Abstract:Giant volcanic eruptions have the potential to overturn civilization. Yet, the driving mechanism and timescale over which batholithic magma reservoirs transition from non-eruptible crystal mush to mobile melt-dominated stages and our capacity to detect a pending super-eruption remain obscure. Here we show, using Sr isotope zonation in plagioclase crystals from three Andean large magnitude eruptions (Atana, Toconao and Tara ignimbrites), that eruptible magma has emerged by amalgamation of isotopically diverse c… Show more
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