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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
https://doi.org/10.18999/joueps.48.1c051ccd3-3372-4f76-87b9-c32f8e1b95d9
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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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 | |||||
言語 | en | |||||
著者 |
Dunkley, Daniel J.
× Dunkley, Daniel J.× Suzuki, Kazuhiro |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
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. | |||||
言語 | en | |||||
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。 | |||||
言語 | ja | |||||
内容記述タイプ | Other | |||||
出版者 | ||||||
言語 | en | |||||
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 | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
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 | PISSN | |||||
収録物識別子 | 0919875X | |||||
書誌情報 |
en : The Journal of earth and planetary sciences, Nagoya University 巻 48, p. 1-14, 発行日 2001 |
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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 |