Strontium and neodymium concentrations and isotopic compositions of Arctic marine sediments
Sr and Nd isotopic compositions of Arctic marine sediments characterize changes of sediment source regions and trace shelf-ocean particle pathways during glacial-interglacial transitions in the eastern Arctic Ocean. In the 140-ka sedimentary record of a marine core from Yermak Plateau, north of Sval...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.774351 2023-05-15T13:42:10+02:00 Strontium and neodymium concentrations and isotopic compositions of Arctic marine sediments Tütken, Thomas Eisenhauer, Anton Wiegand, Bettina Hansen, Bent T MEDIAN LATITUDE: 79.896378 * MEDIAN LONGITUDE: 39.252088 * SOUTH-BOUND LATITUDE: 71.943600 * WEST-BOUND LONGITUDE: 6.876700 * NORTH-BOUND LATITUDE: 82.500000 * EAST-BOUND LONGITUDE: 149.000000 * DATE/TIME START: 1987-08-16T00:00:00 * DATE/TIME END: 1987-08-16T00:00:00 2002-01-19 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.774351 https://doi.org/10.1594/PANGAEA.774351 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.774351 https://doi.org/10.1594/PANGAEA.774351 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Tütken, Thomas; Eisenhauer, Anton; Wiegand, Bettina; Hansen, Bent T (2002): Glacial-interglacial cycles in Sr and Nd isotopic composition of Arctic marine sediments triggered by the Svalbard/Barents Sea ice sheet. Marine Geology, 182(3-4), 351-372, https://doi.org/10.1016/S0025-3227(01)00248-1 Antarctic Ocean ARK-IV/3 GIK21533-3 PS11/412 Gravity corer (Kiel type) Polarstern PS11 PS1533-3 SL Dataset 2002 ftpangaea https://doi.org/10.1594/PANGAEA.774351 https://doi.org/10.1016/S0025-3227(01)00248-1 2023-01-20T07:32:23Z Sr and Nd isotopic compositions of Arctic marine sediments characterize changes of sediment source regions and trace shelf-ocean particle pathways during glacial-interglacial transitions in the eastern Arctic Ocean. In the 140-ka sedimentary record of a marine core from Yermak Plateau, north of Svalbard, 87Sr/86Sr ratios and epsion-Nd values vary between 0.717 and 0.740 and 39.3 and 314.9, respectively. Sr and Nd isotopic composition both change characteristically during glacial-interglacial cycles and are correlated with the extension of the Svalbard/Barents Sea ice sheet (SBIS). The downcore variation in Sr and Nd isotopic composition indicates climatically induced changes in sediment provenance from two isotopically distinct end-members: (1) Eurasian shelf sediments as a distal source; and (2) Svalbard bedrock as a proximal source that coincide with a change in transport mechanism from sea ice to glacial ice. During glacier advance from Svalbard and intensified glacial bedrock erosion, epsion-Nd values decrease gradually to a minimum value of 314.9 due to increased input of crystalline Svalbard bedrock material. During glacial maxima, the SBIS covered the entire Barents Sea shelf and supplied increasing amounts of Eurasian shelf material to the Arctic Ocean as ice rafted detritus (IRD). Epsion-Nd values in glacial sediments reach maximum values that are comparable to the average value of modern Eurasian shelf and sea ice sediments (epsion-Nd = 310.3). This confirms ice rafting as a major sediment transport mechanism for Eurasian shelf sediments into the Arctic Ocean and trace a sediment origin from the Kara Sea/Laptev Sea shelf area. After the decay of the shelf-based SBIS, the glacial shelf sediment spikes during glacial terminations I (epsion-Nd = 310.6) and II (epsion-Nd = 310.1) epsion-Nd values rapidly decrease to values of 312.5 typical for interglacial averages. The downcore Sr isotopic composition is anticorrelated to the Nd isotopic composition, but may be also influenced by grain-size effects. In ... Dataset Antarc* Antarctic Antarctic Ocean Arctic Arctic Arctic Ocean Barents Sea glacier Ice Sheet Kara Sea laptev Laptev Sea Sea ice Svalbard Svalbard-Barents Sea Ice sheet Yermak plateau PANGAEA - Data Publisher for Earth & Environmental Science Arctic Antarctic Arctic Ocean Svalbard Barents Sea Laptev Sea Kara Sea Antarctic Ocean Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) ENVELOPE(6.876700,149.000000,82.500000,71.943600) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Antarctic Ocean ARK-IV/3 GIK21533-3 PS11/412 Gravity corer (Kiel type) Polarstern PS11 PS1533-3 SL |
spellingShingle |
Antarctic Ocean ARK-IV/3 GIK21533-3 PS11/412 Gravity corer (Kiel type) Polarstern PS11 PS1533-3 SL Tütken, Thomas Eisenhauer, Anton Wiegand, Bettina Hansen, Bent T Strontium and neodymium concentrations and isotopic compositions of Arctic marine sediments |
topic_facet |
