(Table 1) Sample locations, Hf and Nd isotopic compositions and concentrations of Atlantic seawater samples with hydrographic details
The first full water column hafnium isotopic compositions of Atlantic seawater have been obtained at seven locations from the Labrador Sea to the Drake Passage. Despite subpicomolar concentrations in seawater, a precision of the Hf isotopic measurements of <0.7 epsilon-Hf units was achieved. An o...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.715003 2023-05-15T13:42:09+02:00 (Table 1) Sample locations, Hf and Nd isotopic compositions and concentrations of Atlantic seawater samples with hydrographic details Rickli, Jörg Dominik Frank, Martin Halliday, Alex N MEDIAN LATITUDE: 17.886158 * MEDIAN LONGITUDE: -37.872652 * SOUTH-BOUND LATITUDE: -56.933000 * WEST-BOUND LONGITUDE: -63.302900 * NORTH-BOUND LATITUDE: 54.246000 * EAST-BOUND LONGITUDE: 8.281400 * DATE/TIME START: 2005-07-23T20:11:00 * DATE/TIME END: 2006-02-04T22:31:00 2009-05-12 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.715003 https://doi.org/10.1594/PANGAEA.715003 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.715003 https://doi.org/10.1594/PANGAEA.715003 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Rickli, Jörg Dominik; Frank, Martin; Halliday, Alex N (2009): The hafnium-neodymium isotopic composition of Atlantic seawater. Earth and Planetary Science Letters, 280(1-4), 118-127, https://doi.org/10.1016/j.epsl.2009.01.026 ANT-XXIII/1 ANT-XXIII/3 Bay of Biscay Canarias Sea CTD/Rosette CTD-RO GOFLO Go-Flo bottles North Atlantic Ocean Polarstern PS69 PS69/003-1 PS69/006-1 PS69/011-1 PS69/018-1 PS69/021-1 PS69/026-1 PS69/140-2 PS69/224-1 South Atlantic Ocean Tha15 Thalassa WNA05 WNA05_15 Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.715003 https://doi.org/10.1016/j.epsl.2009.01.026 2023-01-20T07:31:24Z The first full water column hafnium isotopic compositions of Atlantic seawater have been obtained at seven locations from the Labrador Sea to the Drake Passage. Despite subpicomolar concentrations in seawater, a precision of the Hf isotopic measurements of <0.7 epsilon-Hf units was achieved. An overall epsilon-Hf range between -3.1 in the Labrador Sea and +4.4 in Antarctic bottom water was determined, the distribution of which broadly reflects continental weathering inputs. Within particular water column profiles, significant differences of up to 4 epsilon-Hf units occur. Combined with Nd isotope data of the same samples, it is evident that the Hf isotopic composition of seawater is too radiogenic for a given Nd isotopic composition and that the largest difference between expected and measured Hf isotopic compositions in seawater occurs near the oldest continental crust in the Labrador Sea. This corroborates the previous proposition, which was mainly based on ferromanganese crust data, that the Hf isotopic composition of seawater is controlled by incongruent weathering of continental crust and possibly, to some extent, by hydrothermal contributions. Hafnium concentrations in the ocean do not increase along the deep ocean conveyer indicating an oceanic residence time of only a few hundred years, which is significantly shorter than previously assumed. The Hf isotopic composition of past seawater can therefore serve as a proxy for short distance, basin scale mixing processes and the regime and intensity of nearby continental weathering processes. Dataset Antarc* Antarctic Drake Passage Labrador Sea North Atlantic South Atlantic Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Drake Passage ENVELOPE(-63.302900,8.281400,54.246000,-56.933000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-XXIII/1 ANT-XXIII/3 Bay of Biscay Canarias Sea CTD/Rosette CTD-RO GOFLO Go-Flo bottles North Atlantic Ocean Polarstern PS69 PS69/003-1 PS69/006-1 PS69/011-1 PS69/018-1 PS69/021-1 PS69/026-1 PS69/140-2 PS69/224-1 South Atlantic Ocean Tha15 Thalassa WNA05 WNA05_15 |
spellingShingle |
ANT-XXIII/1 ANT-XXIII/3 Bay of Biscay Canarias Sea CTD/Rosette CTD-RO GOFLO Go-Flo bottles North Atlantic Ocean Polarstern PS69 PS69/003-1 PS69/006-1 PS69/011-1 PS69/018-1 PS69/021-1 PS69/026-1 PS69/140-2 PS69/224-1 South Atlantic Ocean Tha15 Thalassa WNA05 WNA05_15 Rickli, Jörg Dominik Frank, Martin Halliday, Alex N (Table 1) Sample locations, Hf and Nd isotopic compositions and concentrations of Atlantic seawater samples with hydrographic details |
