DISTRIBUTION FEATURES OF RARE-METAL ELEMENTS AND LITHIUM BETWEEN PHASES IN THE FLUORINE-BEARING GRANITE SYSTEMтезисы доклада

Работа с тезисами доклада


[1] Distribution features of rare-metal elements and lithium between phases in the fluorine-bearing granite system / T. I. Shchekina, A. A. Rusak, Y. O. Alfereva et al. // Experiment in Geosciences. — Vol. 24. — IEM RUS C h e r n o g o l o v k a, 2018. The distribution of rare-earth elements, Y, Sc and Li between aluminosilicate (L) and aluminofluoride (LF) melts in the granite system with limiting fluorine concentrations at 700 and 800oC, 1 and 2 kbar pressure was studied. The water content was from 2.5 to 50 wt.%. It is shown that all rare-earth elements, Y, Sc and Li are distributed in favor of the aluminofluoride salt melt, regardless of the experiment conditions. However, the partition coefficients of the elements KdREE(LF/L) between these phases depend on the pressure, temperature and water content in the system. It is shown for the first time that an increase in pressure from 1 to 2 kbar at T = 700-800oC in the studied system causes a significant decrease in the KdREE(LF/L). An increase in the water concentration in the system usually causes an increase in KdREE(LF/L).

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