Table of Contents
Textures and Microstructures
Volume 6, Issue 2, Pages 105-116

Omphacite Microstructures From a Spanish Eclogite

Mineralogisk–Geologisk Museum, Sarsgaten 1, Oslo 5, Norway

Received 31 October 1983; Accepted 15 May 1984

Copyright © 1984 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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.