Deformation Mechanics of Mylonitic Rocks and Fractured Granites in Cobequid Mountains, Nova Scotia, Canada

Abstract

Research Article| July 01, 1970 Deformation Mechanics of Mylonitic Rocks and Fractured Granites in Cobequid Mountains, Nova Scotia, Canada G. H EISBACHER G. H EISBACHER Geological Survey of Canada, Vancouver, British Columbia, Canada Search for other works by this author on: GSW Google Scholar GSA Bulletin (1970) 81 (7): 2009–2020. https://doi.org/10.1130/0016-7606(1970)81[2009:DMOMRA]2.0.CO;2 Article history received: 08 Dec 1969 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation G. H EISBACHER; Deformation Mechanics of Mylonitic Rocks and Fractured Granites in Cobequid Mountains, Nova Scotia, Canada. GSA Bulletin 1970;; 81 (7): 2009–2020. doi: https://doi.org/10.1130/0016-7606(1970)81[2009:DMOMRA]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 Mylonitization in the southern part of the Cobequid Mountains resulted from deformation of igneous and sedimentary rocks during the Devonian Acadian orogeny. Detailed analyses of mineral lineation, penetrative s-surfaces, and mineral grain fabrics suggest that uniform tectonic flow within the mylonite zone produced rock strains with extension parallel to the mineral lineation. Quartz fabrics originated when large quartz crystals deformed into elongate granular aggregates. A regional compression axis, inferred from a laminar flow model for the mylonite zone, is compatible with a compression axis derived from slickensided fractures in granitic rocks north of the mylonite zone. The subhorizontal, southeasterly trending compression axes are perpendicular to the regional trend of the Appalachians mountain chain in Nova Scotia. 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.