FN Archimer Export Format
PT J
TI Contourite identification along Italian margins: The case of the Portofino drift (Ligurian Sea)
BT 
AF CATTANEO, Antonio
   MIRAMONTES, Elda
   SAMALENS, Kevin
   GARREAU, Pierre
   CAILLAUD, Matthieu
   MARSSET, Bruno
   CORRADI, Nicola
   MIGEON, Sebastien
AS 1:1,2;2:1;3:1,3;4:4;5:5;6:1;7:6;8:3;
FF 1:PDG-REM-GM-LAD;2:;3:;4:PDG-ODE-LOPS-OC;5:PDG-ODE-DYNECO-DHYSED;6:PDG-REM-GM-LAD;7:;8:;
C1 IFREMER, Geosci Marines, ZI Pointe Diable, BP70, Plouzane, France.
   CNR ISMAR, Via Gobetti 101, I-40129 Bologna, Italy.
   GEOAZUR, UMR7329, 250 Rue A Einstein, F-06560 Valbonne, France.
   IFREMER, UMR LOPS, ZI Pointe Diable, BP70, Plouzane, France.
   IFREMER, DYNECO, ZI Pointe Diable, BP70, Plouzane, France.
   Univ Genoa, DISTAV, Corso Europa 26, I-16132 Genoa, Italy.
C2 IFREMER, FRANCE
   ISMAR, ITALY
   UNIV NICE, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   UNIV GENOA, ITALY
SI BREST
SE PDG-REM-GM-LAD
   PDG-ODE-LOPS-OC
   PDG-ODE-DYNECO-DHYSED
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
IF 3.281
TC 14
UR https://archimer.ifremer.fr/doc/00378/48977/49394.pdf
LA English
DT Article
CR MALISAR/1
   MALISAR/2
   MALISAR/3
   PRISME 2
   PRISME 3
BO Le Suroît
   L'Atalante
   Pourquoi pas ?
DE ;Sediment drift;Circulation model;Bottom current velocity;Levantine Intermediate Water;Submarine landslide;Mediterranean
AB A brief review of the published evidence of current deposits around Italy is the occasion to test the robustness of matching bottom current velocity models and seafloor morphologies to identify contourite drifts not yet documented. We present the result of the regional hydrodynamic model MARS3D in the Northern Tyrrhenian and Ligurian Sea with horizontal resolution of 1.2 km and 60 levels with focus on bottom current: data are integrated over summer and winter 2013 as representative of low and high intensity current conditions. The Eastern Ligurian margin is impacted by the Levantine Intermediate Water (LIW) with modeled mean velocity of bottom current up to 20 cm s−1 in winter 2013 and calculated bottom shear stress exceeding 0.2 N m−2 in water depth of 400–800 m. By crossing this information with seafloor morphology and geometry of seismic reflections, we identify a sediment drift formerly overlooked at ca 1000 m water depth. The Portofino separated mounded drift has a maximum thickness of at least 150 m and occurs in an area of mean current velocity minimum. Independent evidence to support the interpretation include bottom current modelling, seafloor morphology, seismic reflection geometry and sediment core facies. The adjacent areas impacted by stronger bottom currents present features likely resulted from bottom current erosion such as a marine terrace and elongated pockmarks. Compared to former interpretation of seafloor morphology in the study area, our results have an impact on the assessment of marine geohazards: submarine landslides offshore Portofino are small in size and coexist with sediment erosion and preferential accumulation features (sediment drifts) originated by current-dominated sedimentary processes. Furthermore, our results propel a more general discussion about contourite identification in the Italian seas and possible implications. 
PY 2017
PD NOV
SO Marine And Petroleum Geology
SN 0264-8172
PU Elsevier Sci Ltd
VL 87
UT 000411419400012
BP 137
EP 147
DI 10.1016/j.marpetgeo.2017.03.026
ID 48977
ER

EF