Authigenic 10Be/9Be ratio signatures of the cosmogenic nuclide production linked to geomagnetic dipole moment variation since the Brunhes/Matuyama boundary
Geomagnetic dipole moment variations associated with polarity reversals and excursions are expressed by large changes of the cosmogenic nuclide beryllium-10 (10Be) production rates. Authigenic 10Be/9Be ratios (proxy of atmospheric 10Be production) from oceanic cores therefore complete the classical...
Published in: | Journal of Geophysical Research: Solid Earth |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Amer Geophysical Union
2016
|
Subjects: | |
Online Access: | https://archimer.ifremer.fr/doc/00358/46910/46811.pdf https://archimer.ifremer.fr/doc/00358/46910/46814.pdf https://archimer.ifremer.fr/doc/00358/46910/46815.pdf https://archimer.ifremer.fr/doc/00358/46910/46816.csv https://doi.org/10.1002/2016JB013335 https://archimer.ifremer.fr/doc/00358/46910/ |
id |
ftarchimer:oai:archimer.ifremer.fr:46910 |
---|---|
record_format |
openpolar |
spelling |
ftarchimer:oai:archimer.ifremer.fr:46910 2023-05-15T16:51:12+02:00 Authigenic 10Be/9Be ratio signatures of the cosmogenic nuclide production linked to geomagnetic dipole moment variation since the Brunhes/Matuyama boundary Simon, Quentin Thouveny, Nicolas Bourles, Didier L. Valet, Jean-pierre Bassinot, Franck Menabreaz, Lucie Guillou, Valery Choy, Sandrine Beaufort, Luc 2016-11 application/pdf https://archimer.ifremer.fr/doc/00358/46910/46811.pdf https://archimer.ifremer.fr/doc/00358/46910/46814.pdf https://archimer.ifremer.fr/doc/00358/46910/46815.pdf https://archimer.ifremer.fr/doc/00358/46910/46816.csv https://doi.org/10.1002/2016JB013335 https://archimer.ifremer.fr/doc/00358/46910/ eng eng Amer Geophysical Union info:eu-repo/grantAgreement/EC/FP7/339899/EU//EDIFICE https://archimer.ifremer.fr/doc/00358/46910/46811.pdf https://archimer.ifremer.fr/doc/00358/46910/46814.pdf https://archimer.ifremer.fr/doc/00358/46910/46815.pdf https://archimer.ifremer.fr/doc/00358/46910/46816.csv doi:10.1002/2016JB013335 https://archimer.ifremer.fr/doc/00358/46910/ 2016. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. info:eu-repo/semantics/openAccess restricted use CC-BY-NC-ND Journal Of Geophysical Research-solid Earth (2169-9313) (Amer Geophysical Union), 2016-11 , Vol. 121 , N. 11 , P. 7716-7741 text Publication info:eu-repo/semantics/article 2016 ftarchimer https://doi.org/10.1002/2016JB013335 2021-09-23T20:28:58Z Geomagnetic dipole moment variations associated with polarity reversals and excursions are expressed by large changes of the cosmogenic nuclide beryllium-10 (10Be) production rates. Authigenic 10Be/9Be ratios (proxy of atmospheric 10Be production) from oceanic cores therefore complete the classical information derived from relative paleointensity (RPI) records. This study presents new authigenic 10Be/9Be ratio results obtained from cores MD05-2920 and MD05-2930 collected in the west equatorial Pacific Ocean. Be ratios from cores MD05-2920, MD05-2930 and MD90-0961 have been stacked and averaged. Variations of the authigenic 10Be/9Be ratio are analyzed and compared with the geomagnetic dipole low series reported from global RPI stacks. The largest 10Be overproduction episodes are related to dipole field collapses (below a threshold of 2 × 1022 Am2) associated with the Brunhes/Matuyama reversal, the Laschamp (41 ka) excursion, and the Iceland Basin event (190 ka). Other significant 10Be production peaks are correlated to geomagnetic excursions reported in literature. The record was then calibrated by using absolute dipole moment values drawn from the Geomagia and Pint paleointensity value databases. The 10Be-derived geomagnetic dipole moment record, independent from sedimentary paleomagnetic data, covers the Brunhes-Matuyama transition and the whole Brunhes Chron. It provides new and complementary data on the amplitude and timing of millennial-scale geomagnetic dipole moment variations and particularly on dipole moment collapses triggering polarity instabilities. Article in Journal/Newspaper Iceland Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Pacific Journal of Geophysical Research: Solid Earth 121 11 7716 7741 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Geomagnetic dipole moment variations associated with polarity reversals and excursions are expressed by large changes of the