FN Archimer Export Format
PT J
TI Holocene ice-rafting and sediment transport from the glaciated margin of East Greenland (67-70 degrees N) to the N Iceland shelves: detecting and modelling changing sediment sources
BT 
AF ANDREWS, John T.
   BIGG, Grant R.
   WILTON, David J.
AS 1:1,2;2:3;3:3;
FF 1:;2:;3:;
C1 Univ Colorado, INSTAAR, Boulder, CO 80309 USA.
   Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA.
   Univ Sheffield, Dept Geog, Sheffield S10 2TN, S Yorkshire, England.
C2 UNIV COLORADO BOULDER, USA
   UNIV COLORADO BOULDER, USA
   UNIV SHEFFIELD, UK
IF 4.572
TC 30
UR https://archimer.ifremer.fr/doc/00290/40150/39091.pdf
   https://archimer.ifremer.fr/doc/00290/40150/39092.xlsx
LA English
DT Article
CR IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
BO Marion Dufresne
DE ;Holocene;Ice-rafting;Ice bergs;East Greenland;Iceland
AB We examine variations in the ice-rafted sources for sediments in the Iceland/East Greenland offshore marine archives by utilizing a sediment unmixing model and link the results to a coupled iceberg-ocean model. Surface samples from around Iceland and along the E/NE Greenland shelf are used to define potential sediment sources, and these are examined within the context of the down-core variations in mineralogy in the <2 mm sediment fraction from a transect of cores across Denmark Strait. A sediment unmixing model is used to estimate the fraction of sediment <2 mm off NW and N Iceland exported across Denmark Strait; this averaged between 10 and 20%. Both the sediment unmixing model and the coupled iceberg-ocean model are consistent in finding that the fraction of "far-travelled" sediments in the Denmark Strait environs is overwhelmingly of local, mid-East Greenland, provenance, and therefore with a significant cross-channel component to their travel. The Holocene record of ice-rafted sediments denotes a three-part division of the Holocene in terms of iceberg sediment transport with a notable increase in the process starting ca 4000 cal yr BP. This latter increase may represent the re-advance during the Neoglacial period of land-terminating glaciers on the Geikie Plateau to become marine-terminating. The contrast in spectral signals between these cores and the 1500-yr cycle at VM28-14, just south of the Denmark Strait, combined with the coupled iceberg-model results, leads us to speculate that the signal at VM28-14 reflects pulses in overflow waters, rather than an ice-rafted signal.
PY 2014
PD MAY
SO Quaternary Science Reviews
SN 0277-3791
PU Pergamon-elsevier Science Ltd
VL 91
UT 000336819800014
BP 204
EP 217
DI 10.1016/j.quascirev.2013.08.019
ID 40150
ER

EF