Takei and Hiraga Lab, Division of Earth and Planetary Materials Science, Earthquake Research Institute,The University of Tokyo

平賀研

(37) K. Yabe and T. Hiraga (2020) Grain boundary diffusion creep of olivine: 2. Solidus effects and consequences for the viscosity of the oceanic upper mantle. Journal of Geophysical Research: Solid Earth.
(36) K. Yabe, K. Sueyoshi, T. Hiraga (2020) Grain boundary diffusion creep of olivine: 1. Experiments at 1 atm. Journal of Geophysical Research: Solid Earth.
(35) Koizumi, S., Hiraga, T., Suzuki, T. S. (2020). Vickers indentation tests on olivine: size effects. Physics and Chemistry of Minerals, 47(2), 8.
(34) Nakakoji, T., Hiraga, T., Nagao, H., Ito, S., & Kano, M. (2018). Diffusion creep and grain growth in forsterite+ 20 vol% enstatite aggregates: 1. High‐resolution experiments and their data analyses. Journal of Geophysical Research: Solid Earth, 123(11), 9486-9512.
(33) Nakakoji, T., & Hiraga, T. (2018). Diffusion creep and grain growth in forsterite+ 20 vol% enstatite aggregates: 2. Their common diffusional mechanism and its consequence for weak‐temperature‐dependent viscosity. Journal of Geophysical Research: Solid Earth, 123(11), 9513-9527.
(32) Maruyama, G., & Hiraga, T. (2017). Grain‐to multiple‐grain‐scale deformation processes during diffusion creep of forsterite+ diopside aggregate: 1. Direct observations. Journal of Geophysical Research: Solid Earth, 122(8), 5890-5915.
(31) Maruyama, G., & Hiraga, T. (2017). Grain‐to multiple‐grain‐scale deformation processes during diffusion creep of forsterite+ diopside aggregate: 2. Grain boundary sliding‐induced grain rotation and its role in crystallographic preferred orientation in rocks. Journal of Geophysical Research: Solid Earth, 122(8), 5916-5934.
(30) 平賀 岳彦, 岩石 vs ファインセラミックス, 地質学雑誌, 123, 379-390, 2017
(29) Koizumi, S., Suzuki, T. S., Sakka, Y., Yabe, K., & Hiraga, T. (2016). Synthesis of crystallographically oriented olivine aggregates using colloidal processing in a strong magnetic field. Physics and Chemistry of Minerals, 43(10), 689-706.
(28) Tasaka, M., Hiraga, T. and Michibayashi, K., Influence of mineral fraction on the rheological properties of forsterite + enstatite during grain size sensitive creep: 3 Application of grain growth and flow laws on peridotite ultramylonite, J. Geophys. Res., DOI:10.1002/2013JB010619, 2014.
(27) Tasaka, M. and Hiraga, T. , Influence of mineral fraction on the rheological properties of forsterite + enstatite during grain size sensitive creep 1: Grain size and grain growth laws. , J. Geophys. Res., 118, DOI: 10.1002/jgrb.50285, 2013.
(26) Tasaka, M., Hiraga, T. and Zimmerman, M.E. , Influence of mineral fraction on the rheological properties of forsterite + enstatite during grain size sensitive creep 2: Deformation experiments, J. Geophys. Res., 118, DOI: 10.1002/jgrb.50284, 2013.
(25) Hiraga, T., Miyazaki, T. Yoshida, H. and Zimmerman, M.E., Comparison of microstructures in superplastically deformed synthetic materials and natural mylonites: Mineral aggregation via grain boundary sliding, Geology, 41, 9, 959-962, 2013.
(24) Miyazaki, T., Sueyoshi, K. and Hiraga T., Olivine crystals align　during diffusion creep of Earth’s upper mantle, Nature, 502, 321-326, 2013.
(23) 平賀岳彦、渡部泰史、宮崎智詞, 粒間流体の実態, 地球化学, 46, 231-242, 2012.
(22) McCarthy, C., Y. Takei, Y. and T. Hiraga, Experimental study of attenuation and dispersion over a broad frequency range: 2. The universal scaling of polycrystalline materials., J. Geophys. Res., 116, doi:10.1029/2011JB008384, 2011.
(21) Hiraga, T., Tachibana, C., Ohashi, N. and Sano, S., Grain growth systematics for forsterite ± enstatite aggregates: effect of lithology on grain size in the upper mantle, Earth Planet. Sci. Lett., 291, 10-20, 2010.
