FN Archimer Export Format PT J TI The Var turbidite system (Ligurian Sea, northwestern Mediterranean) - morphology, sediment supply, construction of turbidite levee and sediment waves: implications for hydrocarbon reservoirs BT AF MIGEON, Sébastien MULDER, Thierry SAVOYE, Bruno SAGE, Françoise AS 1:1;2:2;3:3;4:1; FF 1:;2:;3:PDG-DOP-DCB-GM-LES;4:; C1 Observ Villefranche, Geosci Azur, F-06235 Villefranche Sur Mer, France. Univ Bordeaux 1, UMR 5805, EPOC, F-33400 Talence, France. IFREMER, Lab Environm Sedimentaires, F-29280 Plouzane, France. C2 OBSERV OCEANOL VILLEFRANCHE, FRANCE UNIV BORDEAUX, FRANCE IFREMER, FRANCE SI BREST SE PDG-DOP-DCB-GM-LES IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 0.677 TC 41 UR https://archimer.ifremer.fr/doc/2006/publication-2258.pdf LA English DT Article CR DEADYN 96 DESSIPGP EOPGS M1-P6 2019 MAGIRAA 96 MAGISIS BO Téthys II DE ;Geomorphology;Sediment waves;Turbidity;Mediterranean sea;Ligurian basin AB The Var turbidite system is a small sandy system located in the Ligurian Basin. It was deposited during the Pliocene-Quaternary in a flat-floored basin formed during the Messinian salinity crisis. The system was fed through time by the Var and Paillon canyons that connect directly to the Var and Paillon rivers. It is still active during the present sea-level highstand. Two main mechanisms are responsible for gravity-flow triggering in the Var turbidite system: (1) mass-wasting events affect mainly the upper part of the continental slope, in areas where volumes of fresh sediment delivered by rivers are highest, and result from the under-consolidation state of slope sediments and earthquakes, and (2) high-magnitude river floods resulting from melting of snow and convective rainfall during fall and spring seasons, and generating hyperpycnal turbidity currents at river mouths when the density of freshwater transporting suspended particles exceeds that of ambient seawater. Failure- and flood-induced gravity flows are involved through time in the construction of the Var Sedimentary Ridge, the prominent right-hand levee of the Var system, and sediment waves. Processes of construction of both the Var Ridge and sediment waves are closely connected. Sandy deposits are thick and abundant in the eastern (downchannel) part of the ridge. Their distribution is highly constrained by the strong difference of depositional processes across the sediment waves, potentially resulting through time in the individualization of large and interconnected sand bodies. PY 2006 PD DEC SO Geo-Marine Letters SN 0276-0460 PU Springer VL 26 IS 6 UT 000242295400006 BP 361 EP 371 DI 10.1007/s00367-006-0047-x ID 2258 ER EF