Quantitative model for magma degassing and ground deformation (bradyseism) at Campi Flegrei, Italy: Implications for future eruptions

Abstract

Research Article| September 01, 2007 Quantitative model for magma degassing and ground deformation (bradyseism) at Campi Flegrei, Italy: Implications for future eruptions Robert J. Bodnar; Robert J. Bodnar 1Department of Geosciences, Virginia Polytechnic Institute and State University, 4044 Derring Hall, Blacksburg, Virginia 24061, USA Search for other works by this author on: GSW Google Scholar Claudia Cannatelli; Claudia Cannatelli 1Department of Geosciences, Virginia Polytechnic Institute and State University, 4044 Derring Hall, Blacksburg, Virginia 24061, USA Search for other works by this author on: GSW Google Scholar Benedetto De Vivo; Benedetto De Vivo 2Dipartimento di Scienze della Terra, Università di Napoli Federico II, Via Mezzocannone, 8–80138 Napoli, Italy Search for other works by this author on: GSW Google Scholar Annamaria Lima; Annamaria Lima 2Dipartimento di Scienze della Terra, Università di Napoli Federico II, Via Mezzocannone, 8–80138 Napoli, Italy Search for other works by this author on: GSW Google Scholar Harvey E. Belkin; Harvey E. Belkin 3U.S. Geological Survey, 956 National Center, Reston, Virginia 20192, USA Search for other works by this author on: GSW Google Scholar Alfonsa Milia Alfonsa Milia 4Istituto Ambiente Marino Costiero, CNR, Calata Porta di Massa, Porto di Napoli 80133, Italy Search for other works by this author on: GSW Google Scholar Author and Article Information Robert J. Bodnar 1Department of Geosciences, Virginia Polytechnic Institute and State University, 4044 Derring Hall, Blacksburg, Virginia 24061, USA Claudia Cannatelli 1Department of Geosciences, Virginia Polytechnic Institute and State University, 4044 Derring Hall, Blacksburg, Virginia 24061, USA Benedetto De Vivo 2Dipartimento di Scienze della Terra, Università di Napoli Federico II, Via Mezzocannone, 8–80138 Napoli, Italy Annamaria Lima 2Dipartimento di Scienze della Terra, Università di Napoli Federico II, Via Mezzocannone, 8–80138 Napoli, Italy Harvey E. Belkin 3U.S. Geological Survey, 956 National Center, Reston, Virginia 20192, USA Alfonsa Milia 4Istituto Ambiente Marino Costiero, CNR, Calata Porta di Massa, Porto di Napoli 80133, Italy Publisher: Geological Society of America Received: 08 Jan 2007 Revision Received: 20 Apr 2007 Accepted: 26 Apr 2007 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 The Geological Society of America, Inc. Geology (2007) 35 (9): 791–794. https://doi.org/10.1130/G23653A.1 Article history Received: 08 Jan 2007 Revision Received: 20 Apr 2007 Accepted: 26 Apr 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 Robert J. Bodnar, Claudia Cannatelli, Benedetto De Vivo, Annamaria Lima, Harvey E. Belkin, Alfonsa Milia; Quantitative model for magma degassing and ground deformation (bradyseism) at Campi Flegrei, Italy: Implications for future eruptions. Geology 2007;; 35 (9): 791–794. doi: https://doi.org/10.1130/G23653A.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 Campi Flegrei (Phlegrean Fields) is an active volcanic center near Naples, Italy. Numerous eruptions have occurred here during the Quaternary, and repeated episodes of slow vertical ground movement (bradyseism) have been documented since Roman times. Here, we present a quantitative model that relates deformation episodes to magma degassing and fracturing at the brittle-ductile transition in a magmatic-hydrothermal environment. The model is consistent with field and laboratory observations and predicts that uplift between 1982 and 1984 was associated with crystallization of ∼0.83 km3 of H2O-saturated magma at 6 km depth. During crystallization, ∼6.2 × 1010 kg of H2O and 7.5 × 108 kg of CO2 exsolved from the magma and generated ∼7 × 1015 J of mechanical (PΔV) energy to drive the observed uplift. For comparison, ∼1017 J of thermal energy was released during the 18 May 1980 lateral blast at Mount St. Helens. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.