FN Archimer Export Format
PT J
TI Paleointensity-assisted chronostratigraphy of detrital layers on the Eirik Drift (North Atlantic) since marine isotope stage 11
BT 
AF EVANS, Helen F.
   CHANNELL, James E. T.
   STONER, Joseph S.
   HILLAIRE-MARCEL, Claude
   WRIGHT, James D.
   NEITZKE, Lauren C.
   MOUNTAIN, Gregory S.
AS 1:1;2:1;3:2;4:3;5:4;6:4;7:4;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Univ Florida, Dept Geol Sci, Gainesville, FL 32611 USA.
   Oregon State Univ, COAS, Corvallis, OR 97331 USA.
   Univ Quebec, Ctr Rech Geochim & Geodynam GEOTOP, Montreal, PQ H3C 3P8, Canada.
   Rutgers State Univ, Dept Geol Sci, Wright Labs, Piscataway, NJ 08854 USA.
C2 UNIV FLORIDA, USA
   UNIV OREGON STATE, USA
   UNIV QUEBEC (UQAM-GEOTOP), CANADA
   UNIV RUTGERS STATE, USA
IF 2.354
TC 33
UR https://archimer.ifremer.fr/doc/00235/34625/32978.pdf
LA English
DT Article
CR IMAGES 1-MD101
   IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
BO Marion Dufresne
DE ;paleointensity
AB Four piston cores collected in 1999 and 2002 from the Eirik Drift (southern Labrador Sea, off SE Greenland) provide paleomagnetic, environmental magnetic, and oxygen isotope records back to marine isotope stage 11. Age models for the cores are based on a combination of planktonic oxygen isotope data, relative geomagnetic paleointensity proxies, and the identification of geomagnetic excursions (Laschamp and Iceland Basin). Environmental magnetic data delineate two distinct detrital signals, interpreted to reflect the behavior of the surrounding ice sheets (Greenland and Laurentide) to orbital-and millennial-scale climate forcing. Broad decimeter-scale intervals of increased magnetic concentration and grain size occur during the early part of interglacial marine isotopic stages (MIS) 1, 5, 7, 9, and 11. Discrete centimeter-scale layers, recognized by magnetic concentration and grain-size sensitive parameters, gamma ray attenuation (GRA) bulk density, and carbonate content, are observed in glacial and interglacial stages as well as during terminations. On the basis of glacial reconstructions on Greenland during the last termination, the broad decimeter-scale coarser-grained intervals can be attributed to detrital influx associated with the retreat of the terrestrial-based Greenland Ice Sheet in the early Holocene. A similar magnetic signal observed within interglacial MIS 5, 7, 9, and 11 indicates similar Greenland Ice Sheet behavior during these time intervals. Two types of centimeter-scale detrital layers are also recognized back to MIS 11. Detrital carbonate (DC) layers reflect predominately ice-rafted debris (IRD) deposition, while the low detrital carbonate (LDC) layers reflect mass movement as evidenced by sharp basal contacts, graded bedding, and traction structures, likely from the Greenland slope. Some detrital layers on Eirik Drift, particularly the DC layers, can be tentatively correlated to detrital layers observed in the central North Atlantic and to those documented on the southern side of the Labrador Sea at Orphan Knoll.
PY 2007
PD NOV
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU Amer Geophysical Union
VL 8
IS 11
UT 000251256400002
BP 1
EP 23
DI 10.1029/2007GC001720
ID 34625
ER

EF