Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective
International audience The end of the Neoproterozoic Era (1000 to 541 Ma) is widely believed to have seen the transition from a dominantly anoxic to an oxygenated deep ocean. This purported redox transition appears to be closely linked temporally with metazoan radiation and extraordinary perturbatio...
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
2014
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-01388690 https://hal.archives-ouvertes.fr/hal-01388690/document https://hal.archives-ouvertes.fr/hal-01388690/file/Ader%20et%20al%202014.pdf https://doi.org/10.1016/j.epsl.2014.03.042 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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English |
topic |
ocean oxygenation nitrogen biogeochemical cycle Nitrogen isotopes Neoproterozoic paleoceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
ocean oxygenation nitrogen biogeochemical cycle Nitrogen isotopes Neoproterozoic paleoceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Ader, Magali, Sansjofre, Pierre, Halverson, Galen, Busigny, Vincent, Trindade, Ricardo I. F. Kunzmann, Marcus, Nogueira, Afonso C. R. Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective |
topic_facet |
ocean oxygenation nitrogen biogeochemical cycle Nitrogen isotopes Neoproterozoic paleoceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The end of the Neoproterozoic Era (1000 to 541 Ma) is widely believed to have seen the transition from a dominantly anoxic to an oxygenated deep ocean. This purported redox transition appears to be closely linked temporally with metazoan radiation and extraordinary perturbations to the global carbon cycle. However, the geochemical record of this transition is not straightforward, and individual data sets have been variably interpreted to indicate full oxygenation by the early Ediacaran Period (635 to 541 Ma) and deep ocean anoxia persevering as late as the early Cambrian. Because any change in marine redox structure would have profoundly impacted nitrogen nutrient cycling in the global ocean, the N isotope signature of sedimentary rocks (δ15Nsed) should reflect the Neoproterozoic deep-ocean redox transition. We present new N isotope data from Amazonia, northwest Canada, northeast Svalbard, and South China that span the Cryogenian glaciations (∼750 to 580 Ma). These and previously published data reveal a Nisotope distribution that closely resembles modern marine sediments, with a mode in δ15N close to +4 and range from −4 to +11. No apparent change is seen between the Cryogenian and Ediacarian. Data from earlier Proterozoic samples show a similar distribution, but shifted slightly towards more negative δ15N values and with a wider range. The most parsimonious explanation for the similarity of these Nisotopedistribution is that as in the modern ocean, nitrate (and hence O2) was stable in most of the middle–late Neoproterozoic ocean, and possibly much of Proterozoic Eon. However, nitrate would likely have been depleted in partially restricted basins and oxygen minimum zones (OMZs), which may have been more widespread than in the modern ocean. |
author2 |
Institut de Physique du Globe de Paris (IPGP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS) Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Instituto de Astronomia, Geofísica e Ciências Atmosféricas São Paulo (IAG) Universidade de São Paulo (USP) Department of Earth and Planetary Sciences/Geotop McGill University = Université McGill Montréal, Canada Faculdade de Geologia Federal University of Para - Universidade Federal do Para Belem - Brésil |
format |
Article in Journal/Newspaper |
author |
Ader, Magali, Sansjofre, Pierre, Halverson, Galen, Busigny, Vincent, Trindade, Ricardo I. F. Kunzmann, Marcus, Nogueira, Afonso C. R. |
author_facet |
Ader, Magali, Sansjofre, Pierre, Halverson, Galen, Busigny, Vincent, Trindade, Ricardo I. F. Kunzmann, Marcus, Nogueira, Afonso C. R. |
author_sort |
Ader, Magali, |
title |
Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective |
title_short |
Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective |
title_full |
Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective |
title_fullStr |
Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective |
title_full_unstemmed |
Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective |
title_sort |
ocean redox structure across the late neoproterozoic oxygenation event: a nitrogen isotope perspective |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.archives-ouvertes.fr/hal-01388690 https://hal.archives-ouvertes.fr/hal-01388690/document https://hal.archives-ouvertes.fr/hal-01388690/file/Ader%20et%20al%202014.pdf https://doi.org/10.1016/j.epsl.2014.03.042 |
