Data on geological setting and mineralogy of the Famennian stratiform Ba-Pb-Zn and Fe-Mn ores of the Zhayrem ore district in Central Kazakhstan are given. The ores are confned to the Devonian rift structure flled by various volcanosedimentary rocks (D3fr-C1t). The layers and lenses of complex Ba-Pb-Zn and BaSO4, Pb-BaSO4, and Fe-Mn ores are hosted by carbonaceous clayey-siliceous-carbonate rocks, reef limestones, and siliceous limestones, respectively. The Fe-Mn mineralization occurs above Ba-Pb-Zn and BaSO4 mineralization. The deposits tend to consedimentary fault zones in the rift basement. It is suggested that the deposits belong to the SEDEX type and were formed by fuids circulated in the sedimentary strata and transported ore elements on the seafoor.

Figures 3. References 14.

Key words: zinc-lead, barite and Fe-Mn ores, metal-bearing sediments, Central Kazakhstan.

A.I. Brusnitsyn, St. Petersburg State University, Universitetskaya nab. 7, St. Petersburg, 199034 Russia; brusspb@yandex.ru

E.N. Perova, St. Petersburg State University, Universitetskaya nab. 7, St. Petersburg, 199034 Russia; 

O.S. Vereshchagin, St. Petersburg State University, Universitetskaya nab. 7, St. Petersburg, 199034 Russia;

S.N. Britvin, St. Petersburg State University, Universitetskaya nab. 7, St. Petersburg, 199034 Russia;

E.F. Letnikova, Institute of Geology and Mineralogy SB RAS, pr Akademika Kopyuga 3, Novosibirsk, 630090 Russia

S.I. Shkolnik, Institute of the Earth s Crust SB RAS, ul. Lermontova 128, Irkutsk, 664033 Russia

A.V. Ivanov, Irkutsk State University, ul. Karla Marksa 1, Irkutsk, 664033 Russia

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