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dc.contributor.author
Chiodini, Giovanni
dc.contributor.author
Bini, Giulio
dc.contributor.author
Massaro, Silvia
dc.contributor.author
Caliro, Stefano
dc.contributor.author
Kanellopoulos, Christos
dc.contributor.author
Tassi, Franco
dc.contributor.author
Vaselli, Orlando
dc.contributor.author
Vougioukalakis, G.
dc.contributor.author
Bachmann, Olivier
dc.date.accessioned
2023-11-08T09:18:38Z
dc.date.available
2023-11-08T04:36:03Z
dc.date.available
2023-11-08T09:18:38Z
dc.date.issued
2023-10-10
dc.identifier.issn
2296-6463
dc.identifier.other
10.3389/feart.2023.1254547
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/640782
dc.identifier.doi
10.3929/ethz-b-000640782
dc.description.abstract
Hydrothermal explosions occur through the sudden expansion of fluids at or near boiling condition with little or no precursors, making any kind of forecast difficult. Here, we investigate the processes occurring within hydrothermal systems in a potential critical state for explosions through a new methodology based on mass balances of thermal water solutes. The usage of this method reveals that the pore water samples of the Paleochori Bay (Milos, Greece; <20 m depth below sea level), chosen as a case study, are binary mixtures of a geothermal component and seawater, from which steam is either added through condensation of underlying, ascending vapors or separates through boiling. This new method enables us to quantify and map both the fraction of the original geothermal liquid in each pore water sample and that of the vapor supplied or separated from the solutions. Furthermore, the method allows us to compute the composition of the geothermal endmember. The map of the fraction of supplied vapor shows that decompressional boiling of ascending liquids predominantly focuses in the central part of the Paleochori Bay. Both the estimated composition and temperature (324 degrees C) of the geothermal liquid endmember overlap those measured in geothermal well fluids at or near-boiling condition, except SO4 and SiO2. The lower SiO2 and higher SO4 content in the pore waters may be ascribed to the current production of an impermeable cap, which enables underlying fluids to accumulate and pressure to buildup. The evidence of liquid at or near boiling conditions and self-sealing processes in the Paleochori Bay suggests that decompressional boiling during abrupt pressure drawdowns might have caused hydrothermal explosions at Milos in historical times, whose occurrence is testified by several hydrothermal craters. Finally, our work shows that similar conditions favoring explosions still affect the hydrothermal system of Milos. The new methodology described in this work can find useful applications in the study of submerged hydrothermal systems and in understanding the physicochemical conditions that favor hydrothermal explosions.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Frontiers Media
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Geothermal systems
en_US
dc.subject
submerged hydrothermal vents
en_US
dc.subject
hydrothermal explosions
en_US
dc.subject
decompressional boiling
en_US
dc.subject
Geothermometry
en_US
dc.title
Ascent and decompressional boiling of geothermal liquids tracked by solute mass balances: a key to understand the hydrothermal explosions of Milos (Greece)
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Frontiers in Earth Science
ethz.journal.volume
11
en_US
ethz.journal.abbreviated
Front. Earth Sci.
ethz.pages.start
1254547
en_US
ethz.size
14 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Dynamics of magma reservoirs in the earth’s crust; focusing on the role of volatile elements
en_US
ethz.identifier.wos
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03958 - Bachmann, Olivier / Bachmann, Olivier
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::03958 - Bachmann, Olivier / Bachmann, Olivier
ethz.grant.agreementno
178928
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projekte MINT
ethz.date.deposited
2023-11-08T04:36:05Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2023-11-08T09:18:39Z
ethz.rosetta.lastUpdated
2024-02-03T06:02:41Z
ethz.rosetta.versionExported
true
ethz.COinS
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