Constraining the age of the last geomagnetic reversal from geochemical and magnetic analyses of Atlantic, Indian, and Pacific Ocean sediments
International audience We studied four marine sediment records of the Matuyama-Brunhes geomagnetic reversal from four sites located in the Indian, Atlantic and western Pacific oceans. The results combine paleomagnetic, cosmogenic nuclide beryllium (Be-10) and oxygen isotope analyses that were perfor...
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
2019
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Subjects: | |
Online Access: | https://hal.inrae.fr/hal-02629188 https://hal.inrae.fr/hal-02629188/document https://hal.inrae.fr/hal-02629188/file/1-s2.0-S0012821X18306630-main.pdf https://doi.org/10.1016/j.epsl.2018.11.012 |
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Université de Paris: Portail HAL |
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ftunivparis |
language |
English |
topic |
Brunhes-Matuyama Be-ratio field intensity stratigraphy magnetic reversal [SDV]Life Sciences [q-bio] [SDE]Environmental Sciences |
spellingShingle |
Brunhes-Matuyama Be-ratio field intensity stratigraphy magnetic reversal [SDV]Life Sciences [q-bio] [SDE]Environmental Sciences Valet, Jean-Pierre Bassinot, Franck Simon, Quentin Savranskaia, Tatiana Thouveny, Nicolas Bourlès, Didier Villedieu, Anouk Constraining the age of the last geomagnetic reversal from geochemical and magnetic analyses of Atlantic, Indian, and Pacific Ocean sediments |
topic_facet |
Brunhes-Matuyama Be-ratio field intensity stratigraphy magnetic reversal [SDV]Life Sciences [q-bio] [SDE]Environmental Sciences |
description |
International audience We studied four marine sediment records of the Matuyama-Brunhes geomagnetic reversal from four sites located in the Indian, Atlantic and western Pacific oceans. The results combine paleomagnetic, cosmogenic nuclide beryllium (Be-10) and oxygen isotope analyses that were performed on the same samples in order to avoid any stratigraphic bias. The three records from the equatorial Indian Ocean and North Atlantic Ocean did not reveal any offset between the authigenic Be-10/Be-9 ratio (Be-ratio) peak and the interval of low relative paleointensity (RPI) that characterizes the reversal. The lower and upper limits of transitional directions are also concomitant with the increased atmospheric Be-10 production that accompanied the geomagnetic dipole intensity decrease. In contrast, the record from western equatorial Pacific Ocean sediments was found 18 cm below the Be-ratio changes as a result of late magnetization acquisition. At all four sites, maximum Be-10 production occurred at the same period soon after the maximum of Marine Isotope Stage 19 (MIS 19) and, therefore, indicates its synchronous worldwide character. Such features are effectively observed from the Be-ratio signals and their relationship with the magnetic transition interval, which further confirms the synchronous character of the transition. Taking all dating uncertainties (1.6 ka between sites and 5 ka for the age model) into consideration, our records suggest a mean reversal age of 772.4 +/- 6.6 ka. The age of the transition in the Atlantic Ocean record is closer to 774 ka but this difference is within the limit of significance. |
author2 |
Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) European Project: 339899,EC:FP7:ERC,ERC-2013-ADG,EDIFICE(2014) |
format |
Article in Journal/Newspaper |
author |
Valet, Jean-Pierre Bassinot, Franck Simon, Quentin Savranskaia, Tatiana Thouveny, Nicolas Bourlès, Didier Villedieu, Anouk |
author_facet |
Valet, Jean-Pierre Bassinot, Franck Simon, Quentin Savranskaia, Tatiana Thouveny, Nicolas Bourlès, Didier Villedieu, Anouk |
author_sort |
Valet, Jean-Pierre |
title |
Constraining the age of the last geomagnetic reversal from geochemical and magnetic analyses of Atlantic, Indian, and Pacific Ocean sediments |
title_short |
Constraining the age of the last geomagnetic reversal from geochemical and magnetic analyses of Atlantic, Indian, and Pacific Ocean sediments |
title_full |
Constraining the age of the last geomagnetic reversal from geochemical and magnetic analyses of Atlantic, Indian, and Pacific Ocean sediments |
title_fullStr |
Constraining the age of the last geomagnetic reversal from geochemical and magnetic analyses of Atlantic, Indian, and Pacific Ocean sediments |
title_full_unstemmed |
Constraining the age of the last geomagnetic reversal from geochemical and magnetic analyses of Atlantic, Indian, and Pacific Ocean sediments |
title_sort |
