Analysis on paleocean redox condition based on the concentration, speciation, and stable isotope ratio of cerium

• Project/Area Number: 15K17793
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geochemistry/Cosmochemistry
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: NAKADA Ryoichi 国立研究開発法人海洋研究開発機構, 高知コア研究所, 技術研究員 (50726958)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: セリウム / 希土類元素 / 安定同位体比 / 酸化還元

Outline of Final Research Achievements

Efficiently removal of Ba from REE was achieved. In the analysis of Ce stable isotope ratio, AridusII desolvating nebulizer system enables 10 times higher 140Ce signal intensity. Analyses on Ce stable isotopic fractionation at varying pH condition and natural modern analog indicated that this novel proxy can be successfully utilized to reconstruct Earth’s redox state, particularly from slightly oxic to highly oxic conditions.

Research Products

• [Journal Article] Europium anomaly variation under low-temperature water-rock interaction: A new thermometer (2017)
  • Author(s): R. Nakada, T. Shibuya, K. Suzuki, and Y. Takahashi
  • Journal Title: Geochemistry International Volume: 印刷中
  • Peer Reviewed
• [Journal Article] Cerium stable isotope ratios in ferromanganese deposits and their potential as a paleo-redox proxy (2016)
  • Author(s): R. Nakada, Y. Takahashi, and M. Tanimizu
  • Journal Title: Geochimica Cosmochimica Acta Volume: 181 Pages: 89-100
  • DOI: 10.1016/j.gca.2016.02.025
  • Peer Reviewed / Open Access
• [Journal Article] Impact of the decarboxylation reaction on rare earth elements binding to organic matter: From humic substances to crude oil (2016)
  • Author(s): R. Nakada, A. Waseda, F. Okumura, and Y. Takahashi
  • Journal Title: Chemical Geology Volume: 420 Pages: 231-239
  • DOI: 10.1016/j.chemgeo.2015.11.021
  • Peer Reviewed / Open Access
• [Journal Article] Transfer of rare earth elements (REE) from manganese oxides to phosphates during early diagenesis in pelagic sediments inferred from REE patterns, X-ray absorption spectroscopy, and chemical leaching method (2015)
  • Author(s): Y. Takahashi, Y. Hayasaka, K. Morita, T. Kashiwabara, R. Nakada, M. A. Marcus, K. Kato, K. Tanaka, and H. Shimizu
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 49 Issue: 6 Pages: 653-674
  • DOI: 10.2343/geochemj.2.0393
  • NAID: 130005112460
  • ISSN: 0016-7002, 1880-5973
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Volcanism and deep-ocean acidification across the end-Triassic extinction event (2015)
  • Author(s): M. Ikeda, R. S. Hori, Y. Okada, and R. Nakada
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 440 Pages: 725-733
  • DOI: 10.1016/j.palaeo.2015.09.046
  • Peer Reviewed / Open Access
• [Presentation] Detection of martian sulfate from impact glasses in shergottites by X-ray absorption near-edge structure analysis (2017)
  • Author(s): M. Shidare, R. Nakada, T. Usui, K. Shimizu, T. Yokoyama, and Y. Takahashi
  • Organizer: 48th Lunar and Planetary Science Conference
  • Place of Presentation: Texas, U.S.A.
  • Year and Date: 2017-03-21
  • Int'l Joint Research
• [Presentation] Timing of volcanism and deep-ocean acidification across the end-Triassic extinction event (2016)
  • Author(s): M. Ikeda, R. Hori, Y. Okada, R. Nakada, and Y. Saito
  • Organizer: The Geological Society of America Annual Meeting 2016
  • Place of Presentation: Denver, U.S.A.
  • Year and Date: 2016-09-25
  • Int'l Joint Research
• [Presentation] 局所XANES分析に基づくYamato 980459火星隕石の酸素分圧進化 (2016)
  • Author(s): 中田亮一, 臼井寛裕, 潮田雅司, 高橋嘉夫
  • Organizer: 日本鉱物科学会2016年年会
  • Place of Presentation: 金沢大学（石川県金沢市）
