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

Barbara Bonechi, Vincenzo Stagno, Yoshio Kono, Rostislav Hrubiak, Luca Ziberna, Giovanni B. Andreozzi, Cristina Perinelli, Mario Gaeta

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Article number2599
JournalScientific Reports
Volume12
Issue number1
DOIs
Publication statusPublished - 16 Feb 2022

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