高時間分解能での化学種及び同位体分析に基づくペルム紀末大量絶滅時の環境変動解明

• Project/Area Number: 22H00182
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 17:Earth and planetary science and related fields
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: 中田 亮一 国立研究開発法人海洋研究開発機構, 超先鋭研究開発部門(高知コア研究所), 主任研究員 (50726958)
• Co-Investigator(Kenkyū-buntansha): 新田 清文 公益財団法人高輝度光科学研究センター, 分光推進室, 研究員 (00596009) ; 高橋 聡 名古屋大学, 環境学研究科, 准教授 (60615251)
• Project Period (FY): 2022-04-01 – 2026-03-31
• Project Status: Granted (Fiscal Year 2024)
• Budget Amount: ¥41,470,000 (Direct Cost: ¥31,900,000、Indirect Cost: ¥9,570,000); Fiscal Year 2025: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2024: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2023: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2022: ¥27,950,000 (Direct Cost: ¥21,500,000、Indirect Cost: ¥6,450,000)
• Keywords: ペルム紀末 / 化学種分析 / 同位体比分析

Outline of Research at the Start

本研究では、①XAFS分析に先立つ蛍光X線（XRF）マッピングの高速化と、②同位体比分析必要試料量の2桁減少という本研究で鍵となる2つの基盤技術を確立し、③ペルム紀末から三畳紀にかけての遠洋域堆積岩および遠洋海山炭酸塩岩の同位体比分析と放射光XAFS分析を高時間分解能で行い、ペルム紀末大量絶滅イベント時の環境変動とその回復過程を解明する。

Outline of Annual Research Achievements

本研究では、①XAFS分析に先立つ蛍光X線（XRF）マッピングの高速化と、②同位体比分析必要試料量の2桁減少という本研究で鍵となる2つの基盤技術を確立し、③ペルム紀末から三畳紀にかけての遠洋域堆積岩および遠洋海山炭酸塩岩の同位体比分析と放射光XAFS分析を高時間分解能で行い、ペルム紀末大量絶滅イベント時の環境変動とその回復過程の解明を4年間で行う計画をしている。
2023年度は、遅れていたon the flyステージが納品された後、既に開発していた測定プログラムを通して速やかにテストを行い、①XAFS分析に先立つ蛍光X線（XRF）マッピングの高速化を達成した。試料の走査範囲にもよるが、約1000マイクロメートル四方であれば、1/10程度の時間でXRFマップの取得を実現した。
また、③ペルム紀末から三畳紀にかけての遠洋域堆積岩のSr同位体比分析を行うとともに、硫黄およびリン化学種分析を実施した。ただし、硫黄については硫酸塩種が多く検出されており、初生的なものであるのか、試料採取後に酸化したのか要検討である。また、リン化学種分析では、予想以上にケイ素の蛍光X線によるバックグラウンド増加が顕著であり、スペクトルの取得は達成したものの、質の良いスペクトルが取得できていない。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

X線化学種分析に関しては測定データの質に改良の余地が残るものの、概ね当初計画通りの進捗状況であるため。

Strategy for Future Research Activity

リン化学種分析ではケイ素による妨害のため、当初予定よりも大幅に測定時間を要する状況となっているため、当初計画よりは化学種分析に用いる時間を増やす必要がある。それ以外は概ね計画に従って実施する。

Research Products

• [Journal Article] Comparative study on cavernous weathering features formed by coastal processes and acidic alteration: Implications for rounded pits on Martian rocks (2024)
  • Author(s): Sugiuchi Mitsuteru、Sekine Yasuhito、Takahashi Satoshi
  • Journal Title: Icarus Volume: 410 Pages: 115889-115889
  • DOI: 10.1016/j.icarus.2023.115889
  • Peer Reviewed / Open Access
• [Journal Article] Oxygen increase and the pacing of early animal evolution (2024)
  • Author(s): Kaiho Kunio、Shizuya Atena、Kikuchi Minori、Komiya Tsuyoshi、Chen Zhong-Qiang、Tong Jinnan、Tian Li、Gorjan Paul、Takahashi Satoshi、Baud Aymon、Grasby Stephen E.、Saito Ryosuke、Saltzman Matthew R.
