Title: Stability and instability of quiescently active volcanoes: The case of Masaya, Nicaragua
Abstract: Research Article| June 01, 2007 Stability and instability of quiescently active volcanoes: The case of Masaya, Nicaragua John Stix John Stix 1Department of Earth & Planetary Sciences, McGill University, 3450 University Street, Montreal, Quebec H3A 2A7, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information John Stix 1Department of Earth & Planetary Sciences, McGill University, 3450 University Street, Montreal, Quebec H3A 2A7, Canada Publisher: Geological Society of America Received: 14 Jul 2006 Revision Received: 29 Jan 2007 Accepted: 04 Feb 2007 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2007) 35 (6): 535–538. https://doi.org/10.1130/G23198A.1 Article history Received: 14 Jul 2006 Revision Received: 29 Jan 2007 Accepted: 04 Feb 2007 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 John Stix; Stability and instability of quiescently active volcanoes: The case of Masaya, Nicaragua. Geology 2007;; 35 (6): 535–538. doi: https://doi.org/10.1130/G23198A.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 Quiescently active volcanoes are enigmatic due to their restlessness but lack of eruptive activity. I present a model of coupled conduit convection and foam accumulation to explain degassing behavior of Masaya, an active volcano in Nicaragua that is currently emitting large amounts of gas but not erupting. Gas-rich magma is transported through a conduit 2–6 m in radius and then released into a shallow reservoir. The magma is degassed in the reservoir and forms a foam 1–3 m thick at the top with bubbles 20–60 µm in diameter. The foam layer is stable because the input of gas into the foam is balanced by gas release through a vent to the surface. If the foam layer is destabilized, the volcano can erupt explosively. The most likely cause of foam destabilization is a large injection of volatile-rich magma from deeper levels into the shallow conduit-reservoir system, thereby increasing magma fluxes and gas fluxes, exsolving large gas bubbles, and reducing surface tension of the magma. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 41
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