A theoretical study on the stability and dynamics of the mid-Proterozoic oceanic redox chemistry

• Project/Area Number: 25870185
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geology; Meteorology/Physical oceanography/Hydrology
• Research Institution: The University of Tokyo
• Principal Investigator: Ozaki Kazumi 東京大学, 大気海洋研究所, 研究員 (10644411)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 生物地球化学 / 海洋物質循環モデル / 原生代 / 大気海洋化学組成 / 物質循環モデル / 生態系モデル

Outline of Final Research Achievements

We have investigated the biogeochemical conditions for the mid-Proterozoic oceanic redox chemistry by developing a new ocean biogeochemical cycle model. By conducting a series of sensitivity experiments with respect to atmospheric oxygen, terrestrial weathering rate, and pyrite burial efficiency, we have discussed the stability and dynamics of oceanic redox state during the mid-Proteroozic.

Research Products

• [Int'l Joint Research] ジョージア工科大学/イェール大学/カリフォルニア大学(米国)
• [Int'l Joint Research] ブリティッシュコロンビア大学(カナダ)
• [Presentation] Stability and Dynamics of Proterozoic Oceanic Euxinia (2016)
  • Author(s): 尾崎和海、田近英一
  • Organizer: ゴールドシュミット
  • Place of Presentation: パシフィコ横浜（横浜市西区）
  • Year and Date: 2016-06-29
  • Int'l Joint Research / Invited
• [Presentation] 中期原生代海洋の遊離酸素生成率とその律速因子 (2015)
  • Author(s): 尾崎和海、田近英一
  • Organizer: 地球環境史学会
  • Place of Presentation: 東京大学（東京都文京区）
  • Year and Date: 2015-11-21
• [Presentation] Towards a quantitative understanding of the mid-Proterozoic redox state of the atmosphere and oceans (2015)
  • Author(s): 尾崎和海、田近英一
  • Organizer: ゴールドシュミット
  • Place of Presentation: Prague, the Czech Republic
  • Year and Date: 2015-08-18
  • Int'l Joint Research
• [Presentation] 原生代海洋ユーキシニアのダイナミクスと生物圏への影響 (2015)
  • Author(s): 尾崎和海、田近英一
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ（千葉県千葉市）
  • Year and Date: 2015-05-26
• [Presentation] 原生代海洋ユーキシニアのダイナミクスと生物圏への影響 (2015)
  • Author(s): 尾崎和海、田近英一
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: 幕張メッセ、千葉
  • Year and Date: 2015-05-26
• [Presentation] Widespread euxinia in the aftermath of the Lomagundi event: insights from a modeling study of ocean biogeochemical dynamics (2015)
  • Author(s): 尾崎和海、田近英一
  • Organizer: European Geosciences Union
  • Place of Presentation: Wien, Austria
  • Year and Date: 2015-04-15
  • Int'l Joint Research
• [Presentation] Lomagundiイベント直後の大規模海洋ユーキシニア (2014)
  • Author(s): 尾崎和海、田近英一
  • Organizer: 日本地質学会
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2014-09-15
• [Presentation] Dynamics of Proterozoic ocean euxinia (2014)
  • Author(s): Kazumi Ozaki and Eiichi Tajika
  • Organizer: Goldschmidt
  • Place of Presentation: カリフォルニア、USA
  • Year and Date: 2014-06-12
• [Presentation] Conditions for Proterozoic anoxic and non-sulfidic ocean: Constraints from ocean biogeochemical cycle model
  • Author(s): Kazumi Ozaki and Eiichi Tajika
  • Organizer: Goldschmidt
  • Place of Presentation: フィレンツェ、イタリア
• [Presentation] 原生代海洋化学環境の復元：海洋生物化学循環モデルからの制約
  • Author(s): 尾崎和海、田近英一
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張メッセ、千葉