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
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 spati...
Published in: | Earth and Planetary Science Letters |
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Language: | English |
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Online Access: | https://doi.org/10.1016/j.epsl.2015.10.054 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 |
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fttriple:oai:gotriple.eu:10670/1.dmqdxd 2023-05-15T16:23:27+02:00 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 White, Lee F. Bailey, Ian Foster, Gavin L. Allen, Georgina Kelley, Simon P. Andrews, John T. Hogan, Kelly Dowdeswell, Julian A. Storey, Craig D. https://doi.org/10.1016/j.epsl.2015.10.054 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 en eng Elsevier Science Bv doi:10.1016/j.epsl.2015.10.054 10670/1.dmqdxd 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 Archimer, archive institutionnelle de l'Ifremer Earth And Planetary Science Letters (0012-821X) (Elsevier Science Bv), 2016-01 , Vol. 433 , P. 192-203 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1016/j.epsl.2015.10.054 2023-01-22T18:33:11Z 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. Text Greenland Ice Sheet Unknown Greenland Earth and Planetary Science Letters 433 192 203 |
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language |
English |
topic |
geo envir |
spellingShingle |
geo envir White, Lee F. Bailey, Ian Foster, Gavin L. Allen, Georgina Kelley, Simon P. Andrews, John T. Hogan, Kelly Dowdeswell, Julian A. Storey, Craig D. 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 |
topic_facet |
geo envir |
description |
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. |
format |
Text |
author |
White, Lee F. Bailey, Ian Foster, Gavin L. Allen, Georgina Kelley, Simon P. Andrews, John T. Hogan, Kelly Dowdeswell, Julian A. Storey, Craig D. |
author_facet |
White, Lee F. Bailey, Ian Foster, Gavin L. Allen, Georgina Kelley, Simon P. Andrews, John T. Hogan, Kelly Dowdeswell, Julian A. Storey, Craig D. |
author_sort |
White, Lee F. |
title |
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 |
title_short |
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 |
title_full |
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 |
title_fullStr |
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 |
title_full_unstemmed |
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 |
title_sort |
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 |
publisher |
Elsevier Science Bv |
url |
https://doi.org/10.1016/j.epsl.2015.10.054 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 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Archimer, archive institutionnelle de l'Ifremer Earth And Planetary Science Letters (0012-821X) (Elsevier Science Bv), 2016-01 , Vol. 433 , P. 192-203 |
op_relation |
doi:10.1016/j.epsl.2015.10.054 10670/1.dmqdxd 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 |
op_doi |
https://doi.org/10.1016/j.epsl.2015.10.054 |
container_title |
Earth and Planetary Science Letters |
container_volume |
433 |
container_start_page |
192 |
op_container_end_page |
203 |
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1766011711650791424 |