Abstract

The solubility of phenakite in aluminosilicate melts of various alkalinity was studied experimentally at T = 1000°C and P = 1 kbar in dry conditions and in the presence of 10 wt % H₂O. The experiments were carried out on a high gas pressure vessel. The duration of the experiments was five days. The initial material was prefused glass of granite composition with different agpaiticity (1–1.5), as well as natural phenakite. The composition of the samples after the experiments was determined by means of electron probe X-ray spectral analysis, and the beryllium content was determined by laser ablation. It was found that the solubility of phenakite depends on the composition of the aluminosilicate melt, increasing with increasing agpaiticity ((Na + K)/Al). The Be concentrations in dry melts vary within 0.67–1.3 wt %, and in the presence of an aqueous fluid, 1.58–2.28 wt %. The experimental data obtained testify in favor of the concentration of beryllium in residual alkaline water-bearing melts. In this case, the content of beryllium in primary melts can be high enough to form large deposits of beryllium due to its extraction from relatively small magmatic bodies.

中文翻译：

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碱性花岗石熔体中酚铝石溶解度的实验研究

摘要

在T = 1000°C 和P = 1 kbar、干燥条件和 10 wt % H ₂存在下，实验研究了酚铝石在各种碱度的铝硅酸盐熔体中的溶解度O. 实验是在高压气体容器上进行的。实验持续五天。初始材料是具有不同比重 (1-1.5) 的花岗岩成分的预熔玻璃，以及天然酚醛石。实验后样品的成分通过电子探针X射线光谱分析确定，铍含量通过激光烧蚀确定。发现酚铝石的溶解度取决于铝硅酸盐熔体的组成，随着水溶度 ((Na + K)/Al) 的增加而增加。干熔体中的 Be 浓度在 0.67-1.3 wt% 之间变化，在水性流体存在的情况下，为 1.58-2.28 wt%。获得的实验数据证明了铍在残余碱性含水熔体中的浓度。在这种情况下，