Repeated fracture and healing of silicic magma generate flow banding and earthquakes?

Abstract

Research Article| December 01, 2003 Repeated fracture and healing of silicic magma generate flow banding and earthquakes? Hugh Tuffen; Hugh Tuffen 1 Department of Earth and Environmental Sciences, University of Munich, Theresienstraße 41, D-80333 Munich, Germany Search for other works by this author on: GSW Google Scholar Donald B. Dingwell; Donald B. Dingwell 1 Department of Earth and Environmental Sciences, University of Munich, Theresienstraße 41, D-80333 Munich, Germany Search for other works by this author on: GSW Google Scholar Harry Pinkerton Harry Pinkerton 2Department of Environmental Science, Lancaster University, Lancaster LA1 4YQ, UK Search for other works by this author on: GSW Google Scholar Author and Article Information Hugh Tuffen 1 Department of Earth and Environmental Sciences, University of Munich, Theresienstraße 41, D-80333 Munich, Germany Donald B. Dingwell 1 Department of Earth and Environmental Sciences, University of Munich, Theresienstraße 41, D-80333 Munich, Germany Harry Pinkerton 2Department of Environmental Science, Lancaster University, Lancaster LA1 4YQ, UK Publisher: Geological Society of America Received: 25 Apr 2003 Revision Received: 26 Jun 2003 Accepted: 14 Aug 2003 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2003) 31 (12): 1089–1092. https://doi.org/10.1130/G19777.1 Article history Received: 25 Apr 2003 Revision Received: 26 Jun 2003 Accepted: 14 Aug 2003 First Online: 02 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 Hugh Tuffen, Donald B. Dingwell, Harry Pinkerton; Repeated fracture and healing of silicic magma generate flow banding and earthquakes?. Geology 2003;; 31 (12): 1089–1092. doi: https://doi.org/10.1130/G19777.1 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 Textures in an exceptionally preserved effusive rhyolite conduit at Torfajökull, Iceland, indicate that rising magma repeatedly fractured and healed at shallow levels in the conduit (RFH process). Anastomosing tuffisite veins filled by fine-grained juvenile clasts were generated by shear fracture of highly viscous magma in the glass transition interval. Welding of the particulate material during subsequent deformation led to thorough healing of veins, allowing repeated fracture of the same body of magma. We propose that the RFH process is a rechargeable trigger mechanism for hybrid seismicity and show that the time scale of the process and the fractures formed by it are consistent with the repeat time and magnitude of hybrid earthquakes during silicic eruptions. The RFH process may also form the flow banding that is nearly ubiquitous in obsidian. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.