Viscosity of Dry and Hydrous Diopside Melts at High Pressures: Implications for Upper Mantle Magma Dynamics

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In situ measurements show viscosity changes in diopside melts with water, indicating significant effects on mantle magma dynamics.

Mobility of basaltic magma increases by over 1 order of magnitude with 3 wt.% H2O content, enhancing magma ascent.
In situ falling-sphere viscosity measurements on diopside melts reveal effects of pressure and water on viscosity.
Viscosity model integrates hydrous diopside data into existing frameworks for predicting magma behavior.
Increased melt mobility may explain large magmatism in igneous provinces, highlighting mantle dynamics.

Chen et al. (2025) studied this question.

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