GENERATION CONDITIONS AND OCCURRENCE REGULARITIES OF THE BORATE IN THE PERMIAN HALOID BASIN WITHIN THE CASPIAN DEPRESSION

Abstract

The actual material on the distribution of the borates in Permian boron-ore provinces in the East European basin is characterized. An analysis of the distribution of boron minerals in the saliferous layers of the Caspian Depression shows that their composition has varied significantly from magnesium (western part of the basin) to the magnesium-calcium and strontium (South-West) to sodium-calcium, and possibly sodium (South). The main sources of the boron were concentrated sea brine and presumably thermal solutions which could go to the basin along the system of the intersecting deep faults. Given the lithological association of borates to evaporite deposits in haloid basins, the four genetic groups of boron minerals have been identified: evaporite, supergene, «through», presumably volcanogenic-sedimentary.

Keywords

• борная минерализация
• прикаспийская впадина
• пермский галогенез прикаспия