Vein networks in hydrothermal systems provide constraints for the monitoring of active volcanoes

Abstract Vein networks affect the hydrothermal systems of many volcanoes, and variations in their arrangement may precede hydrothermal and volcanic eruptions. However, the long-term evolution of vein networks is often unknown because data are lacking. We analyze two gypsum-filled vein networks affec...

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Autores principales:	Luigi Cucci, Francesca Di Luccio, Alessandra Esposito, Guido Ventura
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8288c9adc4384845892c5ea07e02d57f
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spelling	oai:doaj.org-article:8288c9adc4384845892c5ea07e02d57f2021-12-02T15:06:05ZVein networks in hydrothermal systems provide constraints for the monitoring of active volcanoes10.1038/s41598-017-00230-82045-2322https://doaj.org/article/8288c9adc4384845892c5ea07e02d57f2017-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00230-8https://doaj.org/toc/2045-2322Abstract Vein networks affect the hydrothermal systems of many volcanoes, and variations in their arrangement may precede hydrothermal and volcanic eruptions. However, the long-term evolution of vein networks is often unknown because data are lacking. We analyze two gypsum-filled vein networks affecting the hydrothermal field of the active Lipari volcanic Island (Italy) to reconstruct the dynamics of the hydrothermal processes. The older network (E1) consists of sub-vertical, N-S striking veins; the younger network (E2) consists of veins without a preferred strike and dip. E2 veins have larger aperture/length, fracture density, dilatancy, and finite extension than E1. The fluid overpressure of E2 is larger than that of E1 veins, whereas the hydraulic conductance is lower. The larger number of fracture intersections in E2 slows down the fluid movement, and favors fluid interference effects and pressurization. Depths of the E1 and E2 hydrothermal sources are 0.8 km and 4.6 km, respectively. The decrease in the fluid flux, depth of the hydrothermal source, and the pressurization increase in E2 are likely associated to a magma reservoir. The decrease of fluid discharge in hydrothermal fields may reflect pressurization at depth potentially preceding hydrothermal explosions. This has significant implications for the long-term monitoring strategy of volcanoes.Luigi CucciFrancesca Di LuccioAlessandra EspositoGuido VenturaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Luigi Cucci Francesca Di Luccio Alessandra Esposito Guido Ventura Vein networks in hydrothermal systems provide constraints for the monitoring of active volcanoes
description	Abstract Vein networks affect the hydrothermal systems of many volcanoes, and variations in their arrangement may precede hydrothermal and volcanic eruptions. However, the long-term evolution of vein networks is often unknown because data are lacking. We analyze two gypsum-filled vein networks affecting the hydrothermal field of the active Lipari volcanic Island (Italy) to reconstruct the dynamics of the hydrothermal processes. The older network (E1) consists of sub-vertical, N-S striking veins; the younger network (E2) consists of veins without a preferred strike and dip. E2 veins have larger aperture/length, fracture density, dilatancy, and finite extension than E1. The fluid overpressure of E2 is larger than that of E1 veins, whereas the hydraulic conductance is lower. The larger number of fracture intersections in E2 slows down the fluid movement, and favors fluid interference effects and pressurization. Depths of the E1 and E2 hydrothermal sources are 0.8 km and 4.6 km, respectively. The decrease in the fluid flux, depth of the hydrothermal source, and the pressurization increase in E2 are likely associated to a magma reservoir. The decrease of fluid discharge in hydrothermal fields may reflect pressurization at depth potentially preceding hydrothermal explosions. This has significant implications for the long-term monitoring strategy of volcanoes.
format	article
author	Luigi Cucci Francesca Di Luccio Alessandra Esposito Guido Ventura
author_facet	Luigi Cucci Francesca Di Luccio Alessandra Esposito Guido Ventura
author_sort	Luigi Cucci
title	Vein networks in hydrothermal systems provide constraints for the monitoring of active volcanoes
title_short	Vein networks in hydrothermal systems provide constraints for the monitoring of active volcanoes
title_full	Vein networks in hydrothermal systems provide constraints for the monitoring of active volcanoes
title_fullStr	Vein networks in hydrothermal systems provide constraints for the monitoring of active volcanoes
title_full_unstemmed	Vein networks in hydrothermal systems provide constraints for the monitoring of active volcanoes
title_sort	vein networks in hydrothermal systems provide constraints for the monitoring of active volcanoes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/8288c9adc4384845892c5ea07e02d57f
work_keys_str_mv	AT luigicucci veinnetworksinhydrothermalsystemsprovideconstraintsforthemonitoringofactivevolcanoes AT francescadiluccio veinnetworksinhydrothermalsystemsprovideconstraintsforthemonitoringofactivevolcanoes AT alessandraesposito veinnetworksinhydrothermalsystemsprovideconstraintsforthemonitoringofactivevolcanoes AT guidoventura veinnetworksinhydrothermalsystemsprovideconstraintsforthemonitoringofactivevolcanoes
_version_	1718388593529978880

Vein networks in hydrothermal systems provide constraints for the monitoring of active volcanoes

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