Sedimentary record of the western Amundsen Sea Embayment after the last glacial maximum, supplement to: Hillenbrand, Claus-Dieter; Smith, James A; Kuhn, Gerhard; Esper, Oliver; Gersonde, Rainer; Larter, Robert D; Maher, Barbara A; Moreton, Steven Grahame; Shimmield, Tracy M; Korte, Monika (2010): Age assignment of a diatomaceous ooze deposited in the western Amundsen Sea Embayment after the last glacial maximum. Journal of Quaternary Science, 25(3), 280-295
Reliable dating of glaciomarine sediments deposited on the Antarctic shelf since the Last Glacial Maximum (LGM) is very challenging because of the general absence of calcareous (micro-) fossils and the recycling of fossil organic matter. As a consequence, radiocarbon (14C) ages of the acid-insoluble...
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Format: | Article in Journal/Newspaper |
Language: | English |
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PANGAEA - Data Publisher for Earth & Environmental Science
2010
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Online Access: | https://dx.doi.org/10.1594/pangaea.715974 https://doi.pangaea.de/10.1594/PANGAEA.715974 |
id |
ftdatacite:10.1594/pangaea.715974 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Box corer Vibro corer CTD/Rosette Gravity corer Giant box corer JR20060109 ANT-XXIII/4 James Clark Ross Polarstern International Polar Year 2007-2008 IPY Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
spellingShingle |
Box corer Vibro corer CTD/Rosette Gravity corer Giant box corer JR20060109 ANT-XXIII/4 James Clark Ross Polarstern International Polar Year 2007-2008 IPY Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Hillenbrand, Claus-Dieter Smith, James A Kuhn, Gerhard Esper, Oliver Gersonde, Rainer Larter, Robert D Maher, Barbara A Moreton, Steven Grahame Shimmield, Tracy M Korte, Monika Sedimentary record of the western Amundsen Sea Embayment after the last glacial maximum, supplement to: Hillenbrand, Claus-Dieter; Smith, James A; Kuhn, Gerhard; Esper, Oliver; Gersonde, Rainer; Larter, Robert D; Maher, Barbara A; Moreton, Steven Grahame; Shimmield, Tracy M; Korte, Monika (2010): Age assignment of a diatomaceous ooze deposited in the western Amundsen Sea Embayment after the last glacial maximum. Journal of Quaternary Science, 25(3), 280-295 |
topic_facet |
Box corer Vibro corer CTD/Rosette Gravity corer Giant box corer JR20060109 ANT-XXIII/4 James Clark Ross Polarstern International Polar Year 2007-2008 IPY Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
description |
Reliable dating of glaciomarine sediments deposited on the Antarctic shelf since the Last Glacial Maximum (LGM) is very challenging because of the general absence of calcareous (micro-) fossils and the recycling of fossil organic matter. As a consequence, radiocarbon (14C) ages of the acid-insoluble organic fraction (AIO) of the sediments bear uncertainties that are very difficult to quantify. In this paper we present the results of three different chronostratigraphic methods to date a sedimentary unit consisting of diatomaceous ooze and diatomaceous mud that was deposited following the last deglaciation at five core sites on the inner shelf in the western Amundsen Sea (West Antarctica). In three cores conventional 14C dating of the AIO in bulk sediment samples yielded age reversals down-core, but at all sites the AIO 14C ages obtained from diatomaceous ooze within the diatom-rich unit yielded similar uncorrected 14C ages ranging from 13,517±56 to 11,543±47 years before present (yr BP). Correction of these ages by subtracting the core-top ages, which are assumed to reflect present-day deposition (as indicated by 21044 Pb dating of the sediment surface at one core site), yielded ages between ca. 10,500 and 8,400 calibrated years before present (cal yr BP). Correction of the AIO ages of the diatomaceous ooze by only subtracting the marine reservoir effect (MRE) of 1,300 years indicated deposition of the diatom-rich sediments between 14,100 and 11,900 cal yr BP. Most of these ages are consistent with age constraints between 13.0 and 8.0 ka BP for the diatom-rich unit, which we obtained by correlating the relative palaeomagnetic intensity (RPI) records of three of the sediment cores with global and regional reference curves for palaeomagnetic intensity. As a third dating technique we applied conventional 53 radiocarbon dating of the AIO included in acid-cleaned diatom hard parts that were extracted from the diatomaceous ooze. This method