Thermal limitations on incorporation of wall rock into magma

Abstract

Research Article| April 01, 2007 Thermal limitations on incorporation of wall rock into magma Allen F. Glazner Allen F. Glazner 1Department 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 Author and Article Information Allen F. Glazner 1Department of Geological Sciences, University of North Carolina, Chapel Hill, North Carolina 27599-3315, USA Publisher: Geological Society of America Received: 29 Jun 2006 Revision Received: 22 Nov 2006 Accepted: 27 Nov 2006 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2007) 35 (4): 319–322. https://doi.org/10.1130/G23134A.1 Article history Received: 29 Jun 2006 Revision Received: 22 Nov 2006 Accepted: 27 Nov 2006 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 Allen F. Glazner; Thermal limitations on incorporation of wall rock into magma. Geology 2007;; 35 (4): 319–322. doi: https://doi.org/10.1130/G23134A.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 Incorporation of solid wall rocks is an oft-cited process in the evolution of magmas, but this process is severely limited by the energy required to dissolve xenoliths. Disaggregation without melting has been proposed as an alternative process for incorporating xenoliths into magma because disaggregation avoids expending the energy required for melting. Analysis of these processes using enthalpy-composition diagrams shows that both processes rapidly lead to high crystal contents in the hybrid magma. For example, incorporation of 25% granite at 400 °C into basalt magma at 1125 °C produces a hybrid magma at 1050 °C with >50% crystals; if the granite disaggregates without melting, the crystal content is 65%–70%. Once the crystal content reaches ∼50% the viscosity of the magma is too high to allow further magma movement or xenolith incorporation. Thus, both processes are self-limiting and probably restricted in natural systems to at most a few tens of percent incorporation of xenoliths. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.