Microstructure, CPO, and shear-wave anisotropy of shear-deformed δ-AlOOH (IMAGE)

Ehime University

Microstructure, CPO, and shear-wave anisotropy of shear-deformed δ-AlOOH

Caption

Images show the (a) shear deformation cell assembly and (b) microstructure of a shear-deformed δ-AlOOH aggregate deformed at 20 GPa and 950 °C, corresponding to lower mantle transition zone conditions. Large rotation of the strain marker indicates large shear strain in the sample. (c) CPO pole figures show that the (010) lattice plane preferentially aligns parallel to the shear plane after deformation, whereas [001] aligns subparallel to the shear direction. (d) Shear-wave anisotropy and polarization directions (white dashes) of the faster shear-wave velocity in the shear-deformed δ-AlOOH aggregate.

Credit

Wentian Wu

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