 | | Journal (article/letter/editorial) | | Seleniferous minerals of palladium and platinum from ouro preto-bearing mineralisation in Brazil Alexandre Raphael...of palladiferous gold that triggered two major gold rushes in Brazil (Minas Gerais and Serra Pelada)...Gongo Soco and Itabira, Minas Gerais, and Serra Pelada, Pará, have Pd–O-bearing, dark-coloured ferruginous...coatings on gold (ouro preto). Depending upon the amount of palladium alloyed with gold, a number of...of seleniferous minerals of palladium and platinum can be found: chrisstanleyite, Ag2Pd3Se4, a phase analogous |  | Cabral, A. R., Lehmann, B., Kwitko-Ribeiro, R., Jones, R. D., Rocha Filho, O. G. (2003) ON THE ASSOCIATION OF PALLADIUM-BEARING GOLD, HEMATITE AND GYPSUM IN AN OURO PRETO NUGGET. The Canadian Mineralogist, 41 (2) 473-478 doi:10.2113/gscanmin.41.2.473 | Journal (article/letter/editorial) | | ON THE ASSOCIATION OF PALLADIUM-BEARING GOLD, HEMATITE AND GYPSUM IN AN OURO PRETO NUGGET ALEXANDRE RAPHAEL...296, Caixa Postal 09, 33030-970 Santa Luzia – MG, Brazil RICHARD D. JONES 1636 East Skyline Drive, Tucson...– MG, Brazil ABSTRACT An ouro preto (black gold) nugget from Gongo Soco, Minas Gerais, Brazil, has a...assemblage of hematite and gypsum hosted by Pd-bearing gold. The hematite inclusion is microfractured and...of the gold is a darkcolored material that consists partially of Pd–O with relics of palladium arsenide-antimonides |  | Cabral, A. R., Lehmann, B., Grambole, D., Herrmann, F. (2004) HYDROGEN IN A NATURAL Pd O COMPOUND FROM GONGO SOCO, MINAS GERAIS, BRAZIL. The Canadian Mineralogist, 42 (2) 689-694 doi:10.2113/gscanmin.42.2.689 | Journal (article/letter/editorial) | | A NATURAL Pd–O COMPOUND FROM GONGO SOCO, MINAS GERAIS, BRAZIL ALEXANDRE RAPHAEL CABRAL§ AND BERND LEHMANN...Germany ABSTRACT The existence of hydrogen in Pd–O-bearing aggregates, which together with iron oxides form...dark encrustation of an ouro preto nugget of Gongo Soco, Minas Gerais, Brazil, is confirmed by elastic...microbeam (micro-ERDA). Hydrogen is lost from Pd–O-bearing areas during the micro-analyses, but not from goethite...transformation to native palladium. Keywords: hydrogen, elastic recoil detection analysis, Pd–O-bearing compound, ouro |  | Cabral, A. R., Lehmann, B., Tupinamba, M., Schlosser, S., Kwitko-Ribeiro, R., de Abreu, F. R. (2009) THE PLATINIFEROUS Au-Pd BELT OF MINAS GERAIS, BRAZIL, AND GENESIS OF ITS BOTRYOIDAL Pt-Pd AGGREGATES. Economic Geology, 104 (8) 1265-1276 doi:10.2113/gsecongeo.104.8.1265 | Journal (article/letter/editorial) | | COMMUNICATIONS THE PLATINIFEROUS Au-Pd BELT OF MINAS GERAIS, BRAZIL, AND GENESIS OF ITS BOTRYOIDAL Pt-Pd AGGREGATES...Xavier 524 s. A4016, 20550-050 Rio Janeiro-RJ, Brazil 4 Curt-Engelhorn-Zentrum 5 Centro Archäometrie...Luzia-MG, Brazil 6 Votorantim Metais, Praça Ramos de Azevedo 206, 01037-010 São Paulo-SP, Brazil Abstract...Au-Pd-Pt belt in Minas Gerais, Brazil, which hosts hydrothermal Pd-Pt−bearing gold mineralization in...Serra do Espinhaço). The hydrothermal Pd-Pt−bearing gold mineralization, locally known as jacutinga, |  | | Journal (article/letter/editorial) | | com/locate/oregeorev Brittle microstructures in gold nuggets: A descriptive