U-Pb zircon ages of granitic rocks from Kagasawa, Hida Mountains

DOI Web Site Web Site 3 Citations 14 References
  • Takeuchi Makoto
    Department of Earth and Planetary Sciences, Graduate School of Environmental Studies, Nagoya University Research Institute of Geology and Geoinformation, Geological Survey of Japan, AIST
  • Shibata Ken
    2-16-18 Kurozasa-Izumi, Miyoshi, Aichi 470-0232, Japan
  • Jia Sui
    Department of Earth and Planetary Sciences, Graduate School of Environmental Studies, Nagoya University
  • Yamamoto Koshi
    Department of Earth and Planetary Sciences, Graduate School of Environmental Studies, Nagoya University

Bibliographic Information

Other Title
  • 飛驒山地加賀沢の花崗岩類のジルコンU-Pb年代
  • ヒダ サンチ カガ サワ ノ カコウガンルイ ノ ジルコン U-Pb ネンダイ

Search this article

Description

<p>Laser-ablation ICP-MS U−Pb dating was carried out on rock samples from granitic dikes of the Hida Metamorphic Belt at Kagasawa, Toyama City, where Precambrian Rb−Sr whole-rock ages disagree with Triassic (240-230 Ma) CHIME zircon ages. Two medium-grained granodiorite samples yielded zircon 238U-206Pb weighted mean ages of young age clusters of 241.3±3.0 Ma and 229.3±1.9 Ma, and a coarse-grained granite yielded a zircon 238U-206Pb weighted mean age of 241.4±2.0 Ma. These ages are similar to the CHIME zircon ages. The medium-grained granodiorites contain several Precambrian zircons with core ages of ca. 2500 Ma, 2000 Ma, and 1600 Ma. The coarse-grained granite, however, contains no older zircon.</p>

Journal

Citations (3)*help

See more

References(14)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top