Abstract
The microstructures of some naturally deformed clinopyroxenes from the Betic Cordilleras southern Spain are described in some detail. The PT conditions at the time of deformation are estimated to be 12 kb and 500℃. Optical and TEM studies indicate that deformation takes place essentially by conservative slip on {hk0} [001] to produce lattice bending and kinking, whilst minor contributions from dislocation creep occur. Slip is accompanied by extensive grain and kink band boundary migration leading locally to recrystallisation. Additional defect structures are inhomogeneously distributed anti‐phase domains, typically of 2 sizes, 0.03 and 0.3–1 μm.
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