The behavior of noble gases in silicate liquids: Solution, diffusion, bubbles and surface effects, with applications to natural samples

摘要: Solubilities of noble gases in five natural silicate liquids as a function temperature and partial pressure at 1 atm total were determined diffusion coefficients the measured tholeiite basalt 1350°C. obey Henry's law are strong composition and/or physical properties liquids. Solubility is greatest less dense, more silica-rich highest for light related to radius gas atom according Ki = aexp (−br2i). Temperature dependence solubility weak, but general increases with increasing yielding positive enthalpies solution. Diffusion liquid 1350°C show or same linear relationship r2 larger than what would be expected from extrapolation values lower temperatures. A large percentage samples andesite had bubbles that contained which was fractionated experiment. Concentrations equilibrated on Pt wire loops correlate surface/volume ratio, suggesting surfaces can accommodate proper. fractionation valid process account certain patterns marine basalts. The density appears good predictor these