FN Archimer Export Format
PT J
TI Messinian event in the black sea: Evidence of a Messinian erosional surface
BT 
AF GILLET, Herve
   LERICOLAIS, Gilles
   REHAULT, Jean Pierre
AS 1:1,3;2:2;3:3;
FF 1:;2:PDG-DOP-DCB-GM-LES;3:;
C1 Univ Bordeaux 1, CNRS, EPOC, UMR 5805, F-33405 Talence, France.
   IFREMER, Ctr Brest, DRO GM, F-29280 Plouzane, France.
   IUEM, CNRS, UMR 6538, UBO, F-29280 Plouzane, France.
C2 UNIV BORDEAUX, FRANCE
   IFREMER, FRANCE
   IUEM, FRANCE
SI BREST
SE PDG-DOP-DCB-GM-LES
   PDG-DOP-DCB-GM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.975
TC 69
TU Centre national de la recherche scientifique
   Institut de recherche pour le développement
   Institut français de recherche pour l'exploitation de la mer
   Service Hydrographique et Océanographique de la Marine
   Université de Bordeaux
   Université de Bretagne Occidentale
   Université de Bretagne-Sud
   École pratique des hautes études
UR https://archimer.ifremer.fr/doc/2007/publication-3324.pdf
LA English
DT Article
CR BLASON
   BLASON 2
   MD 139 / ASSEMBLAGE - 1
BO Le Suroît
   Marion Dufresne
DE ;Messinian salinity crisis;Seismic stratigraphy;Messinian erosional surface;Black Sea
AB In 1975, sediment cores from leg DSDP 42b (sites 380A and 381) revealed a thin sediment layer in the Black Sea basin which points to a shallow water environment at the Miocene-Pliocene boundary. With these facts and in the wake of hypothesis of the Messinian Salinity Crisis (MSC), it was proposed that the Black Sea, like the Mediterranean Sea, suffered a desiccation period at the end of the Messinian (Hsu, K.J. and Giovanoli, F., 1979. Messinian event in the Black Sea. Palaeogeography, Palaeoclimatology, Palaeoecology, 29: 75-93). Whereas the main topics of the MSC in the Mediterranean Sea is now widely accepted, the lack of evidence for a Messinian erosional surface in the Black Sea left the debate about the Messinian desiccation of this basin open until today. The analysis of high resolution multi-channel seismic data acquired during the BlaSON surveys brings important new elements for this scientific debate: (1) Down the slope offshore the Bosporus, we show a clear erosional surface correlated to the top of the Upper Miocene shallow water environment unit of site DSDP 381. The overlying Lower Zanclean unit inevitably dates this erosional surface of the Messinian event. (2) A wide intra-Pontian erosional surface (IPU) is evidenced on the Romanian shelf The IPU is characterized by a sharp decrease in the incision rate from outer (deep canyons) to inner shelf (superficial incisions network). According to the most recent Paratethyan and Mediterranean stratigraphic scale correlations, the IPU erosional surface is considered as the analogue to the Messinian erosional surface described down the slope offshore the Bosporus. In addition to recently discovered inland erosional signature, the wide regional erosional surface we underline on the Western Black Sea margins validates the Black Sea Messinian desiccation hypothesis. We also demonstrate that evaporative draw-down of the Black Sea implied the installation in the basin of a negative hydrologic budget during the Messinian. The lack of a major Messinian Danube canyon on the Romanian shelf supports the hypothesis of a Messinian Danube trapped in the Dacic basin. However, the presence of a Messinian superficial incision network connecting the location of the modem Danube delta to deeply incised Messinian canyons on the outer shelf (IPU) makes the hypothesis of a Danube reaching the partially desiccated Black Sea still possible.
PY 2007
PD OCT
SO Marine Geology
SN 0025-3227
PU Elsevier
VL 244
IS 1-4
UT 000250150800009
BP 142
EP 165
DI 10.1016/j.margeo.2007.06.004
ID 3324
ER

EF