Comments on oxygen isotope geothermometry

摘要: Abstract We discuss the temperature dependence of fractionation factor α, for oxygen isotopic exchange between silicates, magnetite and water from a theoretical point view. It is shown that anhydrous silicates 1000lnα (mineral water) = −3.7 + B/T 2 , where B constant, interval 500° to 800°C. Using results laboratory experiments natural observed fractionations, we have derived equations quartz, feldspar, muscovite magnetite-water systems, which in certain cases are considerably different already published equations.