『Abstract
　New data on the Akkermanov deposit characterized by specific structure and composition of primary (carbonate) and secondary (manganese oxide) ores are presented. Distribution of mineralization in host rocks and weathering crusts is considered. It is shown that manganiferous carbonate rocks, which host orebodies, formed in a marine basin with well-aerated bottom waters. Oxide ores are mainly composed of crystalline pyrolusite produced by multiple processes of the oxidation of manganese compounds. In this respect, the Akkermanov deposit differs drastically from all manganese deposits developed in Russia and Ukraine.』

(Introduction)
Overview of geological characteristics of the Akkermanov ore district
Lithological characteristics of ore-bearing rocks
　The lower horizon
　The middle horizon
　The upper horizon
Structure and composition of the weathering crust
　Kaolinite zone
　Monmorillonite-hydromica zone
　Leaching (decomposition and disintegration) zone
Morphology of orebodies and composition of ores
　Manganese carbonate ores
Manganese oxide ores
　Pyrolusite ores
　Cryptomelane ores
　Goethite-pyrolusite ores
　Todorokite ores
Mineral composition of manganese oxide ores
　Pyrolusite
　Cryptomelane
　Romanechite
　Vernadite
　Todorokite
　Manganite
　Goethite
　Lithiophorite
Formation conditions of manganiferous rocks and ores
Conclusions
References