|
|
 |
|||||||||||||||||
|
|||||||||||||||||
 |
|||||||||||||||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
1 Institut für Mineralogie und Mineralische Rohstoffe, Technische Universität Clausthal, Adolph-Roemer-Str. 2A, D-38678 Clausthal-Zellerfeld, Germany
2 Centro de Desenvolvimento Mineral, Companhia Vale do Rio Doce, Rodovia BR 262 / km 296 – Caixa Postal 09, 33030–970 Santa Luzia-MG, Brazil
3 1636 East Skyline Drive, Tucson, AZ 85178, USA
4 Departamento de Geologia, Universidade Federal do Rio de Janeiro, Cidade Universitária, 21949–900 Rio de Janeiro-RJ, Brazil
5 Mineração Socoimex Ltda., Fazenda Gongo Soco, Caixa Postal 42, 34800-000 Caeté-MG, Brazil
* E-mail: cabral{at}min.tu-clausthal.de
New data on the Gongo Soco palladium-oxygenated compounds are presented for the first time since the work of Johnson and Lampadius (1837). A variety of PdO species is documented, always in association with Cu, Fe and Mn, and includes Pd(OH)2 or PdO.H2O, and phases with metal excess in relation to oxygen, interpreted as metastable. Their remarkable occurrence in ‘ouro preto’ (black gold) and jacutinga (auriferous itabirite/iron ore) is the result of mertieite-II alteration. It involves leaching of Sb and As, limited removal of Pd, and incorporation of Cu, Mn and Hg into PdO species. The locus of Hg-bearing PdO species in microfractures parallel to the enclosing gold-mineralized shear band suggests at least one low-temperature hydrothermal generation. The presence of a halite crystal attached to gold testifies to the involvement of Cl-saturated hydrothermal fluids in the oxidizing environment of jacutinga formation.
KEYWORDS: PdO species, mertieite-II, jacutinga, ‘ouro preto’, Gongo Soco, Itabira Iron Formation, Quadrilátero Ferrífero, Brazil
This article has been cited by other articles:
|
|
 |
|
  F. Melcher, T. Oberthur, and J. Lodziak MODIFICATION OF DETRITAL PLATINUM-GROUP MINERALS FROM THE EASTERN BUSHVELD COMPLEX, SOUTH AFRICA Can Mineral, October 1, 2005; 43(5): 1711 - 1734. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. R. Cabral, B. Lehmann, D. Grambole, and F. Herrmann HYDROGEN IN A NATURAL Pd O COMPOUND FROM GONGO SOCO, MINAS GERAIS, BRAZIL Can Mineral, April 1, 2004; 42(2): 689 - 694. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. R. Cabral, A. R. Cabral, and B. Lehmann A two-stage process of native palladium formation at low temperatures: evidence from a palladian gold nugget (Gongo Soco iron ore mine, Minas Gerais, Brazil) Mineralogical Magazine, June 1, 2003; 67(3): 453 - 463. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. R. Cabral, B. Lehmann, R. Kwitko-Ribeiro, R. D. Jones, and O. G. Rocha Filho ON THE ASSOCIATION OF PALLADIUM-BEARING GOLD, HEMATITE AND GYPSUM IN AN OURO PRETO NUGGET Can Mineral, April 1, 2003; 41(2): 473 - 478. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. R. Cabral, B. Lehmann, R. Kwitko-Ribeiro, and C. H. C. Costa PALLADIUM AND PLATINUM MINERALS FROM THE SERRA PELADA Au-Pd-Pt DEPOSIT, CARAJAS MINERAL PROVINCE, NORTHERN BRAZIL Can Mineral, October 1, 2002; 40(5): 1451 - 1463. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. R. Cabral, A. R. Cabral, B. Lehmann, R. Kwitko, and C.H. C. Costa 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, August 1, 2002; 97(5): 1127 - 1138. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. Kwitko, A. R. Cabral, B. Lehmann, J.H. G. Laflamme, L. J. Cabri, A. J. Criddle, and H. F. Galbiatti HONGSHIITE, PtCu, FROM ITABIRITE-HOSTED Au Pd Pt MINERALIZATION (JACUTINGA), ITABIRA DISTRICT, MINAS GERAIS, BRAZIL Can Mineral, April 1, 2002; 40(2): 711 - 723. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. R. Cabral, B. Lehmann, R. Kwitko, H. F. Galbiatti, and M. C. Pereira Palladseite and its oxidation: evidence from Au-Pd vein-type mineralization (jacutinga), Caue iron-ore mine, Quadrilatero Ferrifero, Minas Gerais, Brazil Mineralogical Magazine, April 1, 2002; 66(2): 327 - 336. [Abstract] [Full Text] [PDF]
|
|
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
