Beryllium isotopes in central Arctic Ocean sediments over the past 12.3 million years: Stratigraphic and paleoclimatic implications
The upper 200 m of the sediments recovered during IODP Leg 302, the Arctic Coring Expedition (ACEX), to the Lomonosov Ridge in the central Arctic Ocean consist almost exclusively of detrital material. The scarcity of biostratigraphic markers severely complicates the establishment of a reliable chron...
Published in: | Paleoceanography |
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Language: | English |
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AGU (American Geophysical Union)
2008
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Online Access: | https://oceanrep.geomar.de/id/eprint/2225/ https://oceanrep.geomar.de/id/eprint/2225/1/71_Frank_2008_BerylliumIsotopesInCentralArctic_Artzeit_pubid9077.pdf https://doi.org/10.1029/2007PA001478 |
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ftoceanrep:oai:oceanrep.geomar.de:2225 2024-09-15T17:51:05+00:00 Beryllium isotopes in central Arctic Ocean sediments over the past 12.3 million years: Stratigraphic and paleoclimatic implications Frank, Martin Backman, Jan Jakobsson, Martin Moran, Kate O'Regan, Matthew King, John Haley, Brian Kubik, Peter W. Garbe-Schönberg, C.-Dieter 2008 text https://oceanrep.geomar.de/id/eprint/2225/ https://oceanrep.geomar.de/id/eprint/2225/1/71_Frank_2008_BerylliumIsotopesInCentralArctic_Artzeit_pubid9077.pdf https://doi.org/10.1029/2007PA001478 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/2225/1/71_Frank_2008_BerylliumIsotopesInCentralArctic_Artzeit_pubid9077.pdf Frank, M. , Backman, J., Jakobsson, M., Moran, K., O'Regan, M., King, J., Haley, B., Kubik, P. W. and Garbe-Schönberg, C. D. (2008) Beryllium isotopes in central Arctic Ocean sediments over the past 12.3 million years: Stratigraphic and paleoclimatic implications. Open Access Paleoceanography, 23 (PA1S03). DOI 10.1029/2007PA001478 <https://doi.org/10.1029/2007PA001478>. doi:10.1029/2007PA001478 info:eu-repo/semantics/openAccess Article PeerReviewed 2008 ftoceanrep https://doi.org/10.1029/2007PA001478 2024-09-04T05:04:40Z The upper 200 m of the sediments recovered during IODP Leg 302, the Arctic Coring Expedition (ACEX), to the Lomonosov Ridge in the central Arctic Ocean consist almost exclusively of detrital material. The scarcity of biostratigraphic markers severely complicates the establishment of a reliable chronostratigraphic framework for these sediments, which contain the first continuous record of the Neogene environmental and climatic evolution of the Arctic region. Here we present profiles of cosmogenic 10Be together with the seawater-derived fraction of stable 9Be obtained from the ACEX cores. The down-core decrease of 10Be/9Be provides an average sedimentation rate of 14.5 ± 1 m/Ma for the uppermost 151 m of the ACEX record and allows the establishment of a chronostratigraphy for the past 12.3 Ma. The age-corrected 10Be concentrations and 10Be/9Be ratios suggest the existence of an essentially continuous sea ice cover over the past 12.3 Ma. Article in Journal/Newspaper Arctic Arctic Ocean Lomonosov Ridge Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Paleoceanography 23 1 n/a n/a |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The upper 200 m of the sediments recovered during IODP Leg 302, the Arctic Coring Expedition (ACEX), to the Lomonosov Ridge in the central Arctic Ocean consist almost exclusively of detrital material. The scarcity of biostratigraphic markers severely complicates the establishment of a reliable chronostratigraphic framework for these sediments, which contain the first continuous record of the Neogene environmental and climatic evolution of the Arctic region. Here we present profiles of cosmogenic 10Be together with the seawater-derived fraction of stable 9Be obtained from the ACEX cores. The down-core decrease of 10Be/9Be provides an average sedimentation rate of 14.5 ± 1 m/Ma for the uppermost 151 m of the ACEX record and allows the establishment of a chronostratigraphy for the past 12.3 Ma. The age-corrected 10Be concentrations and 10Be/9Be ratios suggest the existence of an essentially continuous sea ice cover over the past 12.3 Ma. |
format |
Article in Journal/Newspaper |
author |
Frank, Martin Backman, Jan Jakobsson, Martin Moran, Kate O'Regan, Matthew King, John Haley, Brian Kubik, Peter W. Garbe-Schönberg, C.-Dieter |
spellingShingle |
Frank, Martin Backman, Jan Jakobsson, Martin Moran, Kate O'Regan, Matthew King, John Haley, Brian Kubik, Peter W. Garbe-Schönberg, C.-Dieter Beryllium isotopes in central Arctic Ocean sediments over the past 12.3 million years: Stratigraphic and paleoclimatic implications |
author_facet |
Frank, Martin Backman, Jan Jakobsson, Martin Moran, Kate O'Regan, Matthew King, John Haley, Brian Kubik, Peter W. Garbe-Schönberg, C.-Dieter |
author_sort |
Frank, Martin |
title |
Beryllium isotopes in central Arctic Ocean sediments over the past 12.3 million years: Stratigraphic and paleoclimatic implications |
title_short |
Beryllium isotopes in central Arctic Ocean sediments over the past 12.3 million years: Stratigraphic and paleoclimatic implications |
title_full |
Beryllium isotopes in central Arctic Ocean sediments over the past 12.3 million years: Stratigraphic and paleoclimatic implications |
title_fullStr |
Beryllium isotopes in central Arctic Ocean sediments over the past 12.3 million years: Stratigraphic and paleoclimatic implications |
title_full_unstemmed |
Beryllium isotopes in central Arctic Ocean sediments over the past 12.3 million years: Stratigraphic and paleoclimatic implications |
title_sort |
beryllium isotopes in central arctic ocean sediments over the past 12.3 million years: stratigraphic and paleoclimatic implications |
publisher |
AGU (American Geophysical Union) |
publishDate |
2008 |
url |
https://oceanrep.geomar.de/id/eprint/2225/ https://oceanrep.geomar.de/id/eprint/2225/1/71_Frank_2008_BerylliumIsotopesInCentralArctic_Artzeit_pubid9077.pdf https://doi.org/10.1029/2007PA001478 |
genre |
Arctic Arctic Ocean Lomonosov Ridge Sea ice |
genre_facet |
Arctic Arctic Ocean Lomonosov Ridge Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/2225/1/71_Frank_2008_BerylliumIsotopesInCentralArctic_Artzeit_pubid9077.pdf Frank, M. , Backman, J., Jakobsson, M., Moran, K., O'Regan, M., King, J., Haley, B., Kubik, P. W. and Garbe-Schönberg, C. D. (2008) Beryllium isotopes in central Arctic Ocean sediments over the past 12.3 million years: Stratigraphic and paleoclimatic implications. Open Access Paleoceanography, 23 (PA1S03). DOI 10.1029/2007PA001478 <https://doi.org/10.1029/2007PA001478>. doi:10.1029/2007PA001478 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2007PA001478 |
container_title |
Paleoceanography |
container_volume |
23 |
container_issue |
1 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1810292895741116416 |