(20) Koizumi, S., Hiraga, T., Tachibana, C.,Tasaka, M., Miyazaki, T., Kobayashi, T., Takamasa, A., Ohashi, N. and Sano, S., Synthesis of highly dense and fine-grained aggregates of mantle composites by vacuum sintering of nano-sized mineral powders, Physics and Chemistry of Minerals, 37, 505-518, 2010.
(19) Hiraga, T., T. Miyazaki, T., M. Tasaka and H. Yoshida, Mantle superplasticity and its self-made demise, Nature, 468, 1091-1095, 2010.
(18) Hiraga, T. and Kohlstedt, D.L., Systematic distribution of incompatible elements in mantle peridotite: Importance of intra- and inter-granular melt-like components, Contrib. Mineral. Petrol., 158, 149-167, 2009.
(17) Goergen, E., Whitney, D.L., Zimmerman, M.E. and Hiraga, T., Deformation-induced polymorphic transformation: experimental deformation of kyanite, andalusite, and sillimanite, Tectonophysics, 454, 23-35, 2008.
(16) Hiraga, T., Hirschmann, M.M. and Kohlstedt, D.L., Equilibrium interface segregation in the diopside-forsterite system II: Applications of interface enrichment to mantle geochemistry. , Geochimica et Cosmochimica Acta, 71, 1281-1289, 2007.
(15) Hiraga, T., Kohlstedt, D.L., Equilibrium interface segregation in the diopside-forsterite system I: Analytical techniques, thermodynamics, and segregation characteristics, Geochimica et Cosmochimica Acta, 71, 1266-1280, 2007.
(14) Jung, H., Katayama, I., Jiang, Z., Hiraga, T. and Karato, S., Effect of water and stress on the lattice preferred orientation. , Tectonophysics, 421, 1-22, 2006.
(13)Chen, S., Hiraga, T. and Kohlstedt, D.L. , Water weakening of clinopyroxene in the dislocation creep regime. , J. Geophys. Res., 111, B8, B08203, 2006.
(12) Hiraga, T., Anderson, I.M. and Kohlstedt, D.L., Grain boundaries as reservoirs of incompatible elements in the Earth's mantle. , Nature, 427, 699-703, 2004.
(11) Wang, Z., Hiraga, T. and Kohlstedt, D.L., Effect of hydrogen on Fe-Mg interdiffusion in olivine. , Applied Physics Letters, 85, 209-211, 2004.
(10)Hiraga, T., Anderson, I.M. and Kohlstedt, D.L. , Chemistry of grain boundaries in mantle rocks., American Mineralogist, 88, 1015-1019, 2003.
(9) Holtzman, B.K., Kohlstedt, D.L., Zimmerman, M.E., Heidelbach, F., Hiraga, T. and Hustoft,J., Melt segregation and strain partitioning: implications for seismic anisotropy and mantle flow., Science, 301, 1227-1230, 2003.
(8) Hiraga, T., Nishikawa, O., Nagase, T., Akizuki, M. and Kohlstedt, D.L., Interfacial energies for quartz and albite in pelitic schists., Contributions to Mineralogy and Petrology, 143, 664-672, 2002.
(7) Mei, S., Bai, W., Hiraga, T. and Kohlstedt, D.L. , Influence of melt on the creep behavior of olivine-basalt aggregates under hydrous conditions., Earth Planet. Sci. Lett., 201, 491-507, 2002.
(6) Hiraga, T., Anderson, I.M., Zimmerman, M.E., Mei, S. and Kohlstedt, D.L. , Structure and chemistry of grain boundaries in deformed, olivine + basalt and partially molten lherzolite aggregates: Evidence of melt-free grain boundaries. , Contributions to Mineralogy Petrology, 144, 163-175, 2002.
(5) Hiraga, T., Nishikawa, O., Nagase, T. and Akizuki, M. , Morphology of intergranular pores and wetting angles in pelitic schists studied by transmission electron microscopy, Contributions to Mineralogy and Petrology, 141, 613-622, 2001.
(4) 平賀岳彦, 高分解能電子顕微鏡で見た岩石の粒界構造, 日本結晶学会誌, 43, 264, 2001.
(3) Masuda, T., Hiraga, T., Ikei, H., Kanda, H., Kugimiya, Y. and Akizuki, M. , Plastic deformation of quartz at room temperature: a Vickers nano-indentation test. , Geophys. Res. Lett., 27, 2773-2776, 2000.
(2) Hiraga, T., Nagase, T. and Akizuki, M., The structure of grain boundaries in granite-origin ultramylonite studied by high-resolution electron microscopy., Physics and Chemistry of Minerals, 26, 617-623, 1999.
(1) 平賀岳彦, 鉱物粒界の直視, 地学雑誌, 108, 110-121, 1999.

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