FN Archimer Export Format
PT J
TI Evidence for pre-Messinian submarine canyons on the Gulf of Lions slope (Western Mediterranean)
BT 
AF LOFI, J
   BERNE, Serge
AS 1:1;2:2,3;
FF 1:;2:PDG-DOP-DCB-GM-LES;
C1 Univ Montpellier, Geosci Montpellier, F-34095 Montpellier 05, France.
   IFREMER, F-29280 Plouzane, France.
   Univ Perpignan, F-66860 Perpignan, France.
C2 UNIV MONTPELLIER, FRANCE
   IFREMER, FRANCE
   UNIV PERPIGNAN, FRANCE
SI BREST
SE PDG-DOP-DCB-GM-LES
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.358
TC 28
UR https://archimer.ifremer.fr/doc/2008/publication-4779.pdf
LA English
DT Article
DE ;Messinian salinity crisis;Passive margin;Miocene/Pliocene;Submarine canyon
AB On the Gulf of Lions margin, the Messinian Salinity Crisis (MSC) event led to a significant and widespread erosion of the Miocene shelf and slope. It is thus difficult nowadays to restore the morphology of the margin at the beginning of the crisis, and to study the Middle-Upper Miocene series rarely preserved from erosion. In this study, thanks to the use of multichannel seismic reflection data from the Gulf of Lions western slope, it has been possible to image the Miocene slope deposits. Interpretation of the data reveals several diachronic sediment bodies just beneath the Miocene/Pliocene boundary. These bodies are related to slope erosional-depositional complexes, underlain by erosional unconformities outlined by seismic reflector truncations. They are V- or U-shaped in cross section. Over their mapped extent, these bodies are typically 8-12 km wide and incise up to 600 ms TWTT into the Miocene slope deposits. in plan view, they are roughly elongated NW-SE, perpendicularly to the present day shelf break, and they progressively migrate towards the South-East. We interpret these seismic bodies as buried Miocene submarine canyons pre-dating the dramatic drawdown related to the MSC. In this study we try to constrain their age, and we discuss the events that may be at their origin. We also discuss the long-term impact of these slope canyons on the evolution of the margin. (C) 2008 Elsevier Ltd. All rights reserved.
PY 2008
PD SEP
SO Marine and Petroleum Geology
SN 0264-8172
PU Elsevier
VL 25
IS 8
UT 000260641500012
BP 804
EP 817
DI 10.1016/j.marpetgeo.2008.04.006
ID 4779
ER

EF