$^{40}$Ar/$^{39}$Ar, K–Ar and $^{230}$Th–$^{238}$U dating of the Laschamp excursion: a radioisotopic tie-point for ice core and climate chronologies
International audience A brief period of enhanced $^{10}$Be flux that straddles the interstadial warm period known as Dansgaard–Oeschger event 10 in Greenland and its counterpart in Antarctica, the Antarctic Isotope Maximum 10 is but one consequence of the weakening of Earth's magnetic field as...
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Online Access: | https://hal.science/hal-03199249 https://doi.org/10.1016/j.epsl.2009.06.030 |
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ftuniversailles:oai:HAL:hal-03199249v1 2024-04-28T07:56:07+00:00 $^{40}$Ar/$^{39}$Ar, K–Ar and $^{230}$Th–$^{238}$U dating of the Laschamp excursion: a radioisotopic tie-point for ice core and climate chronologies Singer, Brad, S. Guillou, Herve Jicha, Brian, R. Laj, Carlo Kissel, Catherine Beard, Brian, L. Johnson, Clark, M. Department of Geoscience Madison University of Wisconsin-Madison 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)) Climat et Magnétisme (CLIMAG) 2009-08 https://hal.science/hal-03199249 https://doi.org/10.1016/j.epsl.2009.06.030 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2009.06.030 hal-03199249 https://hal.science/hal-03199249 doi:10.1016/j.epsl.2009.06.030 ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-03199249 Earth and Planetary Science Letters, 2009, 286 (1-2), pp.80-88. ⟨10.1016/j.epsl.2009.06.030⟩ https://www.sciencedirect.com/science/article/pii/S0012821X09003483?via%3Dihub [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2009 ftuniversailles https://doi.org/10.1016/j.epsl.2009.06.030 2024-04-04T17:34:31Z International audience A brief period of enhanced $^{10}$Be flux that straddles the interstadial warm period known as Dansgaard–Oeschger event 10 in Greenland and its counterpart in Antarctica, the Antarctic Isotope Maximum 10 is but one consequence of the weakening of Earth's magnetic field associated with the Laschamp excursion. This $^{10}$Be peak measured in the GRIP ice core is dated at 41,250 y b2k (= before year 2000 AD) in the most recent GICC05 age model obtained from the NorthGRIP core via multi-parameter counting of annual layers. Uncertainty in the age of the $^{10}$Be peak is, however, no better than ± 1630 y at the 95% confidence level, reflecting accumulated error in identifying annual layers. The age of the Laschamp excursion [Guillou, H., Singer, B.S., Laj, C., Kissel, C., Scaillet, S., Jicha, B., 2004. On the age of the Laschamp geomagnetic excursion. Earth Planet. Sci. Lett. 227, 331-343.] is revised on the basis of new $^{40}$Ar/$^{39}$Ar, unspiked K–Ar and $^{238}$U–$^{230}$Th data from three lava flows in the Massif Central, France, together with the $^{40}$Ar/$^{39}$Ar age of a transitionally magnetized lava flow at Auckland, New Zealand. Combined, these data yield an age of 40,700 ± 950 y b2k, where the uncertainty includes both analytical and systematic ($^{40}$K and $^{230}$Th decay constant) errors. Taking the radioisotopic age as a calibration tie point suggests that the layer-counting chronologies for the NorthGRIP and GISP2 ice cores are more accurate and precise than previously thought at depths corresponding to the Laschamp excursion Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland GRIP ice core Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Earth and Planetary Science Letters 286 1-2 80 88 |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Singer, Brad, S. Guillou, Herve Jicha, Brian, R. Laj, Carlo Kissel, Catherine Beard, Brian, L. Johnson, Clark, M. $^{40}$Ar/$^{39}$Ar, K–Ar and $^{230}$Th–$^{238}$U dating of the Laschamp excursion: a radioisotopic tie-point for ice core and climate chronologies |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience A brief period of enhanced $^{10}$Be flux that