Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - Modern calibration and evaluation of palaeo-applications
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 incorp...
Published in: | Chemical Geology |
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2017
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/neodymium-isotopes-and-concentrations-in-aragonitic-scleractinian-coldwater-coral-skeletons--modern-calibration-and-evaluation-of-palaeoapplications(2db99420-5ae4-460a-8aea-fc1ae3b018ad).html https://doi.org/10.1016/j.chemgeo.2017.01.022 https://research-repository.st-andrews.ac.uk/bitstream/10023/10384/1/Burke_2017_CG_AragoniticScleractinian_CC.pdf |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/2db99420-5ae4-460a-8aea-fc1ae3b018ad 2024-09-15T17:48:39+00:00 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. 2017-03-20 application/pdf https://research-portal.st-andrews.ac.uk/en/researchoutput/neodymium-isotopes-and-concentrations-in-aragonitic-scleractinian-coldwater-coral-skeletons--modern-calibration-and-evaluation-of-palaeoapplications(2db99420-5ae4-460a-8aea-fc1ae3b018ad).html https://doi.org/10.1016/j.chemgeo.2017.01.022 https://research-repository.st-andrews.ac.uk/bitstream/10023/10384/1/Burke_2017_CG_AragoniticScleractinian_CC.pdf eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/neodymium-isotopes-and-concentrations-in-aragonitic-scleractinian-coldwater-coral-skeletons--modern-calibration-and-evaluation-of-palaeoapplications(2db99420-5ae4-460a-8aea-fc1ae3b018ad).html info:eu-repo/semantics/openAccess Struve , T , van de Flierdt , T , Burke , A , Robinson , L F , Hammond , S J , Crocket , K C , Bradtmiller , L I , Auro , M E , Mohamed , K J & White , N J 2017 , ' Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - Modern calibration and evaluation of palaeo-applications ' , Chemical Geology , vol. 453 , pp. 146-168 . https://doi.org/10.1016/j.chemgeo.2017.01.022 Neodymium isotopes Rare earth elements Cold-water corals Seawater Sediments Drake Passage article 2017 ftunstandrewcris https://doi.org/10.1016/j.chemgeo.2017.01.022 2024-07-31T23:33:09Z 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 232 Th 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 element (REE) content, as well as major and trace element geochemistry. Our new data provide supporting evidence that the applied cleaning protocol efficiently removes contaminant lithogenic and ferromanganese oxyhydroxide ... Article in Journal/Newspaper Antarc* Antarctica Drake Passage North Atlantic University of St Andrews: Research Portal Chemical Geology 453 146 168 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
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 |
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 232 Th 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 element (REE) content, as well as major and trace element geochemistry. Our new data provide supporting evidence that the applied cleaning protocol efficiently removes contaminant lithogenic and ferromanganese oxyhydroxide ... |
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 |
publishDate |
2017 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/neodymium-isotopes-and-concentrations-in-aragonitic-scleractinian-coldwater-coral-skeletons--modern-calibration-and-evaluation-of-palaeoapplications(2db99420-5ae4-460a-8aea-fc1ae3b018ad).html https://doi.org/10.1016/j.chemgeo.2017.01.022 https://research-repository.st-andrews.ac.uk/bitstream/10023/10384/1/Burke_2017_CG_AragoniticScleractinian_CC.pdf |
genre |
Antarc* Antarctica Drake Passage North Atlantic |
genre_facet |
Antarc* Antarctica Drake Passage North Atlantic |
op_source |
Struve , T , van de Flierdt , T , Burke , A , Robinson , L F , Hammond , S J , Crocket , K C , Bradtmiller , L I , Auro , M E , Mohamed , K J & White , N J 2017 , ' Neodymium isotopes and concentrations in aragonitic scleractinian cold-water coral skeletons - Modern calibration and evaluation of palaeo-applications ' , Chemical Geology , vol. 453 , pp. 146-168 . https://doi.org/10.1016/j.chemgeo.2017.01.022 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/neodymium-isotopes-and-concentrations-in-aragonitic-scleractinian-coldwater-coral-skeletons--modern-calibration-and-evaluation-of-palaeoapplications(2db99420-5ae4-460a-8aea-fc1ae3b018ad).html |
op_rights |
info:eu-repo/semantics/openAccess |
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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1810290130881085440 |