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西 真之ニシ マサユキ

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地球深部ダイナミクス研究センター
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Last Updated :2018/12/18

研究者基本情報

学歴

  •  - 2010年03月, 九州大学, 理学府, 地球惑星科学科博士後期課程修了

研究活動情報

研究分野

  • 固体地球惑星物理学

研究キーワード

    水, 高圧, 反応速度論, 高圧地球科学

論文

  • High-pressure phase transitions of anorthosite crust in the Earth's deep mantle
    Nishi Masayuki, Greaux Steeve, Tateno Shigehiko, Kuwayama Yasuhiro, Kawai Kenji, Trifune Tetsuo, Maruyama Shigenori, GEOSCIENCE FRONTIERS, 9, (6) 1859 - 1870,   2018年11月
  • Thermal equation of state of MgSiO4H2 phase H determined by in situ X-ray diffraction and a multianvil apparatus
    Masayuki Nishi, Masayuki Nishi, Jun Tsuchiya, Jun Tsuchiya, Takeshi Arimoto, Sho Kakizawa, Takehiro Kunimoto, Yoshinori Tange, Yuji Higo, Tetsuo Irifune, Tetsuo Irifune, Physics and Chemistry of Minerals, 1 - 7,   2018年06月09日
  • High-pressure phase relation of KREEP basalts: A clue for finding the lost Hadean crust?
    Greaux Steeve, Nishi Masayuki, Tateno Shigehiko, Kuwayama Yasuhiro, Hirao Naohisa, Kawai Kenji, Maruyama Shigenori, Irifune Tetsuo, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 274, 184 - 194,   2018年01月
  • The pyrite-type high-pressure form of FeOOH
    Nishi Masayuki, Kuwayama Yasuhiro, Tsuchiya Jun, Tsuchiya Taku, NATURE, 547, (7662) 205 - 208,   2017年07月
  • Phase Relations in the System MgSiO3-Al2O3up to 2300 K at Lower Mantle Pressures
    Zhaodong Liu, Zhaodong Liu, Masayuki Nishi, Takayuki Ishii, Hongzhan Fei, Nobuyoshi Miyajima, Tiziana Boffa Ballaran, Hiroaki Ohfuji, Takeshi Sakai, Lin Wang, Svyatoslav Shcheka, Takeshi Arimoto, Yoshinori Tange, Yuji Higo, Tetsuo Irifune, Tomoo Katsura, Journal of Geophysical Research: Solid Earth,   2017年01月01日
  • Melting temperatures of MgO under high pressure by micro-texture analysis
    Kimura T., Ohfuji H., Nishi M., Irifune T., NATURE COMMUNICATIONS, 15735,   2017年06月
  • Phase relations in the system MgSiO3-Al2O3 up to 52 GPa and 2000 K
    Liu Zhaodong, Irifune Tetsuo, Nishi Masayuki, Tange Yoshinori, Arimoto Takeshi, Shinmei Toru, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 257, 18 - 27,   2016年08月
  • Growth kinetics of forsterite reaction rims at high-pressure
    Nishihara Yu, Maruyama Genta, Nishi Masayuki, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 257, 220 - 229,   2016年08月
  • Phase transitions of serpentine in the lower mantle
    Nishi M., Irifune T., Greaux S., Tange Y., Higo Y., PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 245, 52 - 58,   2015年08月
  • Partition of Al between Phase D and Phase H at high pressure: Results from a simultaneous structure refinement of the two phases coexisting in a unique grain
    Bindi Luca, Nishi Masayuki, Irifune Tetsuo, AMERICAN MINERALOGIST, 100, (7) 1637 - 1640,   2015年07月
  • Crystal chemistry of dense hydrous magnesium silicates: The structure of phase H, MgSiH2O4, synthesized at 45 GPa and 1000 degrees C
    Bindi Luca, Nishi Masayuki, Tsuchiya Jun, Irifune Tetsuo, AMERICAN MINERALOGIST, 99, (8-9) 1802 - 1805,   2014年08月
  • In situ observation of crystallographic preferred orientation of deforming olivine at high pressure and high temperature
    Ohuchi Tomohiro, Nishihara Yu, Seto Yusuke, Kawazoe Takaaki, Nishi Masayuki, Maruyama Genta, Hashimoto Mika, Higo Yuji, Funakoshi Ken-ichi, Suzuki Akio, Kikegawa Takumi, Irifune Tetsuo, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 243, 1 - 21,   2015年06月
  • Stability of hydrous silicate at high pressures and water transport to the deep lower mantle
    Nishi M., Irifune T., Tsuchiya J., Tange Y., Nishihara Y., Fujino K., Higo Y., NATURE GEOSCIENCE, 7, (3) 224 - 227,   2014年03月
  • Effects of pressure and temperature on the silicon diffusivity of pyrope-rich garnet
    Shimojuku Akira, Kubo Tomoaki, Kato Takumi, Yoshino Takashi, Nishi Masayuki, Nakamura Tomoki, Okazaki Ryuji, Kakazu Yuki, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 226, 28 - 38,   2014年01月
  • Growth kinetics of MgSiO3 perovskite reaction rim between stishovite and periclase up to 50 GPa and its implication for grain boundary diffusivity in the lower mantle
    Nishi Masayuki, Nishihara Yu, Irifune Tetsuo, EARTH AND PLANETARY SCIENCE LETTERS, 377, 191 - 198,   2013年09月
  • Slow Si-Al interdiffusion in garnet and stagnation of subducting slabs
    Nishi Masayuki, Kubo Tomoaki, Ohfuji Hiroaki, Kato Takumi, Nishihara Yu, Irifune Tetsuo, EARTH AND PLANETARY SCIENCE LETTERS, 361, 44 - 49,   2013年01月01日
  • Intracrystalline nucleation during the post-garnet transformation under large overpressure conditions in deep subducting slabs
    Nishi Masayuki, Irifune Tetsuo, Ohfuji Hiroaki, Tange Yoshinori, GEOPHYSICAL RESEARCH LETTERS, 39,   2012年12月05日
  • Exsolution kinetics of majoritic garnet from clinopyroxene in subducting oceanic crust
    Nishi Masayuki, Kubo Tomoaki, Kato Takumi, Tominaga Aiko, Funakoshi Ken-ichi, Higo Yuji, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 189, (1-2) 47 - 55,   2011年11月
  • Effect of iron content on electrical conductivity of ferropericlase with implications for the spin transition pressure
    Yoshino Takashi, Ito Eiji, Katsura Tomoo, Yamazaki Daisuke, Shan Shuanming, Guo Xinzhuan, Nishi Masayuki, Higo Yuji, Funakoshi Ken-ichi, JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 116,   2011年04月05日
  • Survival of majoritic garnet in diamond by direct kimberlite ascent from deep mantle
    Nishi Masayuki, Kubo Tomoaki, Kato Takumi, Tominaga Aiko, Shimojuku Akira, Doi Naoko, Funakoshi Ken-ichi, Higo Yuji, GEOPHYSICAL RESEARCH LETTERS, 37,   2010年05月13日
  • Plagioclase breakdown as an indicator for shock conditions of meteorites
    Tomoaki Kubo, Makoto Kimura, Takumi Kato, Masayuki Nishi, Aiko Tominaga, Takumi Kikegawa, Ken Ichi Funakoshi, Nature Geoscience, 3, 41 - 45,   2010年01月01日
  • Metastable transformations of eclogite to garnetite in subducting oceanic crust
    Nishi Masayuki, Kubo Tomoaki, Kato Takumi, JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES, 104, (3) 192 - 198,   2009年06月
  • Electrical conductivity of majorite garnet and its implications for electrical structure in the mantle transition zone
    Yoshino Takashi, Nishi Masayuki, Matsuzaki Takuya, Yamazaki Daisuke, Katsura Tomoo, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 170, (3-4) 193 - 200,   2008年11月
  • Survival of pyropic garnet in subducting plates
    Nishi Masayuki, Kato Takumi, Kubo Tomoaki, Kikegawa Takumi, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 170, (3-4) 274 - 280,   2008年11月