yielded uncorrected 14C ages of only 5,111±38 and 5,106±38 yr BP, respectively. We reject these young ages, because they are likely to be overprinted by the adsorption of modern atmospheric carbon dioxide onto the surfaces of the extracted diatom hard parts prior to sample graphitisation and combustion for 14C dating. The deposition of the diatom-rich unit in the western Amundsen Sea suggests deglaciation of the inner shelf before ca. 13 ka BP. The deposition of diatomaceous oozes on other parts of the Antarctic shelf around the same time, however, seems to be coincidental rather than directly related. : Data included in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 |
format |
Article in Journal/Newspaper |
author |
Hillenbrand, Claus-Dieter Smith, James A Kuhn, Gerhard Esper, Oliver Gersonde, Rainer Larter, Robert D Maher, Barbara A Moreton, Steven Grahame Shimmield, Tracy M Korte, Monika |
author_facet |
Hillenbrand, Claus-Dieter Smith, James A Kuhn, Gerhard Esper, Oliver Gersonde, Rainer Larter, Robert D Maher, Barbara A Moreton, Steven Grahame Shimmield, Tracy M Korte, Monika |
author_sort |
Hillenbrand, Claus-Dieter |
title |
Sedimentary record of the western Amundsen Sea Embayment after the last glacial maximum, supplement to: Hillenbrand, Claus-Dieter; Smith, James A; Kuhn, Gerhard; Esper, Oliver; Gersonde, Rainer; Larter, Robert D; Maher, Barbara A; Moreton, Steven Grahame; Shimmield, Tracy M; Korte, Monika (2010): Age assignment of a diatomaceous ooze deposited in the western Amundsen Sea Embayment after the last glacial maximum. Journal of Quaternary Science, 25(3), 280-295 |
title_short |
Sedimentary record of the western Amundsen Sea Embayment after the last glacial maximum, supplement to: Hillenbrand, Claus-Dieter; Smith, James A; Kuhn, Gerhard; Esper, Oliver; Gersonde, Rainer; Larter, Robert D; Maher, Barbara A; Moreton, Steven Grahame; Shimmield, Tracy M; Korte, Monika (2010): Age assignment of a diatomaceous ooze deposited in the western Amundsen Sea Embayment after the last glacial maximum. Journal of Quaternary Science, 25(3), 280-295 |
title_full |
Sedimentary record of the western Amundsen Sea Embayment after the last glacial maximum, supplement to: Hillenbrand, Claus-Dieter; Smith, James A; Kuhn, Gerhard; Esper, Oliver; Gersonde, Rainer; Larter, Robert D; Maher, Barbara A; Moreton, Steven Grahame; Shimmield, Tracy M; Korte, Monika (2010): Age assignment of a diatomaceous ooze deposited in the western Amundsen Sea Embayment after the last glacial maximum. Journal of Quaternary Science, 25(3), 280-295 |
title_fullStr |
Sedimentary record of the western Amundsen Sea Embayment after the last glacial maximum, supplement to: Hillenbrand, Claus-Dieter; Smith, James A; Kuhn, Gerhard; Esper, Oliver; Gersonde, Rainer; Larter, Robert D; Maher, Barbara A; Moreton, Steven Grahame; Shimmield, Tracy M; Korte, Monika (2010): Age assignment of a diatomaceous ooze deposited in the western Amundsen Sea Embayment after the last glacial maximum. Journal of Quaternary Science, 25(3), 280-295 |
title_full_unstemmed |
Sedimentary record of the western Amundsen Sea Embayment after the last glacial maximum, supplement to: Hillenbrand, Claus-Dieter; Smith, James A; Kuhn, Gerhard; Esper, Oliver; Gersonde, Rainer; Larter, Robert D; Maher, Barbara A; Moreton, Steven Grahame; Shimmield, Tracy M; Korte, Monika (2010): Age assignment of a diatomaceous ooze deposited in the western Amundsen Sea Embayment after the last glacial maximum. Journal of Quaternary Science, 25(3), 280-295 |
title_sort |
sedimentary record of the western amundsen sea embayment after the last glacial maximum, supplement to: hillenbrand, claus-dieter; smith, james a; kuhn, gerhard; esper, oliver; gersonde, rainer; larter, robert d; maher, barbara a; moreton, steven grahame; shimmield, tracy m; korte, monika (2010): age assignment of a diatomaceous ooze deposited in the western amundsen sea embayment after the last glacial maximum. journal of quaternary science, 25(3), 280-295 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2010 |
url |
https://dx.doi.org/10.1594/pangaea.715974 https://doi.pangaea.de/10.1594/PANGAEA.715974 |
long_lat |
ENVELOPE(-81.183,-81.183,51.067,51.067) ENVELOPE(-46.033,-46.033,-60.616,-60.616) |
geographic |
Amundsen Sea Antarctic Maher Moreton The Antarctic West Antarctica |
geographic_facet |
Amundsen Sea Antarctic Maher Moreton The Antarctic West Antarctica |
genre |
