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 |
---|---|
Main Authors: | , , , , , , , , |
Format: | Text |
Language: | unknown |
Published: |
DigitalCommons@URI
2008
|
Subjects: | |
Online Access: | https://digitalcommons.uri.edu/gsofacpubs/438 https://doi.org/10.1029/2007PA001478 https://digitalcommons.uri.edu/context/gsofacpubs/article/1409/viewcontent/Backman_etal_BerylliumIsotopes_2008.pdf |
id |
ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-1409 |
---|---|
record_format |
openpolar |
spelling |
ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-1409 2023-07-30T04:00:36+02:00 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 W. Haley, Brian A. Kubik, Peter W. Garbe-Schönberg, Dieter 2008-01-01T08:00:00Z application/pdf https://digitalcommons.uri.edu/gsofacpubs/438 https://doi.org/10.1029/2007PA001478 https://digitalcommons.uri.edu/context/gsofacpubs/article/1409/viewcontent/Backman_etal_BerylliumIsotopes_2008.pdf unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/438 doi:10.1029/2007PA001478 https://digitalcommons.uri.edu/context/gsofacpubs/article/1409/viewcontent/Backman_etal_BerylliumIsotopes_2008.pdf Graduate School of Oceanography Faculty Publications text 2008 ftunivrhodeislan https://doi.org/10.1029/2007PA001478 2023-07-17T18:57:04Z 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. Text Arctic Arctic Ocean Lomonosov Ridge Sea ice University of Rhode Island: DigitalCommons@URI Arctic Arctic Ocean Paleoceanography 23 1 n/a n/a |
institution |
Open Polar |
collection |
University of Rhode Island: DigitalCommons@URI |
op_collection_id |
ftunivrhodeislan |
language |
unknown |
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 |
Text |
author |
Frank, Martin Backman, Jan Jakobsson, Martin Moran, Kate O'Regan, Matthew King, John W. Haley, Brian A. Kubik, Peter W. Garbe-Schönberg, Dieter |
spellingShingle |
Frank, Martin Backman, Jan Jakobsson, Martin Moran, Kate O'Regan, Matthew King, John W. Haley, Brian A. Kubik, Peter W. Garbe-Schönberg, 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 W. Haley, Brian A. Kubik, Peter W. Garbe-Schönberg, 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 |
DigitalCommons@URI |
publishDate |
2008 |
url |
https://digitalcommons.uri.edu/gsofacpubs/438 https://doi.org/10.1029/2007PA001478 https://digitalcommons.uri.edu/context/gsofacpubs/article/1409/viewcontent/Backman_etal_BerylliumIsotopes_2008.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Lomonosov Ridge Sea ice |
genre_facet |
Arctic Arctic Ocean Lomonosov Ridge Sea ice |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/438 doi:10.1029/2007PA001478 https://digitalcommons.uri.edu/context/gsofacpubs/article/1409/viewcontent/Backman_etal_BerylliumIsotopes_2008.pdf |
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_ |
1772811122039062528 |