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

DOI

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.

Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150

Supplement to: 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): Age model and core-seismic integration for the Cenozoic Arctic Coring Expedition sediments from the Lomonosov Ridge. Paleoceanography, 23(1), PA1S03

Identifier
DOI https://doi.org/10.1594/PANGAEA.706556
Related Identifier https://doi.org/10.1029/2007PA001476
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.706556
Provenance
Creator Backman, Jan; Jakobsson, Martin ORCID logo; Frank, Martin ORCID logo; Sangiorgi, Francesca ORCID logo; Brinkhuis, Henk ORCID logo; Stickley, Catherine E; O'Regan, Matthew; Løvlie, Reidar; Pälike, Heiko ORCID logo; Spofforth, David J A; Gattacceca, Jérôme; Moran, Kathryn; King, John W; Heil, Chip
Publisher PANGAEA
Publication Year 2008
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 3 datasets
Discipline Earth System Research
Spatial Coverage (136.177W, 87.867S, 139.365E, 87.921N); Arctic Ocean
Temporal Coverage Begin 2004-08-19T00:00:00Z
Temporal Coverage End 2004-08-27T00:00:00Z