Photographs of natural platinum ores and palladium mineral specimens mined Nevada Outback's gold
Mineral deposit: Mineral deposit, aggregate of a mineral in an unusually high concentration. About half of the known chemical elements possess some metallic properties. The term metal, however, is reserved for those chemical elements that possess two or more of the characteristic physical properties of metals
Henry Kissinger Bloody Hands Full of Gold By Cheryl Seal c. 2002 The News Insider Cheryl Seal Posted With Permission 1212
Millions of tonnes of lowgrade ore and copperrich tailings await the development of an efficient and economic bioleach process for chalcopyrite (CuFeS 2).The bioleaching of chalcopyrite in situ and in dumps is a practical option only because the low and slow recoveries are countered by the low processing costs (Schnell, 1997).Not surprisingly, the bioleaching .
Leaching and recovery of zinc and copper from brass slag by sulfuric acid