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

Ken Shibata, Tohru 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 con-cordant within 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.

Original languageEnglish
Pages (from-to)187-192
Number of pages6
JournalGEOCHEMICAL JOURNAL
Volume24
Issue number3
DOIs
Publication statusPublished - 1990 Jan 1

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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