Cosmogenic 10 Be in pyroxene: laboratory progress, production rate systematics, and application of the 10 Be- 3 He nuclide pair in the Antarctic Dry Valleys
International audience Here, we present cosmogenic- 10 Be and cosmogenic- 3 He data from Ferrar dolerite pyroxenes in surficial rock samples and a bedrock core from the McMurdo Dry Valleys, Antarctica, with the goal of refining the laboratory methods for extracting beryllium from pyroxene, further e...
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HAL CCSD
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Online Access: | https://insu.hal.science/insu-04198250 https://insu.hal.science/insu-04198250/document https://insu.hal.science/insu-04198250/file/gchron-5-301-2023.pdf https://doi.org/10.5194/gchron-5-301-2023 |
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ftccsdartic:oai:HAL:insu-04198250v1 2023-10-09T21:47:11+02:00 Cosmogenic 10 Be in pyroxene: laboratory progress, production rate systematics, and application of the 10 Be- 3 He nuclide pair in the Antarctic Dry Valleys Balter-Kennedy, Allie Schaefer, Joerg M. Schwartz, Roseanne Lamp, Jennifer L. Penrose, Laura Middleton, Jennifer Hanley, Jean Tibari, Bouchaïb Blard, Pierre-Henri Winckler, Gisela Hidy, Alan J. Balco, Greg Lamont-Doherty Earth Observatory (LDEO) Columbia University New York Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Lawrence Livermore National Laboratory (LLNL) Berkeley Geochronology Center (BGC) 2023 https://insu.hal.science/insu-04198250 https://insu.hal.science/insu-04198250/document https://insu.hal.science/insu-04198250/file/gchron-5-301-2023.pdf https://doi.org/10.5194/gchron-5-301-2023 en eng HAL CCSD Copernicus Publications info:eu-repo/semantics/altIdentifier/doi/10.5194/gchron-5-301-2023 insu-04198250 https://insu.hal.science/insu-04198250 https://insu.hal.science/insu-04198250/document https://insu.hal.science/insu-04198250/file/gchron-5-301-2023.pdf BIBCODE: 2023GeChr.5.301B doi:10.5194/gchron-5-301-2023 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess EISSN: 2628-3697 Geochronology https://insu.hal.science/insu-04198250 Geochronology, 2023, 5, pp.301-321. ⟨10.5194/gchron-5-301-2023⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftccsdartic https://doi.org/10.5194/gchron-5-301-2023 2023-09-23T22:58:34Z International audience Here, we present cosmogenic- 10 Be and cosmogenic- 3 He data from Ferrar dolerite pyroxenes in surficial rock samples and a bedrock core from the McMurdo Dry Valleys, Antarctica, with the goal of refining the laboratory methods for extracting beryllium from pyroxene, further estimating the 10 Be production rate in pyroxene and demonstrating the applicability of 10 Be- 3 He in mafic rock. The ability to routinely measure cosmogenic 10 Be in pyroxene will open new opportunities for quantifying exposure durations and Earth surface processes in mafic rocks. We describe scalable laboratory methods for isolating beryllium from pyroxene, which include a simple hydrofluoric acid leaching procedure for removing meteoric 10 Be and the addition of a pH 8 precipitation step to reduce the cation load prior to ion exchange chromatography. 10 Be measurements in pyroxene from the surface samples have apparent 3 He exposure ages of 1-6 Myr. We estimate a spallation production rate for 10 Be in pyroxene, referenced to 3 He, of 3.6 ± 0.2 atoms g -1 yr -1 . 10 Be and 3 He measurements in the bedrock core yield initial estimates for parameters associated with 10 Be and 3 He production by negative-muon capture (f 10 ∗ =0.00183 and f 3 ∗ fCfD=0.00337). Next, we demonstrate that the 10 Be- 3 He pair in pyroxene can be used to simultaneously resolve erosion rates and exposure ages, finding that the measured cosmogenic-nuclide concentrations in our surface samples are best explained by 2-8 Myr of exposure at erosion rates of 0-35 cm Myr -1 . Finally, given the low 10 Be in our laboratory blanks (average of 5.7 × 10 3 atoms), the reported measurement precision, and our estimated production rate, it should be possible to measure 2 g samples with 10 Be concentrations of 6 × 10 4 and 1.5 × 10 4 atoms g -1 with 5 % and 15 % uncertainty, respectively. With this level of precision, Last Glacial Maximum to Late Holocene surfaces can now be dated with 10 Be in pyroxene. Application of 10 Be in pyroxene, alone or in ... Article in Journal/Newspaper Antarc* Antarctic Antarctica McMurdo Dry Valleys Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic McMurdo Dry Valleys Geochronology 5 2 301 321 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Balter-Kennedy, Allie Schaefer, Joerg M. Schwartz, Roseanne Lamp, Jennifer L. Penrose, Laura Middleton, Jennifer Hanley, Jean Tibari, Bouchaïb Blard, Pierre-Henri Winckler, Gisela Hidy, Alan J. Balco, Greg Cosmogenic 10 Be in pyroxene: laboratory progress, production rate systematics, and application of the 10 Be- 3 He nuclide pair in the Antarctic Dry Valleys |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Here, we