Nd isotopes of ODP Sites 146-893 and 167-1017 samples, supplement to: Murphy, Daniel P; Thomas, Deborah J (2010): The negligible role of intermediate water circulation in stadial–interstadial oxygenation variations along the southern California margin: Evidence from Nd isotopes. Quaternary Science Reviews, 29(19-20), 2442-2450
Changes in the source of intermediate waters to the southern California margin may have caused variations in seafloor oxygen levels on stadial–interstadial time scales. We test this hypothesis using the Nd isotopic composition of benthic foraminifera and fossil fish debris from ODP Sites 893 and 101...
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Online Access: | https://dx.doi.org/10.1594/pangaea.816402 https://doi.pangaea.de/10.1594/PANGAEA.816402 |
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ftdatacite:10.1594/pangaea.816402 2023-05-15T18:25:09+02:00 Nd isotopes of ODP Sites 146-893 and 167-1017 samples, supplement to: Murphy, Daniel P; Thomas, Deborah J (2010): The negligible role of intermediate water circulation in stadial–interstadial oxygenation variations along the southern California margin: Evidence from Nd isotopes. Quaternary Science Reviews, 29(19-20), 2442-2450 Murphy, Daniel P Thomas, Deborah J 2013 application/zip https://dx.doi.org/10.1594/pangaea.816402 https://doi.pangaea.de/10.1594/PANGAEA.816402 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.quascirev.2010.05.021 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 2013 ftdatacite https://doi.org/10.1594/pangaea.816402 https://doi.org/10.1016/j.quascirev.2010.05.021 2022-02-08T16:02:21Z Changes in the source of intermediate waters to the southern California margin may have caused variations in seafloor oxygen levels on stadial–interstadial time scales. We test this hypothesis using the Nd isotopic composition of benthic foraminifera and fossil fish debris from ODP Sites 893 and 1017 to track the composition of intermediate waters across interstadials 8-14 (~37-52 ka) during Marine Isotope Stage 3. The epsilon-Nd values of waters bathing the seafloor at Site 893 were typically ~-9 and those bathing Site 1017 were ~-7, both of which are significantly less radiogenic than waters that had originated in either the North Pacific or Southern Ocean (by the time such waters reached the southern California margin). Detrital silicate epsilon-Nd values of nearly -12 suggest that this offset toward lower epsilon-Nd values was likely caused by boundary scavenging that partially overprinted the water mass composition with local/regional fluvial Nd inputs. In spite of the evidence for boundary scavenging, the lack of systematic seawater Nd isotope changes on a stadial–interstadial basis suggests that the provenance of the intermediate waters did not change, and that the waters were derived from the Southern Ocean. Instead, changes in local/regional sea surface productivity may have caused the recorded changes in seafloor oxygenation. Article in Journal/Newspaper Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Southern Ocean Pacific |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Ocean Drilling Program ODP |
spellingShingle |
Ocean Drilling Program ODP Murphy, Daniel P Thomas, Deborah J Nd isotopes of ODP Sites 146-893 and 167-1017 samples, supplement to: Murphy, Daniel P; Thomas, Deborah J (2010): The negligible role of intermediate water circulation in stadial–interstadial oxygenation variations along the southern California margin: Evidence from Nd isotopes. Quaternary Science Reviews, 29(19-20), 2442-2450 |
topic_facet |
Ocean Drilling Program ODP |
description |
Changes in the source of intermediate waters to the southern California margin may have caused variations in seafloor oxygen levels on stadial–interstadial time scales. We test this hypothesis using the Nd isotopic composition of benthic foraminifera and fossil fish debris from ODP Sites 893 and 1017 to track the composition of intermediate waters across interstadials 8-14 (~37-52 ka) during Marine Isotope Stage 3. The epsilon-Nd values of waters bathing the seafloor at Site 893 were typically ~-9 and those bathing Site 1017 were ~-7, both of which are significantly less radiogenic than waters that had originated in either the North Pacific or Southern Ocean (by the time such waters reached the southern California margin). Detrital silicate epsilon-Nd values of nearly -12 suggest that this offset toward lower epsilon-Nd values was likely caused by boundary scavenging that partially overprinted the water mass composition with local/regional fluvial Nd inputs. In spite of the evidence for boundary scavenging, the lack of systematic seawater Nd isotope changes on a stadial–interstadial basis suggests that the provenance of the intermediate waters did not change, and that the waters were derived from the Southern Ocean. Instead, changes in local/regional sea surface productivity may have caused the recorded changes in seafloor oxygenation. |
format |
Article in Journal/Newspaper |
author |
Murphy, Daniel P Thomas, Deborah J |
author_facet |
Murphy, Daniel P Thomas, Deborah J |
author_sort |
Murphy, Daniel P |
title |
Nd isotopes of ODP Sites 146-893 and 167-1017 samples, supplement to: Murphy, Daniel P; Thomas, Deborah J (2010): The negligible role of intermediate water circulation in stadial–interstadial oxygenation variations along the southern California margin: Evidence from Nd isotopes. Quaternary Science Reviews, 29(19-20), 2442-2450 |
title_short |
Nd isotopes of ODP Sites 146-893 and 167-1017 samples, supplement to: Murphy, Daniel P; Thomas, Deborah J (2010): The negligible role of intermediate water circulation in stadial–interstadial oxygenation variations along the southern California margin: Evidence from Nd isotopes. Quaternary Science Reviews, 29(19-20), 2442-2450 |
title_full |
Nd isotopes of ODP Sites 146-893 and 167-1017 samples, supplement to: Murphy, Daniel P; Thomas, Deborah J (2010): The negligible role of intermediate water circulation in stadial–interstadial oxygenation variations along the southern California margin: Evidence from Nd isotopes. Quaternary Science Reviews, 29(19-20), 2442-2450 |
title_fullStr |
Nd isotopes of ODP Sites 146-893 and 167-1017 samples, supplement to: Murphy, Daniel P; Thomas, Deborah J (2010): The negligible role of intermediate water circulation in stadial–interstadial oxygenation variations along the southern California margin: Evidence from Nd isotopes. Quaternary Science Reviews, 29(19-20), 2442-2450 |
title_full_unstemmed |
Nd isotopes of ODP Sites 146-893 and 167-1017 samples, supplement to: Murphy, Daniel P; Thomas, Deborah J (2010): The negligible role of intermediate water circulation in stadial–interstadial oxygenation variations along the southern California margin: Evidence from Nd isotopes. Quaternary Science Reviews, 29(19-20), 2442-2450 |
title_sort |
nd isotopes of odp sites 146-893 and 167-1017 samples, supplement to: murphy, daniel p; thomas, deborah j (2010): the negligible role of intermediate water circulation in stadial–interstadial oxygenation variations along the southern california margin: evidence from nd isotopes. quaternary science reviews, 29(19-20), 2442-2450 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2013 |
url |
https://dx.doi.org/10.1594/pangaea.816402 https://doi.pangaea.de/10.1594/PANGAEA.816402 |
geographic |
Southern Ocean Pacific |
geographic_facet |
Southern Ocean Pacific |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://dx.doi.org/10.1016/j.quascirev.2010.05.021 |
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.816402 https://doi.org/10.1016/j.quascirev.2010.05.021 |
_version_ |
1766206385729568768 |