Reaction Kinetics and Geospeedometry

9315918张本项目拟进一步探索均相反应动力学在地速测量中的应用潜力。不同热历史的不同均相反应的动力学将通过理论分析和数值模拟进行系统和定量的研究。定量评价了正向反应活化能、逆向反应活化能、指数前因子、冷却速率、扩散等参数对不同反应冷却过程动力学的影响。流纹岩玻璃中含水物质相互转化的动力学将通过实验加以表征。物种形成随时间的变化将用于提取反应速率系数和反应机制，这将使科学家能够约束火山玻璃的热历史，并更全面地了解火山过程。

9315918 Zhang This project proposes to explore further the potential of applying homogenous reaction kinetics to geospeedometry. The kinetics of different homogeneous reactions for various thermal histories will be examined systematically and quantitatively with theoretical analysis and numerical simulations. The effect of parameters such as activation energies of forward and backward reactions, pre-exponential factors, cooling rates, and diffusion on the kinetics of different reactions during cooling will be quantitatively evaluated. The kinetics of the interconversion of hydrous species in rhyolitic glasses will be characterized experimentally. The variation of speciation with time will be used to extract reaction rate coefficients and reaction mechanisms, which will enable scientists to constrain the thermal history of volcanic glasses and understand more completely volcanic processes.