study using backscattered...Doce, BR 381/km 450, 33040-900 Santa Luzia-MG, Brazil Mina do Gongo Soco, Companhia Vale do Rio Doce...Caixa Postal 22, 35970-000 Barão de Cocais-MG, Brazil b d Received 9 September 2005; accepted 6 March...March 2006 Available online 4 October 2007 Abstract Gold nuggets from specular hematite-rich, sulphide-free...Quadrilátero Ferrífero of Minas Gerais, Brazil, have inclusions of palladium arseno-antimonides (isomertieite |  | Cabral, A. R., Beaudoin, G., Kwitko-Ribeiro, R., Lehmann, B., Polonia, J. C., Choquette, M. (2006) PLATINUM PALLADIUM NUGGETS AND MERCURY-RICH PALLADIFEROUS PLATINUM FROM SERRO, MINAS GERAIS, BRAZIL. The Canadian Mineralogist, 44 (2) 385-397 doi:10.2113/gscanmin.44.2.385 | Journal (article/letter/editorial) | | PLATINUM–PALLADIUM NUGGETS AND MERCURY-RICH PALLADIFEROUS PLATINUM FROM SERRO, MINAS GERAIS, BRAZIL Alexandre...296, Caixa Postal 09, 33030-970 Santa Luzia – MG, Brazil Bernd LEHMANN Institut für Mineralogie und Mineralische...Carlos POLÔNIA Rua Paris 105, 34800-000, Caeté – MG, Brazil Marc CHOQUETTE Département de géologie et de génie...grains of platinum and palladium from Córrego Bom Sucesso, Serro, Minas Gerais, Brazil, were investigated...core-to-rim compositional zoning in platinum, palladium and mercury contents. One grain is noteworthy |  | Galbiatti, H.F., Fonseca, M.A., Pereira, M.C., Polônia, J.C. (2007) Structural control of Au–Pd mineralization (Jacutinga): An example from the Cauê Mine, Quadrilátero Ferrífero, Brazil. Ore Geology Reviews, 32 (3) 614-628 doi:10.1016/j.oregeorev.2005.03.020 | Journal (article/letter/editorial) | | example from the Cauê Mine, Quadrilátero Ferrífero, Brazil H.F. Galbiatti a,⁎, M.A. Fonseca b , M.C. Pereira...Rio Doce, Minas de Itabira, Serra do Esmeril S/N, Mina Cauê, 35900-900 Itabira, MG, Brazil b Departamento...Geologia, Universidade Federal de Ouro Preto. 35.400-000, Ouro Preto, MG, Brazil Received 1 December 2001; accepted...northeastern part of Quadrilatéro Ferrífero, Minas Gerais. Structural analysis reveals two important features...by Elsevier B.V. Keywords: Gold; Jacutinga; Quadrilátero Ferrífero; Brazil 1. Introduction Ancient miners |  | Cabral, A. R., Lehmann, B., Kwitko, R., Galbiatti, H. F., Pereira, M. C. (2002) Palladseite and its oxidation: evidence from Au-Pd vein-type mineralization (jacutinga), Cauê iron-ore mine, Quadrilátero Ferrífero, Minas Gerais, Brazil. Mineralogical Magazine, 66 (2) 327-336 doi:10.1180/0026461026620033 | Journal (article/letter/editorial) | | iron-ore mine, Quadrila¤tero Ferr|¤ fero, Minas Gerais, Brazil A. R. CABRAL1,*, B. LEHMANN1, R. KWITKO2...Luzia-MG, Brazil 3 Diretoria de Metais Nobres, Companhia Vale do Rio Doce, 35900-900 Itabira-MG, Brazil ABSTR...ABSTR ACT Palladseite (palladium selenide) and palladian gold occur as euhedral inclusions in specularite...1.9 wt.%), and Ag (0.3 0.5 wt.%). The palladian gold contains up to 6 wt.