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Dislocation microstructures in majorite garnet experimentally deformed in the multi-anvil apparatus

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Published/Copyright: April 2, 2015
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American Mineralogist
From the journal American Mineralogist Volume 96 Issue 4

Abstract

Majorite garnets with the composition Mj70Py30 have been deformed in the multi-anvil apparatus at 17 GPa and 2000 °C. The microstructure has been characterized by transmission electron microscopy. It is shown that under these conditions majorite garnet is ductile. Dislocations with <100> and ½<111> Burgers vectors are observed with a density 1-5 × 1012 m−2. The absence of clear glide planes and the occurrence of subgrain boundaries suggest the importance of diffusion and climb in the plasticity of majorite garnets in mantle transition zone conditions.

Keywords : Majorite; garnet; dislocations; multi-anvil apparatus; transmission electron microscopy
Received: 2010-8-10
Accepted: 2010-10-26
Published Online: 2015-4-2
Published in Print: 2011-4-1

© 2015 by Walter de Gruyter Berlin/Boston

Articles in the same Issue

  1. Roebling Medal Lecture. The three partners of metamorphic petrology
  2. Relationship between structure, morphology, and carbon isotopic composition of graphite in marbles: Implications for calcite-graphite carbon isotope thermometry
  3. Crystal structure, mosaicity, and strain analysis of Hawaiian olivines using in situ X-ray diffraction
  4. Characterization of deep weathering and nanoporosity development in shale—A neutron study
  5. Structural water in ferrihydrite and constraints this provides on possible structure models
  6. Critical evaluation of the revised akdalaite model for ferrihydrite
  7. Neutron diffraction study of hydrogen in birnessite structures
  8. Pressless split-sphere apparatus equipped with scaled-up Kawai-cell for mineralogical studies at 10–20 GPa
  9. Dislocation microstructures in majorite garnet experimentally deformed in the multi-anvil apparatus
  10. Density of carbonated peridotite magma at high pressure using an X-ray absorption method
  11. Stability and bulk modulus of Ni3S, a new nickel sulfur compound, and the melting relations of the system Ni-NiS up to 10 GPa
  12. Far-infrared spectra of synthetic [4][(Al2-xGax)(Si2–yGey)](OH,OD,F)2-kinoshitalite: Characterization and assignment of interlayer Ba-Oinner and Ba-Oouter stretching bands
  13. High-temperature elasticity of polycrystalline orthoenstatite (MgSiO3)
  14. Anatomy of a metabentonite: Nucleation and growth of illite crystals and their coalescence into mixed-layer illite/smectite
  15. Zn-O tetrahedral bond length variations in normal spinel oxides
  16. A new thermodynamic analysis of the intergrowth of hedenbergite and magnetite with Ca-Fe-rich olivine
  17. Raman spectroscopic investigations of some Tl-sulfosalt minerals containing pyramidal (As,Sb)S3 groups
  18. A first record of strong structural relaxation of TO4 tetrahedra in a spinel solid solution
  19. The high-pressure behavior of orthorhombic amphiboles
  20. XAS determination of the Fe local environment and oxidation state in phonolite glasses
  21. Chemical variation and significance of micas from the Fregeneda-Almendra pegmatitic field (Central-Iberian Zone, Spain and Portugal)
  22. Light-induced molecular change in HgI2·As4S4: Evidence by single-crystal X-ray diffraction and Raman spectroscopy
  23. Low-temperature electron paramagnetic resonance studies on natural calumetite from Khetri copper mine, Rajasthan, India
  24. Chromatite and its Cr3+- and Cr6+-bearing precursor minerals from the Nabi Musa Mottled Zone complex, Judean Desert
  25. Hazenite, KNaMg2(PO4)2⋅14H2O, a new biologically related phosphate mineral, from Mono Lake, California, U.S.A.
  26. The fractional latent heat of crystallizing magmas
https://doi.org/10.2138/am.2011.3671
Keywords for this article
Majorite; garnet; dislocations; multi-anvil apparatus; transmission electron microscopy

Articles in the same Issue

  1. Roebling Medal Lecture. The three partners of metamorphic petrology
  2. Relationship between structure, morphology, and carbon isotopic composition of graphite in marbles: Implications for calcite-graphite carbon isotope thermometry
  3. Crystal structure, mosaicity, and strain analysis of Hawaiian olivines using in situ X-ray diffraction
  4. Characterization of deep weathering and nanoporosity development in shale—A neutron study
  5. Structural water in ferrihydrite and constraints this provides on possible structure models
  6. Critical evaluation of the revised akdalaite model for ferrihydrite
  7. Neutron diffraction study of hydrogen in birnessite structures
  8. Pressless split-sphere apparatus equipped with scaled-up Kawai-cell for mineralogical studies at 10–20 GPa
  9. Dislocation microstructures in majorite garnet experimentally deformed in the multi-anvil apparatus
  10. Density of carbonated peridotite magma at high pressure using an X-ray absorption method
  11. Stability and bulk modulus of Ni3S, a new nickel sulfur compound, and the melting relations of the system Ni-NiS up to 10 GPa
  12. Far-infrared spectra of synthetic [4][(Al2-xGax)(Si2–yGey)](OH,OD,F)2-kinoshitalite: Characterization and assignment of interlayer Ba-Oinner and Ba-Oouter stretching bands
  13. High-temperature elasticity of polycrystalline orthoenstatite (MgSiO3)
  14. Anatomy of a metabentonite: Nucleation and growth of illite crystals and their coalescence into mixed-layer illite/smectite
  15. Zn-O tetrahedral bond length variations in normal spinel oxides
  16. A new thermodynamic analysis of the intergrowth of hedenbergite and magnetite with Ca-Fe-rich olivine
  17. Raman spectroscopic investigations of some Tl-sulfosalt minerals containing pyramidal (As,Sb)S3 groups
  18. A first record of strong structural relaxation of TO4 tetrahedra in a spinel solid solution
  19. The high-pressure behavior of orthorhombic amphiboles
  20. XAS determination of the Fe local environment and oxidation state in phonolite glasses
  21. Chemical variation and significance of micas from the Fregeneda-Almendra pegmatitic field (Central-Iberian Zone, Spain and Portugal)
  22. Light-induced molecular change in HgI2·As4S4: Evidence by single-crystal X-ray diffraction and Raman spectroscopy
  23. Low-temperature electron paramagnetic resonance studies on natural calumetite from Khetri copper mine, Rajasthan, India
  24. Chromatite and its Cr3+- and Cr6+-bearing precursor minerals from the Nabi Musa Mottled Zone complex, Judean Desert
  25. Hazenite, KNaMg2(PO4)2⋅14H2O, a new biologically related phosphate mineral, from Mono Lake, California, U.S.A.
  26. The fractional latent heat of crystallizing magmas
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