Cervelleite, Ag₄TeS, from three localities in Romania, substitution of Cu, and the occurrence of the associated phase, Ag₂Cu₂TeS

Authors: Cook, Nigel J.; Ciobanu, Cristiana L.

Source: Neues Jahrbuch für Mineralogie - Monatshefte, Volume 2003, Number 7, 1 July 2003 , pp. 321-336(16)

Publisher: E. Schweizerbart'sche Verlagsbuchhandlung

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Abstract:

Compositional and paragenetic data are reported for cervelleite, ideally Ag₄TeS, from three new occurrences in Romania: from Upper Cretaceous skarn mineralisation at Ba breve

i¸ta Bihor, Northern Apuseni Mts. and Ocna de Fier, Banat, and from Neogene hydrothermal Au-vein mineralisation at Larga, Metalliferi Mts. Cervelleite from the two skarn occurrences contains significant amounts of Cu. Together with previously published compositional data, limited solid solution from Ag₄TeS to approximately (Ag_3.2Cu_0.8)₄TeS can be recognised. Closely associated with cervelleite in both skarn occurrences is an additional phase, Ag₂Cu₂TeS, which we believe is a possible new quaternary mineral in the Ag–Cu–Te–S system.

Keywords: CERVELLEITE; UNNAMED MINERAL; ROMANIA; BAITA BIHOR; LARGA; OCNA DE FIER; AG-CU-TE-S SYSTEM

Document Type: Regular paper

DOI: http://dx.doi.org/10.1127/0028-3649/2003/2003-0321

Publication date: 2003-07-01