Age model and core-seismic integration for the Cenozoic Arctic Coring Expedition sediments from the Lomonosov Ridge

Jan Backman*, Martin Jakobsson, Martin Frank, Francesca Sangiorgi, Henk Brinkhuis, Catherine Stickley, Matthew O'Regan, Reidar Løvlie, Heiko Pälike, David Spofforth, Jérôme Gattacecca, Kate Moran, John King, Chip Heil

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    Abstract

    Cenozoic biostratigraphic, cosmogenic isotope, magnetostratigraphic, and cyclostratigraphic data derived from Integrated Ocean Drilling Program Expedition 302, the Arctic Coring Expedition (ACEX), are merged into a coherent age model. This age model has low resolution because of poor core recovery, limited availability of biostratigraphic information, and the complex nature of the magnetostratigraphic record. One 2.2 Ma long hiatus occurs in the late Miocene; another spans 26 Ma (18.2-44.4 Ma). The average sedimentation rate in the recovered Cenozoic sediments is about 15 m/Ma. Core-seismic correlation links the ACEX sediments to the reflection seismic stratigraphy of line AWI-91090, on which the ACEX sites were drilled. This seismostratigraphy can be correlated over wide geographic areas in the central Arctic Ocean, implying that the ACEX age model can be extended well beyond the drill sites.

    Original languageEnglish
    Article numberPA1S03
    JournalPaleoceanography
    Volume23
    Issue number1
    DOIs
    Publication statusPublished - 1 Mar 2008

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