The behavior of the melting curves of anhydrous silicates in the presence of water is examined in T-C-w and P-T diagrams. It is demonstrated that the effect of water on the melting temperatures of minerals can be explained ...

Two powerful eruptions of Quizapu vent on Cerro Azul Volcano, Chile are used as examples to discussthe problem of effusive eruptions of magmas having high preeruptive volatile concentrations. A physicochemicalmechanism is ...