Experimental Determination of Oxygen and Hydrogen Isotope Fractionation Factors Between Alunite and Water

将进行实验，在250到450摄氏度的温度范围内测定明矾石和水之间的氧和氢同位素分馏。交换实验将在冷封热液容器中进行，运行时间为1至3个月，并将涉及同位素交换和Na-K交换的耦合，以促进达到平衡。对明矾石分馏系数的了解将有助于校准明矾石-石英和明矾石-黄铁矿同位素地质温度计，并将能够根据形成温度和产生它们的各种流体的化学成分来解释含明矾石矿床。

Experiments will be conducted to determine oxygen and hydrogen isotope fractionation between alunite and water over the temperature range of 250 to 450oC. Exchange experiments will be conducted in cold seal hydrothermal vessels with runs of 1 to 3 months duration, and will involve coupling of isotope exchange with Na-K exchange to facilitate attainment of equilibrium. Knowledge of alunite fractionation factors will allow calibration of alunite-quartz and alunite-pyrite isotope geothermometers, and will permit interpretaion of alunite-bearing deposits in terms of temperatures of formation and the chemical compositions of the various fluids that produced them.