Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - modern calibration and evaluation of palaeo-applications
© The Author(s), 2017. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Chemical Geology 453 (2017): 146–168, doi:10.1016/j.chemgeo.2017.01.022. Cold-water corals (CWCs) are unique archives of mid-depth ocean chemistry a...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/8938 2023-05-15T13:48:30+02:00 Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - modern calibration and evaluation of palaeo-applications Struve, Torben van de Flierdt, Tina Burke, Andrea Robinson, Laura F. Hammond, Samantha J. Crocket, Kirsty C. Bradtmiller, Louisa I. Auro, Maureen E. Mohamed, Kais J. White, Nicholas J. 2017-01-27 https://hdl.handle.net/1912/8938 en eng Elsevier https://doi.org/10.1016/j.chemgeo.2017.01.022 Chemical Geology 453 (2017): 146–168 https://hdl.handle.net/1912/8938 doi:10.1016/j.chemgeo.2017.01.022 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Chemical Geology 453 (2017): 146–168 doi:10.1016/j.chemgeo.2017.01.022 Neodymium isotopes Rare earth elements Cold-water corals Seawater Sediments Drake Passage Article 2017 ftwhoas https://doi.org/10.1016/j.chemgeo.2017.01.022 2022-05-28T22:59:54Z © The Author(s), 2017. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Chemical Geology 453 (2017): 146–168, doi:10.1016/j.chemgeo.2017.01.022. Cold-water corals (CWCs) are unique archives of mid-depth ocean chemistry and have been used successfully to reconstruct the neodymium (Nd) isotopic composition of seawater from a number of species. High and variable Nd concentrations in fossil corals however pose the question as to how Nd is incorporated into their skeletons. We here present new results on modern specimens of Desmophyllum dianthus, Balanophyllia malouinensis, and Flabellum curvatum, collected from the Drake Passage, and Madrepora oculata, collected from the North Atlantic. All modern individuals were either collected alive or uranium-series dated to be < 500 years old for comparison with local surface sediments and seawater profiles. Modern coral Nd isotopic compositions generally agree with ambient seawater values, which in turn are consistent with previously published seawater analyses, supporting small vertical and lateral Nd isotope gradients in modern Drake Passage waters. Two Balanophyllia malouinensis specimens collected live however deviate by up to 0.6 epsilon units from ambient seawater. We therefore recommend that this species should be treated with caution for the reconstruction of past seawater Nd isotopic compositions. Seventy fossil Drake Passage CWCs were furthermore analysed for their Nd concentrations, revealing a large range from 7.3 to 964.5 ng/g. Samples of the species D. dianthus and Caryophyllia spp. show minor covariation of Nd with 232Th content, utilised to monitor contaminant phases in cleaned coral aragonite. Strong covariations between Nd and Th concentrations are however observed in the species B. malouinensis and G. antarctica. In order to better constrain the source and nature of Nd in the cleaned aragonitic skeletons, a subset of sixteen corals was investigated for its rare earth ... Article in Journal/Newspaper Antarc* Antarctica Drake Passage North Atlantic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Drake Passage Chemical Geology 453 146 168 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Neodymium isotopes Rare earth elements Cold-water corals Seawater Sediments Drake Passage |
spellingShingle |
Neodymium isotopes Rare earth elements Cold-water corals Seawater Sediments Drake Passage Struve, Torben van de Flierdt, Tina Burke, Andrea Robinson, Laura F. Hammond, Samantha J. Crocket, Kirsty C. Bradtmiller, Louisa I. Auro, Maureen E. Mohamed, Kais J. White, Nicholas J. Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - modern calibration and evaluation of palaeo-applications |
topic_facet |
Neodymium isotopes Rare earth elements Cold-water corals Seawater Sediments Drake Passage |
description |
© The Author(s), 2017. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Chemical Geology 453 (2017): 146–168, doi:10.1016/j.chemgeo.2017.01.022. Cold-water corals (CWCs) are unique archives of mid-depth ocean chemistry and have been used successfully to reconstruct the neodymium (Nd) isotopic composition of seawater from a number of species. High and variable Nd concentrations in fossil corals however pose the question as to how Nd is incorporated into their skeletons. We here present new results on modern specimens of Desmophyllum dianthus, Balanophyllia malouinensis, and Flabellum curvatum, collected from the Drake Passage, and Madrepora oculata, collected from the North Atlantic. All modern individuals were either collected alive or uranium-series dated to be < 500 years old for comparison with local surface sediments and seawater profiles. Modern coral Nd isotopic compositions generally agree with ambient seawater values, which in turn are consistent with previously published seawater analyses, supporting small vertical and lateral Nd isotope gradients in modern Drake Passage waters. Two Balanophyllia malouinensis specimens collected live however deviate by up to 0.6 epsilon units from ambient seawater. We therefore recommend that this species should be treated with caution for the reconstruction of past seawater Nd isotopic compositions. Seventy fossil Drake Passage CWCs were furthermore analysed for their Nd concentrations, revealing a large range from 7.3 to 964.5 ng/g. Samples of the species D. dianthus and Caryophyllia spp. show minor covariation of Nd with 232Th content, utilised to monitor contaminant phases in cleaned coral aragonite. Strong covariations between Nd and Th concentrations are however observed in the species B. malouinensis and G. antarctica. In order to better constrain the source and nature of Nd in the cleaned aragonitic skeletons, a subset of sixteen corals was investigated for its rare earth ... |
format |
Article in Journal/Newspaper |
author |
Struve, Torben van de Flierdt, Tina Burke, Andrea Robinson, Laura F. Hammond, Samantha J. Crocket, Kirsty C. Bradtmiller, Louisa I. Auro, Maureen E. Mohamed, Kais J. White, Nicholas J. |
author_facet |
Struve, Torben van de Flierdt, Tina Burke, Andrea Robinson, Laura F. Hammond, Samantha J. Crocket, Kirsty C. Bradtmiller, Louisa I. Auro, Maureen E. Mohamed, Kais J. White, Nicholas J. |
author_sort |
Struve, Torben |
title |
Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - modern calibration and evaluation of palaeo-applications |
title_short |
Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - modern calibration and evaluation of palaeo-applications |
title_full |
Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - modern calibration and evaluation of palaeo-applications |
title_fullStr |
Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - modern calibration and evaluation of palaeo-applications |
title_full_unstemmed |
Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - modern calibration and evaluation of palaeo-applications |
title_sort |
neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - modern calibration and evaluation of palaeo-applications |
publisher |
Elsevier |
publishDate |
2017 |
url |
https://hdl.handle.net/1912/8938 |
geographic |
Drake Passage |
geographic_facet |
Drake Passage |
genre |
Antarc* Antarctica Drake Passage North Atlantic |
genre_facet |
Antarc* Antarctica Drake Passage North Atlantic |
op_source |
Chemical Geology 453 (2017): 146–168 doi:10.1016/j.chemgeo.2017.01.022 |
op_relation |
https://doi.org/10.1016/j.chemgeo.2017.01.022 Chemical Geology 453 (2017): 146–168 https://hdl.handle.net/1912/8938 doi:10.1016/j.chemgeo.2017.01.022 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.chemgeo.2017.01.022 |
container_title |
Chemical Geology |
container_volume |
453 |
container_start_page |
146 |
op_container_end_page |
168 |
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1766249342532845568 |