Authigenic mineral formation at the top of the Clay-Anhydrite strata of the Verkhnekamskoe salt deposit (Izversky area)

Abstract

The mineral composition and textural features of rocks formed at the boundary between the underlying rock salt and the clay-anhydrite strata of the Verkhnekamskoe Salt Deposit have been investigated. The transformations of sulfate-carbonate rocks revealed here are associated with recrystallization processes that occurred during plastic deformations. All this led to the formation of celestine with an admixture of barium, anhydrite, quartz and pyrite. Crystallization of newly formed minerals occurred due to hydrolysis of aluminosilicate material and sulfate reduction.