Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4579

Authors: Allard, P.*
Aiuppa, A.*
Burton, M.*
Caltabiano, T.*
Federico, C.*
Salerno, G.*
La Spina, A.*
Editors: Calvari, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia
Inguaggiato, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia
Ripepe, M.; Dipartimento di Scienze della Terra - Universita’ di Firenze, Italia
Puglisi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia
Rosi, M.; Dipartimento di Scienze della Terra, Università degli Studi di Pisa, Pisa, Italy
Title: Crater Gas Emissions and the Magma Feeding System of Stromboli Volcano
Issue Date: 10-Dec-2008
Keywords: Stromboli
magma feeding system
Abstract: Quiescent and explosive magma degassing at Stromboli volcano sustain high temperature crater gas venting and a permanent volcanic plume which constitute key sources of information on the magma supply and dynamics, the physical processes controlling the explosive activity and, more broadly, the volcano feeding system. The chemical composition and the mass output of these crater emissions (gases, trace metals, radioactive isotopes) were measured using different methodologies: within-plume airborne measurements, ground-based plume filtering and/or in situ analysis, remote UV and OP-FTIR absorption spectroscopies. The results obtained, summarized in this paper, demonstrate a primary control of the magmatic gas phase on the eruptive regime and the budget of the volcano. The large excess gas discharge, compared to the lava extrusion rate, and the source depth of slug-driven strombolian explosions evidence extensive separate gas transfer across the volcano conduits, promoted by the high gas content (vesicularity) and then permeability of the shallow basaltic magma. Combined with data for volatiles dissolved in olivine-hosted melt inclusions, the results provide updated constraints for the magma supply rate (~0.3 m3 s-1 on average), the extent of intrusive versus extrusive magma degassing (~15), and the amount of un-erupted degassed magma that should be convectively cycled back in conduits and accumulated beneath the volcano over time (~0.25 km3 in last three decades). The results also provide insight into the possible triggering mechanism of intermittent paroxysmal explosions and the geochemical signals that might allow forecasting these events in future.
Appears in Collections:Book chapters
01.01.07. Volcanic effects

Files in This Item:

File Description SizeFormatVisibility
Allard Stromboli AGU Monograph.pdfmain article561.41 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Share this record
Del.icio.us

Citeulike

Connotea

Facebook

Stumble it!

reddit


 

Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA