SAKAI, Takeshi

Faculty
Geodynamics Research Center
PositionAssistant Professor
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Birthday
Last Updated :2018/09/12

Researcher Profile and Settings

Association Memberships

  • American Geophysical Union (AGU)
  • THE JAPANESE SOCIETY FOR PLANETARY SCIENCES
  • Japan Association of Mineralogical Sciences
  • THE JAPAN SOCIETY OF HIGH PRESSURE SCIENCE AND TECHNOLOGY
  • JAPAN GEOSCIENCE UNION

Research Activities

Research Areas

  • Earth and planetary science, Solid earth and planetary physics

Research Interests

    Equation of state, Diamond anvil cel, High pressure Earth Science

Published Papers

  • Intermediate-depth earthquakes linked to localized heating in dunite and harzburgite
    Ohuchi Tomohiro, Lei Xinglin, Ohfuji Hiroaki, Higo Yuji, Tange Yoshinori, Sakai Takeshi, Fujino Kiyoshi, Irifune Tetsuo, NATURE GEOSCIENCE, 10, (10) 771 - +, 10 , DOI
  • Experimental and theoretical thermal equations of state of MgSiO3 post-perovskite at multi-megabar pressures
    Sakai Takeshi, Dekura Haruhiko, Hirao Naohisa, SCIENTIFIC REPORTS, 6, 03 07 , DOI
  • High-pressure generation using double stage micro-paired diamond anvils shaped by focused ion beam
    Sakai Takeshi, Yagi Takehiko, Ohfuji Hiroaki, Irifune Tetsuo, Ohishi Yasuo, Hirao Naohisa, Suzuki Yuya, Kuroda Yasushi, Asakawa Takayuki, Kanemura Takashi, REVIEW OF SCIENTIFIC INSTRUMENTS, 86, (3) , 03 , DOI
  • Stability of a hydrous delta-phase, AlOOH-MgSiO2(OH)(2), and a mechanism for water transport into the base of lower mantle
    Ohira Itaru, Ohtani Eiji, Sakai Takeshi, Miyahara Masaaki, Hirao Naohisa, Ohishi Yasuo, Nishijima Masahiko, EARTH AND PLANETARY SCIENCE LETTERS, 401, 12 - 17, 09 01 , DOI
  • The spin state of iron in Fe3+-bearing Mg-perovskite and its crystal chemistry at high pressure
    Mashino Izumi, Ohtani Eiji, Hirao Naohisa, Mitsui Takaya, Masuda Ryo, Seto Makoto, Sakai Takeshi, Takahashi Suguru, Nakano Satoshi, AMERICAN MINERALOGIST, 99, (8/9) 1555 - 1561, 08 , DOI
  • Discovery of coesite and stishovite in eucrite
    Miyahara Masaaki, Ohtani Eiji, Yamaguchi Akira, Ozawa Shin, Sakai Takeshi, Hirao Naohisa, PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 111, (30) 10939 - 10942, 07 29 , DOI
  • Equation of state of pure iron and Fe0.9Ni0.1 alloy up to 3 Mbar
    Sakai Takeshi, Takahashi Suguru, Nishitani Naoya, Mashino Izumi, Ohtani Eiji, Hirao Naohisa, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 228, 114 - 126, 03 , DOI
  • Equation of state of Fe3S at room temperature up to 2 megabars
    Kamada Seiji, Ohtani Eiji, Terasaki Hidenori, Sakai Takeshi, Takahashi Suguru, Hirao Naohisa, Ohishi Yasuo, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 228, 106 - 113, 03 , DOI
  • The sound velocity measurements of Fe3S
    Kamada Seiji, Ohtani Eiji, Fukui Hiroshi, Sakai Takeshi, Terasaki Hidenori, Takahashi Suguru, Shibazaki Yuki, Tsutsui Satoshi, Baron Alfred Q. R., Hirao Naohisa, Ohishi Yasuo, AMERICAN MINERALOGIST, 99, (1) 98 - 101, 01 , DOI
  • A compact system for generating extreme pressures and temperatures: An application of laser-heated diamond anvil cell to inelastic X-ray scattering
    Fukui Hiroshi, Sakai Takeshi, Sakamaki Tatsuya, Kamada Seiji, Takahashi Suguru, Ohtani Eiji, Baron Alfred Q. R., REVIEW OF SCIENTIFIC INSTRUMENTS, 84, (11) , 11 , DOI
  • Sound velocity of hexagonal close-packed iron up to core pressures
