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    Orogenic paleofluid flow recorded by discordant detrital zircons in the Caledonian foreland basin of northern Greenland

    Access Status
    Fulltext not available
    Authors
    Morris, G.
    Kirkland, Chris
    Pease, V.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Morris, G. and Kirkland, C. and Pease, V. 2015. Orogenic paleofluid flow recorded by discordant detrital zircons in the Caledonian foreland basin of northern Greenland. Lithosphere. 7 (2): pp. 138-143.
    Source Title
    Lithosphere
    DOI
    10.1130/L420.1
    ISSN
    1941-8264
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/30926
    Collection
    • Curtin Research Publications
    Abstract

    Concordant detrital zircon dates from Neoproterozoic to Paleozoic continental slope and trough deposits in northern Greenland indicate Late Archean and Paleoproterozoic sediment sources. Significant numbers of dates are, however, discordant and, together with a few apparently concordant dates, give ages younger than the depositional ages of overlying fossiliferous sediments. The discordance pattern implies partial or total radiogenic-Pb loss during the Middle Devonian, possibly facilitated by postdepositional fluid movement. Such timing of radiogenic-Pb loss is supported by results from a novel modeling method, which indicate that the greatest statistical similarity between concordant and discordant detrital populations occurs when Pb loss is constrained to the interval of 380–390 Ma, i.e., long after deposition. This radiogenic-Pb loss event is interpreted to reflect fluid flow associated with Caledonian orogenic uplift to the east.

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