JAMSTEC Researchers Database

  • Keishi Okazaki
  • Keishi Okazaki
Department
Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star)　Kochi Institute for Core Sample Research (KOCHI)　Geomaterials Science Research Group
Career
Visiting Senior Researcher

Profile

Speciality
Experimental rock deformation
Working place
Kochi Institute for Core Sample Research　Otsu 200, Monobe, Nankoku-shi, Kochi, Japan
Society
American Geophysical Union, Japan Geoscience Union, Geological Society of Japan
ＨＰ
https://sites.google.com/view/keishiokazaki-jamstec/home

Research Achievement

Peer reviewed publications (Belonging to JAMSTEC)

  • Peter B. Kelemen , Juan Carlos de Obeso , James A. Leong , Marguerite Godard , Keishi Okazaki , Alissa J. Kotowski , Craig E. Manning , Eric T. Ellison , Manuel D. Menzel , Janos L. Urai , Greg Hirth , Matthew Rioux , Daniel F. Stockli , Romain Lafay , Andreas M. Beinlich , Jude A. Coggon , Nehal H. Warsi , Jurg M. Matter , Damon A.H. Teagle , Michelle Harris , Katsuyoshi Michibayashi , Eiichi Takazawa , Zaher Al Sulaimani. Listvenite Formation During Mass Transfer into the Leading Edge of the Mantle Wedge: Initial Results from Oman Drilling Project Hole BT1B. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2022, 127, doi: 10.1029/2021JB022352
  • K. Okazaki, K. Michibayashi, K. Hatakeyama, N. Abe, K. Johnson, P. Kelemen. Major Mineral Fraction and Physical Properties of Carbonated Peridotite (Listvenite) From ICDP Oman Drilling Project Hole BT1B Inferred From X-Ray CT Core Images. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2021, 126, p. e2021JB022719, doi: 10.1029/2021JB022719
  • Hatakeyama, K., Katayama, I., Abe, N., Okazaki, K., Michibayashi, K., and the Oman Drilling Project Science Party. Effects of Alteration and Cracks on the Seismic Velocity Structure of Oceanic Lithosphere Inferred From Ultrasonic Measurements of Mafic and Ultramafic Samples Collected by the Oman Drilling Project. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2021, 126, doi: 10.1029/2021JB021923
  • 谷川亘、村山雅史、井尻暁、 廣瀬丈洋、 浦本豪一郎、 星野辰彦、 田中幸記、 山本裕二、 濱田洋平、 岡崎啓史、 徳山英一. 南海地震水没災害伝承の痕跡発掘に向けた沿岸域海底調査：須崎市野見湾を例に. 沿岸海洋研究, 2021, 59, 1, p. 21-31, doi: 10.32142/engankaiyo.2021.4.001
  • Keishi Okazaki, Eric Burdette, Greg Hirth. Rheology of the Fluid Oversaturated Fault Zones at the Brittle-Plastic Transition. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2021, 126, 2, doi: 10.1029/2020JB020804
  • 長瀬薫平、片山郁夫、畠山航平、赤松祐哉、岡崎啓史、阿部なつ江、道林克禎、横山正. オマーンオフィオライト陸上掘削試料を用いたハードロック掘削における空隙率測定法の再検討. 地質学雑誌, 2020, 126, 12, p. 713-717, doi: 10.5575/geosoc.2020.0043
  • Ikuo Katayama, Natsue Abe, Kohei Hatakeyama, Yuya Akamatsu, Keishi Okazaki, Ole Ivar Ulven, Gilbert Hong, Wenlu Zhu, Benoit Cordonnier, Katsuyoshi Michibayashi, Marguerite Godard, Peter Kelemen. Permeability Profiles Across the Crust-Mantle Sections in the Oman Drilling Project Inferred From Dry and Wet Resistivity Data. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2020, 125, p. 1-9, doi: 10.1029/2019JB018698
  • Keishi Okazaki, Greg Hirth. Deformation of mafic schists from subducted oceanic crust at high pressure and temperature conditions. TECTONOPHYSICS, 2019, 774, 5, doi: 10.1016/j.tecto.2019.228217
  • Melodie E French, Greg Hirth, Keishi Okazaki. Fracture-induced pore fluid pressure weakening and dehydration of serpentinite. TECTONOPHYSICS, 2019, 767, doi: 10.1016/j.tecto.2019.228168
  • Makoto Otsubo, Ayumu Miyakawa, Ikuo Katayama, Keishi Okazaki. An inhomogeneous across-slab conduit controlled by intraslab stress heterogeneity in the Nankai subduction zone. Scientific Reports, 2019, 9, doi: 10.1038/s41598-018-38142-w
  • PB Kelemen, R Aines, E Bennett, SM Benson, E Carter, JA Coggon, JC de Obeso, O Evans, G Gadikota, GM Dipple, M Godard, M Harris, JA Higgins, KTM Johnson, F Kourim, R Lafay, S Lambart, CE Manning, JM Matter, K Michibayashi, T Morishita, J Noel, K Okazaki, P Renforth, B Robinson, H Savage, R Skarbek, MW Spiegelman, E Takazawa, D Teagle, JL Urai, J Wilcox. In situ carbon mineralization in ultramafic rocks: Natural processes and possible engineered methods. Energy Procedia, 2018, 146, p. 92-102, doi: 10.1016/j.egypro.2018.07.013

