Post-glacial persistence of turbiditic activity within the Rhone deep-sea turbidite system (Gulf of Lions, Western Mediterranean): Linking the outer shelf and the basin sedimentary records

Type Article
Date 2009-02
Language English
Author(s) Dennielou BernardORCID1, Jallet Laurent2, Sultan NabilORCID1, Jouet Gwenael1, 3, Giresse Pierre2, Voisset Michel1, Berne Serge1, 2
Affiliation(s) 1 : IFREMER, Dept Marine Geosci, F-29280 Plouzane, France.
2 : Univ Perpignan, IMAGES, F-66000 Perpignan, France.
3 : Univ Bretagne Occidentale, UMR Domaines Ocean 6538, IEUM, F-29280 Plouzane, France.
Source Marine Geology (0025-3227) (Elsevier), 2009-02 , Vol. 257 , N. 1-4 , P. 65-86
DOI 10.1016/j.margeo.2008.10.013
WOS© Times Cited 11
Keyword(s) Holocene, Late Pleistocene, Sea level, Turbidites, Sand, Outer shelf, Canyons
Abstract Emplacement of post-glacial turbidites is commonly controlled by rapid changes in sea level or by seismicity. On the continental rise of the Gulf of Lions (Western Mediterranean), an aseismic area, we identified turbiditic beds deposited during the rising stage and highstand of sea level. Swath bathymetry, sediment cores, in situ Cone Penetrating Tests (CPTU), heavy mineral associations and radiocarbon dating determined the source, composition, distribution and age of the turbiditic beds. Turbidites are composed of homogeneous to positively graded silts to medium sand with quartz (up to 90%), shell debris and shelfal benthic faunas. Their distribution on the sea floor is very patchy and controlled by abundant inherited erosional bedforms. Their source is found in relict regressive sands at the outershelf. Their deposition occurred just after the onset of the post-glacial sea level rise and the concomitant sediment starvation of the Rhone deep sea turbiditic system until recently. Whilst canyons are fed with sand by strong seasonal hydro-sedimentary dynamics on the outershelf, the emplacement of post-glacial turbidites is not controlled by sea level changes but probably by the periodic flushing of the canyons. Our study revealed that this low energy aseismic margin undergoes significant transport of sand, down to the base of slope, during the sea-level rise and the Holocene highstand.
Full Text
File Pages Size Access
publication-6316.pdf 10 2 MB Open access
Top of the page

How to cite 

Dennielou Bernard, Jallet Laurent, Sultan Nabil, Jouet Gwenael, Giresse Pierre, Voisset Michel, Berne Serge (2009). Post-glacial persistence of turbiditic activity within the Rhone deep-sea turbidite system (Gulf of Lions, Western Mediterranean): Linking the outer shelf and the basin sedimentary records. Marine Geology, 257(1-4), 65-86. Publisher's official version : https://doi.org/10.1016/j.margeo.2008.10.013 , Open Access version : https://archimer.ifremer.fr/doc/00000/6316/