NissirosV1, Main, Exploration, bibRecord, 000098

CO2/CH4 ratio in fumaroles a powerful tool to detect magma degassing episodes at quiescent volcanoes

Identifieur interne : 000098 ( Main/Exploration ); précédent : 000097; suivant : 000099

CO2/CH4 ratio in fumaroles a powerful tool to detect magma degassing episodes at quiescent volcanoes

Auteurs : Giovanni Chiodini [Italie]

Source :

Geophysical Research Letters [ 0094-8276 ] ; 2009-01.

RBID : ISTEX:E5775EA72566E7599CAFC96A0BB93532E53D6E73

English descriptors

KwdEn :
- Caldera, Caliro, Campi, Campi flegrei, Campi flegrei caldera, Chiodini, Degassing, Flegrei, Fluid pressure, Fumaroles, Fumarolic, Fumarolic compositions, Fumarolic ratio, Geochemical, Geophys, Giggenbach, Ground deformation, Ground elevation, Ground uplift, Hydrothermal, Hydrothermal system, Hydrothermal systems, Magma, Magma degassing, Magma degassing episodes, Magmatic, Magmatic fluids, Magmatic gases, Mammoth mountain, Nisyros, Osservatorio vesuviano, Panarea, Phlegrean fields, Redox, Redox conditions, Secular subsidence, Seismicity, Solfatara, Time series, Uplift, Volcanic, Volcanic unrest periods, Volcano.
Teeft :
- Caldera, Caliro, Campi, Campi flegrei, Campi flegrei caldera, Chiodini, Degassing, Flegrei, Fluid pressure, Fumaroles, Fumarolic, Fumarolic compositions, Fumarolic ratio, Geochemical, Geophys, Giggenbach, Ground deformation, Ground elevation, Ground uplift, Hydrothermal, Hydrothermal system, Hydrothermal systems, Magma, Magma degassing, Magma degassing episodes, Magmatic, Magmatic fluids, Magmatic gases, Mammoth mountain, Nisyros, Osservatorio vesuviano, Panarea, Phlegrean fields, Redox, Redox conditions, Secular subsidence, Seismicity, Solfatara, Time series, Uplift, Volcanic, Volcanic unrest periods, Volcano.

Abstract

Long time series of fumarolic compositions at Campi Flegrei (Italy), Mammoth Mountain (California), Panarea (Italy) and Nisyros (Greece) show rapid increases, up to orders of magnitude, of the CO2/CH4 ratio systematically with the occurrence of volcanic unrest periods. These easily detected anomalies originate with the arrival of CH4‐poor magmatic fluids in the shallower levels of the volcanoes. The data suggest that volcanoes are characterized by magmatic activity at depth also in periods of apparent quiescence. The activity is constituted by the pulsing release of large amount of fluids which either cause unrest periods (seismicity and ground deformation) or possibly could precede volcanic eruption. This type of volcanic activity can be monitored trough the classical geophysical techniques together with the systematic sampling and analysis of fumaroles.

Url:

https://api.istex.fr/document/E5775EA72566E7599CAFC96A0BB93532E53D6E73/fulltext/pdf

DOI: 10.1029/2008GL036347

Affiliations:

Italie

Links toward previous steps (curation, corpus...)

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Le document en format XML

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<term>Phlegrean fields</term>
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<term>Secular subsidence</term>
<term>Seismicity</term>
<term>Solfatara</term>
<term>Time series</term>
<term>Uplift</term>
<term>Volcanic</term>
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<front><div type="abstract">Long time series of fumarolic compositions at Campi Flegrei (Italy), Mammoth Mountain (California), Panarea (Italy) and Nisyros (Greece) show rapid increases, up to orders of magnitude, of the CO2/CH4 ratio systematically with the occurrence of volcanic unrest periods. These easily detected anomalies originate with the arrival of CH4‐poor magmatic fluids in the shallower levels of the volcanoes. The data suggest that volcanoes are characterized by magmatic activity at depth also in periods of apparent quiescence. The activity is constituted by the pulsing release of large amount of fluids which either cause unrest periods (seismicity and ground deformation) or possibly could precede volcanic eruption. This type of volcanic activity can be monitored trough the classical geophysical techniques together with the systematic sampling and analysis of fumaroles.</div>
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CO2/CH4 ratio in fumaroles a powerful tool to detect magma degassing episodes at quiescent volcanoes

CO2/CH4 ratio in fumaroles a powerful tool to detect magma degassing episodes at quiescent volcanoes

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri