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

平賀研

(42)Yabe K, Koizumi S, Hiraga T (2023) Diffusion creep characteristics of anorthite revealed by uniaxial and pure shear deformation experiments. Journal of Geophysical Research: Solid Earth, e2022JB024752.
(41)Okamoto A, Hiraga T (2022) A common diffusional mechanism for creep and grain growth in polymineralic rocks: Experiments. Journal of Geophysical Research: Solid Earth, e2022JB024638.
(40)Kim N, Ando A, Yabe K, Hiraga T (2022) Olivine morphology and fabric during diffusion creep: Pure shear experiments. Journal of Geophysical Research: Solid Earth, e2021JB023613
(39)Ghosh S, Koizumi S, Hiraga T (2021) Diffusion creep of diopside, Journal of Geophysical Research: Solid Earth, DOI: 10.1029/2020JB01985
(38) Goto A, Fukui K, Hiraga T, Nishida Y, Ishibashi H, Matsushima T, Miyamoto T, Sasaki O (2020) Rigid migration of Unzen lava rather than flow. Journal of Volcanology and Geothermal Research, 407, 107073.
(37) Yabe K, Hiraga T(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) Yabe K, Sueyoshi K, Hiraga T (2020) Grain boundary diffusion creep of olivine: 1. Experiments at 1 atm. Journal of Geophysical Research: Solid Earth.
(35) Koizumi S, Hiraga T, Suzuki TS (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 (2017) 岩石 vs ファインセラミックス, 地質学雑誌, 123, 379-390
(29) Koizumi S, Suzuki TS, 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, Michibayashi K (2014) 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, Hiraga T (2013) 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.
(26) Tasaka M, Hiraga T, Zimmerman ME (2013) 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.
(25) Hiraga T, Miyazaki T, Yoshida H, Zimmerman ME (2013) Comparison of microstructures in superplastically deformed synthetic materials and natural mylonites: Mineral aggregation via grain boundary sliding, Geology, 41, 9, 959-962.
(24) Miyazaki T, Sueyosh K, Hiraga T (2012) 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 (2012) 粒間流体の実態, 地球化学, 46, 231-242.
(22) McCarthy C, Takei Y, Hiraga T (2011) 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.
(21) Hiraga T, Tachibana C, Ohashi N, Sano S (2010) Grain growth systematics for forsterite ± enstatite aggregates: effect of lithology on grain size in the upper mantle, Earth Planet. Sci. Lett., 291, 10-20.
(20) Koizumi S, Hiraga T, Tachibana C,Tasaka M, Miyazaki T, Kobayashi T, Takamasa A, Ohashi N, Sano S (2010) 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.
(19) Hiraga T, Miyazaki T, Tasaka M, Yoshida H (2010) Mantle superplasticity and its self-made demise, Nature, 468, 1091-1095.
(18) Hiraga T, Kohlstedt DL (2009) Systematic distribution of incompatible elements in mantle peridotite: Importance of intra- and inter-granular melt-like components, Contrib. Mineral. Petrol., 158, 149-167.
(17) Goergen E, Whitney DL, Zimmerman ME and Hiraga T (2008) Deformation-induced polymorphic transformation: experimental deformation of kyanite, andalusite, and sillimanite, Tectonophysics, 454, 23-35.
(16) Hiraga T, Hirschmann MM and Kohlstedt DL (2007) Equilibrium interface segregation in the diopside-forsterite system II: Applications of interface enrichment to mantle geochemistry. , Geochimica et Cosmochimica Acta, 71, 1281-1289.
(15) Hiraga T, Kohlstedt DL (2007) Equilibrium interface segregation in the diopside-forsterite system I: Analytical techniques, thermodynamics, and segregation characteristics, Geochimica et Cosmochimica Acta, 71, 1266-1280.
(14) Jung H, Katayama I, Jiang Z, Hiraga T and Karato S (2006) Effect of water and stress on the lattice preferred orientation. , Tectonophysics, 421, 1-22.
(13)Chen S, Hiraga T and Kohlstedt DL (2006) Water weakening of clinopyroxene in the dislocation creep regime. , J. Geophys. Res., 111, B8, B08203.
(12) Hiraga T, Anderson IM and Kohlstedt DL (2004) Grain boundaries as reservoirs of incompatible elements in the Earth's mantle. , Nature, 427, 699-703.
(11) Wang Z, Hiraga T and Kohlstedt DL (2004) Effect of hydrogen on Fe-Mg interdiffusion in olivine. , Applied Physics Letters, 85, 209-211.
(10)Hiraga T, Anderson IM and Kohlstedt DL (2003) Chemistry of grain boundaries in mantle rocks., American Mineralogist, 88, 1015-1019.
(9) Holtzman BK, Kohlstedt DL, Zimmerman ME, Heidelbach F, Hiraga T and HustoftJ (2003) Melt segregation and strain partitioning: implications for seismic anisotropy and mantle flow., Science, 301, 1227-1230.
(8) Hiraga T, Nishikawa O, Nagase T, Akizuki M and Kohlstedt DL (2002) Interfacial energies for quartz and albite in pelitic schists., Contributions to Mineralogy and Petrology, 143, 664-672.
(7) Mei S, Bai W, Hiraga T and Kohlstedt DL (2002) Influence of melt on the creep behavior of olivine-basalt aggregates under hydrous conditions., Earth Planet. Sci. Lett., 201, 491-507.
(6) Hiraga T, Anderson IM, Zimmerman ME, Mei S and Kohlstedt DL (2002) 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.
(5) Hiraga T, Nishikawa O, Nagase T and Akizuki M (2001) Morphology of intergranular pores and wetting angles in pelitic schists studied by transmission electron microscopy, Contributions to Mineralogy and Petrology, 141, 613-622.
(4) 平賀岳彦 (2001) 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.
(3) Masuda T, Hiraga T, Ikei H, Kanda H, Kugimiya Y and Akizuki M (2000) Plastic deformation of quartz at room temperature: a Vickers nano-indentation test. , Geophys. Res. Lett., 27, 2773-2776.
(2) Hiraga T, Nagase T and Akizuki M (1999) The structure of grain boundaries in granite-origin ultramylonite studied by high-resolution electron microscopy., Physics and Chemistry of Minerals, 26, 617-623.
(1) 平賀岳彦 (1999) 鉱物粒界の直視, 地学雑誌, 108, 110-121.

