FN Archimer Export Format
PT J
TI Tracking the provenance of Greenland-sourced, Holocene aged, individual sand-sized ice-rafted debris using the Pb-isotope compositions of feldspars and 40Ar/39Ar ages of hornblendes
BT 
AF WHITE, Lee F.
   BAILEY, Ian
   FOSTER, Gavin L.
   ALLEN, Georgina
   KELLEY, Simon P.
   ANDREWS, John T.
   HOGAN, Kelly
   DOWDESWELL, Julian A.
   STOREY, Craig D.
AS 1:1;2:2;3:2;4:2;5:3;6:4,5;7:6;8:6;9:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 Univ Portsmouth, Sch Earth & Environm Sci, Portsmouth PO1 3QL, Hants, England.
   Univ Southampton, Natl Oceanog Ctr Southampton, Ocean & Earth Sci, Southampton SO14 3ZH, Hants, England.
   Open Univ, Dept Environm Earth & Ecosyst, Milton Keynes MK7 6AA, Bucks, England.
   Univ Colorado, INSTAAR, Boulder, CO 80309 USA.
   Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA.
   Univ Cambridge, Scott Polar Res Inst, Cambridge CB2 1ER, England.
C2 UNIV PORTSMOUTH, ENGLAND
   UNIV SOUTHAMPTON, ENGLAND
   UNIV OPEN, ENGLAND
   UNIV COLORADO, USA
   UNIV COLORADO, USA
   UNIV CAMBRIDGE, ENGLAND
IF 4.409
TC 28
UR https://archimer.ifremer.fr/doc/00421/53292/54130.pdf
   https://archimer.ifremer.fr/doc/00421/53292/54131.pdf
   https://archimer.ifremer.fr/doc/00421/53292/54132.xlsx
LA English
DT Article
CR IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
BO Marion Dufresne
DE ;Greenland;ice rafted debris;Ar-Ar;Pb isotopes;icebergs;provenance
AB The provenance of sand-sized ice-rafted debris (IRD) sourced from Greenland is currently difficult to determine. Such knowledge, if it could be ascertained with a high degree of certainty, could be applied to the Greenland-proximal marine records to improve both our understanding of modern-day spatial patterns of iceberg rafting and the past history of the Greenland Ice Sheet (GIS). Recent studies have highlighted the utility of the Pb-isotope composition of individual sand-sized feldspars and the Ar-40/Ar-39 ages of individual sand-sized hornblendes in this regard. However, before any such provenance toolkit can be applied to the palaeo-record, it is necessary first to determine whether this approach can be used to track the sources of known recent Greenland-proximal IRD deposition. To this end we present new records of the Pb-isotope composition and the Ar-40/Ar-39 ages of individual sand-sized grains of feldspars and homblendes, respectively, from modern Greenland glacifluvial and ford sands and Holocene to modern Greenland-proximal marine sediments. These new data demonstrate that sand-sized feldspars and hornblendes glacially eroded by the GIS exhibit distinct intra- and inter-tectonic terrane differences in their Pb-isotope compositions and ages and that these differences are clearly expressed in the geochemistry and geochronology of sand-sized IRD deposited in marine sediments around Greenland. Although overlap exists between some Greenland-proximal IRD 'source fields' defined by these data, our approach has the potential to both better understand spatial patterns of Greenland-derived IRD in the modern day as well as during past episodes of iceberg calving. 
PY 2016
PD JAN
SO Earth And Planetary Science Letters
SN 0012-821X
PU Elsevier Science Bv
VL 433
UT 000367120300020
BP 192
EP 203
DI 10.1016/j.epsl.2015.10.054
ID 53292
ER

EF