Radionuclides of bulk and terrigenous surface sediments in the Southern Ocean
Sr and Nd isotopic compositions of Late Quaternary surface sediment and sediment cores from the south Atlantic and southeast Pacific sectors of the Southern Ocean are used to constrain the provenance and transport mechanisms of their terrigenous component. We report isotopic and mineralogical data f...
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Format: | Dataset |
Language: | English |
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PANGAEA
2000
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.735071 https://doi.org/10.1594/PANGAEA.735071 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.735071 |
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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 |
Antarctic Peninsula ANTARTIDA8611 ANT-I/2 ANT-V/4 ANT-VI/2 ANT-X/5 ANT-XI/2 ANT-XII/4 ANT-XIV/3 AWI_MarGeoChem AWI_Paleo BC Box corer D-ORC-015 Filchner Shelf Filchner Trough Giant box corer GKG Gravity corer (Kiel type) HAND KL Marine Geochemistry @ AWI MUC MultiCorer Nuevo Alcocero Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS01 PS01/177 PS10 PS10/738 PS1016-1 PS12 PS12/116 PS12/199 PS1490-2 PS1537-2 PS1563-1 PS22/817 PS22 06AQANTX_5 PS2319-1 PS2495-3 PS2515-3 PS2659-2 PS2684-1 PS2697-1 PS2716-2 PS28 PS28/293 |
spellingShingle |
Antarctic Peninsula ANTARTIDA8611 ANT-I/2 ANT-V/4 ANT-VI/2 ANT-X/5 ANT-XI/2 ANT-XII/4 ANT-XIV/3 AWI_MarGeoChem AWI_Paleo BC Box corer D-ORC-015 Filchner Shelf Filchner Trough Giant box corer GKG Gravity corer (Kiel type) HAND KL Marine Geochemistry @ AWI MUC MultiCorer Nuevo Alcocero Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS01 PS01/177 PS10 PS10/738 PS1016-1 PS12 PS12/116 PS12/199 PS1490-2 PS1537-2 PS1563-1 PS22/817 PS22 06AQANTX_5 PS2319-1 PS2495-3 PS2515-3 PS2659-2 PS2684-1 PS2697-1 PS2716-2 PS28 PS28/293 Walter, Hans-Jürgen Hegner, Ernst Diekmann, Bernhard Kuhn, Gerhard Rutgers van der Loeff, Michiel M Radionuclides of bulk and terrigenous surface sediments in the Southern Ocean |
topic_facet |
Antarctic Peninsula ANTARTIDA8611 ANT-I/2 ANT-V/4 ANT-VI/2 ANT-X/5 ANT-XI/2 ANT-XII/4 ANT-XIV/3 AWI_MarGeoChem AWI_Paleo BC Box corer D-ORC-015 Filchner Shelf Filchner Trough Giant box corer GKG Gravity corer (Kiel type) HAND KL Marine Geochemistry @ AWI MUC MultiCorer Nuevo Alcocero Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS01 PS01/177 PS10 PS10/738 PS1016-1 PS12 PS12/116 PS12/199 PS1490-2 PS1537-2 PS1563-1 PS22/817 PS22 06AQANTX_5 PS2319-1 PS2495-3 PS2515-3 PS2659-2 PS2684-1 PS2697-1 PS2716-2 PS28 PS28/293 |
description |
Sr and Nd isotopic compositions of Late Quaternary surface sediment and sediment cores from the south Atlantic and southeast Pacific sectors of the Southern Ocean are used to constrain the provenance and transport mechanisms of their terrigenous component. We report isotopic and mineralogical data for core samples from three localities, the Mid-Atlantic Ridge at 41°S and the northern and southern Scotia Sea. In addition, data for surface sediment samples from the south Atlantic and southeast Pacific sectors of the Southern Ocean are presented. The variations of Sr and Nd isotopic compositions of the bulk sediment samples in all cores were correlated with the magnetic susceptibility of the sediment and with the inferred glacial-interglacial stages. The isotopic data indicate that, during glacial periods, sediment was delivered from continental crust with a shorter residence time than that supplying material during interglacial periods. At the core site near the Mid-Atlantic Ridge, Nd isotopic, combined with mineralogical evidence indicates interglacial period deposition of a relatively high amount of kaolinite and silt with low epsilon-Nd