 | | Journal (article/letter/editorial) | | Quadrilátero Ferrífero of Minas Gerais, Brazil: petrographic evidence from the Gongo Soco iron ore deposit A...high-grade soft hematite ore from Gongo Soco, Minas Gerais, Brazil, consists of laminae of platy hematite... Pyrolusite and a Mn–Ba oxide, possibly 1 romanèchite, occur as late open-space infilling. The ore...Rua Coelho Neto 32/apt 704, 22231-110 Rio de Janeiro–RJ, Brazil. Orlando Garcia Rocha Filho (orlando.rocha@cvrd...is with Mina do Gongo Soco s/n, caixa postal 22, 35970-000 Barão de Cocais–MG, Brazil. Richard David Jones |  | | Journal (article/letter/editorial) | | platinum from ouro preto-bearing mineralisation in Brazil Alexandre Raphael Cabral a,b,⁎, Bernd Lehmann a...rushes in Brazil (Minas Gerais and Serra Pelada). The auriferous mineralisations of Gongo Soco and Itabira...Itabira, Minas Gerais, and Serra Pelada, Pará, have Pd–O-bearing, dark-coloured ferruginous coatings on...empirical Pd5(Hg,Sb,Ag)2Se6 and (Pd,Sb,Ag,Hg)5Se4, at Gongo Soco; palladseite, ideally Pd17Se15, and sudovikovite...minerals; Ouro preto; Gongo Soco; Itabira; Serra Pelada; Brazil 1. Introduction Brazil had two major gold |  | Cabral, A. R., Lehmann, B., Sattler, C. D., Pires, F. R. M., Kaneko, K. (2002) Hg–Tl-bearing manganese oxide from Conta História manganese deposit, Quadrilátero Ferrifero, Minas Gerais, Brazil. Applied Earth Science, 111 (2) 123-127 doi:10.1179/aes.2002.111.2.123 | Journal (article/letter/editorial) | | manganese deposit, Quadrilátero Ferrifero, Minas Gerais, Brazil occur in the Palaeoproterozoic Itabira...Ferrífero, the world-class iron district of Minas Gerais, Brazil, numerous manganese oxide deposits Table...Itabira Iron Formation is the middle unit of the Minas Supergroup, which includes the Caraça Group, the...(dashed lines)37 in Quadrilátero Ferrífero of Minas Gerais basal clastic unit, and the Piracicaba Group...subordinate itabirite and dolomitic phyllite. The Minas Supergroup rests unconformably on the Archaean Rio |  | | Journal (article/letter/editorial) | | ENRICHMENT IN THE SERRA PELADA Au-Pd-Pt DEPOSIT, PARÁ, BRAZIL ALEXANDRE RAPHAEL CABRAL,1,2,† RAY BURGESS,3 AND...triggered the gold rush to Serra Pelada in northern Brazil. The mineralization occurs in goethite-rich tectonic...spectacular gold rush in the Amazonia region of Brazil (Fig. 1). In the early 1980s, up to one hundred...Mn oxide matrix, compositionally analogous to romanèchite, is characterized by an intergrowth of palladiferous...assemblage of Pd-poor gold, isomertieite, and romanèchite forms masses that overprint the goethite-rich |  | Cabral, A. R., Lehmann, B., Kwitko, R., Costa, C. H. C. (2002) The Serra Pelada Au-Pd-Pt deposit, Carajas mineral province, northern Brazil: reconnaissance mineralogy and chemistry of very high grade palladian gold mineralization. Economic Geology, 97 (5) 1127-1138 doi:10.2113/gsecongeo.97.5.1127 | Journal (article/letter/editorial) | | Au-Pd-Pt DEPOSIT, CARAJÁS MINERAL PROVINCE, NORTHERN BRAZIL: RECONNAISSANCE MINERALOGY AND CHEMISTRY OF VERY... KWITKO, Companhia Vale do Rio Doce—CVRD, Centro de Desenvolvimento Mineral, Rodovia BR 262/ km 296,...Santa Luzia-MG, Brazil AND C.H. CRAVO COSTA Companhia Vale do Rio Doce—CVRD, Diretoria de Metais Nobres...51, Serra dos Carajás, 68516-000 Parauabepas-PA, Brazil Abstract A historic drill core from the Serra...palladium and platinum by fire assay at Nomos, Rio de Janeiro (CVRD, internal files). The upper 40 m of |  | Cabral, A. R., Lehmann, B., Kwitko-Ribeiro, R., Costa, C. H. C. (2002) Palladium and platinum minerals from the Serra Pelada Au-Pd-Pt deposit, Carajas mineral province, northern Brazil. The Canadian Mineralogist, 40 (5) 1451-1463 doi:10.2113/gscanmin.40.5.1451 | Journal (article/letter/editorial) | | Au–Pd–Pt DEPOSIT, CARAJÁS MINERAL PROVINCE, NORTHERN BRAZIL ALEXANDRE RAPHAEL CABRAL§ AND BERND LEHMANN Institut...Clausthal-Zellerfeld, Germany ROGERIO KWITKO-RIBEIRO Centro de Desenvolvimento Mineral, Companhia Vale do Rio Doce...33030-970 Santa Luzia – MG, Brazil CARLOS HENRIQUE CRAVO COSTA Diretoria de Metais Nobres, Companhia Vale...Serra dos Carajás, 68516-000 Parauabepas – PA, Brazil ABSTRACT The Serra Pelada garimpo (1980–1984)...mineral province, Brazil. SOMMAIRE Le garimpo de Serra Pelada (1980–1984) a été le site de la ruée vers l’or |  | | Journal (article/letter/editorial) | | Richterite Riebeckite Rinkite Rodalquilarite Romanèchite Romeite Roquesite Roscoelite Roselite Rustenburgite...hanging wall. During a subsequent mining period, the mine was re-opened to recover sideritic parts of the...you look for a mine look near a mine”. This includes the imperative “if you look for a mine look for smelting...gold-bearing quartz veins in the southern Para State, Brazil (Angelica et al., 1997). Chromium muscovite named...conglomerate-hosted U deposits of the Randtype at Jacobina, Brazil (pers. com. P. Laznicka). Chromium-bearing garnet | | | Journal (article/letter/editorial) | | Richterite Riebeckite Rinkite Rodalquilarite Romanèchite Romeite Roquesite Roscoelite Roselite Rustenburgite...hanging wall. During a subsequent mining period, the mine was re-opened to recover sideritic parts of the...you look for a mine look near a mine”. This includes the imperative “if you look for a mine look for smelting...gold-bearing quartz veins in the southern Para State, Brazil (Angelica et al., 1997). Chromium muscovite named...conglomerate-hosted U deposits of the Randtype at Jacobina, Brazil (pers. com. P. Laznicka). Chromium-bearing garnet |
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