CHAMBERSITE OF THE VERKHNEKAMSKOE SALT DEPOSIT
The chambersite crystals found in Verkhnekamskoe Salt Deposit, Perm Region, Russia, are described in detail. It occur in euhedral pseudocubic and pseudotet-rahedral crystals, spherulites in the upper part of carnallite zone and blanket rock salt. Molecular proportion is (Mn 1 08-2 72Fe 0 26-1 7Mg 0-034Ca 0-0 09)(B 7O 13)Cl. Regenerated crystals were also detected. Their chemical composition range from boracite-ericaite (centre) to chambersite (edge). Revealed signs of borates allow to speak about their formation in the final halokinesis stage during diagenesis. The distribution of iron and manganese within crystals give reason to assume the existence of vertical and lateral zoning in halmeic basin.