Gas-driven filter pressing in magmas

Research Article| July 01, 1999 Gas-driven filter pressing in magmas T. W. Sisson; T. W. Sisson 1U.S. Geological Survey, Volcano Hazards Team, MS-910, 345 Middlefield Road, Menlo Park, California 94025, USA Search for other works by this author on: GSW Google Scholar C. R. Bacon C. R. Bacon 1U.S. Geological Survey, Volcano Hazards Team, MS-910, 345 Middlefield Road, Menlo Park, California 94025, USA Search for other works by this author on: GSW Google Scholar Author and Article Information T. W. Sisson 1U.S. Geological Survey, Volcano Hazards Team, MS-910, 345 Middlefield Road, Menlo Park, California 94025, USA C. R. Bacon 1U.S. Geological Survey, Volcano Hazards Team, MS-910, 345 Middlefield Road, Menlo Park, California 94025, USA Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1999) 27 (7): 613–616. https://doi.org/10.1130/0091-7613(1999)027<0613:GDFPIM>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation T. W. Sisson, C. R. Bacon; Gas-driven filter pressing in magmas. Geology 1999;; 27 (7): 613–616. doi: https://doi.org/10.1130/0091-7613(1999)027<0613:GDFPIM>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 SocietyGeology Search Advanced Search Abstract Most silicic and some mafic magmas expand via second boiling if they crystallize at depths of about 10 km or less. The buildup of gas pressure due to second boiling can be relieved by expulsion of melt out of the region of crystallization, and this process of gas-driven filter pressing assists the crystallization differentiation of magmas. For gas-driven filter pressing to be effective, the region of crystallization must inflate slowly relative to buildup of pressure and expulsion of melt. These conditions are satisfied in undercooled magmatic inclusions and in thin sheets of primitive magma underplating cooler magma reservoirs. Gas-driven filter pressing thereby adds fractionated melt to magma bodies. Gas-driven filter pressing is probably the dominant process by which highly evolved melts segregate from crystal mush to form aplitic dikes in granitic plutons; this process could also account for the production of voluminous, crystal-poor rhyolites. 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.