ZANON, V., D’AURIA, L., SCHIAVI, F., CYRZAN, K., PANKHURST, M.J. (2024) – Toward a near real-time magma ascent monitoring by combined fluid inclusion barometry and ongoing seismicity. Science Advances, 10(6), eadi4300, doi: 10.1126/sciadv.adi4300.

​Fluid inclusion microthermometry on olivines, clinopyroxenes, and amphiboles was used during a volcanic erup-tion, in combination with real- time seismic data and rapid petrographic observations, for petrological monitoring purposes. By applying this approach to the study of 18 volcanic samples collected during the eruption of Tajogaite volcano on La Palma Island (Canary Islands) in 2021, changes in the magma system were identified over time and space.  Magma  batches  with  distinct  petrographic  and  geochemical  characteristics  emerged  from  source  zones  whose depth progressively increased from 27 to 31 kilometers. The rise of magma of deeper origin is attested by fluid inclusions made of N2 and CO, markers of mantle outgassing. Magma accumulation occurred over different durations at depths of 22 to 27 and 4 to 16 kilometers. Time- integrated magma ascent velocities (including pond-ing times) were estimated at between 0.01 and 0.1 meters per second. This method is cost-effective and quickly identifies changes in the magma system during an eruption, enhancing petrological monitoring procedures​.