Recent findings from Iceland's Fagradalsfjall eruptions change what we know about how volcanoes work nature
). Thus, although minor compositional modification of the carrier liquids and growth of crystal rims occurred in transit during decompression, mixing and cooling, high-pressure phase relationships of erupted products were preserved and suggest deep, near-Moho magma storage.
Fig. 4: Conceptual model of melt extraction, accumulation, mixing and crustal ascent beneath Fagradalsfjall., Melt storage pressures obtained by olivine-plagioclase-augite-melt barometry using compositions from glass, and MIs, clinopyroxene –liquid barometry from crystal cores and rims, and the storage pressures consistent with the gas COratio, assuming closed-system degassing.
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