Sulfate Karst Landforms in the Southern Cis-Urals

A. I. Smirnov; P. F. Abdrakhmanov; V. N. Durnaeva

doi:10.31857/S0435428120020078

Sulfate Karst Landforms in the Southern Cis-Urals

A. I. Smirnov, P. F. Abdrakhmanov, V. N. Durnaeva

https://doi.org/10.31857/S0435428120020078

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Abstract

Sulphate karst in the southern Urals develops within the gypsum Kungur layer of the lower Permian. Surface karst manifestations presented funnels, wells, depressions, and karst erosion and karst logs and ravines, karst springs and lakes. Sulphate karst is the most dangerous type of karst for the territory under consideration. Affected areas of the southern Urals surface karst manifestations is directly dependent on the neotectonic stage in the formation of relief. The active stages of their formation alternate with adaptation periods, and the activity of development decreases from the Pliocene to the Holocene, following a decrease in the draining capacity of the karst gypsum stratum. As a result of the assessment of the intensity of the distribution of karst landforms in areas with homogeneous geological and hydrogeological, geomorphological conditions and types of karst, through the total ratio of their area (%) and quantity (PCs. on 1 km²) to the area of the site it was established that the abundance of surface karst phenomena naturally decreases with increasing thickness of cover deposits, increases from weakly permeable cover sediments to overlying rocks, the water permeability of which is due to their porosity, increases from areas with difficult water exchange trenno-karst waters to the participants, where the situation of their intensive water exchange is formed and from young relief surfaces to more ancient ones. The karst danger of both separate parts of the Republic of Bashkortostan and adjacent territories will be assessed by the GIS project “Karst of the southern Urals and the Urals” on the scale of 1:500000.

Keywords

types of karst, Pliocene-Quaternary, the paleo valleys of the rivers, surface karst manifestations, the prevalence

About the Authors

A. I. Smirnov

Institute of Geology UFRC RAS
Russian Federation
Ufa

P. F. Abdrakhmanov

Institute of Geology UFRC RAS
Russian Federation
Ufa

V. N. Durnaeva

Institute of Geology UFRC RAS
Russian Federation
Ufa

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Review

For citations:

Smirnov A.I., Abdrakhmanov P.F., Durnaeva V.N. Sulfate Karst Landforms in the Southern Cis-Urals. Geomorfologiya. 2020;(2):74-84. (In Russ.) https://doi.org/10.31857/S0435428120020078