Lithium in felsic magmas: a volcanological perspective

Volcanic eruptions are unpredictable phenomena that pose a challenge to crisis management, owing the fact contrasted eruptive styles (explosive versus effusive) exhibited at surface depend on unobservable deep processes occurring in reservoir and volcanic conduit. Constricting behaviour of magma during ascent, degassing particular, allows for clearer understanding relationships between petrological volcano monitoring signals, hence better description hazard. To this aim, lithium (Li) has been used track magmatic post-eruptive processes, as geospeedometer operating short time scales due its high mobility silicate melts crystals. Yet, accurate use Li assess syn- still lack complete dataset. We propose review our current knowledge behavior, with an emphasis felsic (andesitic rhyolitic) magmas whose explosive behavior is poorly understood. present regarding concentration isotopic compositions, intracrystalline diffusion, crystal-melt-fluid partition coefficients discovered primary describe difficulties interpreting data investigate differentiation, degassing, ascent rate, volatile fluxing, cooling magmas. Finally, we suggest future directions expanding behavior.