Comparison of whole-rock chemical compositions of “tuffites” from the lower Cretaceous Wakino Subgroup, Kanmon Group in northern Kyushu and from the Jinju Formation, Sindong Group, Gyeongsang Supergroup in southeastern Korean Peninsula

DOI
  • YUHARA Masaki
    Kyushu Branch of the Association for the Geological Collaboration in Japan, Faculty of Science, Fukuoka University
  • UMEZAKI Keiji
    The University of Kitakyushu
  • MORI Takanori
    Center for Transdisciplinary Research, Institute for Research Promotion, Niigata University
  • KAWANO Yoshinobu
    Department of Environment Systems, Faculty of Geo-environmental Science, Rissho University

Bibliographic Information

Other Title
  • 下部白亜系脇野亜層群と慶尚超層群新洞層群の層灰岩の全岩化学組成の比較

Abstract

<p>Major and trace elements analysis and rare earth elements (REE) analysis were conducted on tuffites from the Wakino Subgroup, Kanmon Group in the eastern part of northern Kyushu, and from the Jinju Formation, Sindong Group, Gyeongsang Supergroup in the southeastern part of Korean Peninsula. Tuffite samples from the Wakino Subgroup in the Murasaki and Kuro Rivers area indicate lower Cr, Nb, Ni, Th and Zr contents, higher Sr contents and some higher V contents than that of Mt.Uibon-san area in the Korean Peninsula. Tuffites show the patterns rich in light REE, poor and flat in heavy REE. Altough tuffites from the Yakiyama River area show positive and negative Eu anomaly, tuffites from the Murasaki and Kuro Rivers area and Mt. Uibon-san area show negative Eu anomaly. We proposed four discrimination triangle diagrams: Cr-V-Rb diagram, Sr-V-10Th diagram, Ga-Th-Pb diagram, 10Ni-10Th-Sr diagram, and discrimination total REE variation diagram for source region of tuffite. Stone tools from the Kifune Shrine are plotted in the Wakino Subgroup field in those discrimination diagrams. </p>

Journal

  • Earth Science (Chikyu Kagaku)

    Earth Science (Chikyu Kagaku) 76 (4), 221-235, 2022-10-25

    The Association for the Geological Collaboration in Japan

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