Publications

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Peer-reviewed publications:

(Bold denotes our lab member)

32. Katayama, I., Okazaki, K., & Okamoto, A. (2023). Role of mantle carbonation in trench outer‐rise region in the global carbon cycle. Island Arc, 32(1), e12499. https://doi.org/10.1111/iar.12499

31. Akamatsu, Y., Katayama, I., Okazaki, K., & Michibayashi, K. (2023). Paleo‐Permeability Structure of the Crustal Section of the Samail Ophiolite Based on Automated Detection of Veins in X‐Ray CT Core Images From the Oman Drilling Project. Geochemistry, Geophysics, Geosystems, 24(6), e2022GC010792. https://doi.org/10.1029/2022GC010792

30. Akamatsu, Y., Nagase, K., Abe, N., Okazaki, K., Hatakeyama, K., & Katayama, I. (2023). Cross‐Property Relationship between Electrical Resistivity and Elastic Wave Velocity of Crustal Rocks from the Oman Drilling Project Hole GT3A: Implications for in situ Geophysical Properties of Oceanic Crust. Journal of Geophysical Research: Solid Earth, e2022JB026130. https://doi.org/10.1029/2022JB026130

29.  Naotaka Tomioka, Akira Yamaguchi, Motoo Ito, Masayuki Uesugi, Naoya Imae, Naoki Shirai, Takuji Ohigashi, Makoto Kimura, Ming-Chang Liu, Richard C. Greenwood, Kentaro Uesugi, Aiko Nakato, Kasumi Yogata, Hayato Yuzawa, Yu Kodama, Kaori Hirahara, Ikuya Sakurai, Ikuo Okada, Yuzuru Karouji, Keishi Okazaki, Kosuke Kurosawa, Takaaki Noguchi, Akira Miyake, Masaaki Miyahara, Yusuke Seto, Toru Matsumoto, Yohei Igami, Satoru Nakazawa, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Makoto Yoshikawa, Akiko Miyazaki, Masahiro Nishimura, Toru Yada, Masanao Abe, Tomohiro Usui, Sei-ichiro Watanabe & Yuichi Tsuda.  A history of mild shocks experienced by the regolith particles on hydrated asteroid Ryugu. Nature Astronomy, 7, 669– 677, https://doi.org/10.1038/s41550-023-01947-5, 2023. （プレスリリース: 広大, JAMSTEC）

28. Yohan Park, Shintaro Azuma, Keishi Okazaki, Kentaro Uesugi, Masahiro Yasutake, Yu Nishihara, Ryuichi Nomura. Development of lattice-preferred orientations of MgO periclase from strain rate controlled shear deformation experiments under pressure up to 120 GPa. Geophysical Research Letters, 49, e2022GL100178. https://doi. org/10.1029/2022GL100178, 2022.

27. Pathikrit Bhattacharya, Allan M. Rubin, Terry E. Tullis, Nicholas M. Beeler, Keishi Okazaki. The evolution of rock friction is more sensitive to slip than elapsed time, even at near-zero slip rates. Proceedings of the National Academy of Sciences, 119, e2119462119. https://doi.org/10.1073/pnas.2119462119, 2022

26. Papeschi, S., Vannucchi, P., Hirose, T., Okazaki, K., Deformation and material transfer in a fossil subduction channel: Evidence from the Island of Elba (Italy). Tectonics, 41, e2021TC007164. https://doi.org/10.1029/2021TC007164, 2022.

25. Nagase, K., Hatakeyama, K., Okazaki, K., Akamatsu, Y., Abe, N., Michibayashi, K., & Katayama, I., Simultaneous measurements of elastic wave velocity and porosity of epidosites collected from the Oman ophiolite: Implication for low VP/VS anomaly in the oceanic crust. Geophysical Research Letters, 49, e2022GL098234. https://doi.org/10.1029/2022GL098234, 2022.

24. 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, Jürg M. Matter, Damon A.H. Teagle, Michelle Harris, Katsuyoshi Michibayashi, Eiichi Takazawa, Zaher Al Sulaimani and the Oman Drilling Project Science Team, 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, https://doi.org/10.1029/2021JB022352, 2022. 

