This work is the frst paper in a series of publications dedicated to mineralogy of the Vorontsovskoe gold deposit in the Northern Urals. The deposit is unique for both Russia and world with regard to the diversity and originality of Tl–Hg–Mn–As–Sb–S mineralization. Based on available literature and our data, we compiled an exhaustive list of 209 mineral species of the deposit, including eight new minerals found by the authors: vorontsovite, ferrovorontsovite, tsygankoite, gladkovskyite, luborzakite, pokhodyashinite, gungerite and auerbakhite. In addition, 40 and 89 minerals are found for the frst time in Russia and the deposit, respectively. Systematic studies of ores revealed nine main mineral assemblages, seven of which are confned to carbonate breccias. They contain more than 70 rare sulfdes, tellurides and sulfosalts including 30, 12 and 9 minerals, where Tl, Hg and Mn are species-defning elements, respectively. In this paper, we characterize the history of study of the deposit, its geological position and structure, ore types, mineral assemblages, and analytical methods.

Key words: Vorontsovskoe deposit, Northern Urals, list of mineral species, ore mineral assemblage, carbonate breccia, Tl-Hg-Mn sulfosalts, new mineral, frst fnd in Russia.

A.V. Kasatkin, Fersman Mineralogical Museum of RAS, Leninsky pr. 18/2 Moscow, 119071 Russia; anatoly.kasatkin@gmail.com;

S.Yu. Stepanov, Institute of Geology and Geochemistry UB RAS, ul. Akademika Vonsovskogo 15, Yekaterinburg, 620016 Russia;

M.V. Tsyganko, Mineralogical Museum «Shtufnoi Kabinet», ul. Vatutina 17a, Severouralsk, Sverdlovsk oblast, 624480 Russia;

R. Skoda, Masaryk University, Kotlarska 2, Brno, 61137 Czech Republic;

F. Nestola, University of Padova, Via Gradenigo 6, Padova, 35131 Italy;

J. Plasil, Institute of Physics ASCR, v.v.i., Na Slovance 1999/2, Prague, 18221 Czech Republic;

E. Makovicky, Institute of Physics ASCR, v.v.i., Na Slovance 1999/2, Prague, 18221 Czech Republic;

A.A. Agakhanov, Fersman Mineralogical Museum of RAS, Leninsky pr. 18/2 Moscow, 119071 Russia;

R.S. Palamarchuk, South Urals Federal Research Center of Mineralogy and Geoecology UB RAS, Institute of Mineralogy, Miass, Chelyabinsk oblast, 456317 Russia

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