Due to their volatile nature and low solubility in silicate melts at the surface of the Earth, the direct measurement of the volatile components H2O and CO2 in magmatic systems is dependent on the presence of glass inclusions trapped in a crystal host prior to eruption. These inclusions, along with the glassy rinds of submarine pillow lavas, represent one of the few windows researchers have into the pre-eruptive chemical characteristics of magmatic systems (e.g., Anderson et al. 2000; Roggensack 2001a; Metrich and Wallace 2008). This information is critically important, as it is volatile exsolution...

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