Carboniferous Dombarovsk anthracite deposits, South Urals, Russia

摘要

Our investigations are devoted to the study of the extent of transformation of the Lower Carboniferous sedimentary complexes located on the Ural eastern slope. These are similar in age and composition, but differ in tectonic setting, dislocation and extent of metamorphic transformation. Lower Carboniferous coal-bearing sedimentary complexes are widespread over the entire eastern slope of the Urals. The Man'in coal occurrence is located to the north. The eastern part of the Sverdlovsk region in the middle Urals host several coal deposits in the Egorshin-Kamensk district (near Yekaterinburg). Poltavo-Bredinsk district and Dombarovsk deposits are located in the south of eastern slope of the Urals. The Lower Carboniferous coal-bearing formations vary in thickness averaging 700-900 m. Coal rank increases from north to south, according to vitrinite reflectance values (R_o). High volatile matter bituminous coals were recovered in the Man'in coal occurrence (R_o=0.75-1.0%). There are low volatile matter bituminous coals and anthracites in the Egorshin-Kamensk coal district (R_o=2.2-3.5%) and anthracites of higer rank in the Dombarovsk deposits (R_o=4.7-5.3%).