Paleomagnetic on three sediment cores from the Antarctic continental slope in the Weddell Sea
Four cores from the Antarctic continental margin located between 50 and 200 km from the present-day ice shelf edge, were selected for sedimentological and mass spectrometer analysis. The first stable isotope records of the Southern Polar Ocean can be correlated in detail with global isotope stratigr...
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1990
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.587842 2023-05-15T13:42:09+02:00 Paleomagnetic on three sediment cores from the Antarctic continental slope in the Weddell Sea Grobe, Hannes Mackensen, Andreas Hubberten, Hans-Wolfgang Spieß, Volkhard Fütterer, Dieter K MEDIAN LATITUDE: -69.551110 * MEDIAN LONGITUDE: -6.434997 * SOUTH-BOUND LATITUDE: -70.100000 * WEST-BOUND LONGITUDE: -6.850000 * NORTH-BOUND LATITUDE: -68.733330 * EAST-BOUND LONGITUDE: -5.866660 * DATE/TIME START: 1985-12-28T15:48:00 * DATE/TIME END: 1986-02-26T17:34:00 1990-11-01 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.587842 https://doi.org/10.1594/PANGAEA.587842 en eng PANGAEA Grobe, Hannes; Mackensen, Andreas (1992): Sedimentology and age models of cores from the Antarctic continental margin in the eastern Weddell Sea. PANGAEA, https://doi.org/10.1594/PANGAEA.588236 https://doi.pangaea.de/10.1594/PANGAEA.587842 https://doi.org/10.1594/PANGAEA.587842 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Grobe, Hannes; Mackensen, Andreas; Hubberten, Hans-Wolfgang; Spieß, Volkhard; Fütterer, Dieter K (1990): Stable isotope record and late quaternary sedimentation rates at the Antarctic continental margin. In: Bleil, U & Thiede, J (eds.), Geological History of the Polar Oceans - Arctic versus Antarctic, NATO ASI Series, Kluwer Academic Publishers, Dordrecht, Boston, London, 539-571, hdl:10013/epic.11660.d001 ANT-IV/3 Atka Bay AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS08 PS08/365 PS08/374 PS08/486 PS1387-3 PS1394-4 PS1431-1 SL Dataset 1990 ftpangaea https://doi.org/10.1594/PANGAEA.587842 https://doi.org/10.1594/PANGAEA.588236 2023-01-20T07:31:01Z Four cores from the Antarctic continental margin located between 50 and 200 km from the present-day ice shelf edge, were selected for sedimentological and mass spectrometer analysis. The first stable isotope records of the Southern Polar Ocean can be correlated in detail with global isotope stratigraphy. Together with magnetostratigraphic, sedimentological and micropaleontological data, the record provides stratigraphic and paleoceanographic information back to the Jaramillo subchron (910 kyr). Although the isotope values have been altered by diagenetic processes in the sediments, which are poor in carbonate, an interpretation is possible via correlation with the sedimentological parameters. Oxygen isotope data give indications for a meltwater spike at the beginning of interglacials, when large scale melting of parts of the ice shelves took place. The synchronous record of the benthic and planktonic d13C-signals reflect continuous bottom water formation also during glacials. Primary productivity was strictly reduced during glacials due to continuous ice coverage in the Weddell Sea. The climatic improvement at the beginning of an interglacial is associated with peak values in biologic activity lasting for about 15 kyr. During one climatic cycle, mean sedimentation rates at the continental margin decrease with increasing distance from the continent from 5.2 to 1.3 cm/kyr. Maximum sedimentation rates of 25 cm/kyr at the beginning of an interglacial down to 0.6 cm/kyr during glacial periods have been calculated. The rate is mainly controlled by movements of the ice shelf edge and ice rafting. Dataset Antarc* Antarctic Arctic Ice Shelf Ice Shelves Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Atka ENVELOPE(151.789,151.789,60.835,60.835) The Antarctic Weddell Weddell Sea ENVELOPE(-6.850000,-5.866660,-68.733330,-70.100000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-IV/3 Atka Bay AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS08 PS08/365 PS08/374 PS08/486 PS1387-3 PS1394-4 PS1431-1 SL |
spellingShingle |
ANT-IV/3 Atka Bay AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS08 PS08/365 PS08/374 PS08/486 PS1387-3 PS1394-4 PS1431-1 SL Grobe, Hannes Mackensen, Andreas Hubberten, Hans-Wolfgang Spieß, Volkhard Fütterer, Dieter K Paleomagnetic on three sediment cores from the Antarctic continental slope in the Weddell Sea |
