Laboratory Experiments, Numerical Calculations, and Petrologic Applications of Mass Transfer in Crystal Melt-Mushy Systems

9903020梁拟议的研究是对简单但具有地质意义的多组分系统(CaO-Al_2O_3-SiO_2和CaO-MgO-Al_2O_3-SiO_2)中矿物+熔体的晶体生长和溶解进行的实验室和数值研究相结合的研究。这项研究将解决以下有关硅酸盐泥浆中传质的问题：(1)晶体和间隙熔体在传质过程中是否处于局部化学平衡；(2)晶体生长和溶解的速度限制因素和传质机制；(3)晶体生长或溶解的速度；(4)矿物学对间隙熔体组成的影响；以及(5)凝固岩浆体中是否可以形成烟囱。希望通过对硅酸盐碎屑中晶体生长和溶解的实验室和数值研究相结合的方法，我们能够深入了解糊状区的传质过程和机制，更好地理解岩浆的分异过程。

9903020LiangThe proposed research is a combined laboratory and numerical study of crystal growth and dissolution of a mineral + melt mush in simple but geologically relevant multicomponent systems (CaO-Al2O3-SiO2 and CaO-MgO-Al2O3-SiO2). The study will address the following questions regarding mass transfer in a silicate mush: (1) if crystals and interstitial melt are in local chemical equilibrium during mass transfer; (2) the rate limiting factors and mass transfer mechanisms for crystal growth and dissolution; (3) the rate of crystal growth or dissolution; (4) the effect of mineralogy on interstitial melt composition; and (5) if chimneys can be formed in a solidifying magma body. It is hoped that by using a combined laboratory and numerical study of crystal growth and dissolution in a silicate mush we will be able to gain insights into the processes and mechanisms of mass transfer in a mushy zone, better our understanding of magma differentiation processes.