Nd bulk isotopes and 40Ar/39Ar ages of individual minerals from Aurora and Wilkes sub-glacial basin sediments, supplement to: Pierce, Elizabeth L; Williams, Trevor; van de Flierdt, Tina; Hemming, Sidney R; Goldstein, Steven L; Brachfeld, Stefanie A (2011): Characterizing the sediment provenance of East Antarctica's weak underbelly: The Aurora and Wilkes sub-glacial basins. Paleoceanography, 26(4), PA4217
The Wilkes and Aurora basins are large, low-lying sub-glacial basins that may cause areas of weakness in the overlying East Antarctic ice sheet. Previous work based on ice-rafted debris (IRD) provenance analyses found evidence for massive iceberg discharges from these areas during the late Miocene a...
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Online Access: | https://dx.doi.org/10.1594/pangaea.829630 https://doi.pangaea.de/10.1594/PANGAEA.829630 |
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ftdatacite:10.1594/pangaea.829630 2023-05-15T13:33:00+02:00 Nd bulk isotopes and 40Ar/39Ar ages of individual minerals from Aurora and Wilkes sub-glacial basin sediments, supplement to: Pierce, Elizabeth L; Williams, Trevor; van de Flierdt, Tina; Hemming, Sidney R; Goldstein, Steven L; Brachfeld, Stefanie A (2011): Characterizing the sediment provenance of East Antarctica's weak underbelly: The Aurora and Wilkes sub-glacial basins. Paleoceanography, 26(4), PA4217 Pierce, Elizabeth L Williams, Trevor van de Flierdt, Tina Hemming, Sidney R Goldstein, Steven L Brachfeld, Stefanie A 2011 application/zip https://dx.doi.org/10.1594/pangaea.829630 https://doi.pangaea.de/10.1594/PANGAEA.829630 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/2011pa002127 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 2011 ftdatacite https://doi.org/10.1594/pangaea.829630 https://doi.org/10.1029/2011pa002127 2022-02-08T16:24:46Z The Wilkes and Aurora basins are large, low-lying sub-glacial basins that may cause areas of weakness in the overlying East Antarctic ice sheet. Previous work based on ice-rafted debris (IRD) provenance analyses found evidence for massive iceberg discharges from these areas during the late Miocene and Pliocene. Here we characterize the sediments shed from the inferred areas of weakness along this margin (94°E to 165°E) by measuring40Ar/39Ar ages of 292 individual detrital hornblende grains from eight marine sediment core locations off East Antarctica and Nd isotopic compositions of the bulk fine fraction from the same sediments. We further expand the toolbox for Antarctic IRD provenance analyses by exploring the application of 40Ar/39Ar ages of detrital biotites; biotite as an IRD tracer eliminates lithological biases imposed by only analyzing hornblendes and allows for characterization of samples with low IRD concentrations. Our data quadruples the number of detrital 40Ar/39Ar ages from this margin of East Antarctica and leads to the following conclusions: (1) Four main sectors between the Ross Sea and Prydz Bay, separated by ice drainage divides, are distinguishable based upon the combination of 40Ar/39Ar ages of detrital hornblende and biotite grains and the e-Nd of the bulk fine fraction; (2) 40Ar/39Ar biotite ages can be used as a robust provenance tracer for this part of East Antarctica; and (3) sediments shed from the coastal areas of the Aurora and Wilkes sub-glacial basins can be clearly distinguished from one another based upon their isotopic fingerprints. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Iceberg* Prydz Bay Ross Sea DataCite Metadata Store (German National Library of Science and Technology) Antarctic East Antarctica Ross Sea Prydz Bay East Antarctic Ice Sheet |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Ocean Drilling Program ODP |
spellingShingle |
Ocean Drilling Program ODP Pierce, Elizabeth L Williams, Trevor van de Flierdt, Tina Hemming, Sidney R Goldstein, Steven L Brachfeld, Stefanie A Nd bulk isotopes and 40Ar/39Ar ages of individual minerals from Aurora and Wilkes sub-glacial basin sediments, supplement to: Pierce, Elizabeth L; Williams, Trevor; van de Flierdt, Tina; Hemming, Sidney R; Goldstein, Steven L; Brachfeld, Stefanie A (2011): Characterizing the sediment provenance of East Antarctica's weak underbelly: The Aurora and Wilkes sub-glacial basins. Paleoceanography, 26(4), PA4217 |
topic_facet |
Ocean Drilling Program ODP |
description |