Amundsen Sea Antarc* Antarctic Antarctica International Polar Year IPY West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica International Polar Year IPY West Antarctica |
op_relation |
https://dx.doi.org/10.1002/jqs.1308 |
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.715974 https://doi.org/10.1002/jqs.1308 |
_version_ |
1766376125391437824 |
spelling |
ftdatacite:10.1594/pangaea.715974 2023-05-15T13:23:53+02:00 Sedimentary record of the western Amundsen Sea Embayment after the last glacial maximum, supplement to: Hillenbrand, Claus-Dieter; Smith, James A; Kuhn, Gerhard; Esper, Oliver; Gersonde, Rainer; Larter, Robert D; Maher, Barbara A; Moreton, Steven Grahame; Shimmield, Tracy M; Korte, Monika (2010): Age assignment of a diatomaceous ooze deposited in the western Amundsen Sea Embayment after the last glacial maximum. Journal of Quaternary Science, 25(3), 280-295 Hillenbrand, Claus-Dieter Smith, James A Kuhn, Gerhard Esper, Oliver Gersonde, Rainer Larter, Robert D Maher, Barbara A Moreton, Steven Grahame Shimmield, Tracy M Korte, Monika 2010 application/zip https://dx.doi.org/10.1594/pangaea.715974 https://doi.pangaea.de/10.1594/PANGAEA.715974 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1002/jqs.1308 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Box corer Vibro corer CTD/Rosette Gravity corer Giant box corer JR20060109 ANT-XXIII/4 James Clark Ross Polarstern International Polar Year 2007-2008 IPY Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo article Supplementary Collection of Datasets Collection 2010 ftdatacite https://doi.org/10.1594/pangaea.715974 https://doi.org/10.1002/jqs.1308 2022-02-09T12:06:21Z Reliable dating of glaciomarine sediments deposited on the Antarctic shelf since the Last Glacial Maximum (LGM) is very challenging because of the general absence of calcareous (micro-) fossils and the recycling of fossil organic matter. As a consequence, radiocarbon (14C) ages of the acid-insoluble organic fraction (AIO) of the sediments bear uncertainties that are very difficult to quantify. In this paper we present the results of three different chronostratigraphic methods to date a sedimentary unit consisting of diatomaceous ooze and diatomaceous mud that was deposited following the last deglaciation at five core sites on the inner shelf in the western Amundsen Sea (West Antarctica). In three cores conventional 14C dating of the AIO in bulk sediment samples yielded age reversals down-core, but at all sites the AIO 14C ages obtained from diatomaceous ooze within the diatom-rich unit yielded similar uncorrected 14C ages ranging from 13,517±56 to 11,543±47 years before present (yr BP). Correction of these ages by subtracting the core-top ages, which are assumed to reflect present-day deposition (as indicated by 21044 Pb dating of the sediment surface at one core site), yielded ages between ca. 10,500 and 8,400 calibrated years before present (cal yr BP). Correction of the AIO ages of the diatomaceous ooze by only subtracting the marine reservoir effect (MRE) of 1,300 years indicated deposition of the diatom-rich sediments between 14,100 and 11,900 cal yr BP. Most of these ages are consistent with age constraints between 13.0 and 8.0 ka BP for the diatom-rich unit, which we obtained by correlating the relative palaeomagnetic intensity (RPI) records of three of the sediment cores with global and regional reference curves for palaeomagnetic intensity. As a third dating technique we applied conventional 53 radiocarbon dating of the AIO included in acid-cleaned diatom hard parts that were extracted from the diatomaceous ooze. This method yielded uncorrected 14C ages of only 5,111±38 and 5,106±38 yr BP, respectively. We reject these young ages, because they are likely to be overprinted by the adsorption of modern atmospheric carbon dioxide onto the surfaces of the extracted diatom hard parts prior to sample graphitisation and combustion for 14C dating. The deposition of the diatom-rich unit in the western Amundsen Sea suggests deglaciation of the inner shelf before ca. 13 ka BP. The deposition of diatomaceous oozes on other parts of the Antarctic shelf around the same time, however, seems to be coincidental rather than directly related. : Data included in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica International Polar Year IPY West Antarctica DataCite Metadata Store (German National Library of Science and Technology) Amundsen Sea Antarctic Maher ENVELOPE(-81.183,-81.183,51.067,51.067) Moreton ENVELOPE(-46.033,-46.033,-60.616,-60.616) The Antarctic West Antarctica |