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| Hanquiez, V; Mulder, T; Lecroart, P; Gonthier, E; Marches, E; Voisset, Michel. |
| In the Gulf of Cadiz, the hydrodynamic process acting on particle transport and deposition is a strong density-driven bottom current caused by the outflow of the saline deep Mediterranean water at the Strait of Gibraltar: the Mediterranean Outflow Water (MOW). New high resolution acoustic data including EM300 multibeam echo-sounder, deep-towed acoustic system SAR and very high resolution seismic, completed by piston cores collected during the CADISAR cruise allow to improve the understanding of the hydrodynamics of the MOW in the eastern part of the Gulf of Cadiz. Interpretation of data corrects the previous model established in this area and allows, for the first time, the accurate characterization of various bedforms and erosive structures along the MOW... |
| Tipo: Text |
Palavras-chave: Instabilities; Sedimentary processes; Acoustic facies; Deep towed SAR; Contourites; Mediterranean Outflow Water MOW; Gulf of Cadiz. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3676.pdf |
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| Gervais, A; Mulder, T; Savoye, Bruno; Gonthier, E. |
| The Golo Margin in eastern Corsica is dissected by four canyons and two gullies which fed turbidite systems. Study of the dispersal of surficial sediments and flow dynamic in the Golo system is based on Kullenberg and interface cores interpreted in relation to a previously published seismic dataset. Cores were described in detail and interpreted within a sedimentary and stratigraphic framework. During the last 42,000 years, gravity processes which occurred in the large systems with a canyon source were mainly slide-induced, differentiated turbulent surges and hyperpycnal flows. Processes occurring in the small system with a gully source are mainly hyperconcentrated and concentrated flows. Deposits from the Corsican Margin can intercalate with products of... |
| Tipo: Text |
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| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-3594.pdf |
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| Gaudin, Mathieu; Berne, Serge; Jouanneau, J.-m.; Palanques, A; Puig, P; Mulder, T; Cirac, P; Rabineau, Marina; Imbert, P. |
| Nowadays, the Gulf of Lions continental shelf and slope are under the influence of dense water cascading, wind-induced bottom currents and the geostrophic Northern Current. In order to characterize sedimentary activity at the shelf break, several interface and piston cores were taken in the Bourcart canyon head and a current meter equipped with temperature, conductivity, pressure and turbidity sensors was moored during the 2003-2004 winter season. Even if the canyon is not connected directly to continental sources since Last Glacial Maximum, detailed grain size, X-ray and sediment facies analysis of interface cores show that down to 350 m water depth, the canyon head is blanketed by up to 1.5 m of structureless muddy medium-grained sand. 210 Pb-exc... |
| Tipo: Text |
Palavras-chave: Pb 210exc activity; Sand deposits; Cascading; Submarine canyon. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-2324.pdf |
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| Mulder, T; Savoye, Bruno; Syvitski, Jpm; Parize, O. |
| The Var River is 120 km long upon entry into the western Mediterranean Sea and drains a 2820 km(2) basin (Fig. 1). A steep submarine canyon connects directly to the river mouth (Fig. 2). The submarine canyon is sinuous and shows typical badland features such as high slopes resulting from erosion (Fig. 3). The average water discharge 152-53 m(3) s(-1); Fig. 4) can be multiplied by tens during spring or fall ''flash floods'', when suspended sediment concentration can reach many tells of kg m(-3). The rating coefficient b corresponding to instantaneous discharges is 1.534 (Eq. (1) and Fig. 5, curve 1), according to data published by Laurent (1971), but might be larger if suspended sediment concentration related to floods occurring after a dry period (Fig. 5,... |
| Tipo: Text |
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| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20421/18088.pdf |
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| Bourillet, Jean-francois; Zaragosi, S; Mulder, T. |
| The sedimentary infill of the Bay of Biscay off Ireland, UK, France and Spain took place in four phases. The last one (35 Ma to present) is characterised by gravitational, pelagic, contouritic and glacigenic processes leading to the setup of three deep sea systems. To the North, the Celtic and Armorican fans are fed by a "canyon-dominated" margin and its connection with the "Manche" palaeoriver, which drained a large area of western Europe. To the South, the Cap-Ferret fan results from the evolution of a "tectonic-dominated" margin and the erosion of the Pyrenee mountains. |
| Tipo: Text |
Palavras-chave: Sedimentology; Geomorphologya; Deep sea; Bay of Biscay; French Atlantic margin. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-2137.pdf |
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