Magma storage and volatile exsolution modulate the explosivity, frequency, and impact of volcanic eruptions, and control the formation of mineral deposits, such as porphyry copper deposits. The architecture of magma plumbing systems, and their volatile budgets, are inaccessible to direct observation in active volcanoes and ore deposits. However, they can be accessed through study of the products of volcanic eruptions and of plutonic intrusions, including crystal, melt and fluid records.

This session aims to explore magma-mush systems feeding volcanism and magmatic ore deposits, with a focus on magma dynamics and volatile budgets driving eruptions and mineralisation in critical metals for the green energy transition. We welcome contributions that use field observations, petrography and textural data, bulk and microchemical analyses from volcanic/plutonic rocks, and/or combine natural data with experimental petrology and with thermodynamic, kinetic, and thermomechanical models to better understand pre-eruptive magma storage and volatiles, and the mush switches that drive volcanic eruptions or economic-grade ore mineralisation.