Researcher Information
researchmap URL
Research History
- Apr. 2023 - Present
Hiroshima University, 大学院先進理工系科学研究科, 客員准教授 - Jul. 2021 - Present
Japan Agency for Marine-Earth Science and Technology, 高知コア研究所, 主任研究員 - Oct. 2020 - Jun. 2021
Japan Agency for Marine-Earth Science and Technology, 高知コア研究所, 副主任研究員 - Apr. 2019 - Sep. 2020
Japan Agency for Marine-Earth Science and Technology, 高知コア研究所, 研究員 - Oct. 2015 - Mar. 2019
Japan Agency for Marine-Earth Science and Technology, 高知コア研究所, 技術研究員 - Apr. 2014 - Sep. 2015
Tokyo Institute of Technology, Earth-Life Science Institute, WPI研究員 - Oct. 2013 - Mar. 2014
日本学術振興会, 特別研究員（PD） （早期学位取得による資格変更） - Apr. 2011 - Sep. 2013
日本学術振興会, 特別研究員（DC1）
Research activity information
Papers
- Wenshuai Li; Ryoichi Nakada; James McManus; Brian A. Haley; Mohsen Shakouri; Fulai Li; Yoshio Takahashi
Decoupling cerium isotope fractionation from cerium anomalies in marine sediments
Earth and Planetary Science Letters, Dec. 2025
671, 119652, 119652
[Reviewed] - Mizuho Sakurahara; Yoshio Kono; Ryoichi Nakada; Steeve Gréaux
Correlated behavior between valence state of iron and melt structure in (Mg,Fe)SiO3 melt
Chemical Geology, Nov. 2025
695, 123080, 123080
[Reviewed] - Yusuke Sawaki; Hisashi Asanuma; Ryoichi Nakada; Mariko Abe
Trace elements in igneous apatite: A case study of redox tracers in felsic plutons
Lithos, Jul. 2025
504-505, 108059, 108059
[Reviewed] - Yuanyuan Wang; Wenshuai Li; Ryoichi Nakada; Makoto Nagasawa; Jianxi Zhu; Hongping He; Yoshio Takahashi
Abnormally heavy cerium stable isotope composition in regolith: Implications for redox tracing
Geochimica et Cosmochimica Acta, Apr. 2025
[Reviewed] - Yoshio Kono; Chihiro Koyama; Nozomi M. Kondo; Koji Ohara; Hideharu Kuwahara; Ryoichi Nakada; Yuki Watanabe; Hirohisa Oda; Takehiko Ishikawa
Gravitational stability of iron-rich peridotite melt at Mars’ core-mantle boundary
Communications Earth & Environment, 03 Mar. 2025
6, 148
[Reviewed] - Wenshuai Li; Ryoichi Nakada; Yoshio Takahashi; Richard M. Gaschnig; Yongfeng Hu; Mohsen Shakouri; Roberta L. Rudnick; Xiao-Ming Liu
Cerium geochemical composition of the upper continental crust through time: Implications for tracing past surface redox conditions
Geochimica et Cosmochimica Acta, Oct. 2023
[Reviewed] - Iori Kajitani; Mizuho Koike; Ryoichi Nakada; Gaku Tanabe; Tomohiro Usui; Fumihiro Matsu'ura; Keisuke Fukushi; Tetsuya Yokoyama
Identification of carbonate-associated sulfate (CAS) in a Noachian Martian meteorite Allan Hills 84001
Earth and Planetary Science Letters, Oct. 2023
[Reviewed] - Hideharu Kuwahara; Ryoichi Nakada
Partitioning of Fe2+ and Fe3+ between bridgmanite and silicate melt: Implications for redox evolution of the Earth's mantle
Earth and Planetary Science Letters, Aug. 2023
615, 118197, 118197
[Reviewed] - Hideharu Kuwahara; Ryoichi Nakada; Shintaro Kadoya; Takashi Yoshino; Tetsuo Irifune
Hadean mantle oxidation inferred from melting of peridotite under lower-mantle conditions
Nature Geoscience, 04 May 2023
[Reviewed] - Wenshuai Li; Xiao-Ming Liu; Ryoichi Nakada; Yoshio Takahashi; Yongfeng Hu; Mohsen Shakouri; Zhaofeng Zhang; Takuma Okumura; Shinya Yamada
The cerium isotope fingerprints of redox fluctuation in bauxites
