Origin of a rhyolite that intruded a geothermal well while drilling at the Krafla volcano, Iceland

Research Article| March 01, 2011 Origin of a rhyolite that intruded a geothermal well while drilling at the Krafla volcano, Iceland Wilfred A. Elders; Wilfred A. Elders * 1Department of Earth Sciences, University of California−Riverside, Riverside, California 92521, USA *E-mail: wilfred.elders@ucr.edu. Search for other works by this author on: GSW Google Scholar Guðmundur Ó Friðleifsson; Guðmundur Ó Friðleifsson 2HS Orka hf, Brekkustigur 36, Reykjanebær IS 260, Iceland Search for other works by this author on: GSW Google Scholar Robert A. Zierenberg; Robert A. Zierenberg 3Department of Geology, University of California−Davis, Davis, California 95616, USA Search for other works by this author on: GSW Google Scholar Emily C. Pope; Emily C. Pope 4Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305, USA Search for other works by this author on: GSW Google Scholar Anette K. Mortensen; Anette K. Mortensen 5Iceland GeoSurvey (ÍSOR), Grensásvegur 9, Reykjavik IS 108, Iceland Search for other works by this author on: GSW Google Scholar Ásgrímur Guðmundsson; Ásgrímur Guðmundsson 6Landsvirkjun Power, Háaleitisbraut 68, Reykjavik, IS 103, Iceland Search for other works by this author on: GSW Google Scholar Jacob B. Lowenstern; Jacob B. Lowenstern 7U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025, USA Search for other works by this author on: GSW Google Scholar Naomi E. Marks; Naomi E. Marks 3Department of Geology, University of California−Davis, Davis, California 95616, USA Search for other works by this author on: GSW Google Scholar Lara Owens; Lara Owens 8Department of Earth and Environmental Sciences, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801, USA Search for other works by this author on: GSW Google Scholar Dennis K. Bird; Dennis K. Bird 4Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305, USA Search for other works by this author on: GSW Google Scholar Mark Reed; Mark Reed 9Department of Geological Sciences, University of Oregon, Eugene, Oregon 97403, USA Search for other works by this author on: GSW Google Scholar Nellie J. Olsen; Nellie J. Olsen 4Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305, USA Search for other works by this author on: GSW Google Scholar Peter Schiffman Peter Schiffman 3Department of Geology, University of California−Davis, Davis, California 95616, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Wilfred A. Elders * 1Department of Earth Sciences, University of California−Riverside, Riverside, California 92521, USA Guðmundur Ó Friðleifsson 2HS Orka hf, Brekkustigur 36, Reykjanebær IS 260, Iceland Robert A. Zierenberg 3Department of Geology, University of California−Davis, Davis, California 95616, USA Emily C. Pope 4Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305, USA Anette K. Mortensen 5Iceland GeoSurvey (ÍSOR), Grensásvegur 9, Reykjavik IS 108, Iceland Ásgrímur Guðmundsson 6Landsvirkjun Power, Háaleitisbraut 68, Reykjavik, IS 103, Iceland Jacob B. Lowenstern 7U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025, USA Naomi E. Marks 3Department of Geology, University of California−Davis, Davis, California 95616, USA Lara Owens 8Department of Earth and Environmental Sciences, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801, USA Dennis K. Bird 4Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305, USA Mark Reed 9Department of Geological Sciences, University of Oregon, Eugene, Oregon 97403, USA Nellie J. Olsen 4Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305, USA Peter Schiffman 3Department of Geology, University of California−Davis, Davis, California 95616, USA *E-mail: wilfred.elders@ucr.edu. Publisher: Geological Society of America Received: 18 May 2010 Revision Received: 06 Oct 2010 Accepted: 07 Oct 2010 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2011 Geological Society of America Geology (2011) 39 (3): 231–234. https://doi.org/10.1130/G31393.1 Article history Received: 18 May 2010 Revision Received: 06 Oct 2010 Accepted: 07 Oct 2010 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 Wilfred A. Elders, Guðmundur Ó Friðleifsson, Robert A. Zierenberg, Emily C. Pope, Anette K. Mortensen, Ásgrímur Guðmundsson, Jacob B. Lowenstern, Naomi E. Marks, Lara Owens, Dennis K. Bird, Mark Reed, Nellie J. Olsen, Peter Schiffman; Origin of a rhyolite that intruded a geothermal well while drilling at the Krafla volcano, Iceland. Geology 2011;; 39 (3): 231–234. doi: https://doi.org/10.1130/G31393.1 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 Magma flowed into an exploratory geothermal well at 2.1 km depth being drilled in the Krafla central volcano in Iceland, creating a unique opportunity to study rhyolite magma in situ in a basaltic environment. The quenched magma is a partly vesicular, sparsely phyric, glass containing ∼1.8% of dissolved volatiles. Based on calculated H2O-CO2 saturation pressures, it degassed at a pressure intermediate between hydrostatic and lithostatic, and geothermometry indicates that the crystals in the melt formed at ∼900 °C. The glass shows no signs of hydrothermal alteration, but its hydrogen and oxygen isotopic ratios are much lower than those of typical mantle-derived magmas, indicating that this rhyolite originated by anhydrous mantle-derived magma assimilating partially melted hydrothermally altered basalts. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.