从自由能计算判别硅酸盐熔融体之不混溶

硅酸盐熔融体发生两液相不混溶可以产生一个富金属相,即矿浆和一个富硅相,即岩浆。这对研究矿浆成因是非常重要的。 Currie曾提出一个方法,根据计算一个硅酸盐熔体分成两液相之前和之后的自由能负值(—G),就可以判别它是否能分成两液相。 作者用Philpotts的岩石分析数据进行了自由能的计算,证实了Currie作法的正确。 作者利用学生合成的人造硅酸盐熔体数据,加以计算,绝大部分是分成两液相的。著名的基鲁纳瓦拉铁矿数据计算结果支持了矿浆成矿论点。

Prediction of Liquid Immiscibility in Silicate Melts in Special Reference to Their Free Energies

Currie proposed a cirterion for predicting liquid immiscibility in silicate melts with reference to their free energies efore and after crystal fractionization of a melt.The present authors have calculated the rock analysis data given by Philpotts and proved the validity of Currie's method.The authors are particularly interested in the study of immiscibility in the magma in relation with iron deposits.Therefore,they have also calculated the data for artificial silicate melts as well as the data from the famous Kirunavaara iron deposit.