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Reconstruction of oceanic circulation patterns in the tropical Pacific across the early/middle Miocene boundary

Research Project

Project/Area Number 15K17780
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Stratigraphy/Paleontology
Research InstitutionIbaraki University

Principal Investigator

Kamikuri Shin-ichi  茨城大学, 教育学部, 准教授 (00612152)

Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords赤道太平洋 / 前期中新世 / サーモクライン / 東西勾配 / インドネシア海峡 / 放散虫化石 / 地球温暖化 / 中新世 / 海洋環境 / 海洋環境変遷史 / 東赤道太平洋 / 前期/中期中新世境界 / 放散虫化石群集 / 層序
Outline of Final Research Achievements

In this study, we reconstruct the changes in tropical oceanic circulation patterns in the Pacific across the early/middle Miocene boundary based on radiolarian assemblages obtained at Integrated Ocean Drilling Program Site U1335 in the eastern tropical Pacific.
Beginning in the latest early Miocene (~17 Ma) radiolarian assemblages were dominated by different taxa in the eastern and western tropical Pacific. This pattern is interpreted as indicating a shallower thermocline in the east and a deeper thermocline in the west, based on the relative abundance of the upwelling taxa. There is an overall increasing trend in this difference since the latest early Miocene. We tie these events to the effective closure of the Indo-Pacific seaway and the development of a substantial western Pacific warm pool along with the development of a strong Equatorial Undercurrent.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (24 results)

All 2018 2017 2016 2015 Other

All Int'l Joint Research (3 results) Journal Article (10 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 10 results,  Acknowledgement Compliant: 2 results) Presentation (11 results) (of which Int'l Joint Research: 3 results)

  • [Int'l Joint Research] Michigan University(米国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] Michigan University(米国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] University of Michigan(米国)

    • Related Report
      2015 Research-status Report
  • [Journal Article] Middle to late Miocene radiolarians at ODP Site 1021 in the eastern North Pacific2018

    • Author(s)
      Shin-ichi Kamikuri
    • Journal Title

      Bulletin of the Geological Survey of Japan

      Volume: 印刷中

    • NAID

      130007631548

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Radioalrian assemblages from the early to middle Miocene at IODP Site U1335 in the eastern tropical Pacific2018

    • Author(s)
      Shin-ichi Kamikuri
    • Journal Title

      Bulletin of the Geological Survey of Japan

      Volume: 印刷中

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reconstruction of oceanic circulateon patterns in the tropical Pacific across the early/middle Miocene boundary as inferred from radiolarian assemblages2017

    • Author(s)
      Shin-ichi Kamikuri and Ted Moore,
    • Journal Title

      Palaeogeography, Palaeoclimatology, Palaeoecology

      Volume: 487 Pages: 136-148

    • DOI

      10.1016/j.palaeo.2017.08.028

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Late Neogene radiolarian biostratigraphy of the eastern North Pacific ODP Sites 1020/10212017

    • Author(s)
      Shin-ichi Kamikuri
    • Journal Title

      Paleontological Research

      Volume: 21 Issue: 3 Pages: 230-254

    • DOI

      10.2517/2016pr027

    • NAID

      40021244788

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Radiolarian biostratigraphy from middle Miocene to late Pleistocene in the Japan Sea.2017

    • Author(s)
      Kamikuri, S., Itaki, T., Motoyama, I. & Matsuzaki, K. M.
    • Journal Title

      Paleontological Research

      Volume: - Issue: 4 Pages: 397-421

    • DOI

      10.2517/2017pr001

    • NAID

      40021331765

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cenozoic biostratigraphy, chronostratigraphy and paleoceanography in the Boso Peninsula and Bandai Volcano in the Aizu region, East Japan2017

    • Author(s)
      Isao MOTOYAMA, Takuya ITAKI, Shin’ichi KAMIKURI, Yojiro TAKETANI and Makoto OKADA.
    • Journal Title

      Science reports of Niigata University

      Volume: 32 Pages: 1-27

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Radiolarian biostratigraphy from Middle Miocene to Late Pleistocene in the Japan Sea2017

    • Author(s)
      SHIN-ICHI KAMIKURI, TAKUYA ITAKI, ISAO MOTOYAMA AND KENJI MATSUZAKI
    • Journal Title

      Paleontological Research

      Volume: -

    • NAID

      40021331765

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Late Neogene radiolarian biostratigraphy of the eastern North Pacific ODP Sites 1020/10212016

