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Abstract Trace element partitioning in clinopyroxene and amphibole governs the geochemical evolution of alkaline magmas, directly impacting liquid lines of descent reconstruction, volcanic hazard assessment and magmatic ore exploration in these volcanic settings.
The two most recent eruptions of Volcàn Quizapu (southern Andes, Chile), only 86 years apart, were both triggered by magma recharge and extruded the same volume (about 5 km3) of the same volatile-rich dacitic magma, but showed a remarkable shift from effusive (1846-47) to explosive (1932) behavior.
Magma degassing fundamentally controls the Earth's volatile cycles. The large amount of gas expelled into the atmosphere during volcanic eruptions (i.e. volcanic outgassing) is the most obvious display of magmatic volatile release.
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