FN Archimer Export Format
PT J
TI Magnetic signature of European margin sediments: Provenance of ice-rafted debris and the climatic response of the British ice sheet during Marine Isotope Stages 2 and 3
BT 
AF PETERS, Clare
   WALDEN, John
   AUSTIN, William E. N.
AS 1:1;2:1;3:1;
FF 1:;2:;3:;
C1 Univ St Andrews, Sch Geog & Geophys, Environm Change Res Grp, St Andrews KY16 9AL, Fife, Scotland.
C2 UNIV ST ANDREWS, UK
IF 3.412
TC 22
UR https://archimer.ifremer.fr/doc/00237/34823/33305.pdf
LA English
DT Article
CR IMAGES 1-MD101
BO Marion Dufresne
AB Mineral magnetic measurements are used to distinguish ice-rafted debris (IRD) sources and climate cycles spanning Marine Isotope Stage (MIS) 3 and MIS2 in core MD95-2006, from the Barra Fan, NE Atlantic. Distinct magnetic properties are displayed by IRD from the Laurentide ice sheet (LIS) (high susceptibility (chi), low isothermal remanent magnetization (IRM), low coercivity and the Verwey transition), the British ice sheet (BIS) (high chi, high IRM, medium coercivity and suppressed Verwey transition) and the ambient background sediment (low chi and low IRM). A magnetic unmixing model quantifies proportions of the IRD sources during Greenland Stadial (GS) 16 to GS3 (57.3 to 22.6 ka B. P.) spanning Heinrich Event (H) 5 to H2. The magnetic model suggests LIS IRD is only dominant within an interval during GS9, assigned to H4. Prior to H4 low proportions of BIS IRD suggest the BIS was not able to deliver significant amounts of IRD into the marine system. Following H4, proportions of BIS IRD during stadials increase, suggesting growth of the BIS during the latter stages of MIS3, with further expansion of the BIS during MIS2. LIS IRD within H2 is masked by BIS IRD input. Climatically driven anhysteretic remanent magnetizations reflect the short Dansgaard-Oeschger cycles between H5 and H4, while the proportions of hard magnetic minerals reflect the longer-term Bond cycles.
PY 2008
PD JUN
SO Journal Of Geophysical Research-earth Surface
SN 2169-9003
PU Amer Geophysical Union
VL 113
IS F03007
UT 000257999400001
BP 1
EP 16
DI 10.1029/2007JF000836
ID 34823
ER

EF