Increased production of cosmogenic Be-10 recorded in oceanic sediment sequences: Information on the age, duration, and amplitude of the geomagnetic dipole moment minimum over the Matuyama-Brunhes transition
New high-resolution authigenic Be-10/Be-9 ratio (Be-ratio) records covering the last geomagnetic reversal, i.e. the Matuyama-Brushes transition (MBT), have been obtained and set on a time scale using benthic delta O-18 (Cibicides wuellerstorfi) records. The geographic distribution of the four studie...
Published in: | Earth and Planetary Science Letters |
---|---|
Main Authors: | , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | http://prodinra.inra.fr/ft/A6312281-29A6-4980-9273-4F1630CA586E http://prodinra.inra.fr/record/453090 https://doi.org/10.1016/j.epsl.2018.02.036 |
id |
ftinraparis:oai:prodinra.inra.fr:453090 |
---|---|
record_format |
openpolar |
spelling |
ftinraparis:oai:prodinra.inra.fr:453090 2023-05-15T17:34:49+02:00 Increased production of cosmogenic Be-10 recorded in oceanic sediment sequences: Information on the age, duration, and amplitude of the geomagnetic dipole moment minimum over the Matuyama-Brunhes transition Thouveny, Nicolas Bourles, Didier L Bassinot, Franck Savranskaia, Tatiana Valet, Jean-Pierre Simon, Quentin 2018 application/pdf http://prodinra.inra.fr/ft/A6312281-29A6-4980-9273-4F1630CA586E http://prodinra.inra.fr/record/453090 https://doi.org/10.1016/j.epsl.2018.02.036 eng eng https://creativecommons.org/licenses/by-nc-nd/3.0/ CC-BY-NC-ND Earth and Planetary Science Letters (489), 191-202. (2018) authigenic Be-10/Be-9 ratio;geomagnetic dipole moment minimum;Matuyama-Brunhes transition (MBT);geomagnetic polarity reversal;marine isotope stage 19;atmospheric Be-10 production rates ARTICLE 2018 ftinraparis https://doi.org/10.1016/j.epsl.2018.02.036 2019-05-21T22:25:31Z New high-resolution authigenic Be-10/Be-9 ratio (Be-ratio) records covering the last geomagnetic reversal, i.e. the Matuyama-Brushes transition (MBT), have been obtained and set on a time scale using benthic delta O-18 (Cibicides wuellerstorfi) records. The geographic distribution of the four studied sites allows global comparison between the North Atlantic, Indian and Pacific Oceans. All Be-ratio records contain a twofold increase triggered by the geomagnetic dipole moment (GDM) collapse associated with the MBT. The stratigraphic position of the Be-ratio spike, relative to marine isotope stages, allows establishment of a robust astrochronological framework for the MBT, anchoring its age between 778 and 766 ka (average mid-peaks at 772 ka), which is consistent with all other available Be-10-proxy records from marine, ice and loess archives. The global Be-10 atmospheric production doubling represents an increase of more than 300 atoms m(-2) s(-1) that is compatible with the increased magnitude of atmospheric Be-10 production obtained by simulations between the present GDM and a null-GDM. The minimum Be-10-derived GDM average computed for the 776-771 ka interval is 1.7 +/- 0.4 x 10(22) Am-2, in agreement with model simulations and absolute paleointensities of transitional lava flows Article in Journal/Newspaper North Atlantic Institut National de la Recherche Agronomique: ProdINRA Indian Pacific Earth and Planetary Science Letters 489 191 202 |
institution |
Open Polar |
collection |
Institut National de la Recherche Agronomique: ProdINRA |
op_collection_id |
ftinraparis |
language |
English |
topic |
authigenic Be-10/Be-9 ratio;geomagnetic dipole moment minimum;Matuyama-Brunhes transition (MBT);geomagnetic polarity reversal;marine isotope stage 19;atmospheric Be-10 production rates |
spellingShingle |
authigenic Be-10/Be-9 ratio;geomagnetic dipole moment minimum;Matuyama-Brunhes transition (MBT);geomagnetic polarity reversal;marine isotope stage 19;atmospheric Be-10 production rates Thouveny, Nicolas Bourles, Didier L Bassinot, Franck Savranskaia, Tatiana Valet, Jean-Pierre Increased production of cosmogenic Be-10 recorded in oceanic sediment sequences: Information on the age, duration, and amplitude of the geomagnetic dipole moment minimum over the Matuyama-Brunhes transition |