23.  Okazaki, K., K. Michibayashi, K. Hatakeyama, N. Abe, K. Johnson, P. Kelemen, the Oman Drilling Project Science Team, 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, 126, e2021JB022719. https://doi.org/10.1029/2021JB022719, 2021.

22. Hatakeyama, K., I. Katayama, N. Abe, K. Okazaki, K. Michibayashi, 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, 126, e2021JB021923. https://doi. org/10.1029/2021JB021923, 2021.

21.  Katayama, Ikuo, N. Abe, K. Okazaki, K. Hatakeyama, Y. Akamatsu, K. Michibayashi, M. Godard, P. Kelemen, Crack geometry of serpentinized peridotites inferred from onboard ultrasonic data from the Oman Drilling Project, Tectonophysics, 814, 228978, https://doi.org/10.1016/j.tecto.2021.228978, 2021.

20. Kurosawa, K., Genda, H., Azuma, S. , Okazaki, K., The Role of Post‐Shock Heating by Plastic Deformation During Impact Devolatilization of Calcite (CaCO3). Geophysical Research Letters, 48(7), e2020GL091130, https://doi.org/10.1029/2020GL091130, 2021.

19. Okazaki, K., E. Burdette, G. Hirth, Rheology of the fluid oversaturated fault zones at the brittle-plastic transition, Journal of Geophysical Research: Solid Earth, 126, e2020JB020804, https://doi.org/10.1029/2020JB020804, 2021.

18. Beinlich, A., O. Plümper, E. Boter, I.A. Müller, F. Kourim, M. Ziegler, Y. Harigane, R.  Lafay, P.B. Kelemen, the Oman Drilling Project Science Team, Ultramafic Rock Carbonation: Constraints From Listvenite Core BT1B, Oman Drilling Project, Journal of Geophysical Research: Solid Earth, 125(6), e2019JB019060, 2020.

17. Menzel, M. D., J.L. Urai, J.C. de Obeso, A. Kotowski, C.E. Manning, P.B. Kelemen, M. Kettermann, A.P. Jesus, Y. Harigane, the Oman Drilling Project Phase 1 Science Team, Brittle Deformation of Carbonated Peridotite—Insights From Listvenites of the Samail Ophiolite (Oman Drilling Project Hole BT1B), Journal of Geophysical Research: Solid Earth, 125(10), e2020JB020199, 2020.

16. Yoshida, K., A. Okamoto, H. Shimizu, R. Oyanagi, N. Tsuchiya, the Oman Drilling Project Phase 2 Science Team, Fluid Infiltration Through Oceanic Lower Crust in Response to Reaction-Induced Fracturing: Insights From Serpentinized Troctolite and Numerical Models, Journal of Geophysical Research: Solid Earth, 125(11), e2020JB020268, 2020.

15. Katayama, I, N.  Abe, K. Hatakeyama, Y. Akamatsu, K. Okazaki, O.I. Ulven, G. Hong, W. Zhu, B. Cordonnier, K. Michibayashi, 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, 125, e2019JB018698, https://doi.org/10.1029/2019JB018698, 2020.

14. Okazaki, K.,  G. Hirth, Deformation of mafic schists from subducted oceanic crust at high pressure and temperature conditions,  Tectonphysics, 228217, https://doi.org/10.1016/j.tecto.2019.228217, 2019.    

13. French, M.E., G.Hirth, K. Okazaki, Fracture-Induced Pore Fluid Pressure Weakening and Dehydration of Serpentinite, Tectonophysics, 228168, https://doi.org/10.1016/j.tecto.2019.228168, 2019.

12. Otsubo, M., A. Miyakawa, I. Katayama,  K. Okazaki, An inhomogeneous across-slab conduit controlled by intraslab stress heterogeneity in the Nankai subduction zone, Scientific Reports, 9, 994,  https://doi.org/10.1038/s41598-018-38142-w, 2019 （プレスリリース・日本語解説）.

11. Kelemen, PB., 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 Noël, K. Okazaki, P Renforth, B Robinson, H Savage, R Skarbek, MW Spiegelman, E Takazawa, D Teagle, JL Urai, J Wilcox, and Oman Drilling Project Phase 1 Science Party, In situ carbon mineralization in ultramafic rocks: Natural processes and possible engineered methods, Energy Procedia, 146, 92-102, https://doi.org/10.1016/j.egypro.2018.07.013, 2018.

