approximately 100 ka BP reveals new insights into the regional glacial and sedimentary processes, which are intrinsically linked to several geological, climatological, biological and hydrodynamic variables. The glacial sequences in the core contain six ice-rafting events (IRE). They are comparable with the North Atlantic Heinrich Events, although their characteristics show dominant influences from the proximal... |
Tipo: Text |
Palavras-chave: Contourite; Ice-rafting event; British-Irish ice sheet; Porcupine Basin; Coral banks. |
Ano: 2007 |
URL: https://archimer.ifremer.fr/doc/00233/34438/32929.pdf |
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De Mol, Ben; Kozachenko, M; Wheeler, Andy; Alvares, Hugo; Henriet, Jean-pierre; Olu, Karine. |
High-resolution seismic profiles, swath bathymetry, side-scan sonar data and video imageries are analysed in this detailed study of five carbonate mounds from the Belgica mound province with special emphasis on the well-surveyed Therese Mound. The selected mounds are located in the deepest part of the Belgica mound province at water depths of 950 m. Seismic data illustrate that the underlying geology is characterised by drift sedimentation in a general northerly flowing current regime. Sigmoidal sediment bodies create local slope breaks on the most recent local erosional surface, which act as the mound base. No preferential mound substratum is observed, neither is there any indication for deep geological controls on coral bank development. Seismic evidence... |
Tipo: Text |
Palavras-chave: Carbonate mounds; Cold water corals; Lophelia pertusa; Porcupine Seabight; Coral banks; Belgica mound province; Therese Mound. |
Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2307.pdf |
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