MISC

  • Deep water cycle: Mantle hydration
    Masayuki Nishi, Nature Geoscience, 8,   2015年01月11日
  • Letter. Partition of Al between Phase D and Phase H at high pressure: Results from a simultaneous structure refinement of the two phases coexisting in a unique grain
    Luca Bindi, Luca Bindi, Masayuki Nishi, Masayuki Nishi, Tetsuo Irifune, Tetsuo Irifune, American Mineralogist, 100,   2015年01月01日, The crystal structure of the two dense hydrous magnesium silicates Phase D, MgSi2H2O6, and Phase H, MgSiH2O4, synthesized at 45 GPa and 1000 °C and coexisting in the same micrometer-sized grain, was investigated by single-crystal Xâ€.
  • マントル遷移層の非平衡鉱物構成
    西 真之, 高圧力の科学と技術, 24, (2) 136 - 144,   2014年01月01日, Untransformed metastable minerals exist under the low-temperature conditions of the subducting plates. Here I report the experimental studies on the transformation kinetics of pyroxene and garnet at high-pressure and hightemperature conditions. Slow kinetics of the pyroxene-garnet transformation due to the low atomic diffusion rate indicates that large low-density metastable regions would exist in the slab, greatly contributing to the slab stagnation around the mantle transition region.
  • 下部マントル条件下での拡散律速反応帯成長と非平衡相転移
    西 真之, 高圧力の科学と技術, 25, (2) 172 - 180,   2015年01月01日, © 2015 Japan Society of High Pressure Science and Technology. All rights reserved. Atomic diffusion rates and transformation mechanims of mantle minelars provide important constraints for understanding many physical and chemical processes in the Earth's interior, including mantle rheology and chemical transportation. Here I introduce two recent experimental studies on the atomic diŠusivity and transformation mechanisms of mantle minerals under lower mantle conditions up to 50 GPa using a Kawai-type high-pressure apparatus combined with sintered diamond anvils. DiŠusion-controlled growth kinetics of the polycrystalline MgSiO3 bridgmanite enabled us to estimate the grain boundary diŠusivity of bridgmanite in the lower mantle. Also, metastability of the deep subducted plate was disscussed based on the mechanism changes through the post-garnet transformation under large over pressure conditions.
  • Transportation of water into the deep lower mantle by new type of dense hydrous magnesium silicate
    NISHI Masayuki, SPring-8 Research Frontiers 2014,   2015年
  • Back transformation kinetics of majoritic garnet and implication for ascending rate of diamond
    NISHI Masayuki, SPring-8 Research Frontiers 2010,   2011年

受賞

  •   2014年11月, 日本高圧力学会, 奨励賞
  •   2011年09月, 日本鉱物学科学会, 論文賞

競争的資金



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