present cosmogenic- 10 Be and cosmogenic- 3 He data from Ferrar dolerite pyroxenes in surficial rock samples and a bedrock core from the McMurdo Dry Valleys, Antarctica, with the goal of refining the laboratory methods for extracting beryllium from pyroxene, further estimating the 10 Be production rate in pyroxene and demonstrating the applicability of 10 Be- 3 He in mafic rock. The ability to routinely measure cosmogenic 10 Be in pyroxene will open new opportunities for quantifying exposure durations and Earth surface processes in mafic rocks. We describe scalable laboratory methods for isolating beryllium from pyroxene, which include a simple hydrofluoric acid leaching procedure for removing meteoric 10 Be and the addition of a pH 8 precipitation step to reduce the cation load prior to ion exchange chromatography. 10 Be measurements in pyroxene from the surface samples have apparent 3 He exposure ages of 1-6 Myr. We estimate a spallation production rate for 10 Be in pyroxene, referenced to 3 He, of 3.6 ± 0.2 atoms g -1 yr -1 . 10 Be and 3 He measurements in the bedrock core yield initial estimates for parameters associated with 10 Be and 3 He production by negative-muon capture (f 10 ∗ =0.00183 and f 3 ∗ fCfD=0.00337). Next, we demonstrate that the 10 Be- 3 He pair in pyroxene can be used to simultaneously resolve erosion rates and exposure ages, finding that the measured cosmogenic-nuclide concentrations in our surface samples are best explained by 2-8 Myr of exposure at erosion rates of 0-35 cm Myr -1 . Finally, given the low 10 Be in our laboratory blanks (average of 5.7 × 10 3 atoms), the reported measurement precision, and our estimated production rate, it should be possible to measure 2 g samples with 10 Be concentrations of 6 × 10 4 and 1.5 × 10 4 atoms g -1 with 5 % and 15 % uncertainty, respectively. With this level of precision, Last Glacial Maximum to Late Holocene surfaces can now be dated with 10 Be in pyroxene. Application of 10 Be in pyroxene, alone or in ... |
author2 |
Lamont-Doherty Earth Observatory (LDEO) Columbia University New York Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Lawrence Livermore National Laboratory (LLNL) Berkeley Geochronology Center (BGC) |
format |
Article in Journal/Newspaper |
author |
Balter-Kennedy, Allie Schaefer, Joerg M. Schwartz, Roseanne Lamp, Jennifer L. Penrose, Laura Middleton, Jennifer Hanley, Jean Tibari, Bouchaïb Blard, Pierre-Henri Winckler, Gisela Hidy, Alan J. Balco, Greg |
author_facet |
Balter-Kennedy, Allie Schaefer, Joerg M. Schwartz, Roseanne Lamp, Jennifer L. Penrose, Laura Middleton, Jennifer Hanley, Jean Tibari, Bouchaïb Blard, Pierre-Henri Winckler, Gisela Hidy, Alan J. Balco, Greg |
author_sort |
Balter-Kennedy, Allie |
title |
Cosmogenic 10 Be in pyroxene: laboratory progress, production rate systematics, and application of the 10 Be- 3 He nuclide pair in the Antarctic Dry Valleys |
title_short |
Cosmogenic 10 Be in pyroxene: laboratory progress, production rate systematics, and application of the 10 Be- 3 He nuclide pair in the Antarctic Dry Valleys |
title_full |
Cosmogenic 10 Be in pyroxene: laboratory progress, production rate systematics, and application of the 10 Be- 3 He nuclide pair in the Antarctic Dry Valleys |
title_fullStr |
Cosmogenic 10 Be in pyroxene: laboratory progress, production rate systematics, and application of the 10 Be- 3 He nuclide pair in the Antarctic Dry Valleys |
title_full_unstemmed |
Cosmogenic 10 Be in pyroxene: laboratory progress, production rate systematics, and application of the 10 Be- 3 He nuclide pair in the Antarctic Dry Valleys |
title_sort |
cosmogenic 10 be in pyroxene: laboratory progress, production rate systematics, and application of the 10 be- 3 he nuclide pair in the antarctic dry valleys |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://insu.hal.science/insu-04198250 https://insu.hal.science/insu-04198250/document https://insu.hal.science/insu-04198250/file/gchron-5-301-2023.pdf https://doi.org/10.5194/gchron-5-301-2023 |
geographic |
Antarctic The Antarctic McMurdo Dry Valleys |
geographic_facet |
Antarctic The Antarctic McMurdo Dry Valleys |
genre |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
op_source |
EISSN: 2628-3697 Geochronology https://insu.hal.science/insu-04198250 Geochronology, 2023, 5, pp.301-321. ⟨10.5194/gchron-5-301-2023⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/gchron-5-301-2023 insu-04198250 https://insu.hal.science/insu-04198250 https://insu.hal.science/insu-04198250/document https://insu.hal.science/insu-04198250/file/gchron-5-301-2023.pdf BIBCODE: 2023GeChr.5.301B doi:10.5194/gchron-5-301-2023 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/gchron-5-301-2023 |
container_title |
Geochronology |
container_volume |
5 |
container_issue |
2 |
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301 |
op_container_end_page |
321 |
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1779310073825198080 |