  • Year and Date: 2016-09-23
• [Presentation] 原生代初期Hotazel鉄鉱層の全岩化学組成から示唆される大酸化イベントによる生命進化への影響 (2016)
  • Author(s): 青木翔吾, 中田亮一, 柏原輝彦, 大野剛, 高橋嘉夫, Harilaos Tsikos, 小宮剛
  • Organizer: 2016年度地球化学会年会
  • Place of Presentation: 大阪市立大学（大阪府大阪市）
  • Year and Date: 2016-09-16
• [Presentation] X線吸収端近傍構造分析による火星隕石の硫黄化学種解析 (2016)
  • Author(s): 四垂将志, 中田亮一, 臼井寛裕, 清水健二, 高橋嘉夫, 横山哲也
  • Organizer: 2016年度地球化学会年会
  • Place of Presentation: 大阪市立大学（大阪府大阪市）
  • Year and Date: 2016-09-16
• [Presentation] ペルム紀末の遠洋域深海堆積岩に記録された還元鉄とモリブデン化学種の変化 (2016)
  • Author(s): 高橋聡, 中田亮一, 渡辺勇輔, 高橋嘉夫
  • Organizer: 日本地質学会第123年学術大会
  • Place of Presentation: 日本大学（東京都世田谷区）
  • Year and Date: 2016-09-12
• [Presentation] Micro-XANES determination on the oxidation states of V and Fe in olivine-hosted glass inclusion and groundmass glass of Yamato 980459 (2016)
  • Author(s): R. Nakada, T. Usui, M. Ushioda, and Y. Takahashi
  • Organizer: 79th Annual Meeting of the Meteoritical Society
  • Place of Presentation: Berlin, Germany
  • Year and Date: 2016-08-11
  • Int'l Joint Research
• [Presentation] Impact of the decarboxylation reaction on rare earth elements binding to organic matter: From humic substances to crude oil (2016)
  • Author(s): R. Nakada, A. Waseda, F. Okumura, and Y. Takahashi
  • Organizer: The 26th Goldschmidt Conference
  • Place of Presentation: パシフィコ横浜（神奈川県横浜市）
  • Year and Date: 2016-06-29
  • Int'l Joint Research
• [Presentation] Rock-magnetic studies concerning source of the Martian magnetic anomaly (2016)
  • Author(s): 佐藤雅彦, 潮田雅司, 中田亮一, 山本裕二, 西岡孝, 小玉一人, 綱川秀夫, 望月伸竜
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ（千葉県千葉市）
  • Year and Date: 2016-05-24
  • Invited
• [Presentation] 吸着および沈殿時のセリウム安定同位体分別における溶存錯体種の影響 (2016)
  • Author(s): 中田亮一, 田中雅人, 谷水雅治, 高橋嘉夫
  • Organizer: 第14回 微生物－鉱物－水－大気相互作用研究会
  • Place of Presentation: 東京大学（東京都文京区）
  • Year and Date: 2016-03-03
• [Presentation] Precise determination of Fe species in plagioclase crystals: a case study for gabbroic anorthosite of the Duluth complex (2015)
  • Author(s): 佐藤雅彦, 潮田雅司, 中田亮一
  • Organizer: 地球電磁気・地球惑星圏学会第138回総会・講演会
  • Place of Presentation: 東京大学（東京都文京区）
  • Year and Date: 2015-11-02
• [Presentation] 火星衛星の起源について ～現状整理と展望、サイエンスの展開～ (2015)
  • Author(s): 玄田英典, 樋口有理可, Ramon Brasser, 小南淳子, 兵頭龍樹, 末次竜, 関根康人, 木村淳, 臼井寛裕, 黒川宏之, 中田亮一, 井田茂, 大槻圭史, 中本泰史, 火星衛星サンプルリターン計画科学検討チーム
  • Organizer: 日本惑星科学会2015年度秋季講演会
  • Place of Presentation: 東京工業大学（東京都目黒区）
  • Year and Date: 2015-10-14
• [Presentation] 吸着および沈殿時のセリウム安定同位体分別における溶存錯体種の影響 (2015)
  • Author(s): 中田亮一, 田中雅人, 谷水雅治, 高橋嘉夫
  • Organizer: 2015年度地球化学会年会
  • Place of Presentation: 横浜国立大学（神奈川県横浜市）
  • Year and Date: 2015-09-17
• [Presentation] ペルム紀末大量絶滅期の還元環境における微量元素の挙動 (2015)
  • Author(s): 高橋聡, 山崎慎一, 小川泰正, 木村和彦, 吉田武義, 土屋範芳, 中田亮一, 海保邦夫, 高橋嘉夫
  • Organizer: 2015年度地球化学会年会
  • Place of Presentation: 横浜国立大学（神奈川県横浜市）
  • Year and Date: 2015-09-17
• [Presentation] Dissolved species controlling isotope effect for cerium during adsorption and precipitation (2015)
  • Author(s): R. Nakada, M. Tanaka, M. Tanimizu, and Y. Takahashi
  • Organizer: The 25th Goldschmidt Conference
  • Place of Presentation: Prague, Czech
  • Year and Date: 2015-08-17
  • Int'l Joint Research
• [Presentation] 三畳紀ージュラ紀境界絶滅における深海酸性化と火山活動 (2015)
  • Author(s): 池田昌之, 堀利栄, 中田亮一, 岡田有希
  • 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] Precise determination of Fe species in plagioclase crystals: a preliminary study (2015)
  • Author(s): 佐藤雅彦, 潮田雅司, 中田亮一
  • 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: 2015-05-24
• [Remarks] 研究内容および成果に関するwebページ
  • URL: http://www.jamstec.go.jp/res/ress/nakadar/findings/finding2.html