Non-peer reviewed publications (Belonging to JAMSTEC)

  • Kelemen, P.B., Matter J.M., Teagle, D.A.H., Coggon, J.A., and the Oman Drilling Project Science Team. Oman Drilling Project: Scientific Drilling in the Samail Ophiolite, Sultanate of Oman. Proceedings of the Oman Drilling Program/International Ocean Discovery Program, 2020, doi: 10.14379/OmanDP.proc.2020

Invited oral presentation(Belonging to JAMSTEC)

  • 黒澤 耕介、玄田 英典、東 真太郎、岡崎 啓史、大野 遼、新原 隆史、三河内 岳、富岡 尚敬、境家 達弘、近藤 忠、鹿山 雅裕、小池 みずほ、佐野 有司、松崎 琢也、村山 雅史、佐竹 渉、松井 孝典. 炭酸塩岩の高歪速度変形時の挙動. JpGU2021　/　SCG46-12, 2021
  • 岡崎 啓史、武藤 潤. 排水条件下における高温高封圧高間隙水圧岩石変形実験の予察的結果. JpGU2021 / SCG46-06, 2021
  • Keishi Okazaki, Katsuyoshi Michibayashi, Kohei Hatakeyama, Natsue Abe, Kevin T.M. Johnson, Peter B Kelemen, Oman Drilling Project Phase I Science Party. Major mineral mode of listvenite from ICDP Oman Drilling Project Hole BT1B inferred from X-ray CT core images. JpGU-AGU Joint Meeting 2020, 2020
  • Kosuke Kurosawa, Hidenori Genda, Shintaro Azuma, Keishi Okazaki. An overlooked heat source in impact events and its effect on the degree of devolatilization of natural calcite carbonates. JpGU-AGU Joint Meeting 2020, 2020
  • Peter B Kelemen、Juan de Obeso、Craig Manning、Marguerite Godard、Wolfgang Bach、Merry Yue Cai、Saebyul Choe、Judith Coggon、Eric Ellison、Alireza Eslami、Katy Evans、Michelle Harris、Wolf-Achim Kah、Jürg Matter、Katsu Michibayashi、Keichi Okazaki、Philippe Pézard、Damon A.H. Teagle、Alexis Templeton、Oman Drilling Project Science Team. Peridotite alteration in OmanDP cores. 日本地球惑星科学連合2019年大会, 2019
  • Keishi Okazaki. Experimental investigation of dehydration weakening and embrittlement of hydrous minerals. Intermediate and Deep Earthquakes: Observation and Modeling /College de France, 2018
  • Peter B Kelemen, JC deObeso, M Godard, KTM Johnson, K Okazaki, CE Manning, JL Urai,K Michibayashi, M Harris, J Coggon, J Matter, E Takazawa10, DAH Teagle, Oman Drilling Project Phase I Science Party. Peridotite carbonation at the leading edge of the mantle wedge: OmanDP Site BT1. JpGU 2018[SCG54-12], 2018
  • Greg Hirth, Keishi Okazaki, Brooks Proctor. The Role of Fluid Distribution on Fault Strength at Deformation Conditions near the Brittle-Plastic Transition. AGU fallmeeting 2017, 2017, p. T52C-04
  • 岡崎 啓史、Hirth Greg. Deformation experiment on quartz aggregates with high water contents at high pressure and temperature. JpGU-AGU2017 / SSS17-22, 2017

oral presentation(Belonging to JAMSTEC)