  • Journal Title: Global and Planetary Change Volume: 233 Pages: 104364-104364
  • DOI: 10.1016/j.gloplacha.2024.104364
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Development of organic-metal element interactions and organic cosmochemistry analysis using XAFS (2023)
  • Author(s): 中田 亮一
  • Journal Title: Researches in Organic Geochemistry Volume: 39 Issue: 2 Pages: 47-59
  • DOI: 10.20612/rog.39.2_47
  • ISSN: 1344-9915, 2189-7891
  • Year and Date: 2023-12-28
  • Peer Reviewed
• [Journal Article] Hadean mantle oxidation inferred from melting of peridotite under lower-mantle conditions (2023)
  • Author(s): Kuwahara Hideharu、Nakada Ryoichi、Kadoya Shintaro、Yoshino Takashi、Irifune Tetsuo
  • Journal Title: Nature Geoscience Volume: - Issue: 5 Pages: 461-465
  • DOI: 10.1038/s41561-023-01169-4
  • Peer Reviewed
• [Journal Article] Partitioning of Fe2+ and Fe3+ between bridgmanite and silicate melt: Implications for redox evolution of the Earth's mantle (2023)
  • Author(s): Kuwahara Hideharu、Nakada Ryoichi
  • Journal Title: Earth and Planetary Science Letters Volume: 615 Pages: 118197-118197
  • DOI: 10.1016/j.epsl.2023.118197
  • Peer Reviewed
• [Journal Article] Identification of carbonate-associated sulfate (CAS) in a Noachian Martian meteorite Allan Hills 84001 (2023)
  • Author(s): Kajitani Iori、Koike Mizuho、Nakada Ryoichi、Tanabe Gaku、Usui Tomohiro、Matsu'ura Fumihiro、Fukushi Keisuke、Yokoyama Tetsuya
  • Journal Title: Earth and Planetary Science Letters Volume: 620 Pages: 118345-118345
  • DOI: 10.1016/j.epsl.2023.118345
  • Peer Reviewed
• [Journal Article] Cerium geochemical composition of the upper continental crust through time: Implications for tracing past surface redox conditions (2023)
  • Author(s): Li Wenshuai、Nakada Ryoichi、Takahashi Yoshio、Gaschnig Richard M.、Hu Yongfeng、Shakouri Mohsen、Rudnick Roberta L.、Liu Xiao-Ming
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 359 Pages: 20-29
  • DOI: 10.1016/j.gca.2023.08.024
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Effect of line tension on domain formation of fluorinated compounds at alkane/water interface (2023)
  • Author(s): Takiue Takanori、Takayose Shunichi、Hotta Tetsuya、Kamikido Nobuyoshi、Saiki Kosuke、Shirai Chikara、Mitsuda Runa、Ina Toshiaki、Nitta Kiyofumi、Tanida Hajime、Uruga Tomoya、Ikeda Norihiro
  • Journal Title: Colloids and Surfaces A: Physicochemical and Engineering Aspects Volume: 676 Pages: 132318-132318
  • DOI: 10.1016/j.colsurfa.2023.132318
  • Peer Reviewed
• [Journal Article] 5D Analysis of Capacity Degradation in Battery Electrodes Enabled by <i>Operando</i> CT‐XANES (2023)
  • Author(s): Kimura Yuta、Huang Su、Nakamura Takashi、Ishiguro Nozomu、Sekizawa Oki、Nitta Kiyofumi、Uruga Tomoya、Takeuchi Tomonari、Okumura Toyoki、Tada Mizuki、Uchimoto Yoshiharu、Amezawa Koji
  • Journal Title: Small Methods Volume: 7 Issue: 10 Pages: 2300310-2300310
  • DOI: 10.1002/smtd.202300310
  • Peer Reviewed
• [Journal Article] Counteranion-induced structural isomerization of phosphine-protected PdAu8 and PtAu8 clusters (2023)
  • Author(s): Fujiki Yu、Matsuyama Tomoki、Kikkawa Soichi、Hirayama Jun、Takaya Hikaru、Nakatani Naoki、Yasuda Nobuhiro、Nitta Kiyofumi、Negishi Yuichi、Yamazoe Seiji
  • Journal Title: Communications Chemistry Volume: 6 Issue: 1 Pages: 129-129
  • DOI: 10.1038/s42004-023-00929-y
  • Peer Reviewed / Open Access
• [Journal Article] Oxidation and phase transfer of individual Cr-doped dendritic FeOx particles visualized by full-field nano-XAFS spectroimaging (2023)
