FN Archimer Export Format
PT J
TI The Ponto-Caspian basin as a final trap for southeastern Scandinavian Ice-Sheet meltwater
BT 
AF TUDRYN, Alina
   LEROY, Suzanne A. G.
   TOUCANNE, Samuel
   GIBERT-BRUNET, Elisabeth
   TUCHOLKA, Piotr
   LAVRUSHIN, Yuri A.
   DUFAURE, Olivier
   MISKA, Serge
   BAYON, Germain
AS 1:1;2:2;3:3;4:1;5:1;6:4;7:1;8:1;9:3;
FF 1:;2:;3:PDG-REM-GM-LGS;4:;5:;6:;7:;8:;9:PDG-REM-GM-LGS;
C1 Univ Paris 11, CNRS, Univ Paris Saclay, GEOPS, Rue Belvedere,Bat 504-509, F-91405 Orsay, France.
   Brunel Univ London, Environm Sci, London UB8 3PH, England.
   IFREMER, Unite Rech Geosci Marines, F-29280 Plouzane, France.
   Russian Acad Sci, Geol Inst GIN, Pyzhevskii 7, Moscow 117036, Russia.
C2 UNIV PARIS 11, FRANCE
   UNIV LONDON, UK
   IFREMER, FRANCE
   RUSSIAN ACAD SCI, RUSSIA
SI BREST
SE PDG-REM-GM-LGS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 4.797
TC 47
UR https://archimer.ifremer.fr/doc/00345/45605/45225.pdf
LA English
DT Article
CR BLASON
   MD 139 / ASSEMBLAGE - 1
BO Le Suroît
   Marion Dufresne
DE ;Caspian sea;Black sea;SIS deglaciation;Early Khvalynian transgression;Chocolate clays;Red layers;Clay minerals;Neodymium isotopes;Pollen;Late Pleistocene
AB This paper provides new data on the evolution of the Caspian Sea and Black Sea from the Last Glacial Maximum until ca. 12 cal kyr BP. We present new analyses (clay mineralogy, grain-size, Nd isotopes and pollen) applied to sediments from the river terraces in the lower Volga, from the middle Caspian Sea and from the western part of the Black Sea. The results show that during the last deglaciation, the Ponto-Caspian basin collected meltwater and fine-grained sediment from the southern margin of the Scandinavian Ice Sheet (SIS) via the Dniepr and Volga Rivers. It induced the deposition of characteristic red-brownish/chocolate-coloured illite-rich sediments (Red Layers in the Black Sea and Chocolate Clays in the Caspian Sea) that originated from the Baltic Shield area according to Nd data. This general evolution, common to both seas was nevertheless differentiated over time due to the specificities of their catchment areas and due to the movement of the southern margin of the SIS. Our results indicate that in the eastern part of the East European Plain, the meltwater from the SIS margin supplied the Caspian Sea during the deglaciation until ∼13.8 cal kyr BP, and possibly from the LGM. That led to the Early Khvalynian transgressive stage(s) and Chocolate Clays deposition in the now-emerged northern flat part of the Caspian Sea (river terraces in the modern lower Volga) and in its middle basin. In the western part of the East European Plain, our results confirm the release of meltwater from the SIS margin into the Black Sea that occurred between 17.2 and 15.7 cal kyr BP, as previously proposed. Indeed, recent findings concerning the evolution of the southern margin of the SIS and the Black Sea, show that during the last deglaciation, occurred a westward release of meltwater into the North Atlantic (between ca. 20 and 16.7 cal kyr BP), and a southward one into the Black Sea (between 17.2 and 15.7 cal kyr BP). After the Red Layers/Chocolate Clays deposition in both seas and until 12 cal kyr BP, smectite became the dominant clay mineral. The East European Plain is clearly identified as the source for smectite in the Caspian Sea sediments. In the Black Sea, smectite originated either from the East European Plain or from the Danube River catchment. Previous studies consider smectite as being only of Anatolian origin. However, our results highlight both, the European source for smectite and the impact of this source on the depositional environment of the Black Sea during considered period.
PY 2016
PD SEP
SO Quaternary Science Reviews
SN 0277-3791
PU Pergamon-elsevier Science Ltd
VL 148
UT 000383313100003
BP 29
EP 43
DI 10.1016/j.quascirev.2016.06.019
ID 45605
ER

EF