Behavior of Fe-bearing materials under very high pressure and mineralogy of the lowermost mantle and the inner core.

2010 Fiscal Year Self-evaluation Report

• Project/Area Number: 20001005
• Research Category: Grant-in-Aid for Specially Promoted Research
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering; Mathematics and Physics
• Research Institution: Ehime University
• Principal Investigator: IRIFUNE Tetsuo Ehime University, 地球深部ダイナミクス研究センター, 教授 (80193704)
• Project Period (FY): 2008 – 2012
• Keywords: ヒメダイヤ / 超高圧実験 / 第一原理計算 / 地球・惑星内部 / マントル・核

Research Abstract

ナノ多結晶ダイヤモンド(ヒメダイヤ)の、大型化を推進するとともに、超高圧発生装置への本格的応用をおこなう。一方で、焼結ダイヤモンドを用いたマルチアンビル装置(MA)の圧力限界の拡大、超音波技術による下部マントル領域下での弾性波速度精密測定、地球全領域をカバーするダイヤモンドアンビル装置(DAC)技術の開発、を重点的技術課題とする。これらの技術の開発とともに、第一原理計算の専門家との連携のもと、マントル深部～核領域におけるFe の挙動に重点を置いた、物質科学的研究をすすめる。

Research Products

• [Journal Article] Prediction of a hexagonal SiO2 phase affecting stabilities of MgSiO3 and CaSiO3 at multimegabar pressures (2011)
  • Author(s): Tsuchiya, J.Tsuchiya
  • Journal Title: Proc.Ntnl.Acad.Sci. 108 Pages: 1252-1255
  • Peer Reviewed
• [Journal Article] Iron partitioning and density changes of pyrolite in Earth's lower mantle (2010)
  • Author(s): T.Irifune, T.Shinmei, C.A.McCammon, N.Miyajima, D.C.Rubie, D.J.Frost
  • Journal Title: Science 327 Pages: 193-195
  • Peer Reviewed
• [Journal Article] Unified analyses for P-V-T equation of state of MgO: A solution for pressurescale problems in high P-T experiments (2009)
  • Author(s): Y.Tange, Y.Nishihara, T.Tsuchiya
  • Journal Title: J.Geophys.Res. 114 Pages: B03208
  • Peer Reviewed
• [Presentation] Nano-polycrystalline diamond: a potential third-generation ultrahard material for LVP experiments (2010)
  • Author(s): T.Irifune
  • Organizer: Workshop for Extreme Conditions Research in a Large Volume Press at PETRAII
  • Place of Presentation: Lunerburg, Germany.(Invited Talk)(Keynote Lecture)
  • Year and Date: 2010-10-15
• [Presentation] Ab initio modeling of thermal chemical properties of the core-mantle boundary region (2010)
  • Author(s): T.Tsuchiya, K.Kawai
  • Organizer: The 12th Symposium of SEDI
  • Place of Presentation: Santa Barbara, USA.(Invited Talk)
  • Year and Date: 2010-07-21
• [Presentation] Nature and application of nano-polycrystalline diamond synthesized by direct conversion in large-volume multianvil apparatus (2010)
  • Author(s): T.Irifune
  • Organizer: NDNC2010
  • Place of Presentation: Suzhou, China.
  • Year and Date: 2010-05-27
• [Presentation] Development of multianvil technology and its application to deep Earth mineralogy and novel materials synthesis (2009)
  • Author(s): T.Irifune
  • Organizer: AIRAPT-22 & HPCJ-50
  • Place of Presentation: Tokyo, Japan.(Special Lecture)
  • Year and Date: 2009-07-27
• [Presentation] Development of multianvil high-pressure technology with sintered diamond anvils and phase transitions in pyrolite under the lower mantle P, T conditions (2008)
  • Author(s): T.Irifune
  • Organizer: IGC-2008
  • Place of Presentation: Oslo, Norway(Invited Talk)
  • Year and Date: 2008-08-07
• [Book] 現代地球科学(第2章「地球内部を探る」22-39,第3章「地球内部の物質と構造」40-59) (2011)
  • Author(s): 入舩徹男
  • Publisher: NHK
• [Book] Journal of Earth Science (Special issue, editors) (2010)
  • Author(s): H.W.Green II, J.Zhang, L.F.Dobrzhinetskaya, T.Irifune
  • Total Pages: 327
  • Publisher: Springer
• [Book] Nano-polycrystalline Diamond without Binder and their Variety of Applications in Comprehensive Hard Materials
  • Author(s): T.Irifune, H.Sumiya
  • Publisher: Elsevier(in press)
• [Remarks] GRCホームページにおいて成果や活動を報告
  • URL: http://www.ehime-u.ac.jp/~grc/