  • 岡崎 啓史、道林 克禎、畠山 航平、阿部 なつ江、Johnson Kevin、Kelemen Peter. Mineral mode of listvenite from ICDP Oman Drilling Project Hole BT1B inferred from X-ray CT core images. JpGU2021 / SCG41-04, 2021
  • Kohei Hatakeyama, Ikuo Katayama, Natsue Abe, Keishi Okazaki, Katsuyoshi Michibayashi, The Oman Drilling Project Science Party. Velocity gradient in the oceanic crust layer 3 based on seismic velocity of cores drilled from the Oman ophiolite. JpGU-AGU Joint Meeting 2020, 2020
  • Keishi Okazaki, Eric Burdette, Greg Hirth. Rheology of the fluid oversaturated simulated quartz shear zone at the brittle-ductile transition. JpGU-AGU Joint Meeting 2020, 2020
  • 野田 博之、岡崎 啓史. 剪断帯内の変形の幾何を考慮した脆性・塑性遷移域の断層構成則. JpGU-AGU Joint Meeting 2020, 2020
  • Satish C. Singh, Venkata Vaddineni, Vaibhav Ingale, Keishi Okazaki, The Oman Drilling Project Phase 2 Science Party. Mohorovicic Discontinuity: What we know, what we don't know, and what should be done?. International Conference on Ophiolites and the Oceanic Lithosphere: Results of the Oman Drilling Project and Related Research, 2020
  • Keishi Okazaki, Katsuyoshi Michibayashi, Kohei Hatakeyama, Natsue Abe, Kevin T.M. Johnson, Peter B. Kelemen, the Oman Drilling Project Phase I Science Part. Mineral assemblages of listvenite from ICDP Oman Drilling Project Hole BT1B inferred from X-ray CT core images. International Conference on Ophiolites and the Oceanic Lithosphere: Results of the Oman Drilling Project and Related Research, 2020
  • Peter B. Kelemen, Wolfgang Bach, Andreas Beinlich, Merry Cai, Saebyul Choe, Jude Coggon, Juan Carlos de Obeso, Eric Ellison, Alireza Eslami, Katy Evans, Marguerite Godard, Michelle Harris, Greg Hirth, Wolf Achim Kahl, Benjamin Malvoisin, Craig Manning, Jürg Matter, Katsu Michibayashi, Keishi Okazaki, Philippe Pezard, Damon Teagle, Alexis Templeton, Janos Urai, Wenlu Zhu, the Oman Drilling Project Science Team. Alteration of Peridotite in the Samail Ophiolite: Results from the Oman Drilling Project. International Conference on Ophiolites and the Oceanic Lithosphere: Results of the Oman Drilling Project and Related Research, 2020
  • Peter B. Kelemen, Wolfgang Bach, Andreas Beinlich, Juan Carlos de Obeso, Greg Hirth, Craig Manning, Katsu Michibayashi, Keishi Okazaki, Janos Urai, Wenlu Zhu, the Oman Drilling Project Science Team. Ductile deformation of listvenite, OmanDP Site BT1, Samail Ophiolite. International Conference on Ophiolites and the Oceanic Lithosphere: Results of the Oman Drilling Project and Related Research, 2020
  • Ikuo Katayama, Natsue Abe, Keishi Okazaki, Kohei Hatakeyama, Yuya Akamatsu, Katsuyoshi Michibayashi, Marguerite Godard, Peter Kelemen, The Oman Drilling Project Phase 2 Science Party. Crack density and aspect ratio of serpentinized dunites and harzburgites in the Hole BA1B, 3A, and 4A inferred from onboard ultrasonic velocity data. International Conference on Ophiolites and the Oceanic Lithosphere: Results of the Oman Drilling Project and Related Research, 2020
  • Keishi Okazaki, Eric Burdette, Greg Hirth. Rheology of the fluid oversaturated quartz shear zone at the brittle-ductile transition. AGU Fall Meeting 2019, 2019
  • 道林 克禎、柿畑 優季、片山 郁夫、岡本 敦、岡崎 啓史、Peter Kelemen、高澤 栄一、Damon Teagle、Oman Drilling Project Phase 2 Science Party. ちきゅう船上のXCTデータによる超マフィック岩の構造解析. 日本地球惑星科学連合2019年大会, 2019
  • Natsue Abe, Keishi Okazaki, Ikuo Katayama, Kohei Hatakeyama2, Benoit Ildefonse, Ole Ivar Ulven, Gilbert Hong, Wenlu Zhu, Benoit Cordonnier, Yuya Akamatsu, Katsuyoshi Michibayashi, Eiichi Takazawa, Michell Harris, Damon Teagle, Peter Kelemen, Marguerite Godard, Jurg Matter, Jude Coggon and The Oman Drilling Project Science Party. Physical properties of the Moho TZ: Implications from ICDP Oman Drilling Project Phase I & II on-board measurements. JpGU2019, 2019