Earth and Planetary Science Letters, Jan. 2023
[Reviewed] - Yoshihiro Kakizkaki; Akihiro Kano; Yasuhiro Ota; Ryoichi Nakada; Kazuya Nagaishi; Kenji Kashiwagi
Pennsylvanian paleoclimatic record in rhythmites developed on an oceanic island of low-latitude Panthalassa
Sedimentary Geology, Oct. 2021
424, 105992, 105992
[Reviewed] - Masashi Shidare; Ryoichi Nakada; Tomohiro Usui; Minato Tobita; Kenji Shimizu; Yoshio Takahashi; Tetsuya Yokoyama
Survey of Impact Glasses in Shergottites Searching for Martian Sulfate Using X-ray Absorption Near-Edge Structure
Geochimica et Cosmochimica Acta, Aug. 2021
313, 85, 98
[Reviewed]
Corresponding - Fumihiro Matsu'ura; Ryoichi Nakada; Tomohiro Usui; Yusuke Sawaki; Yuichiro Ueno; Iori Kajitani; Masafumi Saitoh
Spatial distribution and speciation of sulfur in Ediacaran limestones with μ-XRF imaging and XANES spectroscopy: Implications for diagenetic mobilization of sulfur species
Geochimica et Cosmochimica Acta, Aug. 2021
306, 20, 43
[Reviewed] - Hideharu Kuwahara; Shoichi Itoh; Akimasa Suzumura; Ryoichi Nakada; Tetsuo Irifune
Nearly Carbon‐Saturated Magma Oceans in Planetary Embryos During Core Formation
Geophysical Research Letters, 28 May 2021
48, 10
[Reviewed] - Ryoichi Nakada; Gaku Tanabe; Iori Kajitani; Tomohiro Usui; Masashi Shidare; Tetsuya Yokoyama
EXAFS Determination of Clay Minerals in Martian Meteorite Allan Hills 84001 and Its Implication for the Noachian Aqueous Environment
Minerals, 08 Feb. 2021
11, 2, 176, 176
[Reviewed]
Corresponding - Kazuya Nagaishi; Ryoichi Nakada; Tsuyoshi Ishikawa
High-throughput isotope analysis of sub-nanogram sized lead using MC-ICP-MS with on-line thallium doping technique and desolvating nebulizer system
Geochemical Journal, Jan. 2021
55, 1, 1, 9
[Reviewed] - Nozomi M. Kondo; Yoshio Kono; Koji Ohara; Ryoichi Nakada; Toshiaki Ina; Etienne Skrzypek; Akihiro Yamada; Satoshi Saito
Interaction between Cerium and H2O in Hydrous Rhyolitic Melts
ACS Earth and Space Chemistry, 17 Dec. 2020
4, 12, 2281, 2288
[Reviewed] - Mizuho Koike; Ryoichi Nakada; Iori Kajitani; Tomohiro Usui; Yusuke Tamenori; Haruna Sugahara; Atsuko Kobayashi
In-situ preservation of nitrogen-bearing organics in Noachian Martian carbonates
Nature Communications, Dec. 2020
11, 1
[Reviewed] - Ryoichi Nakada; Tomohiro Usui; Masashi Ushioda; Yoshio Takahashi
Vanadium micro-XANES determination of oxygen fugacity in olivine-hosted glass inclusion and groundmass glasses of martian primitive shergottite Yamato 980459
American Mineralogist, 01 Nov. 2020
105, 11, 1695, 1703
[Reviewed]
Corresponding - Hideharu Kuwahara; Ryuichi Nomura; Ryoichi Nakada; Tetsuo Irifune
Corrigendum to “Simultaneous determination of melting phase relations of mantle peridotite and mid-ocean ridge basalt at the uppermost lower mantle conditions” [Phys. Earth Planet. Inter. 284 (2018) 36–50]. (Physics of the Earth and Planetary Interiors (2018) 284 (36–50), (S003192011730362X), (10.1016/j.pepi.2018.08.012))
Physics of the Earth and Planetary Interiors, 01 Jun. 2020
303 - Go-Ichiro Uramoto; Yuki Morono; Naotaka Tomioka; Shigeyuki Wakaki; Ryoichi Nakada; Rota Wagai; Kentaro Uesugi; Akihisa Takeuchi; Masato Hoshino; Yoshio Suzuki; Fumito Shiraishi; Satoshi Mitsunobu; Hiroki Suga; Yasuo Takeichi; Yoshio Takahashi; Fumio Inagaki
