FN Archimer Export Format
PT J
TI Massive sand beds attributed to deposition by dense water cascades in the Bourcart canyon head, Gulf of Lions (northwestern Mediterranean Sea)
BT 
AF GAUDIN, Mathieu
   BERNE, Serge
   JOUANNEAU, J.-M.
   PALANQUES, A
   PUIG, P
   MULDER, T
   CIRAC, P
   RABINEAU, Marina
   IMBERT, P
AS 1:1;2:2;3:1;4:3;5:3;6:1;7:1;8:4,6;9:5;
FF 1:;2:PDG-DOP-DCB-GM-LES;3:;4:;5:;6:;7:;8:;9:;
C1 Univ Bordeaux 1, DGO, UMR 5805, EPOC, F-33405 Talence, France.
   IFREMER, GMLES, F-29280 Plouzane, France.
   CSIC, Inst Ciencies Mar, E-08003 Barcelona, Spain.
   IUEM, UMR 6538, F-29280 Plouzane, France.
   TOTAL CST JF, F-64000 Pau, France.
C2 UNIV BORDEAUX, FRANCE
   IFREMER, FRANCE
   CSIC, SPAIN
   IUEM, FRANCE
   TOTAL SA, FRANCE
   CNRS, FRANCE
SI BREST
SE PDG-DOP-DCB-GM-LES
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
IF 2.029
TC 50
TU Centre national de la recherche scientifique
   Institut de recherche pour le développement
   Institut français de recherche pour l'exploitation de la mer
   Service Hydrographique et Océanographique de la Marine
   Université de Bordeaux
   Université de Bretagne Occidentale
   Université de Bretagne-Sud
   École pratique des hautes études
UR https://archimer.ifremer.fr/doc/2006/publication-2324.pdf
LA English
DT Article
CR CALMAR99
   GMO1
   GMO2
   GMO2 - CARNAC
   IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   MARION
   STRATAFORM 1
BO L'Europe
   Le Suroît
   Thalia
   Marion Dufresne
DE ;Pb 210exc activity;Sand deposits;Cascading;Submarine canyon
AB 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 activity measurements demonstrate present day sedimentary activity of the canyon head. Time series of currents with peak velocity reaching 0.37 m/s, suspended sediment concentration and temperature indicate that dense water cascading is the main process allowing the reworking, transport and accumulation of sand within the canyon head, even though winter 2003-2004 was characterized by low cascading events compared to other years. These sand beds, called "cascadite" constitute a new type of deposit that differs from other typical slope deposits (turbidites, hyperpycnites, contourites) in terms of flow duration and sedimentological characteristics. They are similar to shallow water contourites. They might be time-equivalent to the recent turbidites described throughout the deep western Gulf of Lions basin.
PY 2006
PD DEC
SO Marine Geology
SN 0025-3227
PU Elsevier
VL 234
IS 1-4
UT 000243253100007
BP 111
EP 128
DI 10.1016/j.margeo.2006.09.020
ID 2324
ER

EF