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Comptes Rendus Géoscience
Volume 336, n° 2
pages 125-133 (février 2004)
Doi : 10.1016/j.crte.2003.10.021
Received : 26 May 2003 ;  accepted : 28 October 2003
Stratigraphic architecture of the Pyreneo-Languedocian submarine fan, Gulf of Lions, western Mediterranean Sea

Antonio Tadeu  dos Reis a * ,  Christian  Gorini b ,  Alain  Mauffret c ,  Michelle  Mepen a
aDepartamento de Oceanografia, Universidade do Estado do Rio de Janeiro/UERJ-Brazil, Rua São Francisco Xavier, 524, 4° Andar, Maracanã, Rio de Janeiro-RJ, Brazil, CEP: 22550-900 
bLaboratoire des processus et bilans des domaines sédimentaires, université des sciences et technologies de Lille1/UNST, bât. SN5, 59655 Villeneuve d'Ascq, France 
cLaboratoire de tectonique, université Pierre et Marie-Curie, Paris-6, 4, place Jussieu, tour 26-0, case 129, 75252 Paris cedex, France 

*Corresponding author.
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The Pyreneo-Languedocian submarine sediment body, located in the western sector of the Gulf of Lions, is an example of a fan-like depositional system essentially controlled by salt tectonics. The area was subjected to a combined effect of overburden subsidence into the evacuated salt layer and a significant distal salt thickening, due to preferential basinward salt migration. This mode of salt migration impacted the Quaternary sea-bottom morphology by creating a large midslope topographic low, providing space accommodation for the Pyreneo-Languedocian fan. At gulf scale, the fan is a unique feature because unchannelized sedimentary environment in the area occurs at slope level, thus in minor water depth in relation to all other deep-water sedimentary systems offshore Gulf of Lions. To cite this article: A.T. dos Reis et al., C. R. Geoscience 336 (2004).

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L'édifice sédimentaire sous-marin Pyrénéo-Languedocien correspond à un surépaississement sédimentaire dans la marge ouest du golfe du Lion. Le mode de croissance de cet édifice est celui d'un éventail sédimentaire, dont la mise en place est largement dictée par la tectonique salifère qui affecte la marge du golfe du Lion. À l'échelle du secteur, la structuration salifère se fait sous les effets combinés de la fracturation et de la subsidence de blocs, consécutive au fluage du sel latéralement contraint. Ceci mène à l'entassement du sel en aval du système, entraînant un soulèvement des compartiments distaux par une déformation positive du relief. Ces effets conjugués de la tectonique salifère induisent la formation d'un bassin, qui est à l'origine de l'espace d'accommodation sédimentaire des apports non chenalisés qui forment l'édifice sous-marin Pyrénéo-Languedocien. Pour citer cet article : A.T. dos Reis et al., C. R. Geoscience 336 (2004).

Mots clés  : Pyreneo-Languedocian fan ; salt tectonics ; salt-sediment interaction ; Gulf of Lions ; France.

Mots clés  : éventail Pyrénéo-Languedocien ; tectonique salifère ; interaction sel-sédiment ; golfe du Lion ; France.




© 2003  Académie des sciences@@#104156@@

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