Significant contribution of subseafloor microparticles to the global manganese budget
Nature Communications, Dec. 2019
10, 1
[Reviewed] - Ryoichi Nakada; Masahiko Sato; Masashi Ushioda; Yujiro Tamura; Shinji Yamamoto
Variation of Iron Species in Plagioclase Crystals by X‐ray Absorption Fine Structure Analysis
Geochemistry, Geophysics, Geosystems, 26 Nov. 2019
20, 11, 5319, 5333
[Reviewed]
Corresponding - 中田 亮一
希土類元素（REE）地球化学の新展開：REE有機地球化学とREE安定同位体地球化学
地球化学, Sep. 2019
53, 3, 107, 124
[Reviewed], [Invited]
Corresponding - H. Kuwahara; S. Itoh; R. Nakada; T. Irifune
The Effects of Carbon Concentration and Silicate Composition on the Metal‐Silicate Partitioning of Carbon in a Shallow Magma Ocean
Geophysical Research Letters, 28 Aug. 2019
46, 16, 9422, 9429
[Reviewed] - Hideharu Kuwahara; Takanori Kagoshima; Ryoichi Nakada; Nobuhiro Ogawa; Asuka Yamaguchi; Yuji Sano; Tetsuo Irifune
Fluorine and chlorine fractionation during magma ocean crystallization: Constraints on the origin of the non-chondritic F/Cl ratio of the Earth
Earth and Planetary Science Letters, Aug. 2019
520, 241, 249
[Reviewed] - Hideharu KUWAHARA; Ryuichi NOMURA; Ryoichi NAKADA; Tetsuo IRIFUNE
Melting Phase Relations of KLB-1 Peridotite and Mid-Ocean Ridge Basalt and Gravitational Stabilities of Partical Silicate Melts at the Uppermost Lower Mantle
The Review of High Pressure Science and Technology, Jul. 2019
29, 2, 75, 85
[Reviewed] - Satoshi Takahashi; Ryoichi Nakada; Yusuke Watanabe; Yoshio Takahashi
Iron-depleted pelagic water at the end-Permian mass extinction inferred from chemical species of iron and molybdenum in deep-sea sedimentary rocks
Palaeogeography, Palaeoclimatology, Palaeoecology, Feb. 2019
516, 384, 399
[Reviewed]
Corresponding - Ryoichi Nakada
Examination of analytical conditions of cerium (Ce) isotope and stable isotope ratio of Ce in geochemical standards
GEOCHEMICAL JOURNAL, 2019
53, 5, 293, 304
[Reviewed]
Corresponding - Ryoichi Nakada
Simultaneous determination of melting phase relations of mantle peridotite and mid-ocean ridge basalt at the uppermost lower mantle conditions
Physics of the Earth and Planetary Interiors, Nov. 2018
284, 36, 50
[Reviewed] - M. Sato; Y. Yamamoto; T. Nishioka; K. Kodama; N. Mochizuki; M. Ushioda; R. Nakada; H. Tsunakawa
Constraints on the Source of the Martian Magnetic Anomalies Inferred From Relaxation Time of Remanent Magnetization
Geophysical Research Letters, 16 Jul. 2018
45, 13, 6417, 6427
[Reviewed] - 佐藤 雅彦; 山本 裕二; 西岡 孝; 小玉 一人; 望月 伸竜; 潮田 雅司; 中田 亮一; 綱川 秀夫
残留磁化緩和時間に基づく火星磁気異常ソースの評価
日本惑星科学会誌, 2018
27, 173, 179
[Reviewed] - Nakada, R.; Tanaka, M.; Tanimizu, M.; Takahashi, Y.
Aqueous speciation is likely to control the stable isotopic fractionation of cerium at varying pH
Geochimica et Cosmochimica Acta, 2017
218, 273, 290
[Reviewed]
Corresponding - Nakada, R.; Shibuya, T.; Suzuki, K.; Takahashi, Y.
Europium anomaly variation under low-temperature water-rock interaction: A new thermometer
Geochemistry International, 2017
55, 9, 822, 832
[Reviewed]
Corresponding - Nakada, R.; Waseda, A.; Okumura, F.; Takahashi, Y.
