3D ultra-high resolution seismic imaging of shallow Solfatara crater in Campi Flegrei (Italy): New insights on deep hydrothermal fluid circulation processes

Abstract Seismic tomography can be used to image the spatial variation of rock properties within complex geological media such as volcanoes. Solfatara is a volcano located within the Campi Flegrei, a still active caldera, so it is of major importance to characterize its level of activity and potenti...

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Autores principales:	Grazia De Landro, Vincenzo Serlenga, Guido Russo, Ortensia Amoroso, Gaetano Festa, Pier Paolo Bruno, Marceau Gresse, Jean Vandemeulebrouck, Aldo Zollo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/28222c6922bf4a43a9d2a897b11ae785
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spelling	oai:doaj.org-article:28222c6922bf4a43a9d2a897b11ae7852021-12-02T11:40:31Z3D ultra-high resolution seismic imaging of shallow Solfatara crater in Campi Flegrei (Italy): New insights on deep hydrothermal fluid circulation processes10.1038/s41598-017-03604-02045-2322https://doaj.org/article/28222c6922bf4a43a9d2a897b11ae7852017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03604-0https://doaj.org/toc/2045-2322Abstract Seismic tomography can be used to image the spatial variation of rock properties within complex geological media such as volcanoes. Solfatara is a volcano located within the Campi Flegrei, a still active caldera, so it is of major importance to characterize its level of activity and potential danger. In this light, a 3D tomographic high-resolution P-wave velocity image of the shallow central part of Solfatara crater is obtained using first arrival times and a multiscale approach. The retrieved images, integrated with the resistivity section and temperature and the CO2 flux measurements, define the following characteristics: 1. A depth-dependent P-wave velocity layer down to 14 m, with Vp < 700 m/s typical of poorly-consolidated tephra and affected by CO2 degassing; 2. An intermediate layer, deepening towards the mineralized liquid-saturated area (Fangaia), interpreted as permeable deposits saturated with condensed water; 3. A deep, confined high velocity anomaly associated with a CO 2 reservoir. These features are expression of an area located between the Fangaia, water saturated and replenished from deep aquifers, and the main fumaroles, superficial relief of the deep rising CO2 flux. Therefore, the changes in the outgassing rate greatly affect the shallow hydrothermal system, which can be used as a “mirror” of fluid migration processes occurring at depth.Grazia De LandroVincenzo SerlengaGuido RussoOrtensia AmorosoGaetano FestaPier Paolo BrunoMarceau GresseJean VandemeulebrouckAldo ZolloNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Grazia De Landro Vincenzo Serlenga Guido Russo Ortensia Amoroso Gaetano Festa Pier Paolo Bruno Marceau Gresse Jean Vandemeulebrouck Aldo Zollo 3D ultra-high resolution seismic imaging of shallow Solfatara crater in Campi Flegrei (Italy): New insights on deep hydrothermal fluid circulation processes
description	Abstract Seismic tomography can be used to image the spatial variation of rock properties within complex geological media such as volcanoes. Solfatara is a volcano located within the Campi Flegrei, a still active caldera, so it is of major importance to characterize its level of activity and potential danger. In this light, a 3D tomographic high-resolution P-wave velocity image of the shallow central part of Solfatara crater is obtained using first arrival times and a multiscale approach. The retrieved images, integrated with the resistivity section and temperature and the CO2 flux measurements, define the following characteristics: 1. A depth-dependent P-wave velocity layer down to 14 m, with Vp < 700 m/s typical of poorly-consolidated tephra and affected by CO2 degassing; 2. An intermediate layer, deepening towards the mineralized liquid-saturated area (Fangaia), interpreted as permeable deposits saturated with condensed water; 3. A deep, confined high velocity anomaly associated with a CO 2 reservoir. These features are expression of an area located between the Fangaia, water saturated and replenished from deep aquifers, and the main fumaroles, superficial relief of the deep rising CO2 flux. Therefore, the changes in the outgassing rate greatly affect the shallow hydrothermal system, which can be used as a “mirror” of fluid migration processes occurring at depth.
format	article
author	Grazia De Landro Vincenzo Serlenga Guido Russo Ortensia Amoroso Gaetano Festa Pier Paolo Bruno Marceau Gresse Jean Vandemeulebrouck Aldo Zollo
author_facet	Grazia De Landro Vincenzo Serlenga Guido Russo Ortensia Amoroso Gaetano Festa Pier Paolo Bruno Marceau Gresse Jean Vandemeulebrouck Aldo Zollo
author_sort	Grazia De Landro
title	3D ultra-high resolution seismic imaging of shallow Solfatara crater in Campi Flegrei (Italy): New insights on deep hydrothermal fluid circulation processes
title_short	3D ultra-high resolution seismic imaging of shallow Solfatara crater in Campi Flegrei (Italy): New insights on deep hydrothermal fluid circulation processes
title_full	3D ultra-high resolution seismic imaging of shallow Solfatara crater in Campi Flegrei (Italy): New insights on deep hydrothermal fluid circulation processes
title_fullStr	3D ultra-high resolution seismic imaging of shallow Solfatara crater in Campi Flegrei (Italy): New insights on deep hydrothermal fluid circulation processes
title_full_unstemmed	3D ultra-high resolution seismic imaging of shallow Solfatara crater in Campi Flegrei (Italy): New insights on deep hydrothermal fluid circulation processes
title_sort	3d ultra-high resolution seismic imaging of shallow solfatara crater in campi flegrei (italy): new insights on deep hydrothermal fluid circulation processes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/28222c6922bf4a43a9d2a897b11ae785
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3D ultra-high resolution seismic imaging of shallow Solfatara crater in Campi Flegrei (Italy): New insights on deep hydrothermal fluid circulation processes

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