北海道中央部, 中新統上杵臼層の珪藻化石年代(前期中新世末期)とその意義 A latest Early Miocene diatom age of the Kamikineusu Formation, southern central Hokkaido, Japan, and its implications for geological history

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著者

    • 黒田 智子 Kuroda Tomoko
    • 千葉大学理学部地球科学教室:(現)大和探査技術(株) Department of Earth Sciences, Faculty of Science, Chiba University:(Present address)Daiwa Exploration & Consulting Co., Ltd.,
    • 浅野 裕史 [他] Asano Hirofumi
    • 千葉大学理学部地球科学教室:(現)佐原市立佐原中学校 Department of Earth Sciences, Faculty of Science, Chiba University:(Present address)Sawara Junior High School
    • 伊藤 谷生 Ito Tanio
    • 千葉大学理学部地球科学教室 Department of Earth Sciences, Faculty of Science, Chiba University

抄録

Diatom assemblages indicative of the lower part of the Crucidenticula kanayae Zone were found in three carbonate concretions collected from the basal part of the Miocene Kamikineusu Formation in southern central Hokkaido. In spite of the fact that the formation has been correlated with the Middle Miocene Kawabata Formation in central Hokkaido on the basis of molluscan evidence, the diatom analysis clarified that the geologic age of the basal part of the formation is 16.9 to 16.7 Ma, latest Early Miocene. The new age data of the Kamikineusu Formation provides some geochronological constraints on the geological history in southern central Hokkaido. Firstly, in the southern part of the Hidaka belt, a part of the Hidaka Supergroup became exposed by an uplift by the latest Early Miocene. Secondly, a transgression occurred in the latest Early Miocene when the sedimentary basin of the Kamikineusu Formation was formed. Thirdly, at least the basal part of the Kamikineusu Formation is correlated with the Takinoue Formation in the Yubari district.

収録刊行物

  • 地質學雜誌

    地質學雜誌 105(8), 589-592, 1999-08-15

    日本地質学会

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被引用文献:  6件中 1-6件 を表示

各種コード

  • NII論文ID(NAID)
    110003013056
  • NII書誌ID(NCID)
    AN00141768
  • 本文言語コード
    JPN
  • 資料種別
    SHO
  • ISSN
    00167630
  • NDL 記事登録ID
    4841727
  • NDL 雑誌分類
    ZM49(科学技術--地球科学--地質)
  • NDL 請求記号
    Z15-174
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  J-STAGE 
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