Experimental Studies of Phenakite Solubility in Alkaline Granitoid Melts

Autor: B. B. Damdinov, V. B. Khubanov, N. I. Suk, L. B. Damdinova, A. R. Kotelnikov
Rok vydání: 2021
Předmět:
Zdroj: Doklady Earth Sciences. 498:477-481
ISSN: 1531-8354
1028-334X
DOI: 10.1134/s1028334x21060064
Popis: 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.
Databáze: OpenAIRE
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