Protolith age and metamorphic temperature of the Yokokawagawa metamorphic rocks in Nagano Prefecture, central Japan, and comparison with the Sanbagawa metamorphic rocks

DOI Web Site 被引用文献1件 参考文献35件
  • MORI Hiroshi
    Department of Geology, Faculty of Science, Shinshu University
  • TOKIWA Tetsuya
    Department of Geology, Faculty of Science, Shinshu University
  • MIZUMURA Hiroki
    Department of Geology, Faculty of Science, Shinshu University Kyowa Sekkei Co., Ltd.
  • YOSHIKAWA Kohei
    Department of Geology, Faculty of Science, Shinshu University
  • NOBE Yuki
    Department of Geology, Faculty of Science, Shinshu University Electric Power Development Co., Ltd.
  • KOUKETSU Yui
    Graduate School of Environmental Studies, Nagoya University

書誌事項

公開日
2023
資源種別
journal article
DOI
  • 10.2465/jmps.221215
公開者
一般社団法人　日本鉱物科学会

この論文をさがす

説明

<p>We estimated the protolith age and peak metamorphic temperature of the Yokokawagawa metamorphic rocks (YMR) east of the Itoigawa-Shizuoka Tectonic Line using detrital zircon U-Pb dating and Raman carbonaceous material geothermometry, respectively. U-Pb dating of a psammitic rock yielded a youngest age of ∼ 100 Ma, which corresponds to the protolith age. Raman carbonaceous material geothermometry results for five pelitic rock samples give metamorphic temperatures of ∼ 350-380 °C. The protolith age is consistent with those of the Sanbagawa metamorphic rocks (SMR), strongly indicating that the YMR are an extension of the SMR. The increase in peak temperature toward intrusive rocks along the eastern margin of the YMR may indicate that the relatively young ages yielded by previous K-Ar dating of the YMR reflect thermal resetting due to contact metamorphism.</p>

収録刊行物

被引用文献 (1)*注記

もっと見る

参考文献 (35)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