Physicochemical Modeling and Experimental Study of the Si–Al–Ti–Fe–Mg–Ca–Na–K–O System

Resumo

The melting and crystallization of the natural system Si–Al–Ti–Fe–Mg–Ca–Na–K–O, which represents andesite-basalt, an effusive medium rock that contains 35–95% glass, were studied by physicochemical modeling and experimentally. The presence of volcanic glass and the non-equilibration of phenocrystal minerals with the major andesite-basalt composition hamper the obtainment of data on the mineral compositions of such rocks and on the behavior of their melts. The methods described, based on chemical analysis data, make it possible to calculate the melt compositions obtainable in various atmospheres, thereby making it possible to select the most rational use of igneous rocks in the production of mineral fiber, stone ceramics, and cast-stone articles.