Аннотация:The interaction of silicate substances with salt solutions at 650-850°C and 1 kbar has been experimentally shown. Changing the pH and chemical composition of the solution is interpreted from the perspective of heterogenization of water-salt systems according to the type: (1) homogeneous fluid → steam + liquid and (2) homogeneous fluid → liquid 1 + liquid 2. Due to hydrolysis by a reaction of the type: NaCl +H2O ↔ NaOH↓ + HCl↑ alkaline and acid components are formed. At the same time, an interphase distribution of acidic and alkaline hydrolysis products occurs, while alkaline components enrich the denser phase, while acidic components go into a less dense phase. This results in alkaline silicate melts enriched in water and salt components. Alkaline silicate melts formed during fluid heterogenization can extract ore elements (Ta, Nb) from host rocks and transport them to the apical parts of lithium fluoride granite bodies. Our proposed model of the post-magmatic process with the participation of a heterogenizing fluid allows us to understand the formation of ore differences of granite rocks – apogranites.
