In-situ observations on semi-brittle behavior of peridotite: Implications for the occurrence of intermediate earthquakes

• Project/Area Number: 25707040
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Petrology/Mineralogy/Economic geology
• Research Institution: Ehime University
• Principal Investigator: Ohuchi Tomohiro 愛媛大学, 地球深部ダイナミクス研究センター, 講師 (60570504)
• Research Collaborator: NISHIHARA Yu ; LEI Xinglin
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2013: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
• Keywords: 稍深発地震 / 深発地震 / アコースティック・エミッション / スラブ / 地震発生の素過程 / カンラン石 / カンラン岩 / 高圧 / 上部マントル / 地震 / 水

Outline of Final Research Achievements

The objective of this project is to understand the process of intermediate-depth and deep-focus earthquakes from the viewpoint of mineral physics. To evaluate the semi-brittle behavior of slab-forming rocks (i.e., harzburgite), acoustic emission monitoring is essential as well as measurements on strain and stress at high pressures and high temperatures. Such experimental techniques have been developed by Schubnel et al. (2013), who belong to a French-USA international research group. Our measurement system is now applicable to the semi-brittle behavior of rocks as well as the Schubnel's system. Using our measurement system, axial compression experiments on rocks are possible at high pressures and temperatures. Thus, the process of rock failure will be clarified by our group.

