FN Archimer Export Format
PT J
TI A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka
BT 
AF Rutledal, Sunniva
   Haflidason, Hafkidi
   Berben, Sarah MP
   Griem, Lisa
   Jansen, Eystein
AS 1:1;2:1;3:1;4:1;5:1,2;
FF 1:;2:;3:;4:;5:;
C1 Department of Earth Science, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway
   Norwegian Research Centre (NORCE), Bergen and Bjerknes Centre for Climate Research, Bergen, Norway
C2 UNIV BERGEN, NORWAY
   UNIV BERGEN, NORWAY
IF 2.738
TC 0
UR https://archimer.ifremer.fr/doc/00648/76044/76980.pdf
   https://archimer.ifremer.fr/doc/00648/76044/76981.png
   https://archimer.ifremer.fr/doc/00648/76044/76982.png
   https://archimer.ifremer.fr/doc/00648/76044/76983.xlsx
   https://archimer.ifremer.fr/doc/00648/76044/76984.docx
LA English
DT Article
CR IMAGES 1-MD101
   IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   MD 141 / ALIENOR 1
BO Marion Dufresne
DE ;marine tephra;North Atlantic;Quaternary;tephra isochrons;tephrochronology
AB Volcanic ash preserved in marine sediment sequences is key for independent synchronization of palaeoclimate records within and across different climate archives. Here we present a continuous tephrostratigraphic record from the Labrador Sea, spanning the last 65.5 ka, an area and time period that has not been investigated in detail within the established North Atlantic tephra framework. We investigated marine sediment core GS16]204] 22CC for increased tephra occurrences and geochemically analysed the major element composition of tephra shards to identify their source volcano(es). In total we observed eight tephra zones, of which five concentration peaks show isochronous features that can be used as independent tie]points in future studies. The main transport mechanism of tephra shards to the site was near]instantaneous deposition by drifting of sea ice along the East Greenland Current. Our results show that the Icelandic Veidivotn volcanic system was the dominant source of tephra material, especially between late Marine Isotope Stage (MIS) 4 and early MIS 3. The Veidivotn system generated volcanic eruptions in cycles of ca. 3.5 ka. We speculate that the quantity of tephra delivered to the Labrador Sea was a result of variable Icelandic ice volume and/or changes in the transportation pathway towards the Labrador Sea. 
PY 2020
PD OCT
SO Journal Of Quaternary Science
SN 0267-8179
PU Wiley / Blackwell
VL 35
IS 7
UT 000567988900001
BP 855
EP 868
DI 10.1002/jqs.3241
ID 76044
ER

EF