Whole-rock chemical compositions of “tuffites” from the lower Cretaceous Wakino Subgroup, Kanmon Group in northern Kyushu

DOI IR HANDLE Web Site Web Site Open Access
  • YUHARA Masaki
    Kyushu Branch of the Association for the Geological Collaboration in Japan Department of Earth System Science, Faculty of Science, Fukuoka University
  • UMEZAKI Keiji
    Kitsuki City Board of Education
  • 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
  • 北部九州，下部白亜系脇野亜層群のいわゆる層灰岩の全岩化学組成
  • ホクブ キュウシュウ,カブ ハクアケイ ワキノアソウグン ノ イワユル ソウ カイガン ノ ゼン ガン カガク ソセイ
  • 砥石表面解析の方法と評価 : 考古資料を対象として
  • トイシ ヒョウメン カイセキ ノ ホウホウ ト ヒョウカ : コウコ シリョウ オ タイショウ ト シテ

Search this article

Abstract

<p>Major and trace elements analysis, rare earth element (REE) analysis were conducted on tuffites from the Wakino Subgroup, Kanmon Group in the eastern part of northern Kyushu. Tuffites are composed of interbeds of dark layers and light layers in thickness from several millimeters to several centimeters. The dark layers consist of mudstone to very fine sandstone. The light layers consist of mudstone to fine sandstone. Tuffites indicate high CaO and Sr contents than that of mudstone, sandstone and conglomerate in the Wakino Subgroup. Tuffite samples from the Murasaki and Kuro Rivers have similar whole-rock chemical compositions. Samples from the Yakiyama River, however, indicate lower TiO2 and Al2O3 contents and some lower Cr, Ga, Nb, Th and Zr contents than that of tuffites from the Murasaki and Kuro Rivers. There is no clear difference in REE patterns. Hence, these trace elements are effective for presumption of a place of production of tuffites.</p>

Journal

  • Earth Science (Chikyu Kagaku)

    Earth Science (Chikyu Kagaku) 74 (4), 157-170, 2020-10-25

    The Association for the Geological Collaboration in Japan

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top