Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/6712
DC Field | Value | Language |
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dc.contributor.authorall | Métrich, N.; Laboratoire Pierre Süe, UMR9956, CNRS-CEA, Ce-Saclay, France; Istituto Nazionale Di Geofisica e Vulcanologia, Pisa, Italy | en |
dc.contributor.authorall | Bertagnini, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia | en |
dc.contributor.authorall | Di Muro, A.; Laboratoire Geologie Des Systemes Volcaniques, IPGP/UPMC, Paris, France; Laboratoire Pierre Süe, UMR9956, CNRS-CEA, Ce-Saclay, France | en |
dc.date.accessioned | 2011-01-17T13:32:42Z | en |
dc.date.available | 2011-01-17T13:32:42Z | en |
dc.date.issued | 2010-03 | en |
dc.identifier.uri | http://hdl.handle.net/2122/6712 | en |
dc.description.abstract | Stromboli is known for its persistent degassing and rhythmic strombolian activity occasionally punctuated by paroxysmal eruptions. The basaltic pumice and scoria emitted during paroxysms and strombolian activity, respectively, differ in their textures, crystal contents and glass matrix compositions, which testify to distinct conditions of crystallization, degassing and magma ascent. We present here an extensive dataset on major elements and volatiles (CO2, H2O, S and Cl) in olivine-hosted melt inclusions and embayments from pyroclasts emplaced during explosive eruptions of variable magnitude. Magma saturation pressures were assessed from the dissolved amounts of H2O and CO2 taking into account the melt composition evolution. Both pressures and melt inclusion compositions indicate that (1) Ca-basaltic melts entrapped in high-Mg olivines (Fo89–90) generate Stromboli basalts through crystal fractionation, and (2) the Stromboli plumbing system can be imaged as a succession of magma ponding zones connected by dikes. The 7–10 km interval, where magmas are stored and differentiate, is periodically recharged by new magma batches, possibly ranging from Ca-basalts to basalts, with a CO2-rich gas phase. These deep recharges promote the formation of bubbly basalt blobs, which are able to intrude the shallow plumbing system (2–4 km), where CO2 gas fluxing enhances H2O loss, crystallization and generation of crystal-rich, dense, degassed magma. Chlorine partitioning into the H2O–CO2-bearing gas phase accounts for its efficient degassing (≥69%) under the open-system conditions of strombolian activity. Paroxysms, however, are generated through predominantly closed-system ascent of basaltic magma batches from the deep storage zone. In this situation crystallization is negligible and sulfur exsolution starts at ≤170 MPa. Chlorine remains dissolved in the melt until lower pressures, only 16% being lost upon eruption. Finally, we propose a continuum in explosive eruption energy, from strombolian activity to large paroxysmal events, ultimately controlled by variable pressurization of the deep feeding system associated with magma and gas recharges. | en |
dc.language.iso | English | en |
dc.publisher.name | Oxford University Press | en |
dc.relation.ispartof | Journal of Petrology | en |
dc.relation.ispartofseries | 3/51(2010) | en |
dc.relation.isversionof | http://hdl.handle.net/2122/5718 | en |
dc.subject | Stromboli | en |
dc.subject | melt inclusions | en |
dc.subject | magmatic volatiles | en |
dc.subject | CO2 fluxing | en |
dc.subject | magma degassing | en |
dc.title | Conditions of Magma Storage, Degassing and Ascent at Stromboli: New Insights into the Volcano Plumbing System with Inferences on the Eruptive Dynamics | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 603-626 | en |
dc.identifier.URL | http://petrology.oxfordjournals.org/content/51/3/603.full | en |
dc.subject.INGV | 04. Solid Earth::04.04. Geology::04.04.05. Mineralogy and petrology | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.03. Magmas | en |
dc.identifier.doi | 10.1093/petrology/egp083 | en |
dc.description.obiettivoSpecifico | 2.3. TTC - Laboratori di chimica e fisica delle rocce | en |
dc.description.obiettivoSpecifico | 3.5. Geologia e storia dei vulcani ed evoluzione dei magmi | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | reserved | en |
dc.contributor.author | Métrich, N. | en |
dc.contributor.author | Bertagnini, A. | en |
dc.contributor.author | Di Muro, A. | en |
dc.contributor.department | Laboratoire Pierre Süe, UMR9956, CNRS-CEA, Ce-Saclay, France; Istituto Nazionale Di Geofisica e Vulcanologia, Pisa, Italy | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia | en |
dc.contributor.department | Laboratoire Geologie Des Systemes Volcaniques, IPGP/UPMC, Paris, France; Laboratoire Pierre Süe, UMR9956, CNRS-CEA, Ce-Saclay, France | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Laboratoire Pierre Sue, CNRS-CEA, CE-Saclay, 91191 Gif sur Yvette, France | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia | - |
crisitem.author.dept | Dipartimento di Scienze della Terra, Pisa, Italy | - |
crisitem.author.orcid | 0000-0003-4075-2242 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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JP_Métrich_etal_2010.pdf | 1.44 MB | Adobe PDF |
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