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On the study of explosive biodiversification event on pelagic deep-sea bottoms in the Early Phanerozoic Eon

Research Project

Project/Area Number 24540496
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Stratigraphy/Paleontology
Research InstitutionMeiji University (2014-2015)
The University of Tokyo (2012-2013)

Principal Investigator

Kakuwa Yoshitaka  明治大学, 研究・知財戦略機構, 教授 (70124667)

Project Period (FY) 2012-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywords生痕化石 / 放散虫チャート / オルドビス紀 / チャート / 遠洋域 / 底生生物の進化 / 深海底の環境変動 / 地球史 / 遠洋深海 / 海洋環境の変動 / カザフスタン / 底生生物 / 海洋環境変動 / 進化
Outline of Final Research Achievements

Explosive increase in biodiversification is confirmed in the shallow epicontinental settings in the Middle Ordovician age. Trace fossils in well-dated radiolarian cherts are examined to clarify if the event also had occurred on pelagic deep ocean bottoms. Tiny trace fossils are confirmed in the upper Cambrian cherts of the Lachlan Fold Belt, the deposits of Panthalassan Ocean in Australia, while no trace fossils are found in the cherts of Kazakhstan, the deposits of Tethyan Ocean. In the Middle Ordovician cherts, trace fossils have been commonly found in all five examined areas including the deposits of Iapetan Ocean.
The cause of the difference in the regions found in the upper Cambrian rocks is ascribed to the depositional environment. Red chert in Kazakhstan had been deposited under well-oxygenated environment, but poverty of foods prevented migration of benthic animals into the pelagic realm. The Great Ordovician Biodiversification Event is also confirmed in pelagic ocean bottom.

Report

(5 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (6 results)

All 2016 2015

All Presentation (6 results)

  • [Presentation] Lithology of Cambrian to Ordovician radiolarian chert in Kazakhstan with special reference to trace fossils2016

    • Author(s)
      Kakuwa, Y., Olga, N.I., Tolmacheva, T.J.
    • Organizer
      日本地球惑星科学連合
    • Place of Presentation
      千葉県幕張メッセ
    • Year and Date
      2016-05-23
    • Related Report
      2015 Annual Research Report
  • [Presentation] 赤色チャートの生痕化石の問題2016

    • Author(s)
      角和善隆
    • Organizer
      日本堆積学会
    • Place of Presentation
      福岡大学
    • Year and Date
      2016-03-15
    • Related Report
      2015 Annual Research Report
  • [Presentation] Trace fossils of Ordovician chert and siliceous rocks from Newfoundland, northeastern Canada2015

    • Author(s)
      角和善隆
    • Organizer
      日本地球惑星科学連合
    • Place of Presentation
      千葉県幕張メッセ
    • Year and Date
      2015-05-26
    • Related Report
      2015 Annual Research Report
  • [Presentation] カナダ北東部、ニューファウンドランド島に分布するオルドビス系チャート・珪質岩に発達する生痕化石2015

    • Author(s)
      角和善隆
    • Organizer
      日本地球惑星科学連合
    • Place of Presentation
      千葉幕張メッセ
    • Year and Date
      2015-05-26
    • Related Report
      2014 Research-status Report
  • [Presentation] 遠洋性チャートに記録された底生生物の進化 - スコットランドのオルドビス系珪質岩2015

    • Author(s)
      角和善隆
    • Organizer
      日本堆積学会
    • Place of Presentation
      筑波大学
    • Year and Date
      2015-04-26
    • Related Report
      2015 Annual Research Report
  • [Presentation] 遠洋性チャートに記録された底生生物の進化 _ スコットランドのオルドビス系珪質岩2015

    • Author(s)
      角和善隆
    • Organizer
      日本堆積学会
    • Place of Presentation
      筑波大学
    • Year and Date
      2015-04-26
    • Related Report
      2014 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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