    • Author(s)
      SHIN-ICHI KAMIKURI
    • Journal Title

      Paleontological Research

      Volume: -

    • NAID

      40021244788

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Radiolarian stratigraphy near the Eocene-Oligocene boundary2015

    • Author(s)
      Moore, T.C.Jr., Kamikuri, S., Erhardt, A.M., Baldauf, J., Coxall, H.K., Westerhold, T.
    • Journal Title

      Marine Micropaleontology

      Volume: 116 Pages: 50-62

    • DOI

      10.1016/j.marmicro.2015.02.002

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Radiolarian assemblages during the middle-late Eocene transition at Site 1052, ODP Leg 171B, Blake Nose, western North Atlantic Ocean2015

    • Author(s)
      Shin-ichi Kamikuri
    • Journal Title

      News of Osaka Micropaleontologists

      Volume: 15 Pages: 139-167

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Presentation] 前期~中期中新世における東赤道太平洋の海洋環境変遷2018

    • Author(s)
      上栗伸一,Ted Moore
    • Organizer
      MRC2018
    • Related Report
      2017 Annual Research Report
  • [Presentation] 放散虫化石の群集解析に基づいた前期/中期中新世境界における東赤道太平洋の海洋環境変遷2017

    • Author(s)
      上栗伸一,Ted Moore
    • Organizer
      MRC(微化石研究集会)
    • Place of Presentation
      山形大学
    • Year and Date
      2017-03-02
    • Related Report
      2016 Research-status Report
  • [Presentation] 東赤道太平洋における前期/中期中新世境界付近の海洋環境変遷2017

    • Author(s)
      上栗伸一,Ted Moore
    • Organizer
      日本古生物学会例会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2017-01-27
    • Related Report
      2016 Research-status Report
  • [Presentation] 放散虫化石の群集解析に基づいた前期/中期中新世境界における東赤道太平洋の海洋環境変遷2017

    • Author(s)
      上栗伸一,Ted Moore
    • Organizer
      Micro paleontological Reference Center
    • Related Report
      2017 Annual Research Report
  • [Presentation] Reconstruction of oceanic circulation patterns in the tropical Pacific across the early/middle Miocene boundary as inferred from radiolarian assemblages2017

    • Author(s)
      Shin-ichi KAMIKURI and Theodore C. MOORE
    • Organizer
      InterRad XV
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Towards an integrated cross-latitude event stratigraphy for Paleogene radiolarians2017

    • Author(s)
      Christopher J. HOLLIS, Kristina M. PASCHER, Shin-ichi KAMIKURI, Akiko NISHIMURA, Noritoshi SUZUKI and Annika SANFILIPPO
    • Organizer
      InterRad XV
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Practical Examples of an Integrated Field Study Program at Mt. Fuji: Geosciences and the Arts2017

    • Author(s)
      Takashi Ito, Shin-ichi Kamikuri, Hisashi Otsuji, Naoki Kataguchi, Hiroto Maruyama and Hiroshi Hashiura
    • Organizer
      AGU
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 前期/中期中新世境界における東赤道太平洋の海洋環境変遷2016

    • Author(s)
      上栗伸一,Ted Moore
    • Organizer
      日本古生物学会年会
    • Place of Presentation
      福井県立大学
    • Year and Date
      2016-06-24
    • Related Report
      2016 Research-status Report
  • [Presentation] 前期/中期中新世境界付近における東赤道太平洋の海洋環境変遷2016

    • Author(s)
      上栗伸一, Ted Moore
    • Organizer
      日本古生物学会
    • Place of Presentation
      福井県
    • Year and Date
      2016-06-24
    • Related Report
      2015 Research-status Report
  • [Presentation] Radiolarian faunal turnover across the early/middle Miocene boundary in the eastern equatorial Pacific Ocean2016

    • Author(s)
      Shinichi Kamikuri, Ted Moore
    • Organizer
      地球惑星連合大会
    • Place of Presentation
      千葉県
    • Year and Date
      2016-05-22
    • Related Report
      2015 Research-status Report
  • [Presentation] 中~後期中新世のカリフォルニア海流の変遷史2015

    • Author(s)
      上栗伸一
    • Organizer
      日本古生物学会
    • Place of Presentation
      茨城県
    • Year and Date
      2015-06-24
    • Related Report
      2015 Research-status Report

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Published: 2015-04-16   Modified: 2022-06-07  

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