  • Author(s): Ishiguro Nozomu、Matsui Hirosuke、Wakamatsu Kohei、Suzuki Yoya、Sekizawa Oki、Nitta Kiyofumi、Terada Yasuko、Uruga Tomoya、Tada Mizuki
  • Journal Title: Physical Chemistry Chemical Physics Volume: 25 Issue: 26 Pages: 17197-17206
  • DOI: 10.1039/d3cp00907f
  • Peer Reviewed
• [Journal Article] Present status of micro-spectroscopy at BL37XU (2023)
  • Author(s): Nitta Kiyofumi、Suga Hiroki、Sekizawa Oki
  • Journal Title: Radiation Physics and Chemistry Volume: 211 Pages: 111028-111028
  • DOI: 10.1016/j.radphyschem.2023.111028
  • Peer Reviewed
• [Journal Article] Emergence of Dynamically‐Disordered Phases During Fast Oxygen Deintercalation Reaction of Layered Perovskite (2023)
  • Author(s): Yamamoto Takafumi、Kawaguchi Shogo、Kosuge Taiki、Sugai Akira、Tsunoda Naoki、Kumagai Yu、Beppu Kosuke、Ohmi Takuya、Nagase Teppei、Higashi Kotaro、Kato Kazuo、Nitta Kiyofumi、Uruga Tomoya、Yamazoe Seiji、Oba Fumiyasu、Tanaka Tsunehiro、Azuma Masaki、Hosokawa Saburo
  • Journal Title: Advanced Science Volume: - Issue: 19 Pages: 2301876-2301876
  • DOI: 10.1002/advs.202301876
  • Peer Reviewed / Open Access
• [Journal Article] Microscopic synchrotron X-ray analysis of mercury waste in simulated landfill experiments (2023)
  • Author(s): Takaoka Masaki、Kusakabe Taketoshi、Shiota Kenji、Hirata Osamu、Kawase Keizou、Yanase Ryuji、Nitta Kiyofumi
  • Journal Title: Journal of Material Cycles and Waste Management Volume: 25 Issue: 5 Pages: 2599-2611
  • DOI: 10.1007/s10163-023-01632-9
  • Peer Reviewed
• [Journal Article] Revisiting Cationic Doping Impacts in Ni-Rich Cathodes (2023)
  • Author(s): Hou Xueyan、Katsumata Takuya、Kimura Yuta、Tamenori Yusuke、Nitta Kiyofumi、Yamagishi Hirona、Amezawa Koji、Nakamura Takashi
  • Journal Title: ACS Applied Energy Materials Volume: 6 Issue: 3 Pages: 2072-2080
  • DOI: 10.1021/acsaem.2c04141
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Centennial scale sequences of environmental deterioration preceded the end-Permian mass extinction (2023)
  • Author(s): Saito Ryosuke、W?rmer Lars、Taubner Heidi、Kaiho Kunio、Takahashi Satoshi、Tian Li、Ikeda Masayuki、Summons Roger E.、Hinrichs Kai-Uwe
  • Journal Title: Nature Communications Volume: 14 Issue: 1 Pages: 2113-2113
  • DOI: 10.1038/s41467-023-37717-0
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Conodont biostratigraphy of a Carboniferous?Permian boundary section in siliceous successions of pelagic Panthalassa revealed by X-ray computed microtomography (2023)
  • Author(s): Muto Shun、Takahashi Satoshi、Murayama Masafumi
  • Journal Title: Frontiers in Earth Science Volume: 11 Pages: 1-19
  • DOI: 10.3389/feart.2023.1162023
  • Peer Reviewed / Open Access
• [Journal Article] REE geochemistry of conodont fossils from pelagic deep-sea sedimentary rocks (2023)
  • Author(s): Matsumoto Hironao、Takahashi Satoshi、Muto Shun、Iizuka Tsuyoshi
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 57 Issue: 6 Pages: 184-196
  • DOI: 10.2343/geochemj.GJ23017
  • ISSN: 0016-7002, 1880-5973
  • Peer Reviewed / Open Access
• [Journal Article] The cerium isotope fingerprints of redox fluctuation in bauxites (2023)
  • Author(s): W. Li, X. M. Liu, R. Nakada, Y. Takahashi, Y. Hu, M. Shakouri, Z. Zhang, T. Okumura, S. Yamada
  • Journal Title: Earth and Planetary Science Letters Volume: 602 Pages: 117962-117962
  • DOI: 10.1016/j.epsl.2022.117962
