Tomohiro Usui

Peer-reviewed papers:


  • Usui, T. (2017) Hydrogen reservoirs in Mars as revealed by SNC meteorites. Volatiles In The Martian Crust (eds. Filiberoto J. and Schwenzer S. P.), Elsevier B.V. [Link
    Coupled Pb isotopic and trace element systematics of the Tissint meteorite: Geochemical signatures of the depleted shergottite source mantle
  • Coupled Pb isotopic and trace element systematics of the Tissint meteorite: Geochemical signatures of the depleted shergottite source mantle
    Earth and Planetary Science LettersMoriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (in press) 
    Coupled Pb isotopic and trace element systematics of the Tissint meteorite: Geochemical signatures of the depleted shergottite source mantle
    Earth and Planetary Science Letters
  • Moriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (in press) 
    Coupled Pb isotopic and trace element systematics of the Tissint meteorite: Geochemical signatures of the depleted shergottite source mantle
    Earth and Planetary Science LettersMoriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (in press)edere
    Moriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (2017) Coupled Pb isotopic and trace element systematics of the Tissint meteorite: Geochemical signatures of the depleted shergottite source mantle, 

    Earth and Planet. Sci. Lett.

     474, 180-189. [Link]
    Earth and Planetary Science LettersMoriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (in press) 
  • Coupled Pb isotopic and trace element systematics of the Tissint meteorite: Geochemical signatures of the depleted shergottite source mantle
    Earth and Planetary Science Letters

  • arth and Planetary Science LettersMoriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (in press)edere
  • Moriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (in press)Moriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (in press) Coupled Pb isotopic and trace element systematics of the Tissint meteorite: Geochemical signatures of the depleted shergottite source mantleEarth and Planetary Science LettersMoriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (in press) Coupled Pb isotopic and trace element systematics of the Tissint meteorite: Geochemical signatures of the depleted shergottite source mantleEarth and Planetary Science Letters
  • Moriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (in press) Coupled Pb isotopic and trace element systematics of the Tissint meteorite: Geochemical signatures of the depleted shergottite source mantleEarth and Planetary Science LettersMoriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (in press)edereMoriwaki, T., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., Tobita, M. (2017) Coupled Pb isotopic and trace element systematics of the Tissint meteorite: Geochemical signatures of the depleted shergottite source mantle, Earth and Planet. Sci. Lett. 474, 180-189. [Link]
  • Tobita, M., Usui, T., Yokoyama, T. (2017) New Constraints on Shergottite petrogenesis from analysis of Pb isotopic compositional space: implications for mantle heterogeneity and crustal assimilation on Mars. Geochemical Journal 51, 81-94. [Link]
    Geochemical Journal, in press, 2016.
  • Kitadai, N., Oonishi, H.,Umemoto, K., Usui, T., Fukushi, K. and Nakashima, S. (2017) Glycine polymerization on oxide minerals. Origins of Life and Evolution of Biospheres, DOI: 10.1007/s11084-016-9516-z [Link]
  • Fukami, Y., Tobita, M., Yokoyama, T. Usui, T., Moriwaki, R. (2017) Precise isotope analysis of sub-nanogram lead by total evaporation thermal ionization mass spectrometry (TE-TIMS) coupled with a 204Pb–207Pb double spike method. Journal of Analytical Atomic Spectrometry, 32, 848-857. [Link]
  • Ehlmann, B. L. et al. including Usui, T. (2016) The sustainability of habitability on terrestrial planets: insights, questions, and needed measurements from Mars for understanding the evolution of Earth-like worlds. Journal of Geophysical Research-Planets, DOI: 10.1002/2016JE005134 [Open Access]
  • Kurokawa, H., Usui, T. and Sato, M. (2016) Interactive evolution of multiple water-ice reservoirs on Mars: Insight from hydrogen isotope compositions. Geochemical Journal, 50,  67–79. [Link]

  • Miyamoto, H., Komatsu, G., Dohm, J., Hammi, R., Usui, T., and Yamagishi, A. (2016) Geomorphological view of the environmental history and candidate habitable environments on Mars. Journal of Geography, 125, 171-184. [Link]

  • Peters, T. J., Simon, J. I., Jones, J. H., Usui, T., Moriwaki, R., Economos,  R. C., Schmitt, A. K., and McKeegan, K. D. (2015) Tracking the source of the enriched martian meteorites in olivine-hosted melt inclusions of two depleted shergottites, Yamato 980459 and Tissint. 

    Earth Planet. Sci. Lett.

     418, 91–102. [Link]

  • Usui T., Alexander C. M.O'D., Wang J., Simon J. I., and Jones J. H.  (2015) Meteoritic evidence for a previously unrecognized hydrogen reservoir on Mars. Earth Planet. Sci. Lett.

     410, 140-151. [Link] [press release] [top rated article in EPSL]
  • Usui T., Jones J. H., and Mittlefehldt D. W. (2015) A partial melting study of an ordinary (H) chondrite composition with application to the unique achondrite Graves Nunataks 06128 and 06129. 

