FN Archimer Export Format
PT J
TI Direct sediment transfer from land to deep-sea: Insights into shallow multibeam bathymetry at La Réunion Island
BT 
AF BABONNEAU, Nathalie
   DELACOURT, Christophe
   CANCOUET, R.
   SISAVATH, Emmanuelle
   BACHELERY, Patrick
   MAZUEL, Aude
   JORRY, Stephan
   DESCHAMPS, Anne
   AMMANN, Jerome
   VILLENEUVE, N.
AS 1:1;2:1;3:1;4:2,3;5:2,4;6:1;7:3;8:1;9:1;10:2;
FF 1:;2:;3:;4:PDG-REM-GM-LES;5:;6:PDG-REM-GM-LES;7:PDG-REM-GM-LES;8:;9:;10:;
C1 Univ Brest, Inst Univ Europeen Mer, UBO, UMR CNRS Domaines Ocean 6538, F-29280 Plouzane, France.
   Univ Reunion, IPG Paris, UMR CNRS 7154, Lab Geosci Reunion, F-97715 St Denis Messag 9, Reunion, France.
   IFREMER, Geosci Marines, Lab Environm Sedimentaires, F-29280 Plouzane, France.
   Univ Clermont Ferrand, Observ Phys Globe Clermont Ferrand, UMR CNRS IRD 6524, Lab Magmas & Volcans, F-63038 Clermont Ferrand, France.
C2 UBO, FRANCE
   UNIV LA REUNION, FRANCE
   IFREMER, FRANCE
   UNIV CLERMONT FERRAND, FRANCE
SI BREST
   AUTRE
SE PDG-REM-GM
   IUEM
   PDG-REM-GM-LES
   PDG-REM-RDT-SI2M
   AUTRE
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.201
TC 43
TU Centre national de la recherche scientifique
   Institut National de l'Information Géographique et Forestière
   Institut de physique du globe
   Université Paris Diderot
   Université Pierre et Marie Curie
   Université de La Réunion
UR https://archimer.ifremer.fr/doc/00156/26697/24790.pdf
LA English
DT Article
CR ERODER 1
   ERODER 2 (METEOR 75-1A)
   FOREVER
   MD 182 / ERODER 3
   MD 184 / ERODER 4
BO Beautemps-Beaupré
   Meteor
   L'Atalante
   Marion Dufresne
DE ;submarine canyon;canyon head;turbidity current;hyperpycnal flow;coastal instability
AB Submarine canyon heads are key areas for understanding the triggering factors of gravity currents responsible for the transfer of detrital sediment to the deep basins. This contribution offers a detailed picture of canyon heads off La Réunion Island, with high-resolution multibeam bathymetry in the water depth range of 4–220 m. The present feeding of the Cilaos turbidite system, one of the largest modern volcaniclastic systems in the world, is deduced from morphological and sedimentological interpretations of newly acquired data. The study highlights small-scale sedimentary features indicating hydrodynamic and sedimentary processes.  A direct connexion between the Saint-Etienne river mouth and submarine canyons is evidenced by the complete incision of the shelf and the presence of canyon heads connected to the modern deltaic bar. This direct connection, supplied by river torrential floods (cyclonic floods every two or three years), suggests the continuity of high-density fluvial flows to submarine gravity flows, forming hyperpycnal flows in the canyon.  The initiation of secondary submarine gravity flows by storm waves (large austral waves and cyclonic waves) is also proposed for submarine canyons with large canyon heads developed in the surf zone from a sandy coastal bar. Bedforms in active canyon axis are considered as an indicator of the frequent activity of high-density turbidity currents.  Moreover, a morphological record of last glacial and deglacial sea level variations is preserved, and particularly the Last Glacial Maximum sea level with the presence of small vertical cliffs, observed in this bathymetric data, which likely corresponds to a paleo-shoreline or paleo-reefs.
PY 2013
PD DEC
SO Marine Geology
SN 0025-3227
PU Elsevier Science Bv
VL 346
UT 000328869900004
BP 47
EP 57
DI 10.1016/j.margeo.2013.08.006
ID 26697
ER

EF