Show simple item record

dc.contributor.authorWhite, LF
dc.contributor.authorBailey, I
dc.contributor.authorFoster, GL
dc.contributor.authorAllen, G
dc.contributor.authorKelley, SP
dc.contributor.authorAndrews, JT
dc.contributor.authorHogan, K
dc.contributor.authorDowdeswell, JA
dc.contributor.authorStorey, CD
dc.date.accessioned2015-11-16T08:52:47Z
dc.date.issued2015-11-12
dc.description.abstractThe 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 40Ar/39Ar 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 40Ar/39Ar ages of individual sand-sized grains of feldspars and hornblendes, respectively, from modern Greenland glacifluvial and fjord 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.en_GB
dc.description.sponsorshipNERCen_GB
dc.description.sponsorshipNational Science Foundationen_GB
dc.identifier.citationVol. 433, 1 January 2016, pp. 192–203en_GB
dc.identifier.doihttp://dx.doi.org/10.1016/j.epsl.2015.10.054
dc.identifier.grantnumberNE/H014187/1en_GB
dc.identifier.grantnumberJR51-GC28en_GB
dc.identifier.grantnumberJR106-GC06en_GB
dc.identifier.grantnumberGST/02/2198en_GB
dc.identifier.grantnumberNER/T/S/2000/00986en_GB
dc.identifier.urihttp://hdl.handle.net/10871/18656
dc.language.isoenen_GB
dc.publisherElsevieren_GB
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0012821X15006901en_GB
dc.rightsCopyright © 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).en_GB
dc.subjectGreenlanden_GB
dc.subjectice rafted debrisen_GB
dc.subjectAr–Aren_GB
dc.subjectPb isotopesen_GB
dc.subjecticebergsen_GB
dc.subjectprovenanceen_GB
dc.titleTracking 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 hornblendesen_GB
dc.typeArticleen_GB
dc.date.available2015-11-16T08:52:47Z
dc.identifier.issn0012-821X
dc.descriptionArticleen_GB
dc.identifier.journalEarth and Planetary Science Lettersen_GB


Files in this item

This item appears in the following Collection(s)

Show simple item record