Document Type: Original paper (Research paper)
Manager of Geoscince Museum of mashhad
Manager of laboratory of Geological Survey of Iran, North East territory
The Rosasite group is a family of rare secondary minerals occurring in oxidized zones in Cu-Zn ore deposits. This group includes seven minerals (zincrosasite, for instance) that are formed by a chemical reaction between Zn bearing solutions and Cu minerals. The Qaleh-Zari mine, which is a well-known copper mine in Eastern Iran, is located in South Khorasan province. This mine is a polymetallic deposit of Copper, Zinc, Iron and Lead sulfides, carbonates and oxides. Limitedly, there is a mineral which appears in globular and compact mammillary to botryoidal crusts on hemimorphite in oxidation zones. The analyses conducted in this study determined that this mineral belongs to the rosasite group. Up to now, the presence of rosasite group minerals and mineralogical studies on them have never been reported in this deposit. Scanning Electron Microscope (SEM), Atomic Absorption Spectroscopy (AAS), and other mineralogical results suggested that the blue mammillary mineral is zincrosasite with Zn= 9.1 % and Cu=3.42%.