FN Archimer Export Format
PT J
TI Morphological and Stratigraphic Investigation of a Holocene Subaqueous Shelf Fan, North of the Istanbul Strait in the Black Sea
BT 
AF OKAY, Seda
   JUPINET, Benoit
   LERICOLAIS, Gilles
   CIFCI, Gunay
   MORIGI, Catherina
AS 1:1;2:2;3:3;4:1;5:4;
FF 1:;2:;3:PDG-REM-GM-LES;4:;5:;
C1 Dokuz Eylul Univ, Inst Marine Sci & Technol, TR-35340 Izmir, Turkey.
   IUEM, UBO, CNRS, UMR 6538, F-29280 Plouzane, France.
   IFREMER, Ctr Brest, DCB GM, F-29280 Plouzane, France.
   Geol Survey Denmark & Greenland GEUS, Copenhagen, Denmark.
C2 UNIV DOKUZ EYLUL, TURKEY
   UBO, FRANCE
   IFREMER, FRANCE
   GEUS, DENMARK
SI BREST
SE PDG-REM-GM-LES
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 0.985
TC 13
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 Bretagne Occidentale
   Université de Bretagne-Sud
UR https://archimer.ifremer.fr/doc/00036/14676/13677.pdf
LA English
DT Article
CR BLASON 2
   MD 139 / ASSEMBLAGE - 1
BO Le Suroît
   Marion Dufresne
DE ;multibeam;high resolution seismic;sea level change;high energy Mediterranean water input;subaqueous fan
AB In 2002, the Bosphorus outlet was mapped using an EM 300 multibeam echo-sounder together with a Chirp sonar system. This survey, carried out on board the Ifremer RV 'Le Suroit' in the frame of the BlaSON project, completes the data previously acquired directly at the mouth of the Bosphorus by Di Iorio et al. (1999) in the frame of a NATO SACLANT Undersea Research project using jointly the NATO RV Alliance, and the Turkish Navy Survey ship 'Cubuklu'. This acoustic imaging has identified a canyon system at the slope and a shallow marine fan, which contains shelf incisions extending the Istanbul Strait incision. Multibeam bathymetry, ultra-high resolution seismic profiling and coring correlations on this subaqueous fan area allowed reconstruction of morphology and patterns of sediment distribution indicative of high energy sediment transport processes. The discovery of a shallow water/shelf type fan directly off shore from the Bosphorus and connected to its outlet is consistent with the theories of sudden discharges of large volumes of water. Age dating obtained at the bottom of this subaqueous shelf fan yielded an age of 6700 yr C-14 BP (uncorrected age) for the first marine mollusc encountered at the base. This is in accordance with a last and abrupt reconnection of the Marmara Sea to the Black Sea. A detailed morphological map of the shelf and slope along with seismic profile interpretation and core correlation is presented here. A synthesis is proposed to explain the formation of this subaqueous fan and its relationship with the last connection between Black and Marmara seas aft er the Last Glacial Maximum. This interpretation can be summarized as follows: stage A corresponds to the first erosion surface seen on the shelf related to the Last Glacial Maximum low stand; stage B is the ravine surface onlapping to ca. -30, -40 m; stage C is a second erosional surface related to a sea level fall and eroding most of underlying Unit 1B; and stage D corresponds to the onset of the fan deposit during a period of high water run-off from the Black Sea entering from the Bosphorus. Avulsion branches show that this fan has been active for a long time.
PY 2011
SO Turkish Journal Of Earth Sciences
SN 1300-0985
PU Scientific Technical Research Council Turkey-tubitak
VL 20
IS 3
UT 000290265400003
BP 287
EP 305
ID 14676
ER

EF