topic_facet |
ANT-IV/3 Atka Bay AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS08 PS08/365 PS08/374 PS08/486 PS1387-3 PS1394-4 PS1431-1 SL |
description |
Four cores from the Antarctic continental margin located between 50 and 200 km from the present-day ice shelf edge, were selected for sedimentological and mass spectrometer analysis. The first stable isotope records of the Southern Polar Ocean can be correlated in detail with global isotope stratigraphy. Together with magnetostratigraphic, sedimentological and micropaleontological data, the record provides stratigraphic and paleoceanographic information back to the Jaramillo subchron (910 kyr). Although the isotope values have been altered by diagenetic processes in the sediments, which are poor in carbonate, an interpretation is possible via correlation with the sedimentological parameters. Oxygen isotope data give indications for a meltwater spike at the beginning of interglacials, when large scale melting of parts of the ice shelves took place. The synchronous record of the benthic and planktonic d13C-signals reflect continuous bottom water formation also during glacials. Primary productivity was strictly reduced during glacials due to continuous ice coverage in the Weddell Sea. The climatic improvement at the beginning of an interglacial is associated with peak values in biologic activity lasting for about 15 kyr. During one climatic cycle, mean sedimentation rates at the continental margin decrease with increasing distance from the continent from 5.2 to 1.3 cm/kyr. Maximum sedimentation rates of 25 cm/kyr at the beginning of an interglacial down to 0.6 cm/kyr during glacial periods have been calculated. The rate is mainly controlled by movements of the ice shelf edge and ice rafting. |
format |
Dataset |
author |
Grobe, Hannes Mackensen, Andreas Hubberten, Hans-Wolfgang Spieß, Volkhard Fütterer, Dieter K |
author_facet |
Grobe, Hannes Mackensen, Andreas Hubberten, Hans-Wolfgang Spieß, Volkhard Fütterer, Dieter K |
author_sort |
Grobe, Hannes |
title |
Paleomagnetic on three sediment cores from the Antarctic continental slope in the Weddell Sea |
title_short |
Paleomagnetic on three sediment cores from the Antarctic continental slope in the Weddell Sea |
title_full |
Paleomagnetic on three sediment cores from the Antarctic continental slope in the Weddell Sea |
title_fullStr |
Paleomagnetic on three sediment cores from the Antarctic continental slope in the Weddell Sea |
title_full_unstemmed |
Paleomagnetic on three sediment cores from the Antarctic continental slope in the Weddell Sea |
title_sort |
paleomagnetic on three sediment cores from the antarctic continental slope in the weddell sea |
publisher |
PANGAEA |
publishDate |
1990 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.587842 https://doi.org/10.1594/PANGAEA.587842 |
op_coverage |
MEDIAN LATITUDE: -69.551110 * MEDIAN LONGITUDE: -6.434997 * SOUTH-BOUND LATITUDE: -70.100000 * WEST-BOUND LONGITUDE: -6.850000 * NORTH-BOUND LATITUDE: -68.733330 * EAST-BOUND LONGITUDE: -5.866660 * DATE/TIME START: 1985-12-28T15:48:00 * DATE/TIME END: 1986-02-26T17:34:00 |
long_lat |
ENVELOPE(151.789,151.789,60.835,60.835) ENVELOPE(-6.850000,-5.866660,-68.733330,-70.100000) |
geographic |
Antarctic Atka The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Atka The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Arctic Ice Shelf Ice Shelves Weddell Sea |
genre_facet |
Antarc* Antarctic Arctic Ice Shelf Ice Shelves Weddell Sea |
op_source |
Supplement to: Grobe, Hannes; Mackensen, Andreas; Hubberten, Hans-Wolfgang; Spieß, Volkhard; Fütterer, Dieter K (1990): Stable isotope record and late quaternary sedimentation rates at the Antarctic continental margin. In: Bleil, U & Thiede, J (eds.), Geological History of the Polar Oceans - Arctic versus Antarctic, NATO ASI Series, Kluwer Academic Publishers, Dordrecht, Boston, London, 539-571, hdl:10013/epic.11660.d001 |
op_relation |
Grobe, Hannes; Mackensen, Andreas (1992): Sedimentology and age models of cores from the Antarctic continental margin in the eastern Weddell Sea. PANGAEA, https://doi.org/10.1594/PANGAEA.588236 https://doi.pangaea.de/10.1594/PANGAEA.587842 https://doi.org/10.1594/PANGAEA.587842 |
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.587842 https://doi.org/10.1594/PANGAEA.588236 |
_version_ |
1766163210193338368 |