straddles the interstadial warm period known as Dansgaard–Oeschger event 10 in Greenland and its counterpart in Antarctica, the Antarctic Isotope Maximum 10 is but one consequence of the weakening of Earth's magnetic field associated with the Laschamp excursion. This $^{10}$Be peak measured in the GRIP ice core is dated at 41,250 y b2k (= before year 2000 AD) in the most recent GICC05 age model obtained from the NorthGRIP core via multi-parameter counting of annual layers. Uncertainty in the age of the $^{10}$Be peak is, however, no better than ± 1630 y at the 95% confidence level, reflecting accumulated error in identifying annual layers. The age of the Laschamp excursion [Guillou, H., Singer, B.S., Laj, C., Kissel, C., Scaillet, S., Jicha, B., 2004. On the age of the Laschamp geomagnetic excursion. Earth Planet. Sci. Lett. 227, 331-343.] is revised on the basis of new $^{40}$Ar/$^{39}$Ar, unspiked K–Ar and $^{238}$U–$^{230}$Th data from three lava flows in the Massif Central, France, together with the $^{40}$Ar/$^{39}$Ar age of a transitionally magnetized lava flow at Auckland, New Zealand. Combined, these data yield an age of 40,700 ± 950 y b2k, where the uncertainty includes both analytical and systematic ($^{40}$K and $^{230}$Th decay constant) errors. Taking the radioisotopic age as a calibration tie point suggests that the layer-counting chronologies for the NorthGRIP and GISP2 ice cores are more accurate and precise than previously thought at depths corresponding to the Laschamp excursion |
author2 |
Department of Geoscience Madison University of Wisconsin-Madison 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)) Climat et Magnétisme (CLIMAG) |
format |
Article in Journal/Newspaper |
author |
Singer, Brad, S. Guillou, Herve Jicha, Brian, R. Laj, Carlo Kissel, Catherine Beard, Brian, L. Johnson, Clark, M. |
author_facet |
Singer, Brad, S. Guillou, Herve Jicha, Brian, R. Laj, Carlo Kissel, Catherine Beard, Brian, L. Johnson, Clark, M. |
author_sort |
Singer, Brad, S. |
title |
$^{40}$Ar/$^{39}$Ar, K–Ar and $^{230}$Th–$^{238}$U dating of the Laschamp excursion: a radioisotopic tie-point for ice core and climate chronologies |
title_short |
$^{40}$Ar/$^{39}$Ar, K–Ar and $^{230}$Th–$^{238}$U dating of the Laschamp excursion: a radioisotopic tie-point for ice core and climate chronologies |
title_full |
$^{40}$Ar/$^{39}$Ar, K–Ar and $^{230}$Th–$^{238}$U dating of the Laschamp excursion: a radioisotopic tie-point for ice core and climate chronologies |
title_fullStr |
$^{40}$Ar/$^{39}$Ar, K–Ar and $^{230}$Th–$^{238}$U dating of the Laschamp excursion: a radioisotopic tie-point for ice core and climate chronologies |
title_full_unstemmed |
$^{40}$Ar/$^{39}$Ar, K–Ar and $^{230}$Th–$^{238}$U dating of the Laschamp excursion: a radioisotopic tie-point for ice core and climate chronologies |
title_sort |
$^{40}$ar/$^{39}$ar, k–ar and $^{230}$th–$^{238}$u dating of the laschamp excursion: a radioisotopic tie-point for ice core and climate chronologies |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-03199249 https://doi.org/10.1016/j.epsl.2009.06.030 |
genre |
Antarc* Antarctic Antarctica Greenland GRIP ice core |
genre_facet |
Antarc* Antarctic Antarctica Greenland GRIP ice core |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-03199249 Earth and Planetary Science Letters, 2009, 286 (1-2), pp.80-88. ⟨10.1016/j.epsl.2009.06.030⟩ https://www.sciencedirect.com/science/article/pii/S0012821X09003483?via%3Dihub |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2009.06.030 hal-03199249 https://hal.science/hal-03199249 doi:10.1016/j.epsl.2009.06.030 |
op_doi |
https://doi.org/10.1016/j.epsl.2009.06.030 |
container_title |
Earth and Planetary Science Letters |
container_volume |
286 |
container_issue |
1-2 |
container_start_page |
80 |
op_container_end_page |
88 |
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1797582129466441728 |