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Temperature Dependence of Yb Valence in an Au–Al–Yb Intermediate-Valence Quasicrystal Investigated by Yb <i>L</i>₃-Edge X-ray Absorption Near-Edge Structure Spectroscopy (2022)
  • Author(s): Watanuki Tetsu、Mizumaki Masaichiro、Watanabe Shinji、Kawamura Naomi、Nitta Kiyofumi、Machida Akihiko、Ishimasa Tsutomu
  • Journal Title: MATERIALS TRANSACTIONS Volume: 63 Issue: 10 Pages: 1380-1383
  • DOI: 10.2320/matertrans.MT-M2022064
  • ISSN: 1345-9678, 1347-5320
  • Year and Date: 2022-10-01
  • Peer Reviewed
• [Journal Article] Operando X-Ray Fluorescence Measurement Method of Cerium Radical Quencher Distribution in through-Plane MEA (2022)
  • Author(s): Takezawa Aika、Orikasa Yuki、Tsuji Yoichiro、Asaoka Takahiko、Ohki Maria、Sekizawa Oki、Nitta Kiyofumi
  • Journal Title: ECS Meeting Abstracts Volume: MA2022-02 Issue: 64 Pages: 2375-2375
  • DOI: 10.1149/ma2022-02642375mtgabs
  • Peer Reviewed
• [Journal Article] Thermodynamic Analysis Enables Quantitative Evaluation of Lattice Oxygen Stability in Li-Ion Battery Cathodes (2022)
  • Author(s): Xue-Yan Hou, Yuta Kimura, Yusuke Tamenori, Kiyofumi Nitta, Hirona Yamagishi, Koji Amezawa, Takashi Nakamura
  • Journal Title: ACS Energy Lett. Volume: 7 Issue: 5 Pages: 1687-1693
  • DOI: 10.1021/acsenergylett.2c00353
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Experimental evidence of tetrahedral symmetry breaking in SiO2 glass under pressure (2022)
  • Author(s): Y. Kono, K. Ohara, N. Kondo, H. Yamada, S. Hiroi, F. Noritake, K. Nitta, O. Sekizawa, Y. Higo, Y. Tange, H. Yumoto, T. Koyama, H. Yamazaki, Y. Senba, H. Ohashi, S. Goto, I. Inoue, Y. Hayashi, K. Tamasaku, T. Osaka, J. Yamada, M. Yabashi
  • Journal Title: Nature Communications Volume: 13 Issue: 1 Pages: 2292-2292
  • DOI: 10.1038/s41467-022-30028-w
  • Peer Reviewed / Open Access
• [Journal Article] Natural nanoparticles of the critical element tellurium (2022)
  • Author(s): Missen Owen P.、Lausberg Ella R.、Brugger Jo、Etschmann Barbara、Mills Stuart J.、Momma Koichi、Ram Rahul、Maruyama Mihoko、Fang Xi-Ya、Melchiorre Erik、Ryan Christopher G.、Villalobos-Portillo Edgar E.、Castillo-Michel Hiram、Nitta Kiyofumi
  • Journal Title: Journal of Hazardous Materials Letters Volume: 3 Pages: 100053-100053
  • DOI: 10.1016/j.hazl.2022.100053
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Operando Cerium Distribution Analysis on Through-Plane Membrane Electrode Assemblies in 2nd-Generation MIRAI (2022)
  • Author(s): Orikasa Yuki、Takezawa Aika、Amemiya Kazuki、Tsuji Yoichiro、Asaoka Takahiko、Ohki Maria、Sekizawa Oki、Nitta Kiyofumi
  • Journal Title: ECS Transactions Volume: 109 Issue: 9 Pages: 109-116
  • DOI: 10.1149/10909.0109ecst
  • Peer Reviewed
• [Journal Article] Volcanic temperature changes modulated volatile release and climate fluctuations at the end-Triassic mass extinction (2022)
  • Author(s): Kaiho Kunio、Tanaka Daisuke、Richoz Sylvain、Jones David S.、Saito Ryosuke、Kameyama Daichi、Ikeda Masayuki、Takahashi Satoshi、Aftabuzzaman Md.、Fujibayashi Megumu
  • Journal Title: Earth and Planetary Science Letters Volume: 579 Pages: 117364-117364
  • DOI: 10.1016/j.epsl.2021.117364
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Shallow ocean oxygen decline during the end-Triassic mass extinction (2022)
  • Author(s): He Tianchen、Newton Robert J.、Wignall Paul B.、Reid Stephen、Dal Corso Jacopo、Takahashi Satoshi、Wu Hepin、Todaro Simona、Di Stefano Pietro、Randazzo Vincenzo、Rigo Manuel、Dunhill Alexander M.