    Ohtani Eiji, Shibazaki Yuki, Sakai Takeshi, Mibe Kenji, Fukui Hiroshi, Kamada Seiji, Sakamaki Tatsuya, Seto Yusuke, Tsutsui Satoshi, Baron Alfred Q. R., GEOPHYSICAL RESEARCH LETTERS, 40, (19) 5089 - 5094, 10 16 , DOI
  • Jadeite formation in shocked ordinary chondrites
    Miyahara Masaaki, Ozawa Shin, Ohtani Eiji, Kimura Makoto, Kubo Tomoaki, Sakai Takeshi, Nagase Toshiro, Nishijima Masahiko, Hirao Naohisa, EARTH AND PLANETARY SCIENCE LETTERS, 373, 102 - 108, 07 01 , DOI
  • Discovery of seifertite in a shocked lunar meteorite
    Miyahara Masaaki, Kaneko Shohei, Ohtani Eiji, Sakai Takeshi, Nagase Toshiro, Kayama Masahiro, Nishido Hirotsugu, Hirao Naohisa, NATURE COMMUNICATIONS, 4, 04 , DOI
  • Melting relationships in the Fe-Fe3S system up to the outer core conditions
    Kamada Seiji, Ohtani Eiji, Terasaki Hidenori, Sakai Takeshi, Miyahara Masaaki, Ohishi Yasuo, Hirao Naohisa, EARTH AND PLANETARY SCIENCE LETTERS, 359-360, 26 - 33, 12 15 , DOI
  • Stability of Fe-Ni hydride after the reaction between Fe-Ni alloy and hydrous phase (delta-AlOOH) up to 1.2 Mbar: Possibility of H contribution to the core density deficit
    Terasaki Hidenori, Ohtani Eiji, Sakai Takeshi, Kamada Seiji, Asanuma Hidetoshi, Shibazaki Yuki, Hirao Naohisa, Sata Nagayoshi, Ohishi Yasuo, Sakamaki Tatsuya, Suzuki Akio, Funakoshi Ken-ichi, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 194-195, 18 - 24, 03 , DOI
  • Compression of Fe88.1Ni9.1S2.8 alloy up to the pressure of Earth's inner core
    Sakai Takeshi, Ohtani Eiji, Kamada Seiji, Terasaki Hidenori, Hirao Naohisa, JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 117, (B2) 2210 - 2210, 02 21 , DOI
  • Sound velocity measurements in dhcp-FeH up to 70 GPa with inelastic X-ray scattering: Implications for the composition of the Earth's core
    Shibazaki Yuki, Ohtani Eiji, Fukui Hiroshi, Sakai Takeshi, Kamada Seiji, Ishikawa Daisuke, Tsutsui Satoshi, Baron Alfred Q. R., Nishitani Naoya, Hirao Naohisa, Takemura Kenichi, EARTH AND PLANETARY SCIENCE LETTERS, 313-314, 79 - 85, 01 01 , DOI
  • Static compression of Fe0.83Ni0.09Si0.08 alloy to 374 GPa and Fe0.93Si0.07 alloy to 252 GPa: Implications for the Earth's inner core
    Asanuma Hidetoshi, Ohtani Eiji, Sakai Takeshi, Terasaki Hidenori, Kamada Seiji, Hirao Naohisa, Ohishi Yasuo, EARTH AND PLANETARY SCIENCE LETTERS, 310, (1-2) 113 - 118, 10 01 , DOI
  • Phase stability and compression study of (Fe-0.89,Ni-0.11)(3)S up to pressure of the Earth's core
    Sakai Takeshi, Ohtani Eiji, Terasaki Hidenori, Kamada Seiji, Hirao Naohisa, Miyahara Masaaki, Nishijima Masahiko, AMERICAN MINERALOGIST, 96, (10) 1490 - 1494, 10 , DOI
  • Stability field of the hcp-structure for Fe, Fe-Ni, and Fe-Ni-Si alloys up to 3 Mbar
    Sakai Takeshi, Ohtani Eiji, Hirao Naohisa, Ohishi Yasuo, GEOPHYSICAL RESEARCH LETTERS, 38, (9) 1 - 5, 05 03 , DOI
  • Equation of state of the NaCl-B2 phase up to 304 GPa
    Sakai Takeshi, Ohtani Eiji, Hirao Naohisa, Ohishi Yasuo, JOURNAL OF APPLIED PHYSICS, 109, (8) , 04 15 , DOI
  • Natural dissociation of olivine to (Mg,Fe)SiO3 perovskite and magnesiowustite in a shocked Martian meteorite
    Miyahara Masaaki, Ohtani Eiji, Ozawa Shin, Kimura Makoto, El Goresy Ahmed, Sakai Takeshi, Nagase Toshiro, Hiraga Kenji, Hirao Naohisa, Ohishi Yasuo, PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 108, (15) 5999 - 6003, 04 12 , DOI
  • Fe-Mg partitioning between post-perovskite and ferropericlase in the lowermost mantle
