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| Terhzaz, Loubna; Hamoumi, Naima; Spezzaferri, Silvia; Lotfi, El Mostapha; Henriet, Jean-pierre. |
| Sedimentological and geochemical studies of boxcores from the Brittlestar Ridge I and Cabliers carbonate mounds, along the Moroccan Mediterranean margin, show that sediments are composed of cold water scleratian corals and micritic mud, muddy micrite or muddy allochem limestone matrix, outlining seven different facies that can be attributed to “cluster reefs”. The mixed siliciclastic/carbonate sediments have been derived from both extra- and intrabasinal sources. Extra-basinal sources may be the geological formations outcropping in the Moroccan hinterland and Sahara, the latter including corals and associated bioclasts. Sediments were transported by wind and rivers and redistributed by bottom currents and local upwelling. Our results confirm the role of... |
| Tipo: Text |
Palavras-chave: Carbonate mounds; Cold water corals; Sedimentology; Sedimentary geochemistry; Moroccan Mediterranean margin. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00445/55699/57370.pdf |
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| Huvenne, Veerle A. I.; Bailey, W. R.; Shannon, P. M.; Naeth, J; Di Primio, R.; Henriet, J. P.; Horsfield, B.; De Haas, H.; Wheeler, A; Olu, Karine. |
| The Magellan mound province is one of the three known provinces of carbonate mounds or cold-water coral banks in the Porcupine Seabight, west of Ireland. It has been studied in detail using a large and varied data set: 2D and 3D seismic data, sidescan sonar imagery and video data collected during ROV deployment have been used to describe the mounds in terms of origin, growth processes and burial. The aim of this paper is to present the Magellan mounds and their setting in an integrated, holistic way. More than 1,000 densely spaced and mainly buried mounds have been identified in the area. They all seem to be rooted on one seismic reflection, suggesting a sudden mound start-up. Their size and spatial distribution characteristics are presented, together with... |
| Tipo: Text |
Palavras-chave: Numerical basin modelling; Fault analysis; Mound morphology; Spatial distribution; Porcupine Basin; Cold water corals; Carbonate mounds. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2312.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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| Foubert, A.; Van Rooij, D.; Blamart, D.; Henriet, J.-p.. |
| Three provinces, characterized by the presence of carbonate mounds interpreted as cold-water coral banks have been reported in Porcupine Seabight, SW of Ireland and were recently subjected to many detailed studies. This contribution discusses the use of X-ray imagery and physical properties in deciphering palaeoceanographic, sedimentological and biological processes. Physical property core logging and X-ray imagery are used to identify and describe sedimentation regimes and so their respective palaeoceanographic and palaeoclimatological settings in two mound provinces, respectively the Belgica mound province and the Magellan mound province. Both provinces show at present time clear differences in the hydrodynamic environment. This study confirms that also... |
| Tipo: Text |
Palavras-chave: X-ray imagery; Physical core logging; Carbonate mounds; Porcupine Basin; Palaeoceanography. |
| Ano: 2007 |
URL: https://archimer.ifremer.fr/doc/00233/34451/32916.pdf |
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