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Neogene planktonic foraminiferal biostratigraphy of the northern coast of Suruga Bay and Izu Peninsula

Research Project

Project/Area Number 61540570
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Stratigraphy/Paleontology
Research InstitutionShizuoka University

Principal Investigator

IBARAKI Masako  Research Associate, Faculty of Science, Shizuoka University, 理学部, 助手 (30109128)

Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1987: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1986: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsFossa Magna / Suruga Bay / Neogene / Planktonic foraminifera / biostratigraphy / geologic age / 地塊 / 褶曲 / フォッサマグナ
Research Abstract

In this study, planktonic foraminiferal biostratigraphy of Neogene sequences on the northern coast of Suruga Bay and Izu Peninsula is examined.
As the strata on the northern coast of Suruga Bay have strongly been affected by neotectnics of the Fossa Magna, various methods for hard rock samples utilizing Kalibor, Sodium chloride and vacuum oven were tried to examination of planktonic foraminifera.
As a result, following new data on planktonic foraminiferal age-assignments of sequences of the area could be obtained. From occurrences of age-diagnostic species, the Shizuoka, Wadajima and the Kawaino Groups are assigned to N.17 of late Miocene age. These three groups are included in a same interval. The Kogochi Group corresponds to N.17b-18 of late Miocene to early Pliocene age, the Seikenji Group to N.19 of Pliocene age, and the Hamaishidake Group to N.21 of Pliocene age.
In Izu Peninsula, some new data on planktonic foraminiferal biostratigraphy could be obtained. Based upon occurrences of age-diagnostic species in an outcrop near the Yugashima Spa, a part of the Yugashima Group is assigned to N.8 of the latest Early Miocene age. Some Pliocene sequences of the Shirahama Group are found exposed on hill tops of about 400-500m above sea level in the central part of Izu Peninsula, which suggest an upwarping of the peninsula sinc Pliocene time.

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Ibaraki,M.: 4th International Congress on Pacific Neogene Stratigraphy,Berkeley,1987. Abst.Vol.48-49 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Ibaraki,M.: Repts.Fac.Science,Shizuoka Univ.22. 61-70 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Ibaraki, M.: "Planktonic foraminiferal event stratigraphy of the Neogene basin, the Pacific coast of central Japan" 4th International Congress on Pacific Neogene Stratigraphy, Berkeley, 1987. Abst. vol.48-49 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Ibaraki, M.: "Notes on neotectonic of southern Boso Peninsula, Central Japan, with reference to those of south Fossa Magna" Repts. Fac. Science, Shizuoka Univ.22. 61-70 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Masako Ibaraki: Reports of Faculty of Science Shizuoka University. 20. 39-173 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 茨木雅子: 海洋科学. 18. 154-161 (1986)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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