Abstract
The article presents the analytical data on lengenbachite, a rare As–Pb sulfosalt, which was found in sulfde ores of the Kochkovskoe gold deposit in Zabaykalsky Krai. Until recent, lengenbahitе was found only in the Lengenbach quarry (Switzerland), Negus, Kohn (Canada) and Sherlovaya Gora (Zabaikalsky Krai) deposits. The mineral is identifed in two sulfde aggregates located in the low-Fe sphalerite of gold-quartz-carbonate-polymetallic stage. Aggregate 1 is composed of jordanite with lengenbachite inclusions (Ag4.89Cu1.25Pb18.68As12.46S39.00, on average) and galena, which is overgrown by arsenopyrite and Ag-bearing tennantite. Aggregate 2 consists of an jordanitе grain with lengen-bachite inclusions (Ag5.23Cu0.79Pb18.57As11.93S39.00 , on average). Figures 5. Tables 3. References 17.
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