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All abstracts by Akira Usui in conference series: Goldschmidt

(2020) Modern Precipitation of Ferromanganese Oxides and Metal Accumulation during 12-15-Yr on-Site Experiment at NW Pacific Seamounts
Usui A, Hino H, Suzushima D, Kashiwabara T, Tomioka N & Yamaoka K

(2019) Neodymium Isotopic Composition of Surface Layer of Ferromanganese Crusts Collected from Two Seamounts Located at the Northwest Pacific
Amakawa H, Usui A & Suzuki K

(2019) Tellurium Isotope Analysis for the Surface Layer of the Ferromanganese Crusts from Two Seamounts in Northwest Pacific
Fukami Y, Kashiwabara T, Amakawa H, Shibuya T, Usui A & Suzuki K

(2017) Stable Isotope Variation of Tellurium in Surface Layer of Marine Ferromanganese Crusts
Fukami Y, Kashiwabara T, Usui A, Kimura J-I & Suzuki K

(2016) Speciation of Platinum in Marine Ferromanganese Oxides Using Wavelength-Dispersive XAFS
Kashiwabara T, Watanabe Y, Sekizawa O, Nitta K, Terada Y, Uruga T, Usui A, Hein J & Takahashi Y

(2016) Constant Iron Isotopic Composition of Pacific Deep Water over the Last 20 Ma
Yamaoka K, Borrok D & Usui A

(2016) Fractionation of Zirconium-Hafnium in Ferromanganese Crusts
Inagaki J, Sakaguchi A, Inoue M, Usui A, Haba H, Kashiwabara T, Yamasaki S, Sueki K & Takahashi Y

(2015) Evidences for Continuous Growth of Hydrogenetic Ferromanganese Crusts Since ca. 20 Ma over the Depths of NW Pacific
Usui A, Nishi K, Sato H & Graham I

(2014) Cd Isotopic Composition of Ferromanganese Crusts as a Proxy of Ocean Productivity
Yamaoka K, Ma L & Usui A

(2014) Chemical Processes for the Extreme Enrichment of Te into Marine Ferromanganese Oxides
Kashiwabara T, Oishi Y, Sakaguchi A, Sugiyama T, Usui A & Takahashi Y

(2014) Uranium Isotope in Ferromanganese Crusts: Implications for the Marine 238U/235U Isotope System
Goto K, Anbar A, Gordon G, Romaniello S, Shimoda G, Takaya Y, Tokumaru A, Nozaki T, Suzuki K, Machida S, Hanyu T & Usui A

(2013) Iron Isotopic Composition of Submarine Hydrogenetic, Diagenetic, and Hydrothermal Ferromanganese Deposits
Yamaoka K, Borrok D, Usui A & Kawahata H

(2012) Temporal and Depth Variation of Os Isotope Composition in Ferromanganese Crusts from the Takuyo Daigo Seamount (#5 Takuyo Smt), Northwestern Pacific Ocean
Tokumaru A, Nozaki T, Goto KT, Takaya Y, Suzuki K, Chang Q, Kato Y, Usui A & Urabe T

(2003) Secular Fe Isotope Variations in the NW and Central Pacific Ocean
Chu N, Johnson C, Beard B, German C, Nesbitt R & Usui A

(2000) A New Method for the Determination of Ce(III) / Ce(IV) Ratios in Rocks; Application to Weathering, Sedimentary, and Diagenetic Processes
Takahashi Y, Shimizu H, Kagi H, Yoshida H, Usui A & Nomura M

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