FN Archimer Export Format
PT J
TI Neodymium isotopic composition and rare earth element concentrations in the deep and intermediate Nordic Seas: Constraints on the Iceland Scotland Overflow Water signature
BT 
AF LACAN, F
   JEANDEL, C
AS 1:1;2:1;
FF 1:;2:;
C1 LEGOS, Observatoire Midi Pyrénées, Toulouse, France
C2 LEGOS, FRANCE
IF 2.57
TC 87
UR https://archimer.ifremer.fr/doc/00228/33924/32308.pdf
LA English
DT Article
CR IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
BO Marion Dufresne
DE ;Iceland Scotland Overflow Water;neodymium isotopic composition;Nordic Seas;North Atlantic;rare earth;sediment water mass interactions;paleoceanography;water masses;geochemistry
AB Neodymium isotopic composition and rare earth element concentrations were measured in seawater samples from eleven stations in the Nordic Seas. These data allow us to study how the Iceland Scotland Overflow Water ( ISOW) acquires its neodymium signature in the modern ocean. The waters overflowing the Faroe Shetland channel are characterized by epsilon(Nd) = -8.2 +/- 0.6, in good agreement with the only other data point, published 19 years ago. In the Greenland and Iceland Seas the water masses leading to the formation of the ISOW display lower neodymium isotopic composition, with epsilon(Nd) around -11 and -9, respectively. Since no water masses in the Nordic Seas are characterized by epsilon(Nd) > -8, the radiogenic signature of the ISOW likely reflects inputs from the highly radiogenic Norwegian Basin basaltic margins ( Jan-Mayen, Iceland, Faroe, with epsilon(Nd) approximate to + 7). In addition to the neodymium isotopic composition, the rare earth element patterns suggest that these inputs occur via the remobilization ( which includes resuspension and dissolution) of sediments deposited on the margins. Whereas the neodymium isotopic composition behaves conservatively in the oceans in the absence of lithogenic inputs, and can be used as a water mass tracer, these results emphasize the role of interactions, between sediments deposited on margins and seawater, in the acquisition of the neodymium isotopic composition of water masses. These results should allow a better use of this parameter to trace the present and the past circulation in the North Atlantic.
PY 2004
PD NOV
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU Amer Geophysical Union
VL 5
IS 11
UT 000225030300004
BP 1
EP 10
DI 10.1029/2004GC000742
ID 33924
ER

EF