This study provides the first micro-thermometric data of fluid inclusions (FIs) in mafic loose (disaggregated) xenocrysts and ultramafic xenoliths in explosive products of the melilitite-carbonatite Mt. Vulture volcano (southern Italy). Pure CO2 late stage FIs hosted in rock-forming minerals of wehrlite xenoliths and clinopyroxene xenocrysts were trapped at the local crust-mantle boundary (32 km). In contrast, trapping pressures within the loose olivine xenocrysts are from 3.2 to 4.5 kbar (8–13 km). Considering the ongoing degassing of mantle-derived CO2 rich gases, together with seismic evidences of the presence of low amount of melts at depth, and the tectonic control of the past volcanic activity, our study opens new perspective about the hazardous nature of the “quiescent” melilitite-carbonatite volcanoes.

Gabriele Carnevale, Antonio Caracausi, Silvio Giuseppe Rotolo, Michele Paternoster, Vittorio Zanon (2022). New Inferences on Magma Dynamics in Melilitite-Carbonatite Volcanoes: The Case Study of Mt. Vulture (Southern Italy). GEOPHYSICAL RESEARCH LETTERS, 49(21), 1-10 [10.1029/2022GL099075].

New Inferences on Magma Dynamics in Melilitite-Carbonatite Volcanoes: The Case Study of Mt. Vulture (Southern Italy)

Gabriele Carnevale
;
Silvio Giuseppe Rotolo;Michele Paternoster;
2022-11-07

Abstract

This study provides the first micro-thermometric data of fluid inclusions (FIs) in mafic loose (disaggregated) xenocrysts and ultramafic xenoliths in explosive products of the melilitite-carbonatite Mt. Vulture volcano (southern Italy). Pure CO2 late stage FIs hosted in rock-forming minerals of wehrlite xenoliths and clinopyroxene xenocrysts were trapped at the local crust-mantle boundary (32 km). In contrast, trapping pressures within the loose olivine xenocrysts are from 3.2 to 4.5 kbar (8–13 km). Considering the ongoing degassing of mantle-derived CO2 rich gases, together with seismic evidences of the presence of low amount of melts at depth, and the tectonic control of the past volcanic activity, our study opens new perspective about the hazardous nature of the “quiescent” melilitite-carbonatite volcanoes.
Settore GEO/07 - Petrologia E Petrografia
Settore GEO/08 - Geochimica E Vulcanologia
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2022GL099075
Gabriele Carnevale, Antonio Caracausi, Silvio Giuseppe Rotolo, Michele Paternoster, Vittorio Zanon (2022). New Inferences on Magma Dynamics in Melilitite-Carbonatite Volcanoes: The Case Study of Mt. Vulture (Southern Italy). GEOPHYSICAL RESEARCH LETTERS, 49(21), 1-10 [10.1029/2022GL099075].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/573506
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