受賞等

2023年3月

D3のKim Nahyeonさんが、第171回超塑性研究会で優秀ポスター賞を受賞しました。

2022年5月

D3のKim Nahyeonさんが、日本地球惑星連合大会2022で学生優秀発表賞を受賞しました。

2021年9月

谷部功将特任研究員が、アメリカ地球物理学連合のMineral Physics SectionにおけるGraduate Research Awardを受賞しました。記事1, 記事2

2021年3月

D2のKim Nahyeonさんが、ICOTOM2021でBest poster awardを受賞しました。賞状

2018年6月

平賀さんが、JAFOE(日米先端工学)シンポジウムでBest Speakers Awardを受賞しました。賞状

2017年5月

D3年の末善健太君と谷部功将君が、日本地球惑星連合大会2017で学生優秀発表賞を受賞しました。
末善健太, 平賀岳彦: 金属メルトのマントルレオロジーに対する効果
谷部功将, 平賀岳彦: 転位が岩石非弾性に与える影響：アナログ物質を用いた実験的研究

2016年5月

M1年の岡本篤郎くんが、日本地球惑星連合大会2016で学生優秀発表賞を受賞しました。
岡本篤郎, 平賀岳彦: 金属メルトのマントルレオロジーに対する効果

2015年5月

D1の谷部功将君が、日本地球惑星科学連合大会2016で学生優秀発表賞を受賞しました。
谷部功将, 平賀岳彦: オリビン多結晶体の合成と高温クリープ実験

2014年9月

M2の丸山玄太君が、日本鉱物科学会2014年年会でポスター賞を受賞しました。丸山玄太, 平賀岳彦: 粒子回転の観察と定量化による拡散クリープ下でのフォルステライト結晶選択配向メカニズムの解明

2011年5月

D3の田阪 美樹さんが、日本地球惑星科学連合大会2011で学生優秀発表賞を受賞しました。田阪美樹, 平賀岳彦: 粒径依存型クリープにおける2相系のレオロジー