Relations Between Structure, Redox Equilibria of Iron, and Properties of Magmatic Liquids

Abstract

An understanding of how intensive and extensive properties control the properties of magmatic liquids (needed to describe and understand static and dynamic processes in magmatic systems) requires characterization of how the structure of silicate liquids affect their properties. To answer this need, recent experimental and theoretical petrological studies have been focused on structure and the relationships between structure and properties of silicate liquids as a function of bulk composition, temperature, pressure, and (for aliovalent cations) oxygen fugacity (e.g., Kushiro, 1975, 1980; Hess, 1980; Stebbins, 1989; Mo et al., 1982; Mysen and Virgo, 1985; Dingwell and Virgo, 1988; Mysen et al., 1982,1983,1984, 1985a,b,c; Bottinga et al, 1981, 1982; Murdoch et al., 1985; Kirkpatrick et al., 1986).