The nature and geochemical role of density convection in the East European evaporite basin

摘要

The role of the gravitation factor in the formation of the hydrostratisphere in the East European evaporate basin is considered. The features of Paleozoic sedimentation are characterized, as are the mechanism and litho-hydrogeochemical effects of the density concentration convection of mother brines of the Low-Permian salt-bearing basin to the underlying terrigenous-carbonate Paleozoic and Proterozoic layers. It is shown that the convection processes resulted in the formation of multicomponent calcium chloride brines prevailing in the sedimentary layer of the basis; they also caused the metasomatic dolomitization of limestones with growth of their filtration capacity.