% Pd, and minor Cu and Ag. Isomertieite...palladseite alteration, Pd-O species, palladian gold, sudovikovite, jacutinga, Cauê iron-ore mine, Itabira |  | Cabral, A. R., Lehmann, B., Galbiatti, H. F., Rocha Filho, O. G. (2006) Evidence for metre-scale variations in hematite composition within the Palaeoproterozoic Itabira Iron Formation, Minas Gerais, Brazil. Mineralogical Magazine, 70 (5) 591-602 doi:10.1180/0026461067050352 | Journal (article/letter/editorial) | | Palaeoproterozoic Itabira Iron Formation, Minas Gerais, Brazil A. R. CABRAL1,*, B. LEHMANN2, H. F. GALBIATTI3...Companhia Vale do Rio Doce, Itabira MG, 35900-900, Brazil 4 Companhia Vale do Rio Doce, Fazenda Gongo Soco...Soco, Barão de Cocais MG, 35970-000, Brazil 2 ABSTR ACT Hematite is a mineral the chemical composition...Iron Formation, Quadrilátero Ferrı́fero of Minas Gerais, Brazil, has revealed distinct variations in chemical...spatial relationship to hematitic, palladiferous gold-bearing veins (known as ‘jacutinga’), occurring either |  | Cabral, A. R., Lehmann, B., Kwitko, R., Jones, R. D. (2002) Palladian gold and palladium arsenide–antimonide minerals from Gongo Soco iron ore mine, Quadrilátero Ferrífero, Minas Gerais, Brazil. Applied Earth Science, 111 (1) 74-80 doi:10.1179/aes.2002.111.1.74 | Journal (article/letter/editorial) | | Palladian gold and palladium arsenide–antimonide minerals from Gongo Soco iron ore mine, Quadrilátero...Quadrilátero Ferrífero, Minas Gerais, Brazil Downloaded by [RMIT University Library] at 12:47 15 March 2016 A...iron ore deposit was one of the most famous gold mines in Brazil in the nineteenth century. The iron ore...formation. The coarse-grained gold particles are characteristically palladium-bearing and commonly have inclusions...inclusions of palladium arsenide–antimonides, whose compositions are close to mertieite -II and isomertieite |  | Lüders, Volker, Romer, Rolf L., Cabral, Alexandre R., Schmidt, Christian, Banks, David A., Schneider, Jens (2005) Genesis of itabirite-hosted Au–Pd–Pt-bearing hematite-(quartz) veins, Quadrilátero Ferrífero, Minas Gerais, Brazil: constraints from fluid inclusion infrared microthermometry, bulk crush-leach analysis and U–Pb systematics. Mineralium Deposita, 40 (3) 289-306 doi:10.1007/s00126-005-0024-8 | Journal (article/letter/editorial) | | itabirite-hosted Au–Pd–Pt-bearing hematite-(quartz) veins, Quadrilátero Ferrı́fero, Minas Gerais, Brazil: constraints...lowstrain domain. Pb–Pb and U–Pb systematics of gold, hematite and hematite-hosted fluid inclusions in...microscopy Æ U–Pb Æ Jacutinga veins Æ Au–Pd–Pt Æ Minas Gerais Introduction Present address: A. R. Cabral...Adrien-Pouliot, Québec, QC G1K 7P4, Canada Palladian gold mineralization is rare and occurrences of economic...known from Brazil 290 only. During the Brazilian Gold Cycle (1695–1785), much of the gold production |  | Kwitko, R., Cabral, A. R., Lehmann, B., Laflamme, J.H. G., Cabri, L. J., Criddle, A. J., Galbiatti, H. F. (2002) HONGSHIITE, PtCu, FROM ITABIRITE-HOSTED Au Pd Pt MINERALIZATION (JACUTINGA), ITABIRA DISTRICT, MINAS GERAIS, BRAZIL. The Canadian Mineralogist, 40 (2) 711-723 doi:10.2113/gscanmin.40.2.711 | Journal (article/letter/editorial) | | MINERALIZATION (JACUTINGA), ITABIRA DISTRICT, MINAS GERAIS, BRAZIL ROGERIO KWITKO§ Centro de Desenvolvimento...Doce, BR 262/ km 296, 33030-970 Santa Luzia – MG, Brazil ALEXANDRE R. CABRAL§ AND BERND LEHMANN Institut...35900-900 Itabira-MG, Brazil ABSTRACT Hongshiite occurs associated