    Sakai Takeshi, Ohtani Eiji, Terasaki Hidenori, Miyahara Masaaki, Nishijima Masahiko, Hirao Naohisa, Ohishi Yasuo, Sata Nagayoshi, PHYSICS AND CHEMISTRY OF MINERALS, 37, (7) 487 - 496, 07 , DOI
  • Melting of iron-silicon alloy up to the core-mantle boundary pressure: implications to the thermal structure of the Earth's core
    Asanuma Hidetoshi, Ohtani Eiji, Sakai Takeshi, Terasaki Hidenori, Kamada Seiji, Kondo Tadashi, Kikegawa Takumi, PHYSICS AND CHEMISTRY OF MINERALS, 37, (6) 353 - 359, 06 , DOI
  • Phase relationships of the Fe-FeS system in conditions up to the Earth's outer core
    Kamada Seiji, Terasaki Hidenori, Ohtani Eiji, Sakai Takeshi, Kikegawa Takumi, Ohishi Yasuo, Hirao Naohisa, Sata Nagayoshi, Kondo Tadashi, EARTH AND PLANETARY SCIENCE LETTERS, 294, (1-2) 94 - 100, 05 15 , DOI
  • Partitioning of oxygen between the Earth's mantle and core
    Frost Daniel J., Asahara Yuki, Rubie David C., Miyajima Nobuyoshi, Dubrovinsky Leonid S., Holzapfel Christian, Ohtani Eiji, Miyahara Masaaki, Sakai Takeshi, JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 115, (B2) , 02 10 , DOI
  • Fe-Mg partitioning between perovskite and ferropericlase in the lower mantle
    Sakai Takeshi, Ohtani Eiji, Terasaki Hidenori, Sawada Naoki, Kobayashi Yusuke, Miyahara Masaaki, Nishijima Masahiko, Hirao Naohisa, Ohishi Yasuo, Kikegawa Takumi, AMERICAN MINERALOGIST, 94, (7) 921 - 925, 07 , DOI
  • Hydrogen incorporation to the Earth's core
    Terasaki Hidenori, Ohtani Eiji, Sakai Takeshi, Kamada Seiji, Shibazaki Yuki, Asanuma Hidetoshi, Naohisa Hirao, Ohishi Yasuo, Sata Nagayoshi, Sakamaki Tatsuya, Suzuki Akio, Funakoshi Ken-ichi, GEOCHIMICA ET COSMOCHIMICA ACTA, 73, (13) , 06
  • Recent advances in the study of mantle phase transitions
    Ohtani Eiji, Sakai Takeshi, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 170, (3-4) 240 - 247, 11 , DOI
  • Phase relations of Fe-Si alloy up to core conditions: Implications for the Earth inner core
    Asanuma Hidetoshi, Ohtani Eiji, Sakai Takeshi, Terasaki Hidenori, Kamada Seiji, Hirao Naohisa, Sata Nagayoshi, Ohishi Yasuo, GEOPHYSICAL RESEARCH LETTERS, 35, (12) , 06 25 , DOI
  • Application of FIB system to ultra-high-pressure Earth science
    Miyahara Masaaki, Sakai Takeshi, Ohtani Eiji, Kobayashi Yusuke, Kamada Seiji, Kondo Tadashi, Nagase Toshiro, Yoo Jung Ho, Nishijima Masahiko, Vashaei Zahra, JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES, 103, (2) 88 - 93, 04 , DOI
  • Aluminous hydrous mineral delta-AlOOH as a carrier of hydrogen into the core-mantle boundary
    Sano Asami, Ohtani Eiji, Kondo Tadashi, Hirao Naohisa, Sakai Takeshi, Sata Nagayoshi, Ohishi Yasuo, Kikegawa Takumi, GEOPHYSICAL RESEARCH LETTERS, 35, (3) , 02 02 , DOI
  • Hollandite II phase in KAlSi(3)O(8) as a potential host mineral of potassium in the Earth's lower mantle
    Hirao Naohisa, Ohtani Eiji, Kondo Tadashi, Sakai Takeshi, Kikegawa Takumi, PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 166, (1-2) 97 - 104, 01 , DOI
  • Interaction between iron and post-perovskite at core-mantle boundary and core signature in plume source region
    Sakai Takeshi, Kondo Tadashi, Ohtani Eiji, Terasaki Hidenori, Endo Noriaki, Kuba Toshiko, Suzuki Toshiaki, Kikegawa Takumi, GEOPHYSICAL RESEARCH LETTERS, 33, (15) 15317 - 15317, 08 11 , DOI

Misc

Awards & Honors

  •   2017 09 , Japan Association of Mineralogical Sciences, JAMS Award for Young Scientists


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