Table of Contents
Textures and Microstructures
Volume 29, Issue 3-4, Pages 185-199
http://dx.doi.org/10.1155/TSM.29.185

Texture Analysis of Quartz in a Granite Mylonite by EBSP-Orientation Imaging Microscopy

1Department of Geology and Geophysics, University of California, Berkeley CA 94720-4767, USA
2ESRF, B.P. 220 F-38043, Grenoble, France

Received 20 November 1996

Copyright © 1997 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

The crystallographic preferred orientation (texture) of the quartz phase in a mylonitic leucogranite from the Santa Rosa mylonite zone was investigated using automated analysis of electron backscattering patterns (EBSP) in the scanning electron microscope (SEM). The separation of the quartz diffraction patterns from patterns of other constituents (feldspar, mica, etc.) in this polymineralic rock was achieved using an image quality parameter. The quartz phase displays a texture typical for high temperature mylonites (c-axis maximum in the intermediate strain direction). The misorientation distribution between next neighbors is dominated by Dauphiné twins.