geographic |
Canada Svalbard |
geographic_facet |
Canada Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.archives-ouvertes.fr/hal-01388690 Earth and Planetary Science Letters, Elsevier, 2014, 396, pp.1 - 13. ⟨10.1016/j.epsl.2014.03.042⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2014.03.042 hal-01388690 https://hal.archives-ouvertes.fr/hal-01388690 https://hal.archives-ouvertes.fr/hal-01388690/document https://hal.archives-ouvertes.fr/hal-01388690/file/Ader%20et%20al%202014.pdf doi:10.1016/j.epsl.2014.03.042 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2014.03.042 |
container_title |
Earth and Planetary Science Letters |
container_volume |
396 |
container_start_page |
1 |
op_container_end_page |
13 |
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1766213293820608512 |
spelling |
ftccsdartic:oai:HAL:hal-01388690v1 2023-05-15T18:29:52+02:00 Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective Ader, Magali, Sansjofre, Pierre, Halverson, Galen, Busigny, Vincent, Trindade, Ricardo I. F. Kunzmann, Marcus, Nogueira, Afonso C. R. Institut de Physique du Globe de Paris (IPGP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS) Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Instituto de Astronomia, Geofísica e Ciências Atmosféricas São Paulo (IAG) Universidade de São Paulo (USP) Department of Earth and Planetary Sciences/Geotop McGill University = Université McGill Montréal, Canada Faculdade de Geologia Federal University of Para - Universidade Federal do Para Belem - Brésil 2014 https://hal.archives-ouvertes.fr/hal-01388690 https://hal.archives-ouvertes.fr/hal-01388690/document https://hal.archives-ouvertes.fr/hal-01388690/file/Ader%20et%20al%202014.pdf https://doi.org/10.1016/j.epsl.2014.03.042 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2014.03.042 hal-01388690 https://hal.archives-ouvertes.fr/hal-01388690 https://hal.archives-ouvertes.fr/hal-01388690/document https://hal.archives-ouvertes.fr/hal-01388690/file/Ader%20et%20al%202014.pdf doi:10.1016/j.epsl.2014.03.042 info:eu-repo/semantics/OpenAccess ISSN: 0012-821X Earth and Planetary Science Letters https://hal.archives-ouvertes.fr/hal-01388690 Earth and Planetary Science Letters, Elsevier, 2014, 396, pp.1 - 13. ⟨10.1016/j.epsl.2014.03.042⟩ ocean oxygenation nitrogen biogeochemical cycle Nitrogen isotopes Neoproterozoic paleoceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2014 ftccsdartic https://doi.org/10.1016/j.epsl.2014.03.042 2021-11-21T02:42:16Z International audience The end of the Neoproterozoic Era (1000 to 541 Ma) is widely believed to have seen the transition from a dominantly anoxic to an oxygenated deep ocean. This purported redox transition appears to be closely linked temporally with metazoan radiation and extraordinary perturbations to the global carbon cycle. However, the geochemical record of this transition is not straightforward, and individual data sets have been variably interpreted to indicate full oxygenation by the early Ediacaran Period (635 to 541 Ma) and deep ocean anoxia persevering as late as the early Cambrian. Because any change in marine redox structure would have profoundly impacted nitrogen nutrient cycling in the global ocean, the N isotope signature of sedimentary rocks (δ15Nsed) should reflect the Neoproterozoic deep-ocean redox transition. We present new N isotope data from Amazonia, northwest Canada, northeast Svalbard, and South China that span the Cryogenian glaciations (∼750 to 580 Ma). These and previously published data reveal a Nisotope distribution that closely resembles modern marine sediments, with a mode in δ15N close to +4 and range from −4 to +11. No apparent change is seen between the Cryogenian and Ediacarian. Data from earlier Proterozoic samples show a similar distribution, but shifted slightly towards more negative δ15N values and with a wider range. The most parsimonious explanation for the similarity of these Nisotopedistribution is that as in the modern ocean, nitrate (and hence O2) was stable in most of the middle–late Neoproterozoic ocean, and possibly much of Proterozoic Eon. However, nitrate would likely have been depleted in partially restricted basins and oxygen minimum zones (OMZs), which may have been more widespread than in the modern ocean. Article in Journal/Newspaper Svalbard Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Canada Svalbard Earth and Planetary Science Letters 396 1 13 |