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    The use of detrital zircon data in terrane analysis: A nonunique answer to provenance and tectonostratigraphic position in the Scandinavian Caledonides

    Access Status
    Open access via publisher
    Authors
    Slagstad, T.
    Kirkland, Chris
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Slagstad, T. and Kirkland, C. 2017. The use of detrital zircon data in terrane analysis: A nonunique answer to provenance and tectonostratigraphic position in the Scandinavian Caledonides. Lithosphere. 9 (6): pp. 1002-1011.
    Source Title
    Lithosphere
    DOI
    10.1130/L663.1
    ISSN
    1941-8264
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/61538
    Collection
    • Curtin Research Publications
    Abstract

    The Scandinavian Caledonides are conventionally described as a stack of parautochthonous to allochthonous nappes with more exotic units residing at structurally higher levels, from Baltica derived at the base to Laurentia derived at the top. Detrital zircon geochronology has been increasingly used for determining provenance and, by implication, tectonostratigraphic position. We present detrital zircon U-Pb-Hf results from the structurally highest, inferred Laurentia-derived Uppermost Allochthon. The data from the Uppermost Allochthon are statistically indistinguishable from those of the Lower and Middle Allochthons, and from other Neoproterozoic and younger metasediments around the North Atlantic. Detrital zircon U-Pb ages and Lu-Hf compositions fail the test of paleogeographic uniqueness, which is a prerequisite for using this tool to distinguish Laurentian from Baltican provenance, and therefore it cannot be used to infer tectonostratigraphic position.

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