  • Journal Title: Global and Planetary Change Volume: 210 Pages: 103770-103770
  • DOI: 10.1016/j.gloplacha.2022.103770
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Biomarker evidence for the prolongation of multiple phytoplankton blooms in the aftermath of the end-Permian mass extinction (2022)
  • Author(s): Saito Ryosuke、Tian Li、Kaiho Kunio、Takahashi Satoshi
  • Journal Title: Palaeogeography, Palaeoclimatology, Palaeoecology Volume: 600 Pages: 111077-111077
  • DOI: 10.1016/j.palaeo.2022.111077
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Maleimide index: a paleo-redox index based on fragmented fossil-chlorophylls obtained by chromic acid oxidation (2022)
  • Author(s): Asahina Kenta、Takahashi Satoshi、Saito Ryosuke、Kaiho Kunio、Oba Yasuhiro
  • Journal Title: RSC Advances Volume: 12 Issue: 48 Pages: 31061-31067
  • DOI: 10.1039/d2ra04702k
  • Peer Reviewed / Open Access
• [Presentation] Intensity of the ancient Martian magnetic field estimated from the strong magnetic anomaly data: strong or weak dynamo field? (2023)
  • Author(s): 佐藤雅彦、潮田雅司、中田亮一、田村裕二郎、山本伸次、小澤一仁、高橋 太
  • Organizer: JpGU2023
• [Presentation] Gallium isotopic composition of GSJ rock reference samples (2023)
  • Author(s): Chizu Kato, Rikuya Aso, Satoshi Fukutani, Ryoichi Nakada, Kazuya Nagaishi, Shigeyuki Wakaki and Toshiyuki Fujii
  • Organizer: Goldschmidt 2023
  • Int'l Joint Research
• [Presentation] In-situ nitrogen chemical speciation of alteration minerals in terrestrial Mars analog (2023)
  • Author(s): Ai Kurokawa, Mizuho Koike, Kento Onishi, Yuta Sumiya, Ryoichi Nakada, Haruna Sugahara, Tomohiro Usui and Hans E.F. Amundsen
  • Organizer: Goldschmidt 2023
  • Int'l Joint Research
• [Presentation] ノビアスキレートPA-1固相抽出法を用いた降雨及び降雪中鉛同位体分析の前処理 方法の検討及び MC-ICP-MS法を用いた夏季降雨中鉛の発生源識別 (2023)
  • Author(s): 所竣一、山本祐平、中田亮一、村瀬遼亮、今井昭二
  • Organizer: 日本分析化学会第72年会
• [Presentation] 地球岩石試料の高精度ガリウム同位体分析 (2023)
  • Author(s): 加藤千図、麻生陸也、福谷哲、中田亮一、永石一弥、若木重行、藤井俊行
  • Organizer: 日本原子力学会2023年秋の大会
• [Presentation] XANESによる化学種解析と層状ケイ酸塩中の元素組成に基づくリュウグウ母天体の水環境の推定 (2023)
  • Author(s): 河合敬宏、福士圭介、菅大輝、上椙真之、山下翔平、中田亮一、小池みずほ、吉田英人、松本恵、中村智樹、大浦正樹、高橋嘉夫
  • Organizer: 日本地球化学会第70回年会
• [Presentation] 火星の表層環境史解明に向けた火星隕石の局所窒素化学種解析 (2023)
  • Author(s): 大西健斗、小池みずほ、黒川愛、住谷優太、中田亮一、臼井寛裕、菅原春菜
  • Organizer: 日本惑星化学会2023年秋季講演会
• [Presentation] Estimation of the magnetic field intensity of ancient Mars using the magnetic anomaly data (2023)
  • Author(s): Masahiko Sato, Masashi Ushioda, Ryoichi Nakada, Yujiro Tamura, Shinji Yamamoto, Kazuhito Ozawa, Futoshi Takahashi, Ryoya Sakata, Kanako Seki
  • Organizer: AGU
  • Int'l Joint Research
• [Presentation] Nitrogen Chemical Speciation of Carbonates and Clay minerals in a Terrestrial Mars analog (2023)
  • Author(s): A. Kurokawa, M. Koike, K. Onishi, Y. Sumiya, R. Nakada, N. Tomioka, T. Okuchi, H. Sugahara, Chang Ching Wang, T. Usui, and Hans E. F. Amundsen
