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MAGNETO-BIOSTRATIGRAPHY OF UPPER CRETACEOUS SYSTEM IN JAPAN

Research Project

Project/Area Number 08640592
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Stratigraphy/Paleontology
Research InstitutionKOCHI UNIVERSITY

Principal Investigator

KODAMA Kazuto  Kochi Univ., Dept., of Geology, Professor, 理学部, 教授 (00153560)

Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1997: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
KeywordsMAGNETOSTRATIGRAPHY / UPPER CRETACEOUS / HOKKAIDO / KYUSHU / YEZO GROUP / POLARITY CHRON / BIOSTRATIGRAPHY
Research Abstract

A line of magnetostratigraphic studies were done focusing on the upper Cretaceous Yezo Group in central Hokkaido. Four magnetozones of normal or reversed polarity were recognized from the upper part of the Osoushinai Formation distributed along the Abeshinai River and its tributaries in Teshio-Nakagawa area. In addition, a pair of normal and reversed polarity magnetozones were recognizable from the uppermost Haborogawa Formation in Haboro area. Comparison of these magnetozones with a geomagnetic polarity time scale led to a possible magnetic polarity interpretation that the four magnetozones could be correlated from top to bottom to the late Cretaceous magnetic polarity chrons C32r.1r, C32r.1n, C32r.2r, and C33n. In terms of macro-fossil stratigraphy, the Sphenoceramus schmidti zone is correlated to polarity chron C32r.1r, the Sphenoceramus orientalis zone to C32r.1n, and the upper part of the Polyptychoceras pseudogaultinum zone to C32r.2r.
Paleomagnetic studies were also conducted for the upper Cretaceous strata in Kyushu including the Goshoura Group, the Mifune Group, the Ohnogawa Group, and the upper Konmon Group. All these strata are of normal polarity correlatable to the Cretaceous long normal polarity chron, C34n.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 小玉 一人: "白亜紀の古地磁気を求めてサハリンへ" 国立科学博物館ニュース. 333. 8-9 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 酒井 豊三郎 他9名: "ニュージーランド北島の保存良好な放散虫化石を産する中生代リン酸及び石灰質ノジュール" 地質学雑誌. 104. 5-6 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kodama, K., et al.: "Magnetostratigraphy of Upper Cretaceous strata in South Sakhalin,Russia" Cretaceous Research. (印刷中). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 小玉 一人, 武田 哲一: "御所浦島の地質-第6章" 御所浦町全島博物館構想推進協議会, 120 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kodama, K.: "Visit to Sakhalin for studies of Cretaceous geomagnetism." National Science Museum News. 333. 8-9 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Sakai, T., Aida, Y., Higuchi, Y., Hori, R., Kodama, K., Takemura, A., Campbell, H.J., Grant-Mackie, J.A.Hollis, C.J., Sporli, K.B.: "Mesozoic phosphatic and calcareous nodules containing well-preserved radiolarian fauna from the North Island, New Zealand." Journal of the Geological Society of Japan. 104. V-VI (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kodama, K., Maeda, H., Shigeta, Y., Kase, T., and Takeuchi, T.: "Magnetostratigraphy of Upper Cretaceous strata in South Sakhalin, Russian Far East." Cretaceous Research. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kodama, K.and Takeda, T.: Geology of Goshoura Island, chapter 6. Paleomagnetism of the Cretaceous Goshoura Group in Goshoura Island, Kyushu, Southwest Japan., 120 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kodama,K.et al.: "Magnotostratigraphy of Upper Crotaceous strata in South Sakhaliu,Russia" GEOLOGY. 25(印刷中). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 小玉一人・武田哲一: "御所浦島の地質(第6章)" 御所浦町全島博物館構想推進協議会, 120 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 小玉一人: "白亜紀の古地磁気を求めてサハリンへ" 国立科学博物館ニュース. 333. 8-9 (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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