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  1. B100 理学部/理学研究科
  2. B100b 紀要
  3. The Journal of earth and planetary sciences
  4. 48

Petrographically constrained CHIME dating of monazite from the Higo metamorphic terrane, Kyushu, Japan : preliminary results from metapelitic gneiss

https://doi.org/10.18999/joueps.48.1
c051ccd3-3372-4f76-87b9-c32f8e1b95d9
名前 / ファイル ライセンス アクション
KJ00000037613.pdf KJ00000037613.pdf (1.6 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2006-01-05
タイトル
タイトル Petrographically constrained CHIME dating of monazite from the Higo metamorphic terrane, Kyushu, Japan : preliminary results from metapelitic gneiss
著者 Dunkley, Daniel J.

× Dunkley, Daniel J.

WEKO 3362

Dunkley, Daniel J.

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Suzuki, Kazuhiro

× Suzuki, Kazuhiro

WEKO 3363

Suzuki, Kazuhiro

Search repository
抄録
内容記述 The chemical Th-U-total Pb isochron method (CHIME) was used to obtained in-situ age estimates of monazite in metapelitic granulite gneiss from the Higo metamorphic terrane of western central Kyushu, west Japan. The terrane comprises metasedimentary and igneous lithologies that underwent high-grade metamorphism during a tectonic event considered by previous authors to have occurred in either the mid Cretaceous or the Permian-Triassic period. Monazite grains in the analysed sample occur in textural equilibrium with the peak metamorphic assemblage spinel-sillimanite-garnet-plagioclase-biotite, and are oriented parallel to a strong mineral foliation and gneissosity that was developed during peak metamorphism. This monazite yielded a CHIME age of 108±12Ma. Garnet grains also contain monazite grains as inclusions, which yield similar CHIME ages to the oriented monazite. On the basis of such petrographic evidence, the age estimates are interpreted as representing the time of peak metamorphism and deformation. This estimate is contrary to studies which suggest that the gneisses formed during the Permian-Triassic and that Cretaceous age estimates reflect isotopic resetting during the intrusion of an adjacent granitoid.
内容記述タイプ Abstract
内容記述
内容記述 国立情報学研究所で電子化したコンテンツを使用している。
内容記述タイプ Other
出版者
出版者 Dept. of Earth and Planetary Sciences, Nagoya University
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
ID登録
ID登録 10.18999/joueps.48.1
ID登録タイプ JaLC
ISSN(print)
収録物識別子タイプ ISSN
収録物識別子 0919875X
書誌情報 The Journal of earth and planetary sciences, Nagoya University

巻 48, p. 1-14, 発行日 2001
フォーマット
application/pdf
著者版フラグ
値 publisher
URI
識別子 http://hdl.handle.net/2237/2851
識別子タイプ HDL
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