2006. 30cm. Pp.115. 52 figures, 19 tables. Paperback. Gold mineralisation in which gold is alloyed with palladium is unusual. In Brazil, however, palladian gold is linked to large-scale gold rushes. In the Brazilian Gold Cycle (1695-1785), a Palaeoproterozoic banded iron formation (itabirite)-hosted, vein-style mineralisation presumedly accounted for much of the gold production from the Ouro Preto area, Minas Gerais. Remarkable examples of this mineralisation style are Gongo Soco and Itabira, Minas Gerais. In recent times, a spectacular gold rush was triggered by bonanza-style ore of palladian gold at Serra Pelada, Carajás mineral province, Pará. Regardless of different geological settings and intrinsic particularities, all three deposits have mineralogical and geochemical features in common that point to highly oxidising (hematite stability field) and relatively shallow-level conditions, typical of hydrothermal selenide vein-type deposits.

3-510-95954-X.  Palladiferous  Gold  Mineralisation  (ouro  Preto)  In  Brazil:  Gongo  Soco,  Itabira  And  Serra  Pelada