basin

The research results of the meteorological characteristics and evapotranspiration dynamics in the middle reaches of the Varzob river, a tributary of the Kafernigan river, for the period 1946–2021 are presented. It has been established that temperature is a more active factor in the processes of evapotranspiration. A slight trend of decreasing precipitation at altitudes up to 400 m a. s.

Investigation of the ?productive? intervals in the Gremyachinskoye potassium-salt field shows the potassium and potassium-magnesium salt settling to have been accompanied with large-scale salting out of sodium chloride due to interaction of highly concentrated solutions from that part of the salt-generating basin with the low concentrated ones. The constantly arriving low concentrated brine was peculiar for high contents of sodium chloride. That has resulted in large-scale salting-out of halite as lenses, crusts and randomly shaped clusters.

The paper presents the results of composition examination of the uppermost of the Pogozhskaya rhythmic member from the northern near-slope fringes of the Caspian Region. The potassium-bearing horizon encountered there is determined to have resulted from the demineralization stage overlapping the carnallite and the bischofite stage deposits.