10. Okazaki, K., G. Hirth, Dehydration of lawsonite can directly trigger earthquakes in subducting oceanic crust, Nature, 530, 81-84, doi:10.1038/nature16501, 2016. 日本語ハイライト, Daily Mailの記事

9. Okazaki, K., I. Katayama, Slow stick–slip of antigorite serpentinite under hydrothermal conditions as a possible mechanism of slow earthquakes, Geophysical Research Letter, 42, 1099-1104, DOI: 10.1002/2014GL062735, 2015.

8. Okazaki, K., H. Noda, S-I., Uehara, T., Shimamoto, Permeability, porosity and pore geometry evolution during compaction of Neogene sedimentary rocks, Journal of Structural Geology, 62, 1-12, http://dx.doi.org/10.1016/j.jsg.2013.12.010, 2014.

7. Katayama, I., M. Iwata, K. Okazaki, K. Hirauchi, Slow earthquakes associated with fault healing on a serpentinized plate interface, Scientific Reports, 3, 1-4, DOI: 10.1038/srep01784, 2013.

6. Okazaki, K., I, Katayama, H. Noda, Shear-induced permeability anisotropy of simulated serpentinite gouge produced by triaxial deformation experiments, Geophysical Research Letter, 40, 1–5, doi:10.1002/grl.50302, 2013.

5. Okazaki, K., I., Katayama, M., Takahashi, Effect of pore fluid pressure on the frictional strength of antigorite serpentinite, Tectonophysics, http://dx.doi.org/10.1016/j.tecto.2012.10.017, 2012.

4. Katayama, I., T. Terada, K. Okazaki, W. Tanikawa, Episodic tremor and slow slip potentially linked to permeability contrasts at the Moho, Nature Geoscience, Nature Publishing Group, 5, 731–734, doi:10.1038/ngeo1559, 2012. 

3. Uehara, S-I., T. Shimamoto, K. Okazaki, H. Funaki, H. Kurikami, T. Niizato, Y. Ohnishi, Can surface samples be used to infer underground permeability structure? A test case for a Neogene sedimentary basin in Horonobe, Japan, International Journal of Rock Mechanics and Mining Science, 56, 1–14, 2012.

2. Takahashi, M., S.-I. Uehara, K. Mizoguchi, I. Shimizu, K. Okazaki, K. Masuda, On the transient response of serpentine (antigorite) gouge to stepwise changes in slip velocity under high-temperature conditions, Journal of Geophysical Research, 116, B10405, doi:10.1029/2010JB008062, 2011.

1. Kawano, S., I. Katayama, K. Okazaki, Permeability anisotropy of serpentinite and fluid pathways in a subduction zone, Geology, 39, 939-942, 2011.

国内（日本語）雑誌に掲載された査読付き論文:

3.  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、浜田洋平、岡﨑啓史、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地域調査：須崎市野見湾を例に、沿岸海洋研究、59(1)、2021.

2. 長瀬董平、片山郁夫、畠山航平、赤松祐也、岡﨑啓史、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、126(12), 713–717, 2020.

1. 上原真一，嶋本利彦，松本拓真，新里忠史，岡崎啓史，高橋美紀，地下深部における新第三紀泥質軟岩中の亀裂の透水特性～室内試験による推定～, 資源と素材, 127, 139-144, 2011.

Other publications:

4. 岡﨑啓史、濱田洋平、熱水環境下での岩石変形実験に基づく沈み込み帯プレート境界の摩擦特性とすべり挙動の多様性に関する考察、月間地球、582-590, 44, 11, 2022.

3. 氏家恒太郎、岡崎啓史、平内健一、ウォリスサイモン、総説：スロー地震に関する地質学的・実験的・地震学的研究の連携と進展、月間地球、511-513, 44, 11, 2022.

2. Kelemen, P.B., J.M., Matter, D.A.H. Teagle, J.A. Coggon, the Oman Drilling Project Science Team, Proceedings of the Oman Drilling Project: College Station, TX (International Ocean Discovery Program), https://doi.org/10.14379/OmanDP.proc.2020, 2020.

1. 岡崎啓史, 蛇紋岩の変成・変形組織観察と岩石変形実験に基づくスロー地震発生機構の解明, 平成23年度深田研究助成研究報告書, 深田地質研究所, 41-47, 2012.