Volume 20, Issue 2 (6-2012)                   www.ijcm.ir 2012, 20(2): 25-32 | Back to browse issues page

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Microstructural analysis of quartz crystals in an andalusite-cordierite schist using electron backscatter diffraction. www.ijcm.ir 2012; 20 (2) :25-32
URL: http://ijcm.ir/article-1-389-en.html
Abstract:   (2818 Views)

The present study investigates the shape preferred orientation (SPO) and crystal preferred orientation (CPO) of quartz crystals using electron backscatter diffraction (EBSD) in andalusite-cordierite schist from the Ythan Valley, Aberdeenshire, in the Scottish Dalradian block. Quartz crystals in the matrix and andalusite pophyroblasts have inequant to slightly equant shapes. Quartz crystals show weak SPO in the matrix and andalusite pophyroblasts, which are sub-parallel to each other.  The weak SPO in quartz crystals of the studied sample can be related to (1) Grain boundary migration of quartz crystals and (2) non-quartz crystals (e.g. mica) at junction of quartz crystals. Also, quartz crystals show random CPO in the matrix and inclusion. The lack of CPO of quartz crystals in the matrix can be explained by (i) absence, or low amounts of strain in the rock that is experienced only low temperature and pressure and (ii) diffusion creep. The random crystallographic orientation of quartz inclusions may confirm non-selective orientations of the matrix quartz crystals by andalusite pophyroblast during growth.

Full-Text [PDF 71 kb]   (1006 Downloads)    
Type of Study: Research | Subject: Special

Add your comments about this article : Your username or Email:
CAPTCHA

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2024 CC BY-NC 4.0 | Iranian Journal of Crystallography and Mineralogy

Designed & Developed by : Yektaweb