values < -8. The material was probably supplied by North Atlantic Deep Water from low latitudes. For glacial periods, a high contribution of silt and clay with epsilon-Nd > -4.5, probably derived from southern South America, was indicated. The glacial-interglacial shift in sources may be due to either a decreasing influence of North Atlantic Deep Water during glacial times or by a larger contribution of glaciogenic detritus from southern South America. At the core site in the northern Scotia Sea, sediment of interglacial periods is dominated by smectite with epsilon-Nd < - 6 and silt with epsilon-Nd > -4. We suggest that smectite was derived from the Falkland shelf and silt was derived from the Argentinian shelf. During glacial periods, the Argentinian shelf was an important source for silt and chlorite with epsilon-Nd > -4. The contribution from the Falkland ... |
format |
Dataset |
author |
Walter, Hans-Jürgen Hegner, Ernst Diekmann, Bernhard Kuhn, Gerhard Rutgers van der Loeff, Michiel M |
author_facet |
Walter, Hans-Jürgen Hegner, Ernst Diekmann, Bernhard Kuhn, Gerhard Rutgers van der Loeff, Michiel M |
author_sort |
Walter, Hans-Jürgen |
title |
Radionuclides of bulk and terrigenous surface sediments in the Southern Ocean |
title_short |
Radionuclides of bulk and terrigenous surface sediments in the Southern Ocean |
title_full |
Radionuclides of bulk and terrigenous surface sediments in the Southern Ocean |
title_fullStr |
Radionuclides of bulk and terrigenous surface sediments in the Southern Ocean |
title_full_unstemmed |
Radionuclides of bulk and terrigenous surface sediments in the Southern Ocean |
title_sort |
radionuclides of bulk and terrigenous surface sediments in the southern ocean |
publisher |
PANGAEA |
publishDate |
2000 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.735071 https://doi.org/10.1594/PANGAEA.735071 |
op_coverage |
MEDIAN LATITUDE: -51.865366 * MEDIAN LONGITUDE: -57.476007 * SOUTH-BOUND LATITUDE: -77.284790 * WEST-BOUND LONGITUDE: -95.024000 * NORTH-BOUND LATITUDE: -0.233333 * EAST-BOUND LONGITUDE: -14.490000 * DATE/TIME START: 1983-02-18T00:00:00 * DATE/TIME END: 1997-02-18T19:13:00 |
long_lat |
ENVELOPE(-36.000,-36.000,-77.000,-77.000) ENVELOPE(-95.024000,-14.490000,-0.233333,-77.284790) |
geographic |
Antarctic Southern Ocean Antarctic Peninsula Scotia Sea Pacific Mid-Atlantic Ridge Filchner Trough |
geographic_facet |
Antarctic Southern Ocean Antarctic Peninsula Scotia Sea Pacific Mid-Atlantic Ridge Filchner Trough |
genre |
Antarc* Antarctic Antarctic Peninsula North Atlantic Deep Water North Atlantic Scotia Sea Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula North Atlantic Deep Water North Atlantic Scotia Sea Southern Ocean |
op_source |
Supplement to: Walter, Hans-Jürgen; Hegner, Ernst; Diekmann, Bernhard; Kuhn, Gerhard; Rutgers van der Loeff, Michiel M (2000): Provenance and transport of terrigenous sediment in the South Atlantic Ocean and their relations to glacial and interglacial cycles: Nd and Sr isotopic evidence. Geochimica et Cosmochimica Acta, 64(22), 3813-3827, https://doi.org/10.1016/S0016-7037(00)00476-2 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.735071 https://doi.org/10.1594/PANGAEA.735071 |
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.735071 https://doi.org/10.1016/S0016-7037(00)00476-2 |
_version_ |
