Sedimentological, mineralogical, biogeochemical and micropaleontological parameters on sediment core PS69/849-2, Burton Basin, MacRobertson Shelf, East Antarctica
A multi-proxy study including sedimentological, mineralogical, biogeochemical and micropaleontological methods was conducted on sediment core PS69/849-2 retrieved from Burton Basin, MacRobertson Shelf, East Antarctica. The goal of this study was to depict the deglacial and Holocene environmental his...
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Language: | English |
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PANGAEA
2015
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.848478 https://doi.org/10.1594/PANGAEA.848478 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.848478 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 |
spellingShingle |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 Borchers, Andreas Dietze, Elisabeth Kuhn, Gerhard Esper, Oliver Voigt, Ines Hartmann, Kai Diekmann, Bernhard Sedimentological, mineralogical, biogeochemical and micropaleontological parameters on sediment core PS69/849-2, Burton Basin, MacRobertson Shelf, East Antarctica |
topic_facet |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 |
description |
A multi-proxy study including sedimentological, mineralogical, biogeochemical and micropaleontological methods was conducted on sediment core PS69/849-2 retrieved from Burton Basin, MacRobertson Shelf, East Antarctica. The goal of this study was to depict the deglacial and Holocene environmental history of the MacRobertson Land-Prydz Bay region. A special focus was put on the timing of ice-sheet retreat and the variability of bottom-water formation due to sea ice formation through the Holocene. Results from site PS69/849-2 provide the first paleo-environmental record of Holocene variations in bottom-water production probably associated to the Cape Darnley polynya, which is the second largest polynya in the Antarctic. Methods included end-member modeling of laser-derived high-resolution grain size data to reconstruct the depositional regimes and bottom-water activity. The provenance of current-derived and ice-transported material was reconstructed using clay-mineral and heavy-mineral analysis. Conclusions on biogenic production were drawn by determination of biogenic opal and total organic carbon. It was found that the ice shelf front started to retreat from the site around 12.8 ka BP. This coincides with results from other records in Prydz Bay and suggests warming during the early Holocene optimum next to global sea level rise as the main trigger. Ice-rafted debris was then supplied to the site until 5.5 cal. ka BP, when Holocene global sea level rise stabilized and glacial isostatic rebound on MacRobertson Land commenced. Throughout the Holocene, three episodes of enhanced bottom-water activity probably due to elevated brine rejection in Cape Darnley polynya occured between 11.5 and 9 cal. ka BP, 5.6 and 4.5 cal. ka BP and since 1.5 cal. ka BP. These periods are related to shifts from warmer to cooler conditions at the end of Holocene warm periods, in particular the early Holocene optimum, the mid-Holocene warm period and at the beginning of the neoglacial. In contrast, between 7.7 and 6.7 cal. ka BP, brine ... |
format |
Dataset |
author |
Borchers, Andreas Dietze, Elisabeth Kuhn, Gerhard Esper, Oliver Voigt, Ines Hartmann, Kai Diekmann, Bernhard |
author_facet |
Borchers, Andreas Dietze, Elisabeth Kuhn, Gerhard Esper, Oliver Voigt, Ines Hartmann, Kai Diekmann, Bernhard |
author_sort |
Borchers, Andreas |
title |
Sedimentological, mineralogical, biogeochemical and micropaleontological parameters on sediment core PS69/849-2, Burton Basin, MacRobertson Shelf, East Antarctica |
title_short |
Sedimentological, mineralogical, biogeochemical and micropaleontological parameters on sediment core PS69/849-2, Burton Basin, MacRobertson Shelf, East Antarctica |
title_full |
Sedimentological, mineralogical, biogeochemical and micropaleontological parameters on sediment core PS69/849-2, Burton Basin, MacRobertson Shelf, East Antarctica |
title_fullStr |
Sedimentological, mineralogical, biogeochemical and micropaleontological parameters on sediment core PS69/849-2, Burton Basin, MacRobertson Shelf, East Antarctica |
title_full_unstemmed |
Sedimentological, mineralogical, biogeochemical and micropaleontological parameters on sediment core PS69/849-2, Burton Basin, MacRobertson Shelf, East Antarctica |
title_sort |
sedimentological, mineralogical, biogeochemical and micropaleontological parameters on sediment core ps69/849-2, burton basin, macrobertson shelf, east antarctica |
publisher |
PANGAEA |
publishDate |
2015 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.848478 https://doi.org/10.1594/PANGAEA.848478 |
op_coverage |
MEDIAN LATITUDE: -67.583794 * MEDIAN LONGITUDE: 68.118059 * SOUTH-BOUND LATITUDE: -67.583830 * WEST-BOUND LONGITUDE: 68.117500 * NORTH-BOUND LATITUDE: -67.583330 * EAST-BOUND LONGITUDE: 68.125330 * DATE/TIME START: 2007-03-11T08:37:00 * DATE/TIME END: 2007-03-11T09:46:00 |
long_lat |
