SO₂ Gas Reactions with Silicate Glasses

Abstract

Sulfur dioxide (SO2(g)) is an important gas species in most common volcanic settings on Earth including subduction zones (Shinohara 2013). The relative abundances of SO2(g) may vary at a volcano over time with the highest rates of SO2(g) emissions occurring during eruptive degassing and lesser amounts emitted continuously during quiescent degassing, resulting in a large total amount of SO2(g) integrated over time of the order of 10 Mt/a (McCormick et al. 2013; Shinohara 2013; Henley and Hughes 2016). Much of the emitted SO2(g) is released at high temperatures