Antarctic Ocean ARK-IV/3 GIK21533-3 PS11/412 Gravity corer (Kiel type) Polarstern PS11 PS1533-3 SL |
description |
Sr and Nd isotopic compositions of Arctic marine sediments characterize changes of sediment source regions and trace shelf-ocean particle pathways during glacial-interglacial transitions in the eastern Arctic Ocean. In the 140-ka sedimentary record of a marine core from Yermak Plateau, north of Svalbard, 87Sr/86Sr ratios and epsion-Nd values vary between 0.717 and 0.740 and 39.3 and 314.9, respectively. Sr and Nd isotopic composition both change characteristically during glacial-interglacial cycles and are correlated with the extension of the Svalbard/Barents Sea ice sheet (SBIS). The downcore variation in Sr and Nd isotopic composition indicates climatically induced changes in sediment provenance from two isotopically distinct end-members: (1) Eurasian shelf sediments as a distal source; and (2) Svalbard bedrock as a proximal source that coincide with a change in transport mechanism from sea ice to glacial ice. During glacier advance from Svalbard and intensified glacial bedrock erosion, epsion-Nd values decrease gradually to a minimum value of 314.9 due to increased input of crystalline Svalbard bedrock material. During glacial maxima, the SBIS covered the entire Barents Sea shelf and supplied increasing amounts of Eurasian shelf material to the Arctic Ocean as ice rafted detritus (IRD). Epsion-Nd values in glacial sediments reach maximum values that are comparable to the average value of modern Eurasian shelf and sea ice sediments (epsion-Nd = 310.3). This confirms ice rafting as a major sediment transport mechanism for Eurasian shelf sediments into the Arctic Ocean and trace a sediment origin from the Kara Sea/Laptev Sea shelf area. After the decay of the shelf-based SBIS, the glacial shelf sediment spikes during glacial terminations I (epsion-Nd = 310.6) and II (epsion-Nd = 310.1) epsion-Nd values rapidly decrease to values of 312.5 typical for interglacial averages. The downcore Sr isotopic composition is anticorrelated to the Nd isotopic composition, but may be also influenced by grain-size effects. In ... |
format |
Dataset |
author |
Tütken, Thomas Eisenhauer, Anton Wiegand, Bettina Hansen, Bent T |
author_facet |
Tütken, Thomas Eisenhauer, Anton Wiegand, Bettina Hansen, Bent T |
author_sort |
Tütken, Thomas |
title |
Strontium and neodymium concentrations and isotopic compositions of Arctic marine sediments |
title_short |
Strontium and neodymium concentrations and isotopic compositions of Arctic marine sediments |
title_full |
Strontium and neodymium concentrations and isotopic compositions of Arctic marine sediments |
title_fullStr |
Strontium and neodymium concentrations and isotopic compositions of Arctic marine sediments |
title_full_unstemmed |
Strontium and neodymium concentrations and isotopic compositions of Arctic marine sediments |
title_sort |
strontium and neodymium concentrations and isotopic compositions of arctic marine sediments |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.774351 https://doi.org/10.1594/PANGAEA.774351 |
op_coverage |
MEDIAN LATITUDE: 79.896378 * MEDIAN LONGITUDE: 39.252088 * SOUTH-BOUND LATITUDE: 71.943600 * WEST-BOUND LONGITUDE: 6.876700 * NORTH-BOUND LATITUDE: 82.500000 * EAST-BOUND LONGITUDE: 149.000000 * DATE/TIME START: 1987-08-16T00:00:00 * DATE/TIME END: 1987-08-16T00:00:00 |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) ENVELOPE(6.876700,149.000000,82.500000,71.943600) |
geographic |
Arctic Antarctic Arctic Ocean Svalbard Barents Sea Laptev Sea Kara Sea Antarctic Ocean Yermak Plateau |
geographic_facet |
Arctic Antarctic Arctic Ocean Svalbard Barents Sea Laptev Sea Kara Sea Antarctic Ocean Yermak Plateau |
genre |
Antarc* Antarctic Antarctic Ocean Arctic Arctic Arctic Ocean Barents Sea glacier Ice Sheet Kara Sea laptev Laptev Sea Sea ice Svalbard Svalbard-Barents Sea Ice sheet Yermak plateau |
genre_facet |
Antarc* Antarctic Antarctic Ocean Arctic Arctic Arctic Ocean Barents Sea glacier Ice Sheet Kara Sea laptev Laptev Sea Sea ice Svalbard Svalbard-Barents Sea Ice sheet Yermak plateau |
op_source |
Supplement to: Tütken, Thomas; Eisenhauer, Anton; Wiegand, Bettina; Hansen, Bent T (2002): Glacial-interglacial cycles in Sr and Nd isotopic composition of Arctic marine sediments triggered by the Svalbard/Barents Sea ice sheet. Marine Geology, 182(3-4), 351-372, https://doi.org/10.1016/S0025-3227(01)00248-1 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.774351 https://doi.org/10.1594/PANGAEA.774351 |
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.774351 https://doi.org/10.1016/S0025-3227(01)00248-1 |
_version_ |
1766164181815394304 |