cosmogenic nuclide beryllium-10 (10Be) production rates. Authigenic 10Be/9Be ratios (proxy of atmospheric 10Be production) from oceanic cores therefore complete the classical information derived from relative paleointensity (RPI) records. This study presents new authigenic 10Be/9Be ratio results obtained from cores MD05-2920 and MD05-2930 collected in the west equatorial Pacific Ocean. Be ratios from cores MD05-2920, MD05-2930 and MD90-0961 have been stacked and averaged. Variations of the authigenic 10Be/9Be ratio are analyzed and compared with the geomagnetic dipole low series reported from global RPI stacks. The largest 10Be overproduction episodes are related to dipole field collapses (below a threshold of 2 × 1022 Am2) associated with the Brunhes/Matuyama reversal, the Laschamp (41 ka) excursion, and the Iceland Basin event (190 ka). Other significant 10Be production peaks are correlated to geomagnetic excursions reported in literature. The record was then calibrated by using absolute dipole moment values drawn from the Geomagia and Pint paleointensity value databases. The 10Be-derived geomagnetic dipole moment record, independent from sedimentary paleomagnetic data, covers the Brunhes-Matuyama transition and the whole Brunhes Chron. It provides new and complementary data on the amplitude and timing of millennial-scale geomagnetic dipole moment variations and particularly on dipole moment collapses triggering polarity instabilities. |
format |
Article in Journal/Newspaper |
author |
Simon, Quentin Thouveny, Nicolas Bourles, Didier L. Valet, Jean-pierre Bassinot, Franck Menabreaz, Lucie Guillou, Valery Choy, Sandrine Beaufort, Luc |
spellingShingle |
Simon, Quentin Thouveny, Nicolas Bourles, Didier L. Valet, Jean-pierre Bassinot, Franck Menabreaz, Lucie Guillou, Valery Choy, Sandrine Beaufort, Luc Authigenic 10Be/9Be ratio signatures of the cosmogenic nuclide production linked to geomagnetic dipole moment variation since the Brunhes/Matuyama boundary |
author_facet |
Simon, Quentin Thouveny, Nicolas Bourles, Didier L. Valet, Jean-pierre Bassinot, Franck Menabreaz, Lucie Guillou, Valery Choy, Sandrine Beaufort, Luc |
author_sort |
Simon, Quentin |
title |
Authigenic 10Be/9Be ratio signatures of the cosmogenic nuclide production linked to geomagnetic dipole moment variation since the Brunhes/Matuyama boundary |
title_short |
Authigenic 10Be/9Be ratio signatures of the cosmogenic nuclide production linked to geomagnetic dipole moment variation since the Brunhes/Matuyama boundary |
title_full |
Authigenic 10Be/9Be ratio signatures of the cosmogenic nuclide production linked to geomagnetic dipole moment variation since the Brunhes/Matuyama boundary |
title_fullStr |
Authigenic 10Be/9Be ratio signatures of the cosmogenic nuclide production linked to geomagnetic dipole moment variation since the Brunhes/Matuyama boundary |
title_full_unstemmed |
Authigenic 10Be/9Be ratio signatures of the cosmogenic nuclide production linked to geomagnetic dipole moment variation since the Brunhes/Matuyama boundary |
title_sort |
authigenic 10be/9be ratio signatures of the cosmogenic nuclide production linked to geomagnetic dipole moment variation since the brunhes/matuyama boundary |
publisher |
Amer Geophysical Union |
publishDate |
2016 |
url |
https://archimer.ifremer.fr/doc/00358/46910/46811.pdf https://archimer.ifremer.fr/doc/00358/46910/46814.pdf https://archimer.ifremer.fr/doc/00358/46910/46815.pdf https://archimer.ifremer.fr/doc/00358/46910/46816.csv https://doi.org/10.1002/2016JB013335 https://archimer.ifremer.fr/doc/00358/46910/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Journal Of Geophysical Research-solid Earth (2169-9313) (Amer Geophysical Union), 2016-11 , Vol. 121 , N. 11 , P. 7716-7741 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/339899/EU//EDIFICE https://archimer.ifremer.fr/doc/00358/46910/46811.pdf https://archimer.ifremer.fr/doc/00358/46910/46814.pdf https://archimer.ifremer.fr/doc/00358/46910/46815.pdf https://archimer.ifremer.fr/doc/00358/46910/46816.csv doi:10.1002/2016JB013335 https://archimer.ifremer.fr/doc/00358/46910/ |
op_rights |
2016. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1002/2016JB013335 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
121 |
container_issue |
11 |
container_start_page |
7716 |
op_container_end_page |
7741 |
_version_ |
1766041304710512640 |