Akira Usui

Best Publications

• Discriminating between different genetic types of marine ferro-manganese crusts and nodules based on rare earth elements and yttrium

  M. Bau;K. Schmidt;A. Koschinsky;J. Hein

  580
  Citations

• Chemical and structural control of the partitioning of Co, Ce, and Pb in marine ferromanganese oxides

  Yoshio Takahashi;Alain Manceau;Nicolas Geoffroy;Matthew A. Marcus

  340
  Citations

• Direct observation of tetravalent cerium in ferromanganese nodules and crusts by X-ray-absorption near-edge structure (XANES)

  Yoshio Takahashi;Hiroshi Shimizu;Akira Usui;Hiroyuki Kagi

  195
  Citations

• Distribution and composition of marine hydrogenetic and hydrothermal manganese deposits in the northwest Pacific

  Unknown

  194
  Citations

• Molecular-scale mechanisms of distribution and isotopic fractionation of molybdenum between seawater and ferromanganese oxides

  Teruhiko Kashiwabara;Yoshio Takahashi;Masaharu Tanimizu;Akira Usui

  173
  Citations

• Nanoscale InP Islands for Quantum Box Structures by Hydride Vapor Phase Epitaxy

  Jouni Ahopelto;A. Atsushi Yamaguchi;Kenichi Nishi;Akira Usui

  146
  Citations

• Tungsten species in natural ferromanganese oxides related to its different behavior from molybdenum in oxic ocean

  Teruhiko Kashiwabara;Teruhiko Kashiwabara;Yoshio Takahashi;Matthew A. Marcus;Tomoya Uruga

  137
  Citations

• Structural stability of marine 10 Å manganates from the Ogasawara (Bonin) Arc: Implication for low-temperature hydrothermal activity

  Unknown

  125
  Citations

• Continuous growth of hydrogenetic ferromanganese crusts since 17 Myr ago on Takuyo-Daigo Seamount, NW Pacific, at water depths of 800-5500 m

  Akira Usui;Keisuke Nishi;Hisaaki Sato;Yoshio Nakasato

  122
  Citations

• Geochemistry of low-temperature water–rock interaction: evidence from natural waters, andesite, and iron-oxyhydroxide precipitates at Nishiki-numa iron-spring, Hokkaido, Japan

  Michael Bau;Akira Usui;Bernhard Pracejus;Naoki Mita

  114
  Citations

• Submarine hydrothermal manganese deposits from the Ogasawara (Bonin) Arc, off the Japan Islands

  Unknown

  107
  Citations

• Uranium isotope systematics of ferromanganese crusts in the Pacific Ocean: Implications for the marine 238U/235U isotope system

  Kosuke T. Goto;Ariel D. Anbar;Gwyneth W. Gordon;Stephen J. Romaniello

  105
  Citations

• Evidence for hydrothermal venting in Fe isotope compositions of the deep Pacific Ocean through time

  N.-C. Chu;C. M. Johnson;B. L. Beard;C. R. German

  101
  Citations

• Geochemistry and Mineralogy of a Modern Buserite Deposit from a Hot Spring in Hokkaido, Japan

  Unknown

  98
  Citations

• OXYGEN ISOTOPE ANALYSES OF CHEMICALLY AND MICROBIALLY PRODUCED MANGANESE OXIDES AND MANGANATES

  Kevin W. Mandernack;Kevin W. Mandernack;Marilyn L. Fogel;Bradley M. Tebo;Akira Usui

  98
  Citations

• Ultrafine-scale magnetostratigraphy of marine ferromanganese crust

  Hirokuni Oda;Akira Usui;Isoji Miyagi;Masato Joshima

  79
  Citations

• Submersible observations of hydrothermal manganese deposits on the Kaikata Seamount, Izu-Ogasawara (Bonin) Arc

  Unknown

  78
  Citations

• Manganese microchimneys buried in the Central Pacific pelagic sediments: evidence of intraplate water circulation?

  Akira Usui;Michael Bau;Yamazaki Toshitsugu

  72
  Citations

• Submarine Hydrothermal Mineralization on the Izu–Bonin Arc, South of Japan: An Overview

  Unknown

  64
  Citations

• Nickel and copper accumplation as essential elements in 10-Å manganite of deep-sea manganese nodules

  Unknown

  62
  Citations