Research Products

• [Journal Article] In situ observation of crystallographic preferred orientation of deforming olivine at high pressure and high temperature (2015)
  • Author(s): Ohuchi, T., Nishihara, Y., Seto, Y., Kawazoe, T., Nishi, M., Maruyama, G., Hashimoto, M., Higo, Y., Funakoshi, K.-I., Suzuki, A., Kikegawa, T., Irifune, T.
  • Journal Title: Physics of the Earth and Planetary Interiors Volume: 243 Pages: 1-21
  • DOI: 10.1016/j.pepi.2015.04.004
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Dislocation-accommodated grain boundary sliding as the major deformation mechanism of olivine in the Earth’s upper mantle (2015)
  • Author(s): Ohuchi, T., Kawazoe, T., Higo, Y., Funakoshi, K., Suzuki, A., Kikegawa, T. and Irifune, T.,
  • Journal Title: Science Advances Volume: 1 Issue: 9
  • DOI: 10.1126/sciadv.1500360
  • NAID: 130005482975
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] In situ observation of crystallographic preferred orientation of deforming olivine at high pressure and high temperature. (2015)
  • Author(s): Ohuchi, T., Nishihara, Y., Seto, Y., Kawazoe, T., Nishi, M., Maruyama, G., Hashimoto, M., Higo, Y., Funakoshi, K, Suzuki, A., Kikegawa, T., Irifune, T.
  • Journal Title: Phys. Earth Planet. Sci. Volume: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Rheology of fine-grained forsterite aggregate at deep upper mantle conditions. (2014)
  • Author(s): Nishihara, Y., Ohuchi, T., Kawazoe, T., Spengler, D., Tasaka, M., Kikegawa, T., Suzuki, A., Ohtani, E
  • Journal Title: J. Geophys. Res. Volume: 119 Pages: 253-273
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Crystallographic preferred orientation of olivine in the Earth’s deep upper mantle. (2014)
  • Author(s): Ohuchi, T., Irifune, T.
  • Journal Title: Phys. Earth Planet. Inter. Volume: 228 Pages: 220-231
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Crystallographic preferred orientation of wadsleyite and ringwoodite: Effects of phase transformation and water on seismic anisotropy in the mantle transition zone. (2014)
  • Author(s): Ohuchi, T., Fujino, K., Kawazoe, T., Irifune, T.
  • Journal Title: Earth Planet. Sci. Lett.. Volume: 397 Pages: 133-144
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Rheology of fine-grained forsterite aggregate at deep upper mantle conditions. (2014)
  • Author(s): Nishihara, Y., Ohuchi, T., Kawazoe, T., Spengler, D., Tasaka, M., Kikegawa, T., Suzuki, A., Ohtani, E.
  • Journal Title: J. Geophys. Res. Volume: in press
  • Peer Reviewed
• [Journal Article] Development of A-type olivine fabric in water-rich deep upper mantle. (2013)
  • Author(s): Ohuchi, T., Irifune, T.
  • Journal Title: Earth Planet. Sci. Lett. Volume: 362 Pages: 20-30
  • Peer Reviewed
• [Journal Article] Seismic anisotropy in the mantle transition zone induced by shear deformation of wasleyite. (2013)
  • Author(s): Kawazoe, T., Ohuchi, T., Nishihara, Y., Nishiyama, N., Fujino, K., Irifune, T.
  • Journal Title: Phys. Earth Planet. Inter. Volume: 216 Pages: 91-98
  • Peer Reviewed
• [Presentation] Technical developments on acoustic emissions monitoring under the upper mantle conditions (2016)
  • Author(s): Ohuchi, T., Lei, X., Higo, Y., Tange, Y., Irifune, T.
  • Organizer: Misasa International Symposium 2016
  • Place of Presentation: ブランナール三朝（倉吉・鳥取）
  • Year and Date: 2016-03-09
  • Int'l Joint Research
• [Presentation] In situ observation of crystallographic preferred orientation of deforming olivine at high pressure and high temperature (2015)
  • Author(s): Ohuchi, T., Nishihara, Y., Seto, Y., Kawazoe, T., Nishi, M., Maruyama, G., Higo, Y., Funakoshi, K., Irifune, T.
  • Organizer: American Geophysical Union Fall Meeting 2015
  • Place of Presentation: モスコーニセンター（サンフランシスコ・米国）
  • Year and Date: 2015-12-16
  • Int'l Joint Research / Invited
• [Presentation] Grain boundary sliding as the major deformation mechanism of olivine in Earth’s upper mantle (2015)
  • Author(s): Ohuchi, T., Kawazoe, Higo, Y., Funakoshi, K., Suzuki, A., Kikegawa, T., Irifune, T.
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ（千葉・幕張）
  • Year and Date: 2015-05-28
  • Int'l Joint Research
• [Presentation] ワズレアイト・リングウッダイトの結晶方位定向配列 (2014)
  • Author(s): 大内智博，藤野清志，入舩徹男
  • Organizer: 高圧討論会2014
  • Place of Presentation: 徳島大学（徳島・徳島市）
  • Year and Date: 2014-11-22
• [Presentation] カンラン石の結晶方位定向配列発達の高温高圧下その場観察実験：上部マントルの地震波速度異方性の強度発達 (2014)
  • Author(s): 大内智博、西原遊、瀬戸雄介、川添貴章、西真之、丸山玄太、橋本美華、肥後祐司、舟越賢一、鈴木昭夫、亀卦川卓美、入舩徹男
  • Organizer: 日本地球惑星連合2014年大会
  • Place of Presentation: 幕張メッセ（千葉・幕張）
  • Year and Date: 2014-04-30
• [Presentation] In-situ observation of crystallographic preferred orientation of olivine deformed in simple shear. (2013)
  • Author(s): Ohuchi, T., Nishihara, Y., Seto, Y., Kawazoe, T., Nishi, M., Maruyama, G., Higo, Y., Funakoshi, K., Irifune, T.
  • Organizer: 2013 Workshop of the IUCr Commision on High Pressure Advances in Static and Dynamic High-Pressure Crystallography
  • Place of Presentation: ハンブルグ・ドイツ連邦
• [Presentation] カンラン石の結晶方位定向配列の高温高圧下その場観察実験． (2013)
  • Author(s): 大内智博，西原遊，瀬戸雄介，川添貴明，西真之，丸山玄太，肥後祐司，舟越賢一，入舩徹男
  • Organizer: 日本地球惑星連合2013年大会
  • Place of Presentation: 幕張