The Wilkes and Aurora basins are large, low-lying sub-glacial basins that may cause areas of weakness in the overlying East Antarctic ice sheet. Previous work based on ice-rafted debris (IRD) provenance analyses found evidence for massive iceberg discharges from these areas during the late Miocene and Pliocene. Here we characterize the sediments shed from the inferred areas of weakness along this margin (94°E to 165°E) by measuring40Ar/39Ar ages of 292 individual detrital hornblende grains from eight marine sediment core locations off East Antarctica and Nd isotopic compositions of the bulk fine fraction from the same sediments. We further expand the toolbox for Antarctic IRD provenance analyses by exploring the application of 40Ar/39Ar ages of detrital biotites; biotite as an IRD tracer eliminates lithological biases imposed by only analyzing hornblendes and allows for characterization of samples with low IRD concentrations. Our data quadruples the number of detrital 40Ar/39Ar ages from this margin of East Antarctica and leads to the following conclusions: (1) Four main sectors between the Ross Sea and Prydz Bay, separated by ice drainage divides, are distinguishable based upon the combination of 40Ar/39Ar ages of detrital hornblende and biotite grains and the e-Nd of the bulk fine fraction; (2) 40Ar/39Ar biotite ages can be used as a robust provenance tracer for this part of East Antarctica; and (3) sediments shed from the coastal areas of the Aurora and Wilkes sub-glacial basins can be clearly distinguished from one another based upon their isotopic fingerprints. |
format |
Article in Journal/Newspaper |
author |
Pierce, Elizabeth L Williams, Trevor van de Flierdt, Tina Hemming, Sidney R Goldstein, Steven L Brachfeld, Stefanie A |
author_facet |
Pierce, Elizabeth L Williams, Trevor van de Flierdt, Tina Hemming, Sidney R Goldstein, Steven L Brachfeld, Stefanie A |
author_sort |
Pierce, Elizabeth L |
title |
Nd bulk isotopes and 40Ar/39Ar ages of individual minerals from Aurora and Wilkes sub-glacial basin sediments, supplement to: Pierce, Elizabeth L; Williams, Trevor; van de Flierdt, Tina; Hemming, Sidney R; Goldstein, Steven L; Brachfeld, Stefanie A (2011): Characterizing the sediment provenance of East Antarctica's weak underbelly: The Aurora and Wilkes sub-glacial basins. Paleoceanography, 26(4), PA4217 |
title_short |
Nd bulk isotopes and 40Ar/39Ar ages of individual minerals from Aurora and Wilkes sub-glacial basin sediments, supplement to: Pierce, Elizabeth L; Williams, Trevor; van de Flierdt, Tina; Hemming, Sidney R; Goldstein, Steven L; Brachfeld, Stefanie A (2011): Characterizing the sediment provenance of East Antarctica's weak underbelly: The Aurora and Wilkes sub-glacial basins. Paleoceanography, 26(4), PA4217 |
title_full |
Nd bulk isotopes and 40Ar/39Ar ages of individual minerals from Aurora and Wilkes sub-glacial basin sediments, supplement to: Pierce, Elizabeth L; Williams, Trevor; van de Flierdt, Tina; Hemming, Sidney R; Goldstein, Steven L; Brachfeld, Stefanie A (2011): Characterizing the sediment provenance of East Antarctica's weak underbelly: The Aurora and Wilkes sub-glacial basins. Paleoceanography, 26(4), PA4217 |
title_fullStr |
Nd bulk isotopes and 40Ar/39Ar ages of individual minerals from Aurora and Wilkes sub-glacial basin sediments, supplement to: Pierce, Elizabeth L; Williams, Trevor; van de Flierdt, Tina; Hemming, Sidney R; Goldstein, Steven L; Brachfeld, Stefanie A (2011): Characterizing the sediment provenance of East Antarctica's weak underbelly: The Aurora and Wilkes sub-glacial basins. Paleoceanography, 26(4), PA4217 |
title_full_unstemmed |
Nd bulk isotopes and 40Ar/39Ar ages of individual minerals from Aurora and Wilkes sub-glacial basin sediments, supplement to: Pierce, Elizabeth L; Williams, Trevor; van de Flierdt, Tina; Hemming, Sidney R; Goldstein, Steven L; Brachfeld, Stefanie A (2011): Characterizing the sediment provenance of East Antarctica's weak underbelly: The Aurora and Wilkes sub-glacial basins. Paleoceanography, 26(4), PA4217 |
title_sort |
nd bulk isotopes and 40ar/39ar ages of individual minerals from aurora and wilkes sub-glacial basin sediments, supplement to: pierce, elizabeth l; williams, trevor; van de flierdt, tina; hemming, sidney r; goldstein, steven l; brachfeld, stefanie a (2011): characterizing the sediment provenance of east antarctica's weak underbelly: the aurora and wilkes sub-glacial basins. paleoceanography, 26(4), pa4217 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2011 |
url |
https://dx.doi.org/10.1594/pangaea.829630 https://doi.pangaea.de/10.1594/PANGAEA.829630 |
geographic |
Antarctic East Antarctica Ross Sea Prydz Bay East Antarctic Ice Sheet |
geographic_facet |
Antarctic East Antarctica Ross Sea Prydz Bay East Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Iceberg* Prydz Bay Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Iceberg* Prydz Bay Ross Sea |
op_relation |
https://dx.doi.org/10.1029/2011pa002127 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.829630 https://doi.org/10.1029/2011pa002127 |
_version_ |
1766037545756393472 |