1766163702011133952 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.735071 2023-05-15T13:42:09+02:00 Radionuclides of bulk and terrigenous surface sediments in the Southern Ocean Walter, Hans-Jürgen Hegner, Ernst Diekmann, Bernhard Kuhn, Gerhard Rutgers van der Loeff, Michiel M MEDIAN LATITUDE: -51.865366 * MEDIAN LONGITUDE: -57.476007 * SOUTH-BOUND LATITUDE: -77.284790 * WEST-BOUND LONGITUDE: -95.024000 * NORTH-BOUND LATITUDE: -0.233333 * EAST-BOUND LONGITUDE: -14.490000 * DATE/TIME START: 1983-02-18T00:00:00 * DATE/TIME END: 1997-02-18T19:13:00 2000-03-15 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.735071 https://doi.org/10.1594/PANGAEA.735071 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.735071 https://doi.org/10.1594/PANGAEA.735071 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Walter, Hans-Jürgen; Hegner, Ernst; Diekmann, Bernhard; Kuhn, Gerhard; Rutgers van der Loeff, Michiel M (2000): Provenance and transport of terrigenous sediment in the South Atlantic Ocean and their relations to glacial and interglacial cycles: Nd and Sr isotopic evidence. Geochimica et Cosmochimica Acta, 64(22), 3813-3827, https://doi.org/10.1016/S0016-7037(00)00476-2 Antarctic Peninsula ANTARTIDA8611 ANT-I/2 ANT-V/4 ANT-VI/2 ANT-X/5 ANT-XI/2 ANT-XII/4 ANT-XIV/3 AWI_MarGeoChem AWI_Paleo BC Box corer D-ORC-015 Filchner Shelf Filchner Trough Giant box corer GKG Gravity corer (Kiel type) HAND KL Marine Geochemistry @ AWI MUC MultiCorer Nuevo Alcocero Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS01 PS01/177 PS10 PS10/738 PS1016-1 PS12 PS12/116 PS12/199 PS1490-2 PS1537-2 PS1563-1 PS22/817 PS22 06AQANTX_5 PS2319-1 PS2495-3 PS2515-3 PS2659-2 PS2684-1 PS2697-1 PS2716-2 PS28 PS28/293 Dataset 2000 ftpangaea https://doi.org/10.1594/PANGAEA.735071 https://doi.org/10.1016/S0016-7037(00)00476-2 2023-01-20T07:31:41Z Sr and Nd isotopic compositions of Late Quaternary surface sediment and sediment cores from the south Atlantic and southeast Pacific sectors of the Southern Ocean are used to constrain the provenance and transport mechanisms of their terrigenous component. We report isotopic and mineralogical data for core samples from three localities, the Mid-Atlantic Ridge at 41°S and the northern and southern Scotia Sea. In addition, data for surface sediment samples from the south Atlantic and southeast Pacific sectors of the Southern Ocean are presented. The variations of Sr and Nd isotopic compositions of the bulk sediment samples in all cores were correlated with the magnetic susceptibility of the sediment and with the inferred glacial-interglacial stages. The isotopic data indicate that, during glacial periods, sediment was delivered from continental crust with a shorter residence time than that supplying material during interglacial periods. At the core site near the Mid-Atlantic Ridge, Nd isotopic, combined with mineralogical evidence indicates interglacial period deposition of a relatively high amount of kaolinite and silt with low epsilon-Nd values < -8. The material was probably supplied by North Atlantic Deep Water from low latitudes. For glacial periods, a high contribution of silt and clay with epsilon-Nd > -4.5, probably derived from southern South America, was indicated. The glacial-interglacial shift in sources may be due to either a decreasing influence of North Atlantic Deep Water during glacial times or by a larger contribution of glaciogenic detritus from southern South America. At the core site in the northern Scotia Sea, sediment of interglacial periods is dominated by smectite with epsilon-Nd < - 6 and silt with epsilon-Nd > -4. We suggest that smectite was derived from the Falkland shelf and silt was derived from the Argentinian shelf. During glacial periods, the Argentinian shelf was an important source for silt and chlorite with epsilon-Nd > -4. The contribution from the Falkland ... Dataset Antarc* Antarctic Antarctic Peninsula North Atlantic Deep Water North Atlantic Scotia Sea Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean Antarctic Peninsula Scotia Sea Pacific Mid-Atlantic Ridge Filchner Trough ENVELOPE(-36.000,-36.000,-77.000,-77.000) ENVELOPE(-95.024000,-14.490000,-0.233333,-77.284790) |