Table of Contents
Textures and Microstructures
Volume 14 (1991)–18
http://dx.doi.org/10.1155/TSM.14-18.751

Dynamic Recrystallization of a Quartz Porphyroclast

1Department of Earth Sciences, The University, Leeds LS2 9JT, UK
2Badley Ashton and Associates, Winceby House, Winceby, Lincolnshire LN9 6PB, UK

Copyright © 1991 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.

Abstract

Dynamic recrystallization occurs to minimize strain energy via either grain boundary migration or subgrain rotation1,2. Both result in similar microstructures, but whereas in the former new grains have their crystallographic orientation controlled by neighbouring grains, in the latter new grains are derived from the parent grain. We have used the scanning electron microscope (SEM) electron channelling (EC) technique3-7 and the program CHANNEL8 to distinguish the contribution of these processes in a 50% recrystallized quartz porphyroclast (Crinan Grits, Dalradian, SW Highlands, Scotland; 370-400℃)9,10. This grain exhibits a core region of subgrains and a mantle region of neoblast grains (Fig. 1).