Pervasive sources of isotopically light zinc in the North Atlantic Ocean
International audience In this study, we report seawater dissolved zinc (Zn) concentration and isotope composition (δ66Zn) from the GEOTRACES GA01 (GEOVIDE) section in the North Atlantic. Across the transect, three subsets of samples stand out due to their isotopically light signature: those close t...
Published in: | Earth and Planetary Science Letters |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-02524346 https://hal.archives-ouvertes.fr/hal-02524346/document https://hal.archives-ouvertes.fr/hal-02524346/file/Lemaitre_et_al_2020.pdf https://doi.org/10.1016/j.epsl.2020.116216 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
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language |
English |
topic |
zinc isotopes North Atlantic zinc sources GEOTRACES GEOVIDE [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
spellingShingle |
zinc isotopes North Atlantic zinc sources GEOTRACES GEOVIDE [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Lemaitre, Nolwenn de Souza, Gregory, Archer, Corey Wang, Ruo-Mei Planquette, Hélène Sarthou, Géraldine Vance, Derek Pervasive sources of isotopically light zinc in the North Atlantic Ocean |
topic_facet |
zinc isotopes North Atlantic zinc sources GEOTRACES GEOVIDE [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
International audience In this study, we report seawater dissolved zinc (Zn) concentration and isotope composition (δ66Zn) from the GEOTRACES GA01 (GEOVIDE) section in the North Atlantic. Across the transect, three subsets of samples stand out due to their isotopically light signature: those close to the Reykjanes Ridge, those close to the sediments, and those, pervasively, in the upper ocean. Similar to observations at other locations, the hydrothermal vent of the Reykjanes Ridge is responsible for the isotopically light Zn composition of the surrounding waters, with an estimated source δ66Zn of -0.42 ‰. This isotopically light Zn is then transported over a distance greater than 1000 km from the vent. Sedimentary inputs are also evident all across the trans-Atlantic section, highlighting a much more pervasive process than previously thought. These inputs of isotopically light Zn, ranging from -0.51 to +0.01 ‰, may be caused by diffusion out of Zn-rich pore waters, or by dissolution of sedimentary particles. The upper North Atlantic is dominated by low δ66Zn, a feature that has been observed in all Zn isotope datasets north of the Southern Ocean. Using macronutrient to Zn ratios to better understand modifications of preformed signatures exported from the Southern Ocean, we suggest that low upper-ocean δ66Zn results from addition of isotopically light Zn to the upper ocean, and not necessarily from removal of heavy Zn through scavenging. Though the precise source of this isotopically light upper-ocean Zn is not fully resolved, it seems possible that it is anthropogenic in origin. This view of the controls on upper-ocean Zn is fundamentally different from those put forward previously. |
author2 |
Institute of Geochemistry and Petrology ETH Zürich Department of Earth Sciences Swiss Federal Institute of Technology - ETH Zürich (D-ERDW) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Institute of Earth Sciences Tapei (IES Sinica) Academia Sinica Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) ANR-13-BS06-0014,GEOVIDE,GEOVIDE, Une étude internationale GEOTRACES le long de la section OVIDE en Atlantique Nord et en Mer du Labrador(2013) ANR-12-PDOC-0025,BITMAP,Biodisponibilité du fer et des métaux traces dans les particules marines(2012) ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010) |
format |
Article in Journal/Newspaper |
author |
Lemaitre, Nolwenn de Souza, Gregory, Archer, Corey Wang, Ruo-Mei Planquette, Hélène Sarthou, Géraldine Vance, Derek |
author_facet |
Lemaitre, Nolwenn de Souza, Gregory, Archer, Corey Wang, Ruo-Mei Planquette, Hélène Sarthou, Géraldine Vance, Derek |
author_sort |
Lemaitre, Nolwenn |
title |
Pervasive sources of isotopically light zinc in the North Atlantic Ocean |
title_short |
Pervasive sources of isotopically light zinc in the North Atlantic Ocean |
title_full |
Pervasive sources of isotopically light zinc in the North Atlantic Ocean |
title_fullStr |
Pervasive sources of isotopically light zinc in the North Atlantic Ocean |
title_full_unstemmed |
Pervasive sources of isotopically light zinc in the North Atlantic Ocean |
title_sort |