with palladian gold, and more rarely with...mineralization of the Quadrilátero Ferrífero, central Minas Gerais, Brazil. Hongshiite occurs in grains up to about...to features caused by the weathering of primary gold in a lateritic environment. Submicrometer-sized |  | | Journal (article/letter/editorial) | | Magazine, December 2005, Vol. 69(6), pp. 981±994 Pd-bearing oxides and hydrated oxides in mertieite-II crystals...formation of a very fine-grained mixture of Pd-bearing oxides and hydrated oxides. The Pd oxide/hydrated...occasionally intergrown with goethite. The Pd-O-bearing compounds formed after (1) mertieite-II (Sb content...Brazilian gold rush in the late 17 century when gold with unusual blackish crusts (`ouro preto') was mined...mined in Minas Gerais, Brazil, which only much later were identi®ed as oxygen-bearing compounds of Pd |  | | Journal (article/letter/editorial) | | (2004) ON THE ROSETTES OF “NATIVE PALLADIUM” FROM MINAS GERAIS, BRAZIL: EVIDENCE FROM GONGO SOCO ALEXANDRE...Coelho Neto, 32/704, 22231–110 Rio de Janeiro, RJ, Brazil ROGERIO KWITKO-RIBEIRO Centro de Desenvolvimento... MG, Brazil ABSTRACT Minute rosette-like crystals (~1 m) were found on the surface of a gold nugget...iron ore deposit in Minas Gerais, Brazil. The rosettes consist essentially of palladium with some oxygen...pre-existing gold nugget. Keywords: rosettes, oxygen-bearing palladium, gold nugget, Gongo Soco, Minas Gerais |  | Olivo, G. R., Gauthier, M., Williams-Jones, A. E., Levesque, M. (2001) The Au-Pd Mineralization at the Conceicao Iron Mine, ItabiraDistrict, Southern Sao Francisco Craton, Brazil: An Example of aJacutinga-Type Deposit. Economic Geology, 96 (1) 61-74 doi:10.2113/gsecongeo.96.1.61 | Journal (article/letter/editorial) | | Itabira District, Southern São Francisco Craton, Brazil: An Example of a Jacutinga-Type Deposit GEMA RIBEIRO...São Francisco craton, is a rare example of gold and palladium mineralization hosted by jacutinga, an altered...during the main hydrothermal event, are palladian gold (up to 3.2 wt % Pd) and an unknown Pd-Sb-As mineral...of palladian gold (up to 0.9 wt % Pd) were found mantling hematite II grains. Native gold is commonly...characteristics favor an epigenetic model for gold and palladium concentration in the iron-formation. Since |  | | Journal (article/letter/editorial) | | Iron-Formations of the Quadrilátero Ferrífero, Minas Gerais, Brazil C. KLEIN† Department of Earth and Planetary...Universidade Federal de Minas Gerais, Belo Horizonte, CEP 31270-901, Brazil Abstract This study presents...different iron-formations in the Early Proterozoic Minas Supergroup of the Quadrilátero Ferrífero. These...Quadrilátero Ferrífero has been recognized as a major gold- and iron-rich province, which has resulted in it...it being the best-studied Precambrian region in Brazil. The banded iron-formations, locally known as itabirites |  | Oliveira, Lucilia Aparecida Ramos de, Rios, Francisco Javier, Rosière, Carlos Alberto, Wälle, Markus, Ortelli, Melissa, Kouzmanov, Kalin (2017) Nature and evolution of fluids associated with specularite-bearing Fe and Au-PGE (Jacutinga) mineralization during the Brasiliano orogeny in the eastern São Francisco Craton, Minas Gerais, Brazil. Ore Geology Reviews, 86. 