宇和海表層堆積物の地球化学的特徴 Geochemical properties of surface sediments in Uwakai Sea

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抄録

Chemical compositions of cored sea floor sediments from six stations (Yawatahama, Mikame, Hoketsu, Uwajima, Shitaba and Kitanada Bays) in Uwakai Sea along the western part of the Shikoku Island were analysed by instrumental neutron activation analyses, in order to evaluate influences of inflow materials from geological hinterland and human pollution. Scandium, chromium, iron and cobalt contents in the sediments from the Yawatahama and Mikame Bays, which locate to the northern part of the Uwakai Sea, are obviously high compared with that from other stations. This is strongly depended on the materials from geological hinterland. Mafic rocks including higher contents of such elements belong to the Sambagawa and Mikabu belts distributed in the area. By weathering of the rocks, the constituting particles directly deposit to the sea floor in the bay areas. On the other hand, zinc content of the sediments from the Yawatahama and Uwajima Bays is two times as large as that of the normal sediments. This may be caused by human pollution, because the twobays face to urban areas in the Uwakai Sea region. However, further examination is necessary to that the possibility of human influences, based on the genesis of sulfide in diatom and relationship between zinc and total organic carbon contents.

収録刊行物

  • 愛媛大学教育学部紀要. 第III部, 自然科学

    愛媛大学教育学部紀要. 第III部, 自然科学 23(1), 13-24, 2002-09-20

    愛媛大学

各種コード

  • NII論文ID(NAID)
    110000046005
  • NII書誌ID(NCID)
    AN00024797
  • 本文言語コード
    JPN
  • 資料種別
    Departmental Bulletin Paper
  • 雑誌種別
    大学紀要
  • ISSN
    02850052
  • NDL 記事登録ID
    6560905
  • NDL 雑誌分類
    ZM2(科学技術--科学技術一般--大学・研究所・学会紀要)
  • NDL 請求記号
    Z14-851
  • データ提供元
    NDL  NII-ELS  IR 
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