Volcanic eruptions are shallow phenomena that represent the final stage of density- and viscosity- driven processes of melt migration from source rocks at upper mantle depths. In this experimental study, we investigated the effect of pressure (0.7–7.0 GPa) and temperature (1335–2000 °C) on the viscosity and the atomic melt structure of a synthetic anhydrous primitive alkaline basalt, an analogue of the pre-eruptive magma that likely feeds the Campi Flegrei Volcanic District at present day. Obtained viscosities (0.5–3.0 Pa s), mobility (0.1–0.4 g cm3 Pa−1 s−1) and ascent velocity (1.5–6.0 m yr−1) are presented to support geochemical and geophysical observations of Campi Flegrei as a critical volcanic district currently undergoing gradual magma recharge at depth.

Experimental measurements of the viscosity and melt structure of alkali basalts at high pressure and temperature / Bonechi, Barbara; Stagno, Vincenzo; Kono, Yoshio; Hrubiak, Rostislav; Ziberna, Luca; Andreozzi, Giovanni B.; Perinelli, Cristina; Gaeta, Mario. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 12:1(2022). [10.1038/s41598-022-06551-7]

Experimental measurements of the viscosity and melt structure of alkali basalts at high pressure and temperature

Bonechi, Barbara
Primo
;
Stagno, Vincenzo
;
Andreozzi, Giovanni B.;Perinelli, Cristina;Gaeta, Mario
2022

Abstract

Volcanic eruptions are shallow phenomena that represent the final stage of density- and viscosity- driven processes of melt migration from source rocks at upper mantle depths. In this experimental study, we investigated the effect of pressure (0.7–7.0 GPa) and temperature (1335–2000 °C) on the viscosity and the atomic melt structure of a synthetic anhydrous primitive alkaline basalt, an analogue of the pre-eruptive magma that likely feeds the Campi Flegrei Volcanic District at present day. Obtained viscosities (0.5–3.0 Pa s), mobility (0.1–0.4 g cm3 Pa−1 s−1) and ascent velocity (1.5–6.0 m yr−1) are presented to support geochemical and geophysical observations of Campi Flegrei as a critical volcanic district currently undergoing gradual magma recharge at depth.
2022
viscosity; melt structure; synchrotron radiation; high pressure; high temperature; Campi Flegrei
01 Pubblicazione su rivista::01a Articolo in rivista
Experimental measurements of the viscosity and melt structure of alkali basalts at high pressure and temperature / Bonechi, Barbara; Stagno, Vincenzo; Kono, Yoshio; Hrubiak, Rostislav; Ziberna, Luca; Andreozzi, Giovanni B.; Perinelli, Cristina; Gaeta, Mario. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 12:1(2022). [10.1038/s41598-022-06551-7]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1611348
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