 | 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) | | ASSOCIATION OF PALLADIUM-BEARING GOLD, HEMATITE AND GYPSUM IN AN OURO PRETO NUGGET ALEXANDRE RAPHAEL CABRAL§...296, Caixa Postal 09, 33030-970 Santa Luzia â MG, Brazil RICHARD D. JONES 1636 East Skyline Drive, Tucson...â MG, Brazil ABSTRACT An ouro preto (black gold) nugget from Gongo Soