Lower Eocene to Lower Miocene stratigraphy and paleoenvironment of ODP Site 643A, Norwegian Sea

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    Abstract

    The focus of this study is the lower Eocene to lower Miocene succession in ODP Site 643A. The site is located in the Norwegian Sea, at the base of the Outer Vøring Plateau (OVP). We analysed dinocyst assemblages and calculated the relative input of soil organic matter using an organic proxy, the branched/isoprenoid tetraether (BIT) index. Our results suggest outer neritic or oceanic conditions during the deposition of the studied succession, and a progressive submerging of the OVP. A transition from a stratified oxygen-depleted water column into a mixed and well-oxygenated column is observed at ~41.2 Ma and might be connected with subsidence of the OVP. The variations in dinocyst abundance indicate that there was a connected surface water circulation within the Norwegian–Greenlandic Sea in the latest Lutetian. Our record also suggests that there was a good surface water exchange between the Norwegian Sea and the North Sea Basin during the earliest Oligocene and at the Oligocene–Miocene transition.

    Original languageEnglish
    Title of host publicationSTRATI 2013. First International Congress on Stratigraphy At the Cutting Edge of Stratigraphy
    EditorsRogério Rocha, João Pais, José Carlos Kullberg, Stanley Finney
    PublisherSpringer
    Pages143-147
    Number of pages5
    ISBN (Electronic)978-3-319-04364-7
    ISBN (Print)978-3-319-04363-0
    DOIs
    Publication statusPublished - 2014
    EventSTRATI 2013: 1st International Congress on Stratigraphy At the Cutting Edge of Stratigraphy - Lisbon, Portugal
    Duration: 1 Jul 20137 Jul 2013

    Publication series

    SeriesSpringer Geology
    ISSN2197-9545

    Conference

    ConferenceSTRATI 2013: 1st International Congress on Stratigraphy At the Cutting Edge of Stratigraphy
    CityLisbon, Portugal
    Period1/07/137/07/13

    Keywords

    • BIT
    • Dinocysts
    • Norwegian Sea
    • ODP Site 643A
    • Palaeoenvironment
    • Palaeogene

    Programme Area

    • Programme Area 3: Energy Resources
    • Programme Area 5: Nature and Climate

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