Geologicheskii Vestnik

The article discusses filtering properties of the Neogene-Quaternary clay deposits, their role in the formation of groundwater in general and in solving a number of practical problems associated with various types of construction works, protection of groundwater, etc. The obtained data allow us to conclude that the permeability of clay is defined by a complex of factors, among which the leading role often belongs to the factors that are related to the category of secondary, forming the active porosity and permeability: fracturing, presence of plant remains, etc. Comparison of permeability of rocks, their porosity and clay content indicates the absence of a clear relationship between these parameters. In a process of filtration of mineralized water through clay rocks, crystallization of salts from mineralized water often results in a growth of active porosity of the rocks, and, consequently, in improvement of their filtration properties.

clay rocks, filtration properties, technogenic changes of a permeability, protection of groundwater

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