constraining the age of the last geomagnetic reversal from geochemical and magnetic analyses of atlantic, indian, and pacific ocean sediments |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.inrae.fr/hal-02629188 https://hal.inrae.fr/hal-02629188/document https://hal.inrae.fr/hal-02629188/file/1-s2.0-S0012821X18306630-main.pdf https://doi.org/10.1016/j.epsl.2018.11.012 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.inrae.fr/hal-02629188 Earth and Planetary Science Letters, 2019, 506, pp.323-331. ⟨10.1016/j.epsl.2018.11.012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2018.11.012 info:eu-repo/grantAgreement/EC/FP7/339899/EU/Changes in the geomagnetic dipole (Earth Dipole Field Intensity from Cosmogenic Elements)/EDIFICE hal-02629188 https://hal.inrae.fr/hal-02629188 https://hal.inrae.fr/hal-02629188/document https://hal.inrae.fr/hal-02629188/file/1-s2.0-S0012821X18306630-main.pdf doi:10.1016/j.epsl.2018.11.012 PRODINRA: 467100 WOS: 000455693800030 |
op_rights |
http://creativecommons.org/licenses/by-nd/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2018.11.012 |
container_title |
Earth and Planetary Science Letters |
container_volume |
506 |
container_start_page |
323 |
op_container_end_page |
331 |
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1802647796775387136 |
spelling |
ftunivparis:oai:HAL:hal-02629188v1 2024-06-23T07:55:16+00:00 Constraining the age of the last geomagnetic reversal from geochemical and magnetic analyses of Atlantic, Indian, and Pacific Ocean sediments Valet, Jean-Pierre Bassinot, Franck Simon, Quentin Savranskaia, Tatiana Thouveny, Nicolas Bourlès, Didier Villedieu, Anouk Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) European Project: 339899,EC:FP7:ERC,ERC-2013-ADG,EDIFICE(2014) 2019 https://hal.inrae.fr/hal-02629188 https://hal.inrae.fr/hal-02629188/document https://hal.inrae.fr/hal-02629188/file/1-s2.0-S0012821X18306630-main.pdf https://doi.org/10.1016/j.epsl.2018.11.012 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2018.11.012 info:eu-repo/grantAgreement/EC/FP7/339899/EU/Changes in the geomagnetic dipole (Earth Dipole Field Intensity from Cosmogenic Elements)/EDIFICE hal-02629188 https://hal.inrae.fr/hal-02629188 https://hal.inrae.fr/hal-02629188/document https://hal.inrae.fr/hal-02629188/file/1-s2.0-S0012821X18306630-main.pdf doi:10.1016/j.epsl.2018.11.012 PRODINRA: 467100 WOS: 000455693800030 http://creativecommons.org/licenses/by-nd/ info:eu-repo/semantics/OpenAccess ISSN: 0012-821X Earth and Planetary Science Letters https://hal.inrae.fr/hal-02629188 Earth and Planetary Science Letters, 2019, 506, pp.323-331. ⟨10.1016/j.epsl.2018.11.012⟩ Brunhes-Matuyama Be-ratio field intensity stratigraphy magnetic reversal [SDV]Life Sciences [q-bio] [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2019 ftunivparis https://doi.org/10.1016/j.epsl.2018.11.012 2024-06-13T23:41:22Z International audience We studied four marine sediment records of the Matuyama-Brunhes geomagnetic reversal from four sites located in the Indian, Atlantic and western Pacific oceans. The results combine paleomagnetic, cosmogenic nuclide beryllium (Be-10) and oxygen isotope analyses that were performed on the same samples in order to avoid any stratigraphic bias. The three records from the equatorial Indian Ocean and North Atlantic Ocean did not reveal any offset between the authigenic Be-10/Be-9 ratio (Be-ratio) peak and the interval of low relative paleointensity (RPI) that characterizes the reversal. The lower and upper limits of transitional directions are also concomitant with the increased atmospheric Be-10 production that accompanied the geomagnetic dipole intensity decrease. In contrast, the record from western equatorial Pacific Ocean sediments was found 18 cm below the Be-ratio changes as a result of late magnetization acquisition. At all four sites, maximum Be-10 production occurred at the same period soon after the maximum of Marine Isotope Stage 19 (MIS 19) and, therefore, indicates its synchronous worldwide character. Such features are effectively observed from the Be-ratio signals and their relationship with the magnetic transition interval, which further confirms the synchronous character of the transition. Taking all dating uncertainties (1.6 ka between sites and 5 ka for the age model) into consideration, our records suggest a mean reversal age of 772.4 +/- 6.6 ka. The age of the transition in the Atlantic Ocean record is closer to 774 ka but this difference is within the limit of significance. Article in Journal/Newspaper North Atlantic Université de Paris: Portail HAL Indian Pacific Earth and Planetary Science Letters 506 323 331 |