Ni-Bi-As occurrence, Čierna Lehota, Suchý and Malá Magura Mts, Trenčín region, Slovakia

The Ni-Bi-As mineralization is situated approximately 2 km SSE from the village Čierna Lehota. Mineralization is situated in a narrow zone of black shales and intensively graphitized rocks (graphitic-biotitic gneisses, graphitic metaquartzite).

References:
- Mikuš, T., Pršek, J., Chovan, M., Makovicky, E. (2002): New type of hydrothermal mineralization in the Tatric tectonic unit (Western Carpathians): Ni-Bi-As mineral assemblage in the black shales. Geol. Carpath., 53, special issue. Proceedings of the XVII Congress of CBGA, Bratislava.
- Pršek, J., Mikuš, T., Makovicky, E., Chovan, M. (2005): Cuprobismutite, kupčíkite, hodrushite and associated sulfosalts from the black shale hosted Ni-Bi-As mineralization at Čierna Lehota, Slovakia. Eur. J. Mineral., 17, 155-162.