Age control and stratigraphy of a sediment profile from the Lomonosov Ridge, Arctic Ocean

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.

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Backman, Jan, Jakobsson, Martin, Frank, Martin, Sangiorgi, Francesca, Brinkhuis, Henk, Stickley, Catherine E, O'Regan, Matthew, Løvlie, Reidar, Pälike, Heiko, Spofforth, David J A, Gattacceca, Jérôme, Moran, Kathryn, King, John W, Heil, Chip (2008). Dataset: Age control and stratigraphy of a sediment profile from the Lomonosov Ridge, Arctic Ocean. https://doi.org/10.1594/PANGAEA.706556

DOI retrieved: 2008

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.706556
Author Backman, Jan
Given Name Jan
Family Name Backman
More Authors
Jakobsson, Martin
Frank, Martin
Sangiorgi, Francesca
Brinkhuis, Henk
Stickley, Catherine E
O'Regan, Matthew
Løvlie, Reidar
Pälike, Heiko
Spofforth, David J A
Gattacceca, Jérôme
Moran, Kathryn
King, John W
Heil, Chip
Source Creation 2008
Publication Year 2008
Resource Type application/zip - filename: backmann_2008
Subject Areas
Name: Lithosphere

Name: Oceans

Name: Paleontology

Related Identifiers
Title: Age model and core-seismic integration for the Cenozoic Arctic Coring Expedition sediments from the Lomonosov Ridge
Identifier: https://doi.org/10.1029/2007PA001476
Type: DOI
Relation: IsSupplementTo
Year: 2008
Source: Paleoceanography
Authors: Backman Jan , Jakobsson Martin , Frank Martin , Sangiorgi Francesca , Brinkhuis Henk , Stickley Catherine E , O'Regan Matthew , Løvlie Reidar , Pälike Heiko , Spofforth David J A , Gattacceca Jérôme , Moran Kathryn , King John W , Heil Chip .