  • 阿部なつ江，岡崎啓史，Annika Greeve，片山郁夫，畠山航平，赤松祐哉，Ole Ivar Ulven，Benoit Cordonnier，Gilbert Hong，Wenlu Zhu，道林克禎（，高澤栄一，Peter Kelemen，Damon Teagle，Jurg Matter，Jude Coggon，Marguerite Godard，Oman Drilling Project Science Party. ちきゅう」船上ラボにおけるICDPオマーン陸上掘削コアの岩石物性計測結果について. ブルーアースサイエンス・テク2019, 2019
  • Keishi Okazaki, Eric Burdette, Greg Hirth. Effects of the aqueous fluid and porosity on the rheology of quartz aggregates at the brittle-plastic transition. AGU Fall Meeting 2018 / MR23A-06, 2018
  • Ikuo Katayama, Keishi Okazaki, Natsue Abe, Ole Ivar Ulven, Gilbert Hong, Wenlu Zhu, Benoit Cordonnier, Kohei Hatakeyama, Yuya Akamatsu, Katsuyoshi Michibayashi, Marguerite Godard, Peter B Kelemen. Permeability profile across the crust-mantle sections in the Oman Drilling Project inferred from onboard measurements of dry and wet resistivity. AGU Fall Meeting 2018 ／　V12B-04, 2018
  • Katsuyoshi Michibayashi, Ikuo Katayama, Peter B Kelemen, Keishi Okazaki, Marguerite Godard, Eiichi Takazawa, Damon A H Teagle. Quantification of the downhole degree of serpentinization estimated by X-ray CT core imaging (Oman Drilling Project Phase 2, D/V CHIKYU). AGU Fall Meeting 2018 / V12B-01, 2018
  • Keishi Okazaki, Natsue Abe, Kohei Hatakeyama, Yuya Akamatsu, Eiichi Takazawa, Damon A H Teagle, Peter B Kelemen, Judith A. Coggon. Physical property of the fossilized crust-mantle transition zone from ICDP Oman Drilling Project Hole CM1A and CM2B. AGU Fall Meeting 2018 / V11B-03, 2018
  • 阿部なつ江、岡崎啓史、畠山航平、Benoit Ildefonse、立石大和、James Andrew Leong、道林克禎、高澤栄一、Peter Kelemen、Juan Calros de Obeso、Damon Teagle、 Jude Coggon、Michelle Harris. ICDPオマーン陸上掘削第1期(ChikyuOman2017)岩石物性～海洋底から衝上まで～. 日本鉱物科学会2018年会（山形大学）, 2018
  • Keishi Okazaki, Eric Burdette, Greg Hirth. Rheology of the fluid-overpressured quartz shear zone at the brittle-plastic transition: effects of the aqueous fluid and porosity. JpGU 2018[SCG53-24], 2018
  • Keishi Okazaki, Kohei Hatakeyama, Natsue Abe, James Andrew Leong, Katsuyoshi Michibayashi, Peter B Kelemen, Michelle Harris, Oman Drilling Project Phase 1 Science Party. Initial studies on the physical property measurement of listvenite, serpentinite and the metamorphic sole from ICDP Oman Drilling Project Hole BT1B. JpGU 2018[SCG54-14], 2018
  • Katsuyoshi Michibayashi, Keishi Okazaki, James Andrew Monton Leong, Peter B Kelemen, Kevin Johnson, Rebecca N Greenberger, Craig E Manning, Michelle Harris, Juan Carlos deObeso, Natsue Abe, Kohei Hatakeyama, Benoit Ildefonse, Eiichi TAKAZAWA, Damon A H Teagle, Jude Ann Jude. X-ray CT core imaging of Oman Drilling Project on D/V CHIKYU. JpGU 2018[SCG54-01], 2018
  • Katsuyoshi Michibayashi, Keishi Okazaki, James Andrew Monton Leong, Peter B Kelemen, Kevin T M Johnson, Rebecca N Greenberger, Craig E Manning, Michelle Harris, Juan Carlos de Obeso, Natsue Abe, Kohei Hatakeyama, Benoit Ildefonse, Eiichi Takazawa, Damon A H Teagle, Jude Ann Coggon. X-ray CT core imaging of Oman Drilling Project on D/V CHIKYU. AGU fallmeeting 2017 / V24E-01, 2017
  • Peter B Kelemen, Marguerite Godard , Kevin T M Johnson , Keishi Okazaki, Craig E Manning , Janos L Urai , Katsu Michibayashi, Michelle Harris, Jude Ann Coggon, Damon A H Teagle, The Oman Drilling Project Phase I Science Party. Peridotite carbonation at the leading edge of the mantle wedge: OmDP Site BT1. AGU fallmeeting 2017 / V24E-06, 2017
  • Pathikrit Bhattacharya, Allan M Rubin, Terry E Tullis, Keishi Okazaki, Nicholas M Beeler. Where did the time go? Friction evolves with slip following large velocity steps, normal stress steps, and (?) during long holds. American Geophysical Union Fall Meeting /S14B-08, 2016

