Timing of metamorphism and formation of garnet granite in the Kontum Massif, central Vietnam: Evidence from monazite EMP dating

  • OWADA Masaaki
    Department of Earth Sciences, Faculty of Science, Yamaguchi University
  • OSANAI Yasuhito
    Division of Evolution of Earth Environments, Graduate School of Social and Cultural Studies, Kyushu University
  • HOKADA Tomokazu
    National Institute of Polar Research
  • NAKANO Nobuhiko
    Division of Evolution of Earth Environments, Graduate School of Social and Cultural Studies, Kyushu University

抄録

Garnet-bearing granite (Grt-granite) and high-grade pelitic gneisses occur in the Kannak Complex, southern Kontum Massif, central Vietnam. Electron microprobe (EMP) dating of monazite in Grt-granite and garnet-orthopyroxene gneiss (Grt-Opx gneiss) gave ages of ca. 260 Ma from cores and ca. 230 Ma from thin rims. Since most monazite grains are predominately of core composition, the ca. 260 Ma age indicates the timing of high-temperature metamorphism and the formation of Grt-granite. Grt-granite is locally accompanied by coeval intrusions of fine-grained gabbro, which is a candidate for the heat source leading to high-grade metamorphism and partial melting of the crust during the Late Permian.

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詳細情報

  • CRID
    1390282681522740864
  • NII論文ID
    130000254255
  • DOI
    10.2465/jmps.060617a
  • ISSN
    13493825
    13456296
  • 本文言語コード
    en
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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