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Anatomy of a fumarolic system inferred from a multiphysics approach

Journal Article · · Scientific Reports
 [1];  [2];  [2];  [3];  [2];  [4];  [2];  [5];  [2];  [6];  [7];  [7];  [6]
  1. Univ. of Grenoble (France). Inst. of Earth Sciences (ISTerre); Univ. of Tokyo (Japan). Earthquake Research Inst.
  2. Univ. of Grenoble (France). Inst. of Earth Sciences (ISTerre)
  3. National Inst. of Geophysics and Volcanology (INGV), Bologna (Italy)
  4. Swiss Federal Inst. of Technology in Zurich (ETH Zurich) (Switzerland)
  5. National Inst. of Geophysics and Volcanology (INGV), Rome (Italy)
  6. National Inst. of Geophysics and Volcanology (INGV), Naples (Italy). Vesuvius Observatory
  7. Roma Tre Univ., Rome (Italy)
+ Show Author Affiliations
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.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
European Union (EU); National Agency for Research (ANR) (France); Rhône-Alpes Region (France); USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1477420
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Vol. 8; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Heat and Mass Transport in a Vapor‐Dominated Hydrothermal Area in Yellowstone National Park, USA: Inferences From Magnetic, Electrical, Electromagnetic, Subsurface Temperature, and Diffuse CO 2 Flux Measurements journal January 2019
Insight Into Campi Flegrei Caldera Unrest Through Seismic Tremor Measurements at Pisciarelli Fumarolic Field journal November 2019

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Related Subjects

58 GEOSCIENCES
geochemistry
geophysics
hydrogeology
seismology
volcanology