The effect of temperature and pressure on phase relations and the distribution of yttrium, scandium and rare earth elements in granitic system Si-Al-Na-K-Li-F-O-H

Авторы: Rusak A.A., Shchekina T.I., Alfereva Ya O., Gramenitsky Ye N., Kotelnikov A.R., Zinovieva N.G., Bychkov A.Yu, Akhmedzhanova G.M.
Журнал: Experiment in GeoSciences
Том: 25
Номер: 1
Год издания: 2019
Первая страница: 150
Последняя страница: 153
Аннотация: The distribution of rare-earth elements, Y and Sc between aluminosilicate (L) and aluminofluoride (LF) melts in a granite system with limiting fluorine concentrations at a temperature of 600, 700 and 800 °C, a pressure of 1 and 2 kbar, and a water content of 0 to 50 wt.% was experimentally studied. It is shown that, starting from 700 °C, 1 kbar, the phase relations in the system change. In globules of fluoride melt saturated with rare elements, crystals of KNa-aluminofluorides are isolated, and when the temperature decreases to 600 °C from the silicate melt, quartz begins to crystallize, which proves the approximation to the solidus of the system while maintaining both immiscible melts. It is shown for the first time that the distribution of REE, Y, Sc between coexisting aluminofluoride (salt) and aluminosilicate melts depends on the pressure.
Добавил в систему: Русак Александра Андреевна

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