Mechanisms of subgrain boundary development and grain size decrease in mylonite

• Project/Area Number: 21540501
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: RAIMBOURG Hugues 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, 招聘研究員 (40509709)
• Co-Investigator(Kenkyū-buntansha): KOGURE Toshihiro 東京大学, 大学院・理学研究科, 准教授 (50282728)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: 岩石変形 / マイロナイト / 細粒化 / 粒界 / 斜方輝石 / TEM / EBSD / FIB / 結晶粒界 / 転位 / 化学組成 / 走査型透過電子顕微鏡 / 単斜輝石 / 緑泥石 / 輝石 / 再結晶化 / すべり褶曲 / 透過電子顕微鏡 / 電子後方散乱回折

Research Abstract

The deformation structures of orthopyroxene(Opx) in mylonite rock from Hidaka Metamorphic belt have been investigated mainly using transmission electron microscopy(TEM). Low-angle grain boundaries with the b-axis as the rotation axes and almost parallel to the(001) plane of Opx are common and their atomic structure are varied from coherent to semi-coherent and finally incoherent, depending on the misorientation angle of the boundaries. Asymmetric misfit dislocation densities along the two(100) interfaces between exsolved augite lamella and host Opx were also found, which is probably the origin of the folding of the Opx crystal.

Research Products

• [Journal Article] Electron backscatter diffraction(EBSD) analyses of phyllosilicates in petrographic thin sections (2012)
  • Author(s): Inoue, S. and Kogure, T.
  • Journal Title: American Mineralogist Volume: 97 Pages: 755-758
  • Peer Reviewed
• [Journal Article] Electron backscatter diffraction (EBSD) analyses of phyllosilicates in petrographic thin sections (2012)
  • Author(s): Inoue, S. and Kogure, T
  • Journal Title: Am. Mineral Volume: 97 Issue: 4 Pages: 755-758
  • DOI: 10.2138/am.2012.4061
  • Peer Reviewed
• [Journal Article] Crystal bending, subgrain boundaries development and recrystallization in orthopyroxene during granulite-facies deformation (2011)
  • Author(s): Raimbourg Hugues
  • Journal Title: Contrib.Mineral.Petrol. Volume: 162 Issue: 5 Pages: 1093-1111
  • DOI: 10.1007/s00410-011-0642-3
  • Peer Reviewed
• [Journal Article] Subduction interface processes recorded by eclogite-facies shear zone(Monviso, W. Alpls) (2011)
  • Author(s): Angliboust, S., Aard, P., Raimbourg, H., et al.
  • Journal Title: Lithos Volume: 127 Issue: 1-2 Pages: 222-238
  • DOI: 10.1016/j.lithos.2011.09.004
  • Peer Reviewed
• [Journal Article] Low-grade metamorphism around the down-dip limit of seismorgenic subduction zones : Example from an ancient accretionary complex in the Shimanto Belt, Japan (2011)
  • Author(s): Kameda, J., Raimbourg, H., Kogure, T., et al.
  • Journal Title: Tectonophysics Volume: 502 Issue: 3-4 Pages: 383-392
  • DOI: 10.1016/j.tecto.2011.02.010
  • Peer Reviewed
• [Journal Article] The role of compaction contrasts in sediments in decollement initiation in an accretionary prism (2011)
  • Author(s): Raimbourg, H., Ujiie, K., Kopf, A., Hisamitsu, T., Hamano, Y., Saito, S., Kinoshita, M.
  • Journal Title: Marine Geology Volume: 282 Issue: 3-4 Pages: 188-200
  • DOI: 10.1016/j.margeo.2011.02.011
  • Peer Reviewed
• [Journal Article] Acoustic and mechanical properties of Nankai accretionary prism core samples (2011)
  • Author(s): Raimbourg, H., Y. Hamano, S. Saito, M. Kinoshita, and A. Kopf
  • Journal Title: Geochem. Geophys. Geosyst Volume: 12 Issue: 4 Pages: 4-4
  • DOI: 10.1029/2010gc003169
  • Peer Reviewed
• [Journal Article] Acoustic and mechanical properties of Nankai accretionary prism core samples (2011)
  • Author(s): Raimbourg, H.
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 12
  • Peer Reviewed
• [Journal Article] The role of compaction contrasts in sediments in decollement initiation in an accretionary prism (2011)
  • Author(s): Raimbourg, H.
  • Journal Title: Marine Geology Volume: In press
  • Peer Reviewed
• [Journal Article] Cs-corrected HAADF-STEM imaging of silicate minerals (2010)
  • Author(s): Kogure, T.
  • Journal Title: Journal of Electron Microscopy 60 Pages: 1-9
  • Peer Reviewed
• [Journal Article] Stacking disorder in a sedimentary kaolinite (2010)
  • Author(s): Kogure, T.
  • Journal Title: Clays and Clay Minerals 58 Pages: 63-72
  • NAID: 130005008180
  • Peer Reviewed
• [Journal Article] Horizontal shortening versus vertical loading in accretionary prisms (2009)
  • Author(s): Raimbourg, H.
  • Journal Title: Geochemistry, Geophysics, Geosystems 10 Pages: 1-17
  • Peer Reviewed
• [Journal Article] Structural model of charoite (2009)
  • Author(s): Rozhdestvenskaya I.V.
  • Journal Title: Mineralogical Magazine 73 Pages: 883-890
  • Peer Reviewed
• [Journal Article] Crystal bending, subgrain boundaries development and recrystallization in orthopyroxene during granulite-facies deformation
  • Author(s): Raimbourg, H.
  • Journal Title: Contributions to Mineralogy and Petrology Volume: (accepted)
  • Peer Reviewed
• [Presentation] Crystal folding and recrystallization in naturally deformed orthopyroxene : insights from TEM imaging of subgrain/grain boundary developmen (2011)
  • Author(s): Raimbourg, H., Kogure, T., and Toyoshima, T.
  • Organizer: EGU General Assembly
  • Place of Presentation: EGU General Assembly
  • Year and Date: 2011-04-07
• [Presentation] Structure Nanoanalyses of Specified Regions in Minerals, Rocks and Soils through SEM-FIB-TEM Sequence (2010)
  • Author(s): Kogure, T., Kameda, J., Beaufort, D., and Raimbourg, H.
  • Organizer: 17th IFSM, International Microscopy Congress
  • Place of Presentation: Rio de Janeiro, Brazil
  • Year and Date: 2010-09-21
• [Presentation] Structure Nanoanalyses of Specified Regions in Minerals, Rocks and Soils through SEM-FIB-TEM Sequence (Invited lecture) (2010)
  • Author(s): Kogure, T.
  • Organizer: 17th IFSM International Microscopy Congress
  • Place of Presentation: Windsor Barra Convention Center, Rio de Janeiro, Brazil
  • Year and Date: 2010-09-21
• [Presentation] Novel 2:1 layers formed by dehydroxylating(Fe^<3+>, Mg)-rich dioctahedral mica (2009)
  • Author(s): Kogure, T.
  • Organizer: 25th European Crystallographic Meeting(ECM)
  • Place of Presentation: Istanbul, Turkey
  • Year and Date: 2009-08-19