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Atmospheric oxygen and carbon dioxide in the late Archean and early Proterozoic

Research Project

Project/Area Number 15K05338
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Petrology/Mineralogy/Economic geology
Research InstitutionThe University of Tokyo

Principal Investigator

Murakami Takashi  東京大学, 大学院理学系研究科(理学部), 名誉教授 (00253295)

Co-Investigator(Kenkyū-buntansha) 鈴木 庸平  東京大学, 大学院理学系研究科(理学部), 准教授 (00359168)
宇都宮 聡  九州大学, 理学研究院, 准教授 (40452792)
Research Collaborator KANZAKI YOSHIKI  カリフォルニア大学, 博士研究員
Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords大気進化 / 酸素 / 二酸化炭素 / 風化 / 古土壌 / 先カンブリア時代
Outline of Final Research Achievements

The late Archean and early Proterozoic witnessed tremendous changes on the Earth’s surface environments: climate change, ocean evolution and life evolution to which atmospheric oxygen and carbon dioxide concentrations can give more accurate limitations. We made quantitative calculations based on newly constructed weathering models: an increase from 10E-6 to 10E-3 atm between 2.5 and 1.8 Ga in atmospheric oxygen, and a decrease from 10E-0.5 to 10E-1.5 atm between 2.8 and 1.8 Ga in atmospheric carbon dioxide. The carbon dioxide concentrations were high enough not to maintain the Earth above the freezing point. Our results has given a deeper understanding of the changes on the Earth’s surface environments between 2.8 and 1.8 Ga.

Report

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

    (6 results)

All 2017 2016 2015

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Acknowledgement Compliant: 3 results) Presentation (2 results)

  • [Journal Article] 先カンブリア時代の大気酸素濃度の変遷2017

    • Author(s)
      菅崎良貴、村上隆
    • Journal Title

      地球化学

      Volume: 57 Pages: 61-77

    • NAID

      130007040283

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Behaviors of trace elements in Neoarchean and Paleoproterozoic paleosols: Implications for atmospheric oxygen evolution and continental oxidative weathering2016

    • Author(s)
      Murakami, T., Matsuura, K., Kanzaki, Y.
    • Journal Title

      Geochimica et Cosmochimica Acta

      Volume: 192 Pages: 203-219

    • DOI

      10.1016/j.gca.2016.07.008

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Estimates of atmospheric O2 in the Paleoproterozoic from paleosols2016

    • Author(s)
      Kanzaki, Y., Murakami, T.
    • Journal Title

      Geochimica et Cosmochimica Acta

      Volume: 174 Pages: 263-290

    • DOI

      10.1016/j.gca.2015.11.022

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Estimates of atmospheric CO2 in the Neoarchean-Paleoproterozoic from paleosols2015

    • Author(s)
      Kanzaki, Y., Murakami, T.
    • Journal Title

      Geochimica et Cosmochimica Acta

      Volume: 159 Pages: 190-219

    • DOI

      10.1016/j.gca.2015.03.011

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 中性pHにおけるFe2+光酸化反応の実験的研究:初期火星の表層酸性化イベントに対する示唆2017

    • Author(s)
      田畑陽久・関根康人・菅崎良貴・杉田精司・村上隆
    • Organizer
      日本惑星科学会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 火星地表水pHの進化と安定性-Fe2+光酸化反応の理論的考察と室内実験2016

    • Author(s)
      田畑陽久・関根康人・菅崎良貴・杉田精司・村上隆
    • Organizer
      日本惑星科学会
    • Place of Presentation
      ノートルダム清心女子大学カリタスホール(岡山県岡山市)
    • Year and Date
      2016-09-12
    • Related Report
      2016 Research-status Report

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Published: 2015-04-16   Modified: 2019-03-29  

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