Structural and mineralogical features of the Visean coal-bearing strata at the Kama coal basin

Abstract

The sections of the coal-bearing strata of the Visean stage of the Kama coal basin in the territory of the Tatarstan republic are considered. It has been established that a coastal-marine terrigenous complex represents the coal-bearing strata. The complex is characterized by alternation of layers of coals, claystones, siltstones and sandstones. Coals lie at the base of the section, forming seams up to 10.0 m thick. Coals are allochthonous, formed due to the denudation erosion of peat deposits on land, the transfer of peat by water flows, and their sediment on the coastal part of the sea basin with normal salinity. The Visean caustobioliths can be classified as brown coals with a low degree of metamorphism. Their composition is dominated by the fusen component with scattered inclusions of liptinite and fusinite. In terms of material and petrographic composition, caustobioliths are classified as fusen varieties of gumite coals. In terms of the content of mineral impurities, the coals are low-medium ash, sulphurous.