Experimental evidence for crystal coarsening and fabric development during temperature cycling

Abstract

Research Article| December 01, 2011 Experimental evidence for crystal coarsening and fabric development during temperature cycling Ryan D. Mills; Ryan D. Mills Department of Geological Sciences, University of North Carolina, Chapel Hill, North Carolina 27599-3315, USA Search for other works by this author on: GSW Google Scholar Jacqueline J. Ratner; Jacqueline J. Ratner Department of Geological Sciences, University of North Carolina, Chapel Hill, North Carolina 27599-3315, USA Search for other works by this author on: GSW Google Scholar Allen F. Glazner Allen F. Glazner Department of Geological Sciences, University of North Carolina, Chapel Hill, North Carolina 27599-3315, USA Search for other works by this author on: GSW Google Scholar Geology (2011) 39 (12): 1139–1142. https://doi.org/10.1130/G32394.1 Article history received: 26 Apr 2011 rev-recd: 07 Jul 2011 accepted: 10 Jul 2011 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Ryan D. Mills, Jacqueline J. Ratner, Allen F. Glazner; Experimental evidence for crystal coarsening and fabric development during temperature cycling. Geology 2011;; 39 (12): 1139–1142. doi: https://doi.org/10.1130/G32394.1 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 Oscillating temperature dramatically speeds up recrystallization of a magma analog consisting of ammonium thiocyanate and ammonium chloride crystals in liquid. Linear growth rates increase by a factor of 10 if temperature is oscillated up and down a few degrees (e.g., 47 ± 3 °C) relative to nominally static conditions. Crystals pulse in size during thermal cycling; over the course of hundreds of cycles larger crystals grow and smaller crystals shrink, dramatically skewing the crystal size distribution. Crystal dissolution and growth in a pulsing thermal gradient produces a pronounced fabric, with crystals of ammonium thiocyanate aligned subparallel to the direction of heat flow. Alignment occurs via selective dissolution and growth of crystals of diverse orientations inherited from the starting material. These results have important implications for understanding how crystals grow and for interpreting texture in igneous rocks. Temperature cycling is likely common in magmatic systems and needs to be considered when analyzing chemical zoning of igneous crystals and rock textures. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.