topic_facet |
authigenic Be-10/Be-9 ratio;geomagnetic dipole moment minimum;Matuyama-Brunhes transition (MBT);geomagnetic polarity reversal;marine isotope stage 19;atmospheric Be-10 production rates |
description |
New high-resolution authigenic Be-10/Be-9 ratio (Be-ratio) records covering the last geomagnetic reversal, i.e. the Matuyama-Brushes transition (MBT), have been obtained and set on a time scale using benthic delta O-18 (Cibicides wuellerstorfi) records. The geographic distribution of the four studied sites allows global comparison between the North Atlantic, Indian and Pacific Oceans. All Be-ratio records contain a twofold increase triggered by the geomagnetic dipole moment (GDM) collapse associated with the MBT. The stratigraphic position of the Be-ratio spike, relative to marine isotope stages, allows establishment of a robust astrochronological framework for the MBT, anchoring its age between 778 and 766 ka (average mid-peaks at 772 ka), which is consistent with all other available Be-10-proxy records from marine, ice and loess archives. The global Be-10 atmospheric production doubling represents an increase of more than 300 atoms m(-2) s(-1) that is compatible with the increased magnitude of atmospheric Be-10 production obtained by simulations between the present GDM and a null-GDM. The minimum Be-10-derived GDM average computed for the 776-771 ka interval is 1.7 +/- 0.4 x 10(22) Am-2, in agreement with model simulations and absolute paleointensities of transitional lava flows |
author2 |
Simon, Quentin |
format |
Article in Journal/Newspaper |
author |
Thouveny, Nicolas Bourles, Didier L Bassinot, Franck Savranskaia, Tatiana Valet, Jean-Pierre |
author_facet |
Thouveny, Nicolas Bourles, Didier L Bassinot, Franck Savranskaia, Tatiana Valet, Jean-Pierre |
author_sort |
Thouveny, Nicolas |
title |
Increased production of cosmogenic Be-10 recorded in oceanic sediment sequences: Information on the age, duration, and amplitude of the geomagnetic dipole moment minimum over the Matuyama-Brunhes transition |
title_short |
Increased production of cosmogenic Be-10 recorded in oceanic sediment sequences: Information on the age, duration, and amplitude of the geomagnetic dipole moment minimum over the Matuyama-Brunhes transition |
title_full |
Increased production of cosmogenic Be-10 recorded in oceanic sediment sequences: Information on the age, duration, and amplitude of the geomagnetic dipole moment minimum over the Matuyama-Brunhes transition |
title_fullStr |
Increased production of cosmogenic Be-10 recorded in oceanic sediment sequences: Information on the age, duration, and amplitude of the geomagnetic dipole moment minimum over the Matuyama-Brunhes transition |
title_full_unstemmed |
Increased production of cosmogenic Be-10 recorded in oceanic sediment sequences: Information on the age, duration, and amplitude of the geomagnetic dipole moment minimum over the Matuyama-Brunhes transition |
title_sort |
increased production of cosmogenic be-10 recorded in oceanic sediment sequences: information on the age, duration, and amplitude of the geomagnetic dipole moment minimum over the matuyama-brunhes transition |
publishDate |
2018 |
url |
http://prodinra.inra.fr/ft/A6312281-29A6-4980-9273-4F1630CA586E http://prodinra.inra.fr/record/453090 https://doi.org/10.1016/j.epsl.2018.02.036 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Earth and Planetary Science Letters (489), 191-202. (2018) |
op_rights |
https://creativecommons.org/licenses/by-nc-nd/3.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.epsl.2018.02.036 |
container_title |
Earth and Planetary Science Letters |
container_volume |
489 |
container_start_page |
191 |
op_container_end_page |
202 |
_version_ |
1766133775138291712 |