Some peculiarities of the chemical composition of sulphate rocks from the Brinev gypsum deposits
A.A. Makhnach, G.D. Streltsova, L.F. Gulis, N.D. Mikhailov
E-mail: gstrel@ns.igs.ac.by
E-mail: gstrel@ns.igs.ac.by
The chemical composition of sulphate rocks and rock-forming minerals – gypsum and anhydrite that make up sheet and veinlet ore bodies of producing horizons in the Brinev gypsum deposit has been studied. Variations in the isotopic composition of sulphur which is a part of sulphates have been examined. Some differences have been revealed in the chemical composition of the gypsum structure varieties that are due to genetic peculiarities: the formation mechanism and mineral-forming solution composition. The regular features revealed in variations in the composition and structure of gypsum and anhydrite from sheet deposits and veinlet bodies make possible suggestions about the origin of sulphate rocks and postsedimentary transformations of gypsum strara in the Brinev deposits.