Partial-melt topology in statically and dynamically recrystallized granite

Abstract

Research Article| January 01, 2000 Partial-melt topology in statically and dynamically recrystallized granite C. L. Rosenberg; C. L. Rosenberg 1Institut für Geowissenschaften, Senckenbergstrasse 3, 35390 Giessen, Germany Search for other works by this author on: GSW Google Scholar U. Riller U. Riller 2GeoForschungsZentrum Potsdam, Telegrafenberg C223, 14473 Potsdam, Germany Search for other works by this author on: GSW Google Scholar Author and Article Information C. L. Rosenberg 1Institut für Geowissenschaften, Senckenbergstrasse 3, 35390 Giessen, Germany U. Riller 2GeoForschungsZentrum Potsdam, Telegrafenberg C223, 14473 Potsdam, Germany Publisher: Geological Society of America Received: 22 Apr 1999 Revision Received: 02 Aug 1999 Accepted: 11 Aug 1999 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2000) 28 (1): 7–10. https://doi.org/10.1130/0091-7613(2000)28<7:PTISAD>2.0.CO;2 Article history Received: 22 Apr 1999 Revision Received: 02 Aug 1999 Accepted: 11 Aug 1999 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation C. L. Rosenberg, U. Riller; Partial-melt topology in statically and dynamically recrystallized granite. Geology 2000;; 28 (1): 7–10. doi: https://doi.org/10.1130/0091-7613(2000)28<7:PTISAD>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 SocietyGeology Search Advanced Search Abstract Microstructures of the Murray granite pluton (central Ontario, Canada) show evidence of both static and dynamic crystallization subsequent to partial melting. Backscattered electron analyses reveal interstitial K-feldspar and plagioclase at triple junctions of strain-free, isometric quartz grains. The geometry of the quartz-feldspar boundaries mimics the original topology of the quartz-melt contacts during crystallization. This conclusion is suggested by the occurrence of both rounded and planar faces of quartz grains, and by low (27°) dihedral angles of quartz-quartz-feldspar boundaries, similar to dihedral angles in experimentally crystallized quartz-quartz-silicic melt systems. In contrast, feldspar seams in deformed granites have high axial ratios, are usually elongated perpendicular to the foliation plane, and are located preferentially along individual grain boundaries. Quartz grains are dynamically recrystallized and occasionally transected by feldspar seams, indicating that fracturing occurred in the presence of melt during crystal-plastic deformation of quartz. The subparallel orientation in quartz grains of intragranular, feldspar-bearing fractures and interstitial feldspar seams suggests that these features originated as intragranular and intergranular fractures, respectively. Partial-melt topology was therefore controlled by intergranular and, occasionally, by intragranular fracturing. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.