pervasive sources of isotopically light zinc in the north atlantic ocean |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-02524346 https://hal.archives-ouvertes.fr/hal-02524346/document https://hal.archives-ouvertes.fr/hal-02524346/file/Lemaitre_et_al_2020.pdf https://doi.org/10.1016/j.epsl.2020.116216 |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Reykjanes Southern Ocean |
geographic_facet |
Reykjanes Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.archives-ouvertes.fr/hal-02524346 Earth and Planetary Science Letters, Elsevier, 2020, 539, pp.116216. ⟨10.1016/j.epsl.2020.116216⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2020.116216 hal-02524346 https://hal.archives-ouvertes.fr/hal-02524346 https://hal.archives-ouvertes.fr/hal-02524346/document https://hal.archives-ouvertes.fr/hal-02524346/file/Lemaitre_et_al_2020.pdf doi:10.1016/j.epsl.2020.116216 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2020.116216 |
container_title |
Earth and Planetary Science Letters |
container_volume |
539 |
container_start_page |
116216 |
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1766121325691142144 |
spelling |
ftccsdartic:oai:HAL:hal-02524346v1 2023-05-15T17:28:34+02:00 Pervasive sources of isotopically light zinc in the North Atlantic Ocean Lemaitre, Nolwenn de Souza, Gregory, Archer, Corey Wang, Ruo-Mei Planquette, Hélène Sarthou, Géraldine Vance, Derek Institute of Geochemistry and Petrology ETH Zürich Department of Earth Sciences Swiss Federal Institute of Technology - ETH Zürich (D-ERDW) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Institute of Earth Sciences Tapei (IES Sinica) Academia Sinica Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) ANR-13-BS06-0014,GEOVIDE,GEOVIDE, Une étude internationale GEOTRACES le long de la section OVIDE en Atlantique Nord et en Mer du Labrador(2013) ANR-12-PDOC-0025,BITMAP,Biodisponibilité du fer et des métaux traces dans les particules marines(2012) ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010) 2020 https://hal.archives-ouvertes.fr/hal-02524346 https://hal.archives-ouvertes.fr/hal-02524346/document https://hal.archives-ouvertes.fr/hal-02524346/file/Lemaitre_et_al_2020.pdf https://doi.org/10.1016/j.epsl.2020.116216 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2020.116216 hal-02524346 https://hal.archives-ouvertes.fr/hal-02524346 https://hal.archives-ouvertes.fr/hal-02524346/document https://hal.archives-ouvertes.fr/hal-02524346/file/Lemaitre_et_al_2020.pdf doi:10.1016/j.epsl.2020.116216 info:eu-repo/semantics/OpenAccess ISSN: 0012-821X Earth and Planetary Science Letters https://hal.archives-ouvertes.fr/hal-02524346 Earth and Planetary Science Letters, Elsevier, 2020, 539, pp.116216. ⟨10.1016/j.epsl.2020.116216⟩ zinc isotopes North Atlantic zinc sources GEOTRACES GEOVIDE [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.1016/j.epsl.2020.116216 2021-12-19T01:25:07Z International audience In this study, we report seawater dissolved zinc (Zn) concentration and isotope composition (δ66Zn) from the GEOTRACES GA01 (GEOVIDE) section in the North Atlantic. Across the transect, three subsets of samples stand out due to their isotopically light signature: those close to the Reykjanes Ridge, those close to the sediments, and those, pervasively, in the upper ocean. Similar to observations at other locations, the hydrothermal vent of the Reykjanes Ridge is responsible for the isotopically light Zn composition of the surrounding waters, with an estimated source δ66Zn of -0.42 ‰. This isotopically light Zn is then transported over a distance greater than 1000 km from the vent. Sedimentary inputs are also evident all across the trans-Atlantic section, highlighting a much more pervasive process than previously thought. These inputs of isotopically light Zn, ranging from -0.51 to +0.01 ‰, may be caused by diffusion out of Zn-rich pore waters, or by dissolution of sedimentary particles. The upper North Atlantic is dominated by low δ66Zn, a feature that has been observed in all Zn isotope datasets north of the Southern Ocean. Using macronutrient to Zn ratios to better understand modifications of preformed signatures exported from the Southern Ocean, we suggest that low upper-ocean δ66Zn results from addition of isotopically light Zn to the upper ocean, and not necessarily from removal of heavy Zn through scavenging. Though the precise source of this isotopically light upper-ocean Zn is not fully resolved, it seems possible that it is anthropogenic in origin. This view of the controls on upper-ocean Zn is fundamentally different from those put forward previously. Article in Journal/Newspaper North Atlantic Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Southern Ocean Earth and Planetary Science Letters 539 116216 |