Boron isotopes as pH proxy: A new look at boron speciation in deep-sea corals using 11B MAS NMR and EELS
Dissolved boron in modern seawater occurs in the form of two species, trigonal boric acid B(OH)(3) and tetrahedral borate ion B(OH)(4)(-). One of the key assumption in the use of boron isotopic compositions of carbonates as pH proxy is that only borate ions, B(OH)(4)(-), are incorporated into the ca...
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ftunivlilleoa:oai:lilloa.univ-lille.fr:20.500.12210/7950 2023-05-15T17:08:42+02:00 Boron isotopes as pH proxy: A new look at boron speciation in deep-sea corals using 11B MAS NMR and EELS Rollion-Bard, Claire Blamart, Dominique Trebosc, Julien Tricot, Grégory Mussi, Alexandre Cuif, Jean-Pierre Université de Lille ENSCL CNRS INRA Centre de Recherches Pétrographiques et Géochimiques CRPG Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette LSCE Unité de Catalyse et Chimie du Solide - UMR 8181 UCCS Unité Matériaux et Transformations - UMR 8207 UMET Interactions et dynamique des environnements de surface IDES 2021-06-24T13:43:52Z https://hdl.handle.net/20.500.12210/7950 Anglais eng 10.1016/j.gca.2010.11.023 Geochimica et Cosmochimica Acta http://hdl.handle.net/20.500.12210/7950 info:eu-repo/semantics/closedAccess Article dans une revue scientifique 2021 ftunivlilleoa https://doi.org/20.500.12210/7950 2023-01-08T19:02:55Z Dissolved boron in modern seawater occurs in the form of two species, trigonal boric acid B(OH)(3) and tetrahedral borate ion B(OH)(4)(-). One of the key assumption in the use of boron isotopic compositions of carbonates as pH proxy is that only borate ions, B(OH)(4)(-), are incorporated into the carbonate. Here, we investigate the speciation of boron in deep-sea coral microstructures (Lophelia pertusa specimen) by using high field magic angle spinning nuclear magnetic resonance (B-11 MAS NMR) and electron energy-loss spectroscopy (EELS). We observe both boron coordination species, but in different proportions depending on the coral microstructure, i.e. centres of calcification versus fibres. These results suggest that careful sampling is necessary before performing boron isotopic measurements in deep-sea corals. By combining the proportions of B(OH)(3) and B(OH)(4)(-) determined by NMR and our previous ion microprobe boron isotope measurements, we propose a new equation for the relation between seawater pH and boron isotopic composition in deep-sea corals. (C) 2010 Elsevier Ltd. All rights reserved. 75; Other/Unknown Material Lophelia pertusa LillOA (Lille Open Archive - Université de Lille) |
institution |
Open Polar |
collection |
LillOA (Lille Open Archive - Université de Lille) |
op_collection_id |
ftunivlilleoa |
language |
English |
description |
Dissolved boron in modern seawater occurs in the form of two species, trigonal boric acid B(OH)(3) and tetrahedral borate ion B(OH)(4)(-). One of the key assumption in the use of boron isotopic compositions of carbonates as pH proxy is that only borate ions, B(OH)(4)(-), are incorporated into the carbonate. Here, we investigate the speciation of boron in deep-sea coral microstructures (Lophelia pertusa specimen) by using high field magic angle spinning nuclear magnetic resonance (B-11 MAS NMR) and electron energy-loss spectroscopy (EELS). We observe both boron coordination species, but in different proportions depending on the coral microstructure, i.e. centres of calcification versus fibres. These results suggest that careful sampling is necessary before performing boron isotopic measurements in deep-sea corals. By combining the proportions of B(OH)(3) and B(OH)(4)(-) determined by NMR and our previous ion microprobe boron isotope measurements, we propose a new equation for the relation between seawater pH and boron isotopic composition in deep-sea corals. (C) 2010 Elsevier Ltd. All rights reserved. 75; |
author2 |
Université de Lille ENSCL CNRS INRA Centre de Recherches Pétrographiques et Géochimiques CRPG Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette LSCE Unité de Catalyse et Chimie du Solide - UMR 8181 UCCS Unité Matériaux et Transformations - UMR 8207 UMET Interactions et dynamique des environnements de surface IDES |
format |
Other/Unknown Material |
author |
Rollion-Bard, Claire Blamart, Dominique Trebosc, Julien Tricot, Grégory Mussi, Alexandre Cuif, Jean-Pierre |
spellingShingle |
Rollion-Bard, Claire Blamart, Dominique Trebosc, Julien Tricot, Grégory Mussi, Alexandre Cuif, Jean-Pierre Boron isotopes as pH proxy: A new look at boron speciation in deep-sea corals using 11B MAS NMR and EELS |
author_facet |
Rollion-Bard, Claire Blamart, Dominique Trebosc, Julien Tricot, Grégory Mussi, Alexandre Cuif, Jean-Pierre |
author_sort |
Rollion-Bard, Claire |
title |
Boron isotopes as pH proxy: A new look at boron speciation in deep-sea corals using 11B MAS NMR and EELS |
title_short |
Boron isotopes as pH proxy: A new look at boron speciation in deep-sea corals using 11B MAS NMR and EELS |
title_full |
Boron isotopes as pH proxy: A new look at boron speciation in deep-sea corals using 11B MAS NMR and EELS |
title_fullStr |
Boron isotopes as pH proxy: A new look at boron speciation in deep-sea corals using 11B MAS NMR and EELS |
title_full_unstemmed |
Boron isotopes as pH proxy: A new look at boron speciation in deep-sea corals using 11B MAS NMR and EELS |
title_sort |
boron isotopes as ph proxy: a new look at boron speciation in deep-sea corals using 11b mas nmr and eels |
publishDate |
2021 |
url |
https://hdl.handle.net/20.500.12210/7950 |
genre |
Lophelia pertusa |
genre_facet |
Lophelia pertusa |
op_relation |
10.1016/j.gca.2010.11.023 Geochimica et Cosmochimica Acta http://hdl.handle.net/20.500.12210/7950 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/20.500.12210/7950 |
_version_ |
1766064543679643648 |