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Shimaki, Y. and Arakawa, M. (2012) Low-velocity collisions between centimeter-sized snowballs: Porosity dependence of coefficient of restitution for ice aggregates analogues in the Solar System. Icarus, 221(1), 310-319. [Link]


Usui, T. (2011) New views of Mars: Reviews of recent Mars explorations and meteorites studies. Chikyu Kagaku. 45, 159-173. [Link]

Shimaki, Y., Arakawa, M., and Yasui, M. (2011). Impact Experiments on Sintered Snowballs. in Physics and Chemistry of Ice 2010, Hokkaido University Press, 379-386.


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. [Link]

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. [Link]


Arakawa, M., Yasui, M., and Shimaki, Y. (2009) Collisional Disruption of Icy Planetesimals. The astronomical herald 102(2), 127-133.


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–Planets 113, E12S44, doi:10.1029/2008JE003225 [Link]

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


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. [Link]

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. [Link]


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. [Link]

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. Journal of Petrology 47, 929–964. [Link]


Usui, T., Nakamura, E., Kobayashi, K., Maruyama, S., and Helmstaedt, H. (2003). Fate of the subducted Farallon plate inferred from eclogite xenoliths in the Colorado Plateau. Geology 30, 589-592. [Link]


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. [Link]