FN Archimer Export Format
PT J
TI Multiscale spatio-temporal variability of sedimentary deposits in the Var turbidite system (North-Western Mediterranean Sea)
BT 
AF MAS, Virginie
   MULDER, T.
   DENNIELOU, Bernard
   SCHMIDT, S.
   KHRIPOUNOFF, Alexis
   SAVOYE, Bruno
AS 1:1,2;2:2;3:1;4:2;5:3;6:1;
FF 1:;2:;3:;4:;5:;6:;
C1 IFREMER, Dept Geosci Marines, F-29280 Plouzane, France.
   Univ Bordeaux 1, CNRS, UMR 5805 EPOC, F-33405 Talence, France.
   IFREMER, Dept Ecosyst & Environn Profonds, F-29280 Plouzane, France.
C2 IFREMER, FRANCE
   UNIV BORDEAUX, FRANCE
   IFREMER, FRANCE
SI BREST
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.517
TC 21
TU Centre national de la recherche scientifique
   Université de Bordeaux
   École pratique des hautes études
UR https://archimer.ifremer.fr/doc/00013/12458/11862.pdf
LA English
DT Article
CR ENVAR1
   ENVAR2
   ENVAR3
   ENVAR4
   ENVAR5
   ENVAR6
   ESS300/1
   GMO1
   SAME 1 ET 2
BO Unknown
   Téthys II
   Le Suroît
DE ;Var;France;gravity processes;Mediterranean;turbidity current;hyperpycnal;flood
AB The Var turbidite system is a small sandy system located in the Ligurian Basin (Mediterranean Sea). It is active during present sea-level highstand and shows four types of sediment transfer processes: (1) low-density turbidity surges generated by small-scale failures (2) low-magnitude, high-frequency (yearly) hyperpycnal turbid plumes, (3) high-magnitude, less-frequent, hyperpycnal currents and (4) high-magnitude flows generated by large slope failures. These processes have different imprints on the morphology of the system. Inversely, the topography plays a role on the behaviour of these flows. The depositional and erosional architecture of the system has been investigated in detail on the basis of SAR imagery and a set of cores using an interface corer collected repetitively from a dense group of sites. The inner terraces located in the upper part of the turbidite system are generally depositional and thus provide a detailed record of recent sediment transfer processes. But the lower the elevation, the more terraces are affected by turbulent flow erosion. Downward, the channel-floor is a complex area where flows mainly bypass but locally erode or deposit. The levee is dominantly depositional, but only records high-magnitude events, able to spill over. Low-magnitude, high-frequency events, such as yearly hyperpycnal currents are confined in the upper part of the system and thus have little control on system architecture. Moreover, they provide only thin deposits that can be misinterpreted in terms of involved process, and will probably be erased from the geological record. High-magnitude events have strong control on the system architecture as they erode the channel-floor and participate in the construction of the Var Sedimentary Ridge.
PY 2010
PD SEP
SO Marine Geology
SN 0025-3227
PU Elsevier Science Bv
VL 275
IS 1-4
UT 000281217300003
BP 37
EP 52
DI 10.1016/j.margeo.2010.04.006
ID 12458
ER

EF