Impact of the decarboxylation reaction on rare earth elements binding to organic matter: From humic substances to crude oil
Chemical Geology, 2016
420, 231, 239
[Reviewed]
Corresponding - Nakada, R.; Takahashi, Y.; Tanimizu, M.
Cerium stable isotope ratios in ferromanganese deposits and their potential as a paleo-redox proxy
Geochimica et Cosmochimica Acta, 2016
181, 89, 100
[Reviewed]
Corresponding - Yamanaka, T.; Nagashiov, H.; Nishio, R.; Kondo, K.; Noguchi, T.; Okamura, K.; Nunoura, T.; Makita, H.; Nakamura, K.; Watanabe, H.; Inoue, K.; Toki, T.; Iguchi, K.; Tsunogai, U.; Nakada, R.; Ohshima, S.; Toyoda, S.; Kawai, J.; Yoshida, N.; Ijiri, A.; Sunamura, M.
The Tarama Knoll: Geochemical and Biological Profiles of Hydrothermal Activity
Subseafloor Biosphere Linked to Hydrothermal Systems: TAIGA Concept, 2015
497, 504
[Reviewed] - Ikeda, M.; Hori, R.S.; Okada, Y.; Nakada, R.
Volcanism and deep-ocean acidification across the end-Triassic extinction event
Palaeogeography, Palaeoclimatology, Palaeoecology, 2015
440, 725, 733
[Reviewed] - Takahashi, Y.; Hayasaka, Y.; Morita, K.; Kashiwabara, T.; Nakada, R.; Marcus, M.A.; Kato, K.; Tanaka, K.; Shimizu, H.
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
Geochemical Journal, 2015
49, 6, 653, 674
[Reviewed] - Nakada, Ryoichi; Ogawa, Kazuhiro; Suzuki, Noritoshi; Takahashi, Satoshi; Takahashi, Yoshio
Late Triassic compositional changes of aeolian dusts in the pelagic Panthalassa: Response to the continental climatic change
Palaeogeography Palaeoclimatology Palaeoecology, 2014
393, 61, 75
[Reviewed]
Corresponding - Nakada, R.; Shirai, T.; Takahashi, S.; Suzuki, N.; Ogawa, K.; Takahashi, Y.
A geochemical constraint on the formation process of a manganese carbonate nodule in the siliceous mudstone of the Jurassic accretionary complex in the Mino Belt, Japan
Journal of Asian Earth Sciences, 2014
96, 59, 68
[Reviewed]
Corresponding - Nakada, Ryoichi; Takahashi, Yoshio; Tanimizu, Masaharu
Isotopic and speciation study on cerium during its solid-water distribution with implication for Ce stable isotope as a paleo-redox proxy
Geochimica Et Cosmochimica Acta, 2013
103, 49, 62
[Reviewed]
Corresponding - Nakada, Ryoichi; Tanimizu, Masaharu; Takahashi, Yoshio
Difference in the stable isotopic fractionations of Ce, Nd, and Sm during adsorption on iron and manganese oxides and its interpretation based on their local structures
Geochimica Et Cosmochimica Acta, 2013
121, 105, 119
[Reviewed]
Corresponding - Etiope, G.; Nakada, R.; Tanaka, K.; Yoshida, N.
Gas seepage from Tokamachi mud volcanoes, onshore Niigata Basin (Japan): Origin, post-genetic alterations and CH4-CO2 fluxes
Applied Geochemistry, 2011
26, 3, 348, 359
[Reviewed] - Nakada, Ryoichi; Takahashi, Yoshio; Tsunogai, Urumu; Zheng, Guodong; Shimizu, Hiroshi; Hattori, Keiko H.
A geochemical study on mud volcanoes in the Junggar Basin, China
Applied Geochemistry, 2011
26, 7, 1065, 1076
[Reviewed]
Corresponding - Nakada, R.; Takahashi, Y.; Zheng, G.; Yamamoto, Y.; Shimizu, H.
Abundances of rare earth elements in crude oils and their partitions in water
Geochemical Journal, 2010
44, 5, 411, 418
[Reviewed]
Misc.
- 中田 亮一; 谷水 雅治; 高橋 嘉夫
Stable Isotopic and Chemical Speciation Studies on Neo-rare Earth Element Geochemistry
化學工業, Sep. 2013
64, 9, 671, 677