130-153 doi:10.1016/j.oregeorev.2017.02.017 | Journal (article/letter/editorial) | | evolution of fluids associated with specularite-bearing Fe and Au-PGE (Jacutinga) mineralization during...orogeny in the eastern São Francisco Craton, Minas Gerais, Brazil Lucilia Aparecida Ramos de Oliveira a,⇑...Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais 31270-901, Brazil Centro de Desenvolvimento...Tecnologia Nuclear, CDTN, 31270-901 Belo Horizonte, MG, Brazil c Institute of Geochemistry and Petrology (IGP)...affected Paleoproterozoic banded iron formation-bearing sequences along the eastern border of the São Francisco |  | Vial, D.S., Abreu, G.C., Schubert, G., Ribeiro-Rodrigues, L.C. (2007) Smaller gold deposits in the Archean Rio das Velhas greenstone belt, Quadrilátero Ferrífero, Brazil. Ore Geology Reviews, 32 (3) 651-673 doi:10.1016/j.oregeorev.2005.01.004 | Journal (article/letter/editorial) | | Smaller gold deposits in the Archean Rio das Velhas greenstone belt, Quadrilátero Ferrífero, Brazil D.S....Vale do Rio Doce, BR 381, km 450, Santa Luzia, MG, Brazil Instituto de Geociências da Universidade de São...São Paulo, Rua Major Solbiat, 226, Torrinha, SP, Brazil Fundação Educacional de Caratinga, Fazenda Experimental...BR-116, Km 526, Bairro das Graças, Caratinga, MG, Brazil b c Received 26 June 2003; accepted 2 January...Ferrífero is a classic gold province on a global scale, with hundreds of individual gold occurrences in the |  | | Report (issue) | | "Whatever is gold does not glitter. A gentle radiance belongs to the Friedrich Nietzsche, The Wanderer...photo Left: A wall of gold bricks in the Federal Reserve Bank of New York's gold vault Photo Robert Gambee...Crystallized gold from Canada Private collection; Jeff Scovil photo extraLapis English No. 5 Gold The Noble...edition in the English language of extraLapis No. 2 Gold with permission of Christian Weise Verlag, Munich...Weise Verlag, Munich, Germany ISBN 3-921656-23-0 GOLD The Noble Mineral Written By Hans-Gert Bachmann |  | | Report (issue) | | activity focussing on the Curich chalcopyrite PGE-bearing veins and disseminated ores of the NKT Massif,...Skaergaard Intrusion. Johan describes several PGE-bearing deposits and discusses the petrology, mineralogy...PGE is similar to that known to occur commonly for gold, but perhaps not quite as extreme as the PGMs usually...the PGE, whereas, native gold particles would be almost entirely gold or gold-silver alloys. The required...finish. A variation on the lead fire assay using gold as a collector is required to determine Rh quantitatively |  | | Book | | 17. Discovery and Geology of the Lac Des Iles Palladium Deposits M.J. Lavigne, M.J. Michaud, J. Rickard...Montana: the role of soil and silt platinum and palladium geochemical surveys M.L. Zientek, S.R. Corson...Studies in Chloride-bearing Systems at low T 42 Experimental Studies in Bisulfide-bearing Systems at Low T...Geochemistry PGM and PGE-Carriers (1) Relict PGM, and gold (2) (Pt,Pd)-oxides and/or Hydroxides (3) Secondary...Formation of the Ural-Alaska type complexes PGE-BEARING PLACERS CONNECTED WITH URAL-ALASKA TYPE COMPLEXES |
|