    Meteoritics & Planetary Science. 50, 759-781. [Link]

  • A.N.E. Asaah, T. Yokoyama, F.T. Aka, T. Usui, T. Kuritani, M.J. Wirmvem, H. Iwamori, E.M. Fozing, J. Tamen, G.Z. Mofor, T. Ohba, G. Tanyileke, and J.V. Hell. (2015) Geochemistry of lavas from maar-bearing volcanoes in the Oku Volcanic Group of the Cameroon Volcanic Line.Chemical Geology 406, 55-69. [Link]
  • Usui T. and Miyamoto H. (2014) Toward Future Mars Exploration Missions: Our Heritage and New Challenges. Chikyu-Kagaku (Geochemical journal published by the Geochemical Society of Japan, in Japanese). 48, 221‒230. [Link]
  • Kurokawa H., Sato M., Ushioda M., Matsuyama T., Moriwaki R. Dohm, J. M., and Usui, T. (2014) Evolution of Water Reservoirs on Mars: Constraints from Hydrogen Isotopes in Martian Meteorites.  Earth Planet. Sci. Lett. 394, 179-185. [Link] [Press release]
  • Asaah A. N. E., Yokoyama T., Aka, F. T., Usui T., Wirmvem M. J., Tchamabe B. C., Ohba T., Tanyileke G., and Hell J. V. (2014) A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints. Geoscience Frontiers. DOI: 10.1016/j.gsf.2014.04.012

  • Usui T. and Iwamori H. (2013) Mixing relations of the howardite-eucrite-diogenite suite: a new statistical approach of independent component analysis for the Dawn mission. 

    Meteoritics & Planetary Science. 

    48, 2289-2299
  • Namiki N, Komatsu G, and Usui T et al. (2012) A proposal for rover geological exploration on Mars (in Japanese). The Journal of the Geological Society of Japan. 118, 606-617.
  • Usui T., Alexander C. M.O'D., Wang J., Simon J. I., and Jones J. H. (2012) Origin of water and mantle–crust interactions on Mars inferred from hydrogen isotopes and volatile element abundances of olivine-hosted melt inclusions of primitive shergottites. Earth Planet. Sci. Lett. 357-358, 119-129. [Link] [Press release]
  • Usui T. (2011) New views of Mars: Reviews of recent Mars explorations and meteorites studies.Chikyu-Kagaku (Geochemical journal published by the Geochemical Society of Japan, in Japanese45, 159-173.  

  • Usui T., Sanborn M., Wadhwa M., and McSween 

    H. Y. 

     (2010). Petrology and trace element geochemistry of Robert Massif 04261 and 04262 meteorites, the first examples of geochemically enriched lherzolitic shergottites. Geochimica et Cosmochimica Acta. 74, 7283-7306.

  • Usui T.

    , McSween 

    H. Y.

    , Mittlefehldt 

    D. W., 

    and Prettyman 

    T. H. 

    (2010). K-Th-Ti systematics and new three-component mixing model of HED meteorites: Prospective study for interpretation of gamma-ray and neutron spectra for the Dawn mission. Meteoritics & Planetary Science 45,1170-1190. 

  • Usui T., McSween 

    H. Y.

    , and Clark 

    B. C. 

    III. (2008). Petrogenesis of high-phosphorous Wishstone-class rocks in Gusev crater, Mars. Journal of Geophysical Research–Planets113, E12S44, doi:10.1029/2008JE003225.

  • Usui T., McSween H. Y., and Floss C. (2008). Petrogenesis of olivine-phyric shergottite Yamato-980459, revisited. Geochimica et Cosmochimica Acta 72, 1711-1730.

  • Usui T. and McSween 

    H. Y.

     (2007). Geochemistry of 4 Vesta based on HED meteorites: Prospective study for interpretation of gamma ray and neutron spectra for the Dawn mission.Meteoritics & Planetary Science 42, 269–283.

  • Usui T., Kobayashi K., Nakamura E., and Helmstaedt H. (2007). Trace element fractionation in deep subduction zones inferred from a lawsonite-eclogite xenolith from the Colorado Plateau.Chemical Geology 239, 336-351.

  • Kuritani T., Usui T., Yokoyama T., and Nakamura E. (2006). Accurate isotopic and concentration analyses of small amounts of Pb using isotope dilution coupled with the double spike technique.Geostandards and Geoanalytical Research 30, 209-220. 

  • Usui T., Nakamura E., and Helmstaedt H. (2006). Petrology and geochemistry of eclogite xenoliths from the Colorado Plateau: Implications for the evolution of the subducted oceanic crust. 
  • Usui T., Nakamura E., Kobayashi K., Maruyama S., and H. Helmstaedt (2003). Fate of the subducted Farallon plate inferred from eclogite xenoliths in the Colorado Plateau. Geology 30, 589-592.

  • Usui T., Kobayashi K, and Nakamura E. (2002). U-Pb isotope systematics of micro-zircon inclusions: Implications for the age and origin of eclogite xenolith from the Colorado Plateau.Proceedings of the Japan Academy 78, 51-56. 

Others articles:

  • Usui T. (2015) Evolution of water reservoirs on Mars: New insights from hydrogen isotope analysis. Isotope News, 10. 2-5. 
  • Usui T. and Namiki N. (2011). Report of the 4th Mars Science Laboratory Landing Site Workshop. Planetary Geology News 23 (issue 1), 1-3. (in Japanese).
  • Usui T. (2010). Reviews of Scientific Results of Mars Exploration Rovers (in Japanese). In Why is Mars Red?  Eds. H. Miyamoto, N. Hirata, and S. Tachibana. The University Museum, The University of Tokyo. 
  • Simon A. C., King R. L., Pettke T., and Usui T. (2007). Preface: Chemical and physical processes affecting element mobility from the slab to the surface. Chemical Geology 239, 179-181.