Publications des scientifiques de l'IRD

Gresse M., Vandemeulebrouck J., Byrdina Svetlana, Chiodini G., Roux P., Rinaldi A. P., Wathelet Marc, Ricci T., Letort J., Petrillo Z., Tuccimei P., Lucchetti C., Sciarra A. (2018). Anatomy of a fumarolic system inferred from a multiphysics approach. Scientific Reports - Nature, 8, p. art. 7580 [11 p.]. ISSN 2045-2322.

Titre du document
Anatomy of a fumarolic system inferred from a multiphysics approach
Année de publication
2018
Type de document
Article référencé dans le Web of Science WOS:000432108700026
Auteurs
Gresse M., Vandemeulebrouck J., Byrdina Svetlana, Chiodini G., Roux P., Rinaldi A. P., Wathelet Marc, Ricci T., Letort J., Petrillo Z., Tuccimei P., Lucchetti C., Sciarra A.
Source
Scientific Reports - Nature, 2018, 8, p. art. 7580 [11 p.] ISSN 2045-2322
Fumaroles are a common manifestation of volcanic activity that are associated with large emissions of gases into the atmosphere. These gases originate from the magma, and they can provide indirect and unique insights into magmatic processes. Therefore, they are extensively used to monitor and forecast eruptive activity. During their ascent, the magmatic gases interact with the rock and hydrothermal fluids, which modify their geochemical compositions. These interactions can complicate our understanding of the real volcanic dynamics and remain poorly considered. Here, we present the first complete imagery of a fumarolic plumbing system using three-dimensional electrical resistivity tomography and new acoustic noise localization. We delineate a gas reservoir that feeds the fumaroles through distinct channels. Based on this geometry, a thermodynamic model reveals that near-surface mixing between gas and condensed steam explains the distinct geochemical compositions of fumaroles that originate from the same source. Such modeling of fluid interactions will allow for the simulation of dynamic processes of magmatic degassing, which is crucial to the monitoring of volcanic unrest.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020] ; Géologie et formations superficielles [064] ; Géophysique interne [066]
Description Géographique
ITALIE ; VESUVE
Localisation
Fonds IRD [F B010072860]
Identifiant IRD
fdi:010072860
Contact