富氟花岗质熔体形成和演化的实验研究

Experimental study on formation and evolution of F-rich granitic melt.

通过高温高压实验,模拟了富氟花岗质熔体形成和演化的过程。结果表明,随着结晶分异作用的进行,熔体中SiO_2含量降低而Al_2O_3和F含量升高,相应地,A/NKC和NKA/Si比值逐渐升高,并最终形成了贫硅过铝富氟的熔体。

Through high T-P experiments, the process of generation and evolution of F-rich granitic melt had been studied. The results demonstrate that along with crystallization of granitic magma, SiO2 in the residual melt decrease, while Al2O3 and F increase which results in both A/NKC and NKA/Si rations to be increased, and finally poor-Si peraluminous F-rich granite melt to be formed. This is in good agreement with vertical petrochemical zonation observed in natural Li-F-rich granites.