Strain localization and porphyroclast rotation
2011-02-03

Research Article| March 01, 2011 Strain localization and porphyroclast rotation Albert Griera; Albert Griera * 1Departament de Geologia, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain *E-mail: albert.griera@uab.cat. Search for other works by this author on: GSW Google Scholar Paul D. Bons; Paul D. Bons 2Institut für Geowissenschaften, Eberhard Karls Universität Tübingen, Wilhelmstrasse 56, 72074 Tübingen, Germany Search for other works by this author on: GSW Google Scholar Mark W. Jessell; Mark W. Jessell 3Université de Toulouse, UPS (SVT-OMP) & IRD, LMTG, 14 Avenue Edouard Belin, F-31400 Toulouse, France Search for other works by this author on: GSW Google Scholar Ricardo A. Lebensohn; Ricardo A. Lebensohn 4Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA Search for other works by this author on: GSW Google Scholar Lynn Evans; Lynn Evans 5School of Earth Sciences, University of Melbourne, Melbourne, 3010 Victoria, Australia Search for other works by this author on: GSW Google Scholar Enrique Gomez-Rivas Enrique Gomez-Rivas 2Institut für Geowissenschaften, Eberhard Karls Universität Tübingen, Wilhelmstrasse 56, 72074 Tübingen, Germany Search for other works by this author on: GSW Google Scholar Geology (2011) 39 (3): 275–278. https://doi.org/10.1130/G31549.1 Article history received: 08 Jul 2010 rev-recd: 13 Oct 2010 accepted: 16 Oct 2010 first online: 09 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 Albert Griera, Paul D. Bons, Mark W. Jessell, Ricardo A. Lebensohn, Lynn Evans, Enrique Gomez-Rivas; Strain localization and porphyroclast rotation. Geology 2011;; 39 (3): 275–278. doi: https://doi.org/10.1130/G31549.1 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 SocietyGeology Search Advanced Search Abstract It has been debated for decades whether rigid inclusions, such as porphyroclasts and porphyroblasts, do or do not rotate in a softer matrix during deformation. Experiments and numerical simulations with viscous matrix rheologies show ongoing rotation of circular inclusions, whereas using Mohr-Coulomb plasticity results in nonrotation. Because the rocks in which inclusions are found normally undergo deformation by dislocation creep, we applied a full-field crystal plasticity approach to investigate the rotation behavior of rigid circular inclusions. We show that the inclusion's rotation strongly depends on the anisotropy of the matrix minerals. Strongly anisotropic minerals will develop shear bands that reduce the rotation of inclusions. Inhibition of rotation can only occur after a significant amount of strain. Our results may help to explain why geologic rigid objects often show evidence for rotation, but not necessarily in accordance with the viscous theory that is usually applied to these systems. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.