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EBSD analysis of plagioclase in pure shear experiments

Various CPO* patterns are formed in rocks depending on deformation and flow conditions
* CPO (crystallographic preferred orientation)
→ key to estimating the state of the Earth's interior

　Plagioclase (Anorthite, CaAl2Si2O8) was used to perform pure shear experiments.As a result of structural analysis of the specimen after deformation, it was found that olivine (Mg2SiO4), we confirmed the development of crystallographic orientation (CPO) under diffusion creep (Miyazaki et al. 2013; Maruyama and Hiraga, 2017).

EBSD analysis of plagioclase in pure shear experiments
Figure: Pure shear deformation experiment of anorthite polycrystals
(a) Schematic diagram of the deformation experiment, (b) EBSD mapping in the XZ plane of the deformed sample and (c) polar diagram.The (010) planes of plagioclase are oriented parallel to the X-axis direction.The arrows in the figure indicate the direction of deformation.