  • Organizer: the 86th annual meeting of The Meteoritical Society
  • Int'l Joint Research
• [Presentation] ケイ酸塩ガラス中における Zr の存在状態 (2023)
  • Author(s): 近藤望、河野義生、中田亮一、尾原幸治
  • Organizer: 日本地球化学会第70回年会
• [Presentation] 石灰質構成要素から明らかにする備北層群“藻類石灰岩”の堆積環境 (2023)
  • Author(s): 清水真音、中田亮一、白石史人
  • Organizer: 日本地質学会西日本支部会
• [Presentation] 愛媛県西予市に分布する鳥巣式石灰岩の堆積環境と堆積年代 (2023)
  • Author(s): 鬼頭岳大、中田亮一、白石史人
  • Organizer: 日本地質学会西日本支部会
• [Presentation] Depositional features and eukaryotic microfossils of Mesoproterozoic Chitrakoot Formation, Vindhyan Supergroup, the central India (2023)
  • Author(s): Abhishek Pandey, Partha P. Chakraborty, Ryoichi Nakada, Fumito Shiraishi
  • Organizer: 日本地質学会西日本支部会
• [Presentation] Toward decoding photoautotroph assemblage in the pelagic super ocean anoxia (2023)
  • Author(s): Satoshi Takahashi, Kenta Asahina, Yui Kouketsu
  • Organizer: JpGU2023
  • Invited
• [Presentation] 前期三畳紀の極端温暖化と直後の気候寒冷化に駆動された海洋無酸素化 (2023)
  • Author(s): 高橋 聡，山北 聡，武藤 俊，小嶋 智，海保邦夫，山崎慎一，土屋範芳，熊 怡俊，ポールトン サイモン，ポール ウィグナル，松本廣直，板井啓明，藤林 恵
  • Organizer: 地質学会第130年学術大会
• [Presentation] THERMOCHEMICAL SIMULATION OF BOCKFJORD VOLCANIC COMPLEX CARBONATES, A TERRESTRIAL MARTIAN ANALOG (2023)
  • Author(s): Chang-Chin Wang, Tomohiro Usui, Mohit Melwani-Daswani, Haruna Sugahara, Ryoichi Nakada, Mizuho Koike, Hans Amundsen
  • Organizer: LPSC
  • Int'l Joint Research
• [Presentation] IN-SITU NITROGEN SPECIATION OF SHERGOTTITE MARTIAN METEORITES AND TERRESTRIAL MARS ANALOG (2023)
  • Author(s): Mizuho Koike, Ai Kurokawa, Kento Onishi, Ryoichi Nakada, Yuta Sumiya, Tomohiro Usui, Haruna Sugahara, and Hans Amundsen
  • Organizer: LPSC
  • Int'l Joint Research
• [Presentation] 火星の「窒素循環史」解明に向けた局所窒素化学種解析 (2022)
  • Author(s): 小池みずほ, 大西健斗, 黒川愛, 中田亮一, 住谷優太, 菅原春菜, 臼井寛裕, Hans E. F.
  • Organizer: JpGU
• [Presentation] Characterization of Bockfjord Volcanic Complex Carbonates: Implication for Formation Process and Potential as Martian Analog (2022)
  • Author(s): Chang-Chin Wang, Haruna Sugahara, Tomohiro Usui, Ryoichi Nakada, Mizuho Koike, Hans Amundsen
  • Organizer: JpGU
• [Presentation] The redox disproportionation of ferric iron (Fe 2+ ) in a deep magma ocean may have formed highly oxidizing terrestrial magma ocean: Implications for planetary atmosphere (2022)
  • Author(s): Hideharu Kuwahara, Ryoichi Nakada, Shintaro Kadoya, Takashi Yoshino, Tetsuo Irifune
  • Organizer: JpGU
• [Presentation] 火星の表層環境史解明に向けたシャーゴッタイト隕石の局所窒素化学種解析 (2022)
  • Author(s): 大西健斗、 小池みずほ、 黒川愛、 住谷優太、 中田亮一、臼井寛裕、 菅原春菜
  • Organizer: 日本地球化学会第69回年会
• [Presentation] 火星の表層環境解明に向けたアナログ試料の局所窒素化学種分析 (2022)
  • Author(s): 黒川愛，小池みずほ，大西健斗，住谷優太，中田亮一，菅原春菜，臼井寛裕，Hans E. F. Amundsen
  • Organizer: 日本地球化学会第69回年会
• [Presentation] 希土類元素安定同位体比を用いたpH指標の開発 (2022)
  • Author(s): 中田亮一、横山文香、朝倉奈子、永石一弥
  • Organizer: 日本地球化学会第69回年会
• [Remarks] 研究代表者のホームページ
  • URL: https://sites.google.com/view/ryo-nakada/