Concordance between K-Ar ages of K-feldspar and fission-track ages of zircon in Cretaceous granitic rocks from Japan

K. Shibata, T. Danhara, Hideo Takagi

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    The closure temperature for zircon in the fission-track dating has been poorly estimated because of interpolation between minerals with very different closure temperatures. We find that K-Ar ages and fission-track ages of coexisting K-feldspars and zircons in Cretaceous granitic rocks from Japan are concordant with the experimental errors, with the exception of a few cataclastically deformed samples near the Median Tectonic Line. The concordance between the two systems suggests that the closure temperature for zircon in the fission-track system may be lower than 200°C. -Authors

    Original languageEnglish
    Pages (from-to)187-192
    Number of pages6
    JournalGeochemical Journal
    Volume24
    Issue number3
    Publication statusPublished - 1990

    Fingerprint

    closure temperature
    closures
    fission
    feldspar
    Japan
    zircon
    Rocks
    rocks
    Cretaceous
    rock
    fission track dating
    feldspars
    Tectonics
    dating
    Temperature
    Minerals
    interpolation
    temperature
    tectonics
    Interpolation

    ASJC Scopus subject areas

    • Geochemistry and Petrology
    • Geophysics

    Cite this

    Concordance between K-Ar ages of K-feldspar and fission-track ages of zircon in Cretaceous granitic rocks from Japan. / Shibata, K.; Danhara, T.; Takagi, Hideo.

    In: Geochemical Journal, Vol. 24, No. 3, 1990, p. 187-192.

    Research output: Contribution to journalArticle

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    AB - The closure temperature for zircon in the fission-track dating has been poorly estimated because of interpolation between minerals with very different closure temperatures. We find that K-Ar ages and fission-track ages of coexisting K-feldspars and zircons in Cretaceous granitic rocks from Japan are concordant with the experimental errors, with the exception of a few cataclastically deformed samples near the Median Tectonic Line. The concordance between the two systems suggests that the closure temperature for zircon in the fission-track system may be lower than 200°C. -Authors

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