| | Book (edition) | Republic). W.D. Birch (Australia), Elena Bonaccorsi (Italy), Ernst A.J. Burke (Netherlands), L.J. Cabri (Canada)...M. Dcliens (Belgium). Giancarlo Delia Ventura (Italy), T.S. Ercit (Canada). Alexander Falster (USA)....(Canada). L.A. Groat (Canada). Alessandro Guastoni (Italy), William A. Henderson. Jr. (USA). D.D. Hogarth...(ltaly). Igor Pekov (Russia), atale Perchiazzi (Italy). Ole V. Petersen (Denmark). Fedcrico Pezzotta (ltaly)...compare Braunite and. 'eltnerite, southern slopc of Mount Ochi, I 00 m east of Mil i ncar Karystos. Evvia | | | Book (edition) | over 2,000 years. In addition, there are more complex metallic combinations that yield considerable quantities...single metal (simple ores) or several metals (complex ores). Ores that are generally worked for only...nickel, cobalt, antimony, and man¬ ganese. Some complex ores may yield four or five metals, such as co...deposited as sublimates around volcanic vents, fumaroles, or shallow intrusions. Pveactions Sublimation...economic minerals than is generally realized. It is a complex operation that involves several distinct processes |
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