Poster presentation(Belonging to JAMSTEC)

  • 永田 有里奈、平内 健一、岡崎 啓史. フィールドおよび実験的観察から推測される深部スロー地震発生域におけるアンチゴライト蛇紋岩の変形挙動. 地質学会2021　/　T3-P-3, 2021
  • 岡崎 啓史、武藤 潤. 巨大地震発生域下限付近の温度・圧力・間隙水圧条件を再現できる新しい固体圧岩石変形試験機の開発. 地質学会2021　/　R12-P-3, 2021
  • Yuya Akamatsu ，IKUO KATAYAMA，Keishi Okazaki, Michibayashi Katsuyoshi、Oman Drilling Project Phase I Science Party. Vein permeability structure of the crustal section in the Oman Drilling Project inferred from the X-ray CT image analysis. JpGU2021 / SCG41-P06, 2021
  • 長瀬 薫平、片山 郁夫、畠山 航平、岡崎 啓史. オマーン陸上掘削プロジェクトで得られたエピドサイトの弾性波速度に空隙形状が与える影響. JpGU2021　/　SCG41-03, 2021
  • Takehiro Hirose, Ryoichi Nakada, Keishi Okazaki, Takazo Shibuya. Quake-induced redox change in the interior of planets. AGU fall meeting 2020 / P042-0016, 2020
  • Natsue Abe, Keishi Okazaki, Kohei Hatakeyama, Yuya Akamatsu, Ikuo Katayama, Benoit Ildefonse, Katsuyoshi Michibayashi, Eiichi TAKAZAWA, Damon A H Teagle, Peter B Kelemen, Science Party The Oman Drilling Project. Important role of the ultramafic layers in the lower oceanic crust and Moho. JpGU-AGU Joint Meeting 2020, 2020
  • KUMPEI NAGASE, Ikuo Katayama, Kohei Hatakeyama, Yuya Akamatsu, Keishi Okazaki, Natsue Abe, Katsuyoshi Michibayashi. Pore geometry in diabase collected by the Oman DP inferred from elastic wave velocity. JpGU-AGU Joint Meeting 2020, 2020
  • 岡崎 啓史、武藤 潤、濱田 洋平、谷川 亘、廣瀬 丈洋. 巨大地震発生域下限の温度・圧力・間隙水圧条件を再現できる新しい固体圧岩石変形試験機の開発. JpGU-AGU Joint Meeting 2020, 2020
  • Kumpei Nagase, Ikuo Katayama, Tadashi Yokoyama, Kouhei Hatakeyama, Yuya Akamatsu, Keishi Okazaki, Natsue Abe, Katsuyoshi Michibayashi. Porosity of mafic and ultramafic core samples from the Oman Drilling Projects measured by the penetration and impregnation methods. International Conference on Ophiolites and the Oceanic Lithosphere: Results of the Oman Drilling Project and Related Research, 2020
  • Katsuyoshi MICHIBAYASHI1, SaebyulChOE, Jude COGGON, Margurette GODARD, Michelle HARRIS, Peter KELEMEN, Jurg Matter, Juan Carlos DE OBESO, Keishi OKAZAKI, Eiichi TAKAZAWA, Damon TEAGLE, the Oman Drilling Project Science Team. X-ray CT core imaging of the Oman Drilling Project on D/V CHIKYU. International Conference on Ophiolites and the Oceanic Lithosphere: Results of the Oman Drilling Project and Related Research, 2020
  • Kohei Hatakeyama, Ikuo Katayama, Natsue Abe, Keishi Okazaki, The Oman Drilling Project Science Party. Seismic velocity profile across the crust-mantle boundary determined from high-pressure experiments of core samples collected from the Oman Drilling Project. International Conference on Ophiolites and the Oceanic Lithosphere: Results of the Oman Drilling Project and Related Research, 2020
