Pressure-Enhanced Al/Si Diffusion and Oxygen Isotope Exchange

摘要: A number of experimentalists working in mineralogical systems have been aware enhanced reactions at elevated pressures, although little comment exists the literature. In with carbonate opposed anvil, “simple squeezer” device (e.g., Goldsmith and Graf, 1960), initially rapid reaction rates were noted assumed to be largely a result shear stresses intimate contact (compaction), produced by externally applied high pressure. This explanation does not apply, however, hydrostatic hydrothermal systems, Newton (1974) found that reversed equilibria alkali feldspar solvus below 600 °C could attained reasonable laboratory times \({{\text{H}}_{\text{2}}}{\text{O}}\) less than approximately 9 kbar, but it was readily achieved pressures 10 kbar or more. Smith Parsons 1 runs > 2300 h, brackets are tightly constrained. Reaction rate differences H20 pressure striking.