Preferred Orientation in Quartz Ribbon Mylonites

Research Article| July 01, 1975 Preferred Orientation in Quartz Ribbon Mylonites C.J.L. WILSON C.J.L. WILSON 1School of Earth Sciences, Department of Geology, University of Melbourne, Parkville, Victoria 3052, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information C.J.L. WILSON 1School of Earth Sciences, Department of Geology, University of Melbourne, Parkville, Victoria 3052, Australia Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1975) 86 (7): 968–974. https://doi.org/10.1130/0016-7606(1975)86<968:POIQRM>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation C.J.L. WILSON; Preferred Orientation in Quartz Ribbon Mylonites. GSA Bulletin 1975;; 86 (7): 968–974. doi: https://doi.org/10.1130/0016-7606(1975)86<968:POIQRM>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Quartz mylonites composed of elongate ribbon quartz without appreciable recrystallization at grain boundaries were examined and contrasted. One was from a lower greenschist facies environment at Mount Isa, Australia, in which the c-axis preferred orientation of the ribbons is either a pronounced orthorhombic distribution or a small-circle distribution (with a small opening angle) about the normal to the foliation and lineation. The other was an upper greenschist or lower amphibolite facies mylonite from Risfjället in the Swedish Caledonides, in which the c-axis preferred orientation of the ribbon is a maximum lying close to the foliation and normal to the lineation. Variation in preferred orientation can be accounted for by temperature and (or) strain-rate differences, with basal-slip mechanisms predominant at lower temperatures and prismatic slip (and possibly other slip systems), together with diffusion-controlled processes, predominant at higher temperatures. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.