Equilibrium Composition of Phases in Comelting of Natural Tecto-, Meta-, and Orthosilicates by the Example of Olivine Gabbronorite

Resumo

By the example of olivine gabbronorite, a basic plutonic rock of the gabbroid family, the effect of temperature and the redox properties of the crystallization atmosphere on the equilibrium composition of the formed phases was studied by physicochemical modeling. Brief data were presented on the chemical composition of the rock-forming minerals and their effect on the properties of the rock. Specific features of heating, melting, and crystallization of olivine gabbronorite were considered with taking into account the external conditions and the mutual influence of the minerals. The possibility of modifying the chemical and mineral compositions of olivine gabbronorite was shown. Recommendations were given on choosing a method for modifying the initial composition of olivine gabbronorite.