Nature of breccia rocks at the top of a salt body in the Verkhnekamskoe salt deposit at the Ural foredeep

The formation of sulfate-carbonate-clayey breccia rocks at the top of a salt body on the flank of the Durinsk trough of the Verkhnekamskoe salt deposit is related to tectonic displacement of the suprasalt sequence along a synsedimentary dip-slip of the Durinsk fault during the Early Permian Sheshmin Stage. The presence of relict minerals suggests that the rocks were formed from the insoluble residue of both salt and suprasalt sequences. Zonations revealed in the distribution of newly formed minerals and the breccia composition variation, which is manifested as the removal of calcite sulfate and manganese carbonate, match the weathering profile composition. However, the development of a system of diagonal sliding planes and selective leaching along them indicate that supergene alterations took place during tectonic dislocations.