topic_facet |
ANT-XXIII/1 ANT-XXIII/3 Bay of Biscay Canarias Sea CTD/Rosette CTD-RO GOFLO Go-Flo bottles North Atlantic Ocean Polarstern PS69 PS69/003-1 PS69/006-1 PS69/011-1 PS69/018-1 PS69/021-1 PS69/026-1 PS69/140-2 PS69/224-1 South Atlantic Ocean Tha15 Thalassa WNA05 WNA05_15 |
description |
The first full water column hafnium isotopic compositions of Atlantic seawater have been obtained at seven locations from the Labrador Sea to the Drake Passage. Despite subpicomolar concentrations in seawater, a precision of the Hf isotopic measurements of <0.7 epsilon-Hf units was achieved. An overall epsilon-Hf range between -3.1 in the Labrador Sea and +4.4 in Antarctic bottom water was determined, the distribution of which broadly reflects continental weathering inputs. Within particular water column profiles, significant differences of up to 4 epsilon-Hf units occur. Combined with Nd isotope data of the same samples, it is evident that the Hf isotopic composition of seawater is too radiogenic for a given Nd isotopic composition and that the largest difference between expected and measured Hf isotopic compositions in seawater occurs near the oldest continental crust in the Labrador Sea. This corroborates the previous proposition, which was mainly based on ferromanganese crust data, that the Hf isotopic composition of seawater is controlled by incongruent weathering of continental crust and possibly, to some extent, by hydrothermal contributions. Hafnium concentrations in the ocean do not increase along the deep ocean conveyer indicating an oceanic residence time of only a few hundred years, which is significantly shorter than previously assumed. The Hf isotopic composition of past seawater can therefore serve as a proxy for short distance, basin scale mixing processes and the regime and intensity of nearby continental weathering processes. |
format |
Dataset |
author |
Rickli, Jörg Dominik Frank, Martin Halliday, Alex N |
author_facet |
Rickli, Jörg Dominik Frank, Martin Halliday, Alex N |
author_sort |
Rickli, Jörg Dominik |
title |
(Table 1) Sample locations, Hf and Nd isotopic compositions and concentrations of Atlantic seawater samples with hydrographic details |
title_short |
(Table 1) Sample locations, Hf and Nd isotopic compositions and concentrations of Atlantic seawater samples with hydrographic details |
title_full |
(Table 1) Sample locations, Hf and Nd isotopic compositions and concentrations of Atlantic seawater samples with hydrographic details |
title_fullStr |
(Table 1) Sample locations, Hf and Nd isotopic compositions and concentrations of Atlantic seawater samples with hydrographic details |
title_full_unstemmed |
(Table 1) Sample locations, Hf and Nd isotopic compositions and concentrations of Atlantic seawater samples with hydrographic details |
title_sort |
(table 1) sample locations, hf and nd isotopic compositions and concentrations of atlantic seawater samples with hydrographic details |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.715003 https://doi.org/10.1594/PANGAEA.715003 |
op_coverage |
MEDIAN LATITUDE: 17.886158 * MEDIAN LONGITUDE: -37.872652 * SOUTH-BOUND LATITUDE: -56.933000 * WEST-BOUND LONGITUDE: -63.302900 * NORTH-BOUND LATITUDE: 54.246000 * EAST-BOUND LONGITUDE: 8.281400 * DATE/TIME START: 2005-07-23T20:11:00 * DATE/TIME END: 2006-02-04T22:31:00 |
long_lat |
ENVELOPE(-63.302900,8.281400,54.246000,-56.933000) |
geographic |
Antarctic Drake Passage |
geographic_facet |
Antarctic Drake Passage |
genre |
Antarc* Antarctic Drake Passage Labrador Sea North Atlantic South Atlantic Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Labrador Sea North Atlantic South Atlantic Ocean |
op_source |
Supplement to: Rickli, Jörg Dominik; Frank, Martin; Halliday, Alex N (2009): The hafnium-neodymium isotopic composition of Atlantic seawater. Earth and Planetary Science Letters, 280(1-4), 118-127, https://doi.org/10.1016/j.epsl.2009.01.026 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.715003 https://doi.org/10.1594/PANGAEA.715003 |
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.715003 https://doi.org/10.1016/j.epsl.2009.01.026 |
_version_ |
1766163467949047808 |