Geochemical features of the rocks of the South Permian Cuprous area

Abstract

A study of 11 samples of sandstones, mudstones, limestones from copper occurrences in the villages of Yug and N. Lyady, Perm region, was carried out using the ICP-MS method. It was found that the instrumental rocks are relatively barren, enriched in Cu, Ag, Au, Cd, V, Os, Ru, Rh. An analysis of the results obtained made it possible to show that the Ufa deposits of the Middle Urals are quite comparable with the Tatar deposits of the Orenburg Cis-Urals, differing from them in a larger share in the petrofund of the area of demolition of basic and felsic rocks. It was suggested that some of the Permian copper was transported in the form of vanadates, and the Orenburg copper - in the composition of chromates under strongly oxidizing conditions. The low contents of light REEs in the accompanying mudstones, as well as the low contents of titanium in all sedimentary rocks, suggest that the areas of drift of clastic material were covered by significant weathering  changes.