Magma chamber of the Campi Flegrei supervolcano at the time of eruption of the Campanian Ignimbrite

Abstract

Research Article| November 01, 2006 Magma chamber of the Campi Flegrei supervolcano at the time of eruption of the Campanian Ignimbrite Paola Marianelli; Paola Marianelli 1Dipartimento di Scienze della Terra, Università degli Studi di Pisa, via Santa Maria 53,\ 56126 Pisa, Italy Search for other works by this author on: GSW Google Scholar Alessandro Sbrana; Alessandro Sbrana 1Dipartimento di Scienze della Terra, Università degli Studi di Pisa, via Santa Maria 53,\ 56126 Pisa, Italy Search for other works by this author on: GSW Google Scholar Monica Proto Monica Proto 1Dipartimento di Scienze della Terra, Università degli Studi di Pisa, via Santa Maria 53,\ 56126 Pisa, Italy Search for other works by this author on: GSW Google Scholar Geology (2006) 34 (11): 937–940. https://doi.org/10.1130/G22807A.1 Article history received: 13 Mar 2006 rev-recd: 31 May 2006 accepted: 07 Jun 2006 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 Paola Marianelli, Alessandro Sbrana, Monica Proto; Magma chamber of the Campi Flegrei supervolcano at the time of eruption of the Campanian Ignimbrite. Geology 2006;; 34 (11): 937–940. doi: https://doi.org/10.1130/G22807A.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 A supereruption that occurred in the Campi Flegrei area, Italy, ca. 39 ka had regional- and global-scale environmental impacts and deposited the Campanian Ignimbrite (CI). We attempt to shed light on critical aspects of the eruption (depth of magma chamber, intensive pre-eruptive magma conditions) and the large-volume magma plumbing system on the basis of information derived from analyzing melt inclusion (MI) data. To achieve these aims, we provide new measurements of homogenization temperatures and values of dissolved H2O within phenocryst-hosted MIs from pumices erupted during different phases of the CI eruption. The MI data indicate that a relatively homogeneous overheated trachytic magma resided within a relatively deep magma chamber. Dissolved water contents in MIs indicate that prior to the eruption the magma chamber underwent radical changes related to differential upward movement of magma. Decompression of the rising trachytic magma caused a decrease in water solubility and crystallization, and trachytic bodies were emplaced at very shallow depths. The proposed eruptive model links portions of the main magma chamber and apophyses with specific eruptive units. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.