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Deformation of diopside single crystals at mantle pressure; TEM characterization of dislocation microstructures

Elodie Amiguet, Patrick Cordier and Paul Raterron
Deformation of diopside single crystals at mantle pressure; TEM characterization of dislocation microstructures
European Journal of Mineralogy (March 2010) 22 (2): 181-187

Abstract

The dislocation microstructures of diopside single crystals deformed at high-pressure (4< or =P< or =9 GPa), high-temperature (1100 degrees < or =T< or =1400 degrees C) using a Deformation-DIA high-pressure apparatus (D-DIA) have been characterized by transmission electron microscopy using weak-beam dark-field (WBDF), precession electron diffraction (PED), large-angle convergent-beam electron diffraction (LACBED) and the thickness-fringe method. Dislocation glide is the dominant deformation mechanism under these conditions. The 1/2<110>{110} glide is controlled by lattice friction on the edge segments and shows extensive cross-slip. The [001] glide occurs mostly on {110}; no evidence for [001](010) glide has been found. The [100] dislocations bear a strong lattice friction probably due to complex (out of glide) core structures.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 22
Serial Issue: 2
Title: Deformation of diopside single crystals at mantle pressure; TEM characterization of dislocation microstructures
Affiliation: Universite de Lille I, Laboratoire de Structure et Proprietes de l'Etat Solide, Villeneuve d'Ascq, France
Pages: 181-187
Published: 201003
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 29
Accession Number: 2010-039531
Categories: Geophysics of minerals and rocks
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201022
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