Superplasticity of minerals

• Project/Area Number: 23684043
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: The University of Tokyo
• Principal Investigator: HIRAGA Takehiko 東京大学, 地震研究所, 准教授 (10444077)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2011: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
• Keywords: 超塑性 / マントル / オリビン / フォルステライト / 粒界すべり / 選択配向 / カンラン石 / 輝石 / 多相系 / レオロジー

Research Abstract

Grain size reduction accompanied by an increment of the fraction of the secondary phase is confirmed (Tasaka & Hiraga JGR 2013). Such condition allows the rock to deform via superplastic flow (Tasaka, Hiraga & Zimmerman JGR 2013). Phase aggregation during superplastic flow, wich is confirmed experimentally, is idendtified in natural rocks (Hiraga et al. Geology 2013). Development of crystallographic preferred orientation of olivine is identifed during the Newtonian creep of the olivine aggregates.

Research Products

• [Journal Article] Influence of mineral fraction on the rheological properties of forsterite + enstatite during grain size sensitive creep: 3 Application of grain growth and flow laws on peridotite ultramylonite (2014)
  • Author(s): Tasaka, M., Hiraga, T. and Michibayashi, K.
  • Journal Title: J. Geophys. Res. Volume: 119 Issue: 2 Pages: 840-857
  • DOI: 10.1002/2013jb010619
  • Peer Reviewed
• [Journal Article] Influence of mineral fraction on the rheological properties of forsterite + enstatite during grain size sensitive creep: 3 Application of grain growth and flow laws on peridotite ultramylonite1: Grain size and grain growth laws. (2014)
  • Author(s): Tasaka, M., Hiraga, T. and Michibayashi, K.
  • Journal Title: J. Geophys. Res. Volume: 119 Pages: 840-857
  • Peer Reviewed
• [Journal Article] Influence of mineral fraction on the rheological properties of forsterite + enstatite during grain-size-sensitive creep: 2. Deformation experiments (2013)
  • Author(s): Tasaka, M., Hiraga, T. and Zimmerman, M.E.
  • Journal Title: J. Geophys. Res. Volume: 118 Issue: 8 Pages: 3991-4012
  • DOI: 10.1002/jgrb.50285
  • Peer Reviewed
• [Journal Article] Influence of mineral fraction on the rheological properties of forsterite + enstatite during gra in size sensitive creep 1: Grain size and grain growth laws (2013)
  • Author(s): Tasaka, M. and Hiraga, T.
  • Journal Title: J. Geophys. Res. Volume: 118 Issue: 8 Pages: 3970-3990
  • DOI: 10.1002/jgrb.50284
  • Peer Reviewed
• [Journal Article] Comparison of microstructures in superplastically deformed synthetic materials and natural mylonites : Mineral aggregation via grain boundary sliding (2013)
  • Author(s): Hiraga, T., Miyazaki, T. Yoshida, H. and Zimmerman, M. E
  • Journal Title: Geology Volume: 41, 9 Pages: 959-962
  • Peer Reviewed
• [Journal Article] Olivine crystals align during diffusion creep of Earth's upper mantle (2013)
  • Author(s): Miyzaki, T., Sueyoshi, K. and Hiraga T
  • Journal Title: Nature Volume: 502 Pages: 321-326
  • Peer Reviewed
• [Journal Article] Comparison of microstructures in superplastically deformed synthetic materials and natural mylonites: Mineral aggregation via grain boundary sliding (2013)
  • Author(s): Hiraga, T., Miyazaki, T. Yoshida, H. and Zimmerman, M.E.
  • Journal Title: Geology Volume: 41 Pages: 959-962
  • Peer Reviewed
• [Journal Article] Olivine crystals align during diffusion creep of Earth's upper mantle (2013)
  • Author(s): Miyazaki, T., Sueyoshi, K. and Hiraga T.
  • Journal Title: Nature Volume: 502 Pages: 321-326
  • Peer Reviewed
• [Presentation] Development of crystal preferred orientation of olivine during diffusion creep : a matter of olivine crystal shape (2013)
  • Author(s): Miyazaki, T., Sueyoshi, K. and Hiraga T
  • Organizer: American Geophysical Union, Fall Meeting
  • Place of Presentation: San Francisco, U.S.A
  • Year and Date: 2013-12-11
• [Presentation] Development of crystal preferred orientation of olivine during diffusion creep: a matter of olivine crystal shape (2013)
  • Author(s): Miyazaki, T., Sueyoshi, K. and Hiraga T.
  • Organizer: American Geophysical Union, Fall Meeting
  • Place of Presentation: San Francisco, U.S.A
• [Presentation] Atmospheric pressure creep experiments using highly dense fine-grained mineral aggregates (2012)
  • Author(s): Takehiko Hiraga
  • Organizer: American Geophysical Union
  • Place of Presentation: San Francisco, USA
• [Presentation] The effects of mineral fraction on the rheological properties during grain size sensitive creep (2012)
  • Author(s): Miki Tasaka
  • Organizer: American Geophysical Union
  • Place of Presentation: San Francisco, USA
• [Presentation] Development of lattice preferred orientation in fine-grained forsterite aggregates (2012)
  • Author(s): Tomonori Miyazaki
  • Organizer: American Geophysical Union
  • Place of Presentation: San Francisco, USA
• [Presentation] Comparison of microstructure of superplastically deformed synthetic materials and ultramylonite: Coalescence of secondary mineral grains via grain boundary sliding (2011)
  • Author(s): Takehiko Hiraga
  • Organizer: American Geophysical Union
  • Place of Presentation: San Francisco, USA
  • Invited
• [Remarks] 地球の物理学事典平賀岳彦ほか共訳朝倉書店P.136-166, 2013年