Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/9882
DC Field | Value | Language |
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dc.contributor.authorall | La Spina, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia | en |
dc.contributor.authorall | Burton, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia | en |
dc.contributor.authorall | Allard, P. | en |
dc.contributor.authorall | Alparone, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia | en |
dc.contributor.authorall | Mure, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia | en |
dc.date.accessioned | 2015-06-11T13:14:45Z | en |
dc.date.available | 2015-06-11T13:14:45Z | en |
dc.date.issued | 2015-01-19 | en |
dc.identifier.uri | http://hdl.handle.net/2122/9882 | en |
dc.description.abstract | In June–July 2001 a series of 16 discrete lava fountain paroxysms occurred at the Southeast summit crater (SEC) of Mount Etna, preceding a 28-day long violent flank eruption. Each paroxysm was preceded by lava effusion, growing seismic tremor and a crescendo of Strombolian explosive activity culminating into powerful lava fountaining up to 500m in height. During 8 of these 16 events we could measure the chemical composition of the magmatic gas phase (H2O, CO2, SO2, HCl, HF and CO), using open-path Fourier transform infrared (OP-FTIR) spectrometry at ∼1–2km distance from SEC and absorption spectra of the radiation emitted by hot lava fragments. We show that each fountaining episode was characterized by increasingly CO2-rich gas release, with CO2/SO2and CO2/HCl ratios peaking in coincidence with maxima in seismic tremor and fountain height, whilst the SO2/HCl ratio showed a weak inverse relationship with respect to eruption intensity. Moreover, peak values in both CO2/SO2ratio and seismic tremor amplitude for each paroxysm were found to increase linearly in proportion with the repose interval (2–6 days) between lava fountains. These observations, together with a model of volatile degassing at Etna, support the following driving process. Prior to and during the June–July 2001 lava fountain sequence, the shallow (∼2km) magma reservoir feeding SEC received an increasing influx of deeply derived carbon dioxide, likely promoted by the deep ascent of volatile-rich primitive basalt that produced the subsequent flank eruption. This CO2-rich gas supply led to gas accumulation and overpressure in SEC reservoir, generating a bubble foam layer whose periodical collapse powered the successive fountaining events. The anti-correlation between SO2/HCl and eruption intensity is best explained by enhanced syn-eruptive degassing of chlorine from finer particles produced during more intense magma fragmentation. | en |
dc.language.iso | English | en |
dc.publisher.name | Elsevier | en |
dc.relation.ispartof | Earth and Planetary Science Letters | en |
dc.relation.ispartofseries | /413 (2015) | en |
dc.subject | FTIR remote sensing | en |
dc.subject | lava fountains | en |
dc.subject | gas composition | en |
dc.subject | magma degassing | en |
dc.subject | separate CO2transfer | en |
dc.title | Open-path FTIR spectroscopy of magma degassing processes during eight lava fountains on Mount Etna | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 123-134 | en |
dc.subject.INGV | 05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions | en |
dc.identifier.doi | 10.1016/j.epsl.2014.12.038 | en |
dc.description.obiettivoSpecifico | 3V. Dinamiche e scenari eruttivi | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | restricted | en |
dc.contributor.author | La Spina, A. | en |
dc.contributor.author | Burton, M. | en |
dc.contributor.author | Allard, P. | en |
dc.contributor.author | Alparone, S. | en |
dc.contributor.author | Mure, F. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia | 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 | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
crisitem.author.orcid | 0000-0002-5007-613X | - |
crisitem.author.orcid | 0000-0001-6588-7560 | - |
crisitem.author.orcid | 0000-0001-7836-3117 | - |
crisitem.author.orcid | 0000-0003-1161-1512 | - |
crisitem.author.orcid | 0000-0003-4272-7921 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 05. General | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
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La Spina et,al 2015_ Open-path FTIR spectroscopy of magma degassing processes during eight lava fountains on Mount Etna.pdf | 3.25 MB | Adobe PDF |
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