『Abstract
　The carbon and oxygen isotopic compositions in rocks and ores of the Ulutelyak (Bashkortostan) manganese deposit of the Lower Permian (P1kg) are studied. Values of δ¹³C, ‰(PDB) and δ¹⁸O, ‰(SMOW) show the following range: from -3.8 to 3.3 and from 22.9 to 29.6, respectively, in manganese oxide-carbonate ores; from 2.7 to 4.1 and from 28.8 to 29.7, respectively, in non-ore carbonate-clayey interbeds of the ore member; and from 2.8 to 4.5 and from 29.5 to 30.0, respectively, in the underlying and overlying limestones. Lithological features and isotope data suggest that manganese carbonates were formed at the postsedimentary stage of rock transformation due to metasomatic replacement of the primary cyanobacterial sedimentary carbonates by the elisional manganiferous solutions.』

Introduction
Geological setting
Results of lithological and isotopic studies
　Lithological features
　Carbon and oxygen isotopic compositions
Genesis of manganese ores and rocks
Conclusions
Acknowledgments
References