  • Natsue Abe, Keishi Okazaki, Ikuo Katayama, Kohei Hatakeyama, Benoit Ildefonse, Ole Ivar Ulven, Gilbert Hong, Wenlu Zh7, Benoit Cordonnier, Yuya Akamatsu, Katsuyoshi Michibayashi, Eiichi Takazawa, Michell Harris, Damon Teagle, Peter Kelemen, Marguerite Godard, Jurg Matter, Jude Coggon and The Oman Drilling Project Science Party. Relationship between the physical properties and hydration of the oceanic lower crust/ Moho TZ: results from onboard measurements of ICDP Oman Drilling Project. International Conference on Ophiolites and the Oceanic Lithosphere, 2020
  • Natue Abe, Kohei Hatakeyama, Keishi Okazaki, James Andrew Leong, Benoit Ildefonse, Yamato Tateishi, Michelle Harris, Katsu Michibayashi, Juan Carlos de Obeso, Damon Teagle, Eiichi Takazawa, Peter Kelemen, Jude Ann Coggon, Juerg Michael Matter and Oman Drilling Project Phase 1 Science Party. Initial studies of the petrophysics in the sheeted dikes and upper gabbro from Oman Drilling Project Hole GT3A. International Conference on Ophiolites and the Oceanic Lithosphere, 2020
  • Makoto Otsubo, Ayumu Miyakawa, Ikuo Katayama, Keishi Okazaki. An inhomogeneous conduit across slab controlled by spatial heterogeneity of intraslab stress in the Nankai subduction zone, southwestern Japan. AGU Fall Meeting 2019, 2019
  • Pathikrit Bhattacharya, Allan M Rubin, Terry E Tullis, Nicholas M Beeler, Keishi Okazaki. Where did the time go? The remarkable slip-sensitivity of fault healing at quasi-stationary slip rates. AGU Fall Meeting 2019, 2019
  • Takehiro Hirose, Ryoichi Nakada, Keishi Okazaki, Takazo Shibuya. Change in redox conditions by a quake in the interior of planets. AGU Fall Meeting 2019 / P11C-3465, 2019
  • 廣瀬丈洋, 中田亮一, 岡崎啓史, 渋谷岳造. 地震断層運動に伴うオリビン結晶内のFeの酸化還元状態変化. 日本地質学会第126年学術大会, 2019
  • 大坪 誠、宮川 歩夢、片山 郁夫、岡崎 啓史. Inhomogeneous conduit across slab controlled by intraslab stress heterogeneity in the Nankai subduction zone. 日本地球惑星科学連合2019年大会, 2019
  • Takehiro Hirose, Wataru Tanikawa, Yohei Hamada, Keishi Okazaki. A new hydrothermal, low to high speed rotary-shearing apparatus: Reproduction of slow/megathrust earthquakes in laboratory. 日本地球惑星科学連合2019年大会, 2019
  • 岡崎 啓史、片山 郁夫、山口 飛鳥. 半遠洋性堆積物の続成作用に伴う摩擦・透水特性の変化. 日本地球惑星科学連合2019年大会, 2019
  • 岡崎 啓史、阿部 なつ江、畠山 航平、赤松 祐哉、片山 郁夫、高澤 栄一、Damon Teagle、Peter Kelemen、Jude Coggon、Oman Drilling Prj Ph2 Sci. Party. Physical property of the fossilized crust-mantle transition zone from ICDP Oman Drilling Project Hole CM1A and CM2B measured onboard D/V Chikyu. 日本地球惑星科学連合2019年大会, 2019
  • 片山 郁夫、岡崎 啓史、阿部 なつ江、Ulven Ole Ivar、Hong Gilbert、Zhu Wenlu、Cordonnier Benoit、畠山 航平、赤松 祐哉、道林 克禎、Godard Marguerite、Kelemen Peter、The Oman Drilling Project Phase 2 Science Party. Permeability profile in the Oman Drilling Project inferred from resistivity measurements. 日本地球惑星科学連合2019年大会, 2019