ENVELOPE(166.733,166.733,-72.550,-72.550) ENVELOPE(69.717,69.717,-67.717,-67.717) ENVELOPE(69.567,69.567,-67.738,-67.738) ENVELOPE(65.000,65.000,-70.000,-70.000) ENVELOPE(68.117500,68.125330,-67.583330,-67.583830) |
geographic |
Arctic Antarctic The Antarctic East Antarctica Prydz Bay Burton Darnley Cape Darnley MacRobertson Land |
geographic_facet |
Arctic Antarctic The Antarctic East Antarctica Prydz Bay Burton Darnley Cape Darnley MacRobertson Land |
genre |
Antarc* Antarctic Antarctica Arctic East Antarctica Ice Sheet Ice Shelf MacRobertson Land Prydz Bay Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Arctic East Antarctica Ice Sheet Ice Shelf MacRobertson Land Prydz Bay Sea ice |
op_source |
Supplement to: Borchers, Andreas; Dietze, Elisabeth; Kuhn, Gerhard; Esper, Oliver; Voigt, Ines; Hartmann, Kai; Diekmann, Bernhard (2015): Holocene ice dynamics and bottom-water formation associated with Cape Darnley polynya activity recorded in Burton Basin, East Antarctica. Marine Geophysical Research, https://doi.org/10.1007/s11001-015-9254-z |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.848478 https://doi.org/10.1594/PANGAEA.848478 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.848478 https://doi.org/10.1007/s11001-015-9254-z |
_version_ |
1766206311790280704 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.848478 2023-05-15T13:44:47+02:00 Sedimentological, mineralogical, biogeochemical and micropaleontological parameters on sediment core PS69/849-2, Burton Basin, MacRobertson Shelf, East Antarctica Borchers, Andreas Dietze, Elisabeth Kuhn, Gerhard Esper, Oliver Voigt, Ines Hartmann, Kai Diekmann, Bernhard MEDIAN LATITUDE: -67.583794 * MEDIAN LONGITUDE: 68.118059 * SOUTH-BOUND LATITUDE: -67.583830 * WEST-BOUND LONGITUDE: 68.117500 * NORTH-BOUND LATITUDE: -67.583330 * EAST-BOUND LONGITUDE: 68.125330 * DATE/TIME START: 2007-03-11T08:37:00 * DATE/TIME END: 2007-03-11T09:46:00 2015-07-24 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.848478 https://doi.org/10.1594/PANGAEA.848478 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.848478 https://doi.org/10.1594/PANGAEA.848478 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Borchers, Andreas; Dietze, Elisabeth; Kuhn, Gerhard; Esper, Oliver; Voigt, Ines; Hartmann, Kai; Diekmann, Bernhard (2015): Holocene ice dynamics and bottom-water formation associated with Cape Darnley polynya activity recorded in Burton Basin, East Antarctica. Marine Geophysical Research, https://doi.org/10.1007/s11001-015-9254-z AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 Dataset 2015 ftpangaea https://doi.org/10.1594/PANGAEA.848478 https://doi.org/10.1007/s11001-015-9254-z 2023-01-20T07:33:29Z A multi-proxy study including sedimentological, mineralogical, biogeochemical and micropaleontological methods was conducted on sediment core PS69/849-2 retrieved from Burton Basin, MacRobertson Shelf, East Antarctica. The goal of this study was to depict the deglacial and Holocene environmental history of the MacRobertson Land-Prydz Bay region. A special focus was put on the timing of ice-sheet retreat and the variability of bottom-water formation due to sea ice formation through the Holocene. Results from site PS69/849-2 provide the first paleo-environmental record of Holocene variations in bottom-water production probably associated to the Cape Darnley polynya, which is the second largest polynya in the Antarctic. Methods included end-member modeling of laser-derived high-resolution grain size data to reconstruct the depositional regimes and bottom-water activity. The provenance of current-derived and ice-transported material was reconstructed using clay-mineral and heavy-mineral analysis. Conclusions on biogenic production were drawn by determination of biogenic opal and total organic carbon. It was found that the ice shelf front started to retreat from the site around 12.8 ka BP. This coincides with results from other records in Prydz Bay and suggests warming during the early Holocene optimum next to global sea level rise as the main trigger. Ice-rafted debris was then supplied to the site until 5.5 cal. ka BP, when Holocene global sea level rise stabilized and glacial isostatic rebound on MacRobertson Land commenced. Throughout the Holocene, three episodes of enhanced bottom-water activity probably due to elevated brine rejection in Cape Darnley polynya occured between 11.5 and 9 cal. ka BP, 5.6 and 4.5 cal. ka BP and since 1.5 cal. ka BP. These periods are related to shifts from warmer to cooler conditions at the end of Holocene warm periods, in particular the early Holocene optimum, the mid-Holocene warm period and at the beginning of the neoglacial. In contrast, between 7.7 and 6.7 cal. ka BP, brine ... Dataset Antarc* Antarctic Antarctica Arctic East Antarctica Ice Sheet Ice Shelf MacRobertson Land Prydz Bay Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Arctic Antarctic The Antarctic East Antarctica Prydz Bay Burton ENVELOPE(166.733,166.733,-72.550,-72.550) Darnley ENVELOPE(69.717,69.717,-67.717,-67.717) Cape Darnley ENVELOPE(69.567,69.567,-67.738,-67.738) MacRobertson Land ENVELOPE(65.000,65.000,-70.000,-70.000) ENVELOPE(68.117500,68.125330,-67.583330,-67.583830) |