FN Archimer Export Format PT J TI Sedimentary sequences in the Gulf of Lion: A record of 100,000 years climatic cycles BT AF RABINEAU, Marina BERNE, Serge ASLANIAN, Daniel OLIVET, Jean-Louis JOSEPH, Philippe GUILLOCHEAU, François BOURILLET, Jean-Francois LE DREZEN, Eliane GRANJEON, Didier AS 1:1,2;2:2;3:2;4:2;5:3;6:4;7:2;8:2;9:4; FF 1:;2:PDG-DOP-DCB-GM-LES;3:PDG-DOP-DCB-GM-LGG;4:PDG-DOP-DCB-GM-LGG;5:;6:;7:PDG-DOP-DCB-GM-LES;8:PDG-DOP-DCB-GM-LES;9:; C1 IUEM, UMR6538 Domaines Ocean, F-29280 Plouzane, France. IFREMER, Lab Environm Sedimentaires, BP 70, F-29280 Plouzane, France. Inst Francais Petr, Div Geol Geochim, F-92506 Rueil Malmaison, France. Univ Rennes 1, F-35042 Rennes, France. C2 IUEM, FRANCE IFREMER, FRANCE IFP, FRANCE UNIV RENNES, FRANCE SI BREST SE PDG-DOP-DCB-GM-LES PDG-DOP-DCB-GM-LGG IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 1.255 TC 136 TU Centre national de la recherche scientifique Institut français de recherche pour l'exploitation de la mer Service Hydrographique et Océanographique de la Marine Université de Bretagne Occidentale Université de Bretagne-Sud UR https://archimer.ifremer.fr/doc/2005/publication-368.pdf LA English DT Article CR IMAGES V LEG 1-MD114 IMAGES V LEG 4-MD114 MARION STRATAFORM 1 BO Marion Dufresne Le Suroît DE ;Stratigraphic modelling;Cores;High resolution seismic data;Glacioeustatism;Climatic cycles;Gulf of Lion;Western Mediterranean AB The wide continental shelf of the Gulf of Lion (up to 70 km) has been the object of numerous investigations since the early days of oceanography. Yet, the question of sequences duration, the mechanisms of deposition and factors implied remained unanswered. A study of a very dense grid of Very High Resolution (VHR) seismic reflection (Sparker) data associated with surficial cores both, collected by IFREMER between 1992 and 2001 on the outer shelf and upper slope offshore of Sète in the Languedoc region gives a new insight into these issues. Analysis of the 3D geometry of the sedimentary record reveals a basic depositional pattern consisting of a pair of horizontally juxtaposed and downlapping prisms. Prism PI with low angle clinoforms (<1°) lies on the upper part of the shelf and is interpreted to be prodeltaic-offshore deposits. Prism PII with steeply dipping clinoforms (approximately 4°) lies on the outer shelf between 40 and 70 km from the present day coastline and is interpreted to be littoral deposits. Results obtained from integrating lithology, palynology, micropaleontology, seismic stratigraphy, stratigraphic simulation, support the hypothesis that the basic depositional pattern records a 100 000-years glacioeustatic (interglacial/glacial) cycle. As previously suggested by Aloïsi [Aloïsi, J.C., 1986. Sur un modèle de sédimentation deltaïque: contribution à la connaissance des marges passive, Thèse de Doctorat d'Etat. Université de Perpignan, 162 pp], prisms PI corresponds to deposition at high sea level and prisms PII to deposition during low sea level at glacial maxima. Five sequences of paired prisms capped by five major erosion surfaces have been identified and modelled showing that the corresponding glacioeustatic cycles (the last five cycles at least) are recorded on the shelf of the western part of the Gulf of Lion. PY 2005 PD AUG SO Marine and Petroleum Geology SN 0264-8172 PU Elsevier VL 22 IS 6-7 UT 000232437500006 BP 775 EP 804 DI 10.1016/j.marpetgeo.2005.03.010 ID 368 ER EF