Deformed sedimentary fabrics in metamorphic rocks: Evidence from the Point Lake area, Slave province, Northwest Territories

Research Article| April 01, 1991 Deformed sedimentary fabrics in metamorphic rocks: Evidence from the Point Lake area, Slave province, Northwest Territories TIMOTHY M. KUSKY; TIMOTHY M. KUSKY 1Department of Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, Maryland 21218 Search for other works by this author on: GSW Google Scholar DECLAN G. DE PAOR DECLAN G. DE PAOR 1Department of Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, Maryland 21218 Search for other works by this author on: GSW Google Scholar Author and Article Information TIMOTHY M. KUSKY 1Department of Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, Maryland 21218 DECLAN G. DE PAOR 1Department of Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, Maryland 21218 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1991) 103 (4): 486–503. https://doi.org/10.1130/0016-7606(1991)103<0486:DSFIMR>2.3.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation TIMOTHY M. KUSKY, DECLAN G. DE PAOR; Deformed sedimentary fabrics in metamorphic rocks: Evidence from the Point Lake area, Slave province, Northwest Territories. GSA Bulletin 1991;; 103 (4): 486–503. doi: https://doi.org/10.1130/0016-7606(1991)103<0486:DSFIMR>2.3.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 The Point Lake orogenic belt in the Archean Slave province of Canada contains deformed metasedimentary rocks ranging from greenschist to granulite facies. At low grade, combinations of simple shear, pure shear, and initial lamina shape form a wide geometric variety of strained cross-laminae. At higher metamorphic grades, deformed sedimentary structures are recrystallized and in places included in porphyroblasts as internal foliations or inclusion trails. Different manifestations of deformed sedimentary layering produce textures resembling early-differentiated tectonic foliations. Recognition of the reorientation of sedimentary structures and their progressive incorporation into porphyroblasts greatly simplifies the structural history of the Slave province; previous models invoked as many as ten structural events to account for observed fabrics and inclusion trails, whereas the model presented herein requires only two. 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.