  • Natsue Abe, Keishi Okazaki, Ikuo Katayama, Kohei Hatakeyama, Ole Ivar Ulven, Gilbert Hong, Wenlu Zhu, Benoit Cordonnier, Yuya Akamatsu, Katsuyoshi Michibayashi, Eiichi Takazawa, Marguerite Godard, Teagle Damon, Peter Kelemen, Juerg Michael Matter, Jude Ann Coggon and The Oman Drilling Project Phase II Science Party. Initial report of physical property measurements, ChikyuOman 2018: Crust-Mantle boundary and the mantle section from ICDP Oman Drilling Project Phase II. AGU Fall Meeting 2018, 2018
  • 岡崎啓史, 片山郁夫, 山口飛鳥. 半遠洋性堆積物の続成作用に伴う透水・摩擦特性変化. 日本地質学会第125年学術大会, 2018
  • 鈴木孝弘・濱田洋平・廣瀬丈洋・谷川 亘・岡㟢啓史・多田井 修. 室内掘削実験を通した掘削等価強度法の検証. 日本地質学会第125年学術大会, 2018
  • Keishi Okazaki, Natsue Abe, Kohei Hatakeyama, Benoit Ildefonse, James Andrew Monton Leong, Yamato Tateishi, Damon A H Teagle, Eiichi Takazawa, Peter B Kelemen, Katsuyoshi Michibayashi, Jude Ann Coggon, Michelle Harris, Juan Carlos de Obeso. Initial report of the physical property measurement, ChikyuOman core description Phase I: sheeted dike and gabbro boundary from ICDP Holes GT1A, GT2A and GT3A. AGU fallmeeting 2017 / V43G-2951, 2017
  • Kohei Hatakeyama, Keishi Okazaki, Natsue Abe, James Andrew Monton Leong, Katsuyoshi Michibayashi, Peter B Kelemen, Michelle Harris. Initial results on the physical property measurement of ChikyuOman cores: listvenite, serpentinite and the metamorphic sole from ICDP Hole BT1B. AGU fallmeeting 2017 / V43G-2943, 2017
  • Eric Burdette, Keishi Okazaki, Greg Hirth,. The Role of Compliance and Reaction Rate in Dehydration Weakening and Frictional Stability of Antigorite. AGU fallmeeting 2017 / T41D-0655, 2017
  • Melodie E French, Greg Hirth, Keishi Okazaki. The constitutive behavior of antigorite gouge under fluid-saturated undrained conditions. AGU fallmeeting 2017 / MR21B-0449, 2017
  • 岡崎啓史・濱田洋平・Greg Hirth・片山郁夫. 蛇紋石の脱水弱化･脆性化によってもたらされる多様な断層すべり挙動．. 日本地質学会第124年学術大会（2017愛媛大会), 2017
  • 岡崎 啓史、Hirth Greg、片山 郁夫. Experimental investigation of dehydration weakening and embrittlement of antigorite serpentinite and possible mechanisms to induce various fault slip behaviors in subduction zones. JpGU-AGU2017 / SCG66-P05, 2017
  • Greg Hirth, Keishi Okazaki, Brooks Proctor. Experimental investigation of processes responsible for dehydration weakening and embrittlement. American Geophysical Union Fall Meeting / T21D-2870, 2016
  • Keishi Okazaki, Greg Hirth. Deformation Experiment on Quartz Aggregates with High Porosity and High Water Contents at High Pressure and Temperature. American Geophysical Union Fall Meeting /S41B-2780, 2016

Poster presentation Invited(Belonging to JAMSTEC)

  • Ikuo Katayama, Natsue Abe, Keishi Okazaki, Kohei Hatakeyama, Yuya Akamatsu, Katsuyoshi Michibayashi, Marguerite Godard, Peter B Kelemen, Phase 2 Science Party The Oman Drilling Project. Crack aspect ratio in the serpentinized peridotites inferred from onboard ultrasonic data by the Oman Drilling Projects. JpGU-AGU Joint Meeting 2020, 2020

Contributions

  • 2019/06　2019.06.03 研究紹介（Elms大学、高知県立大学）
  • 2018/04　2018.04.19 インタビュー体験（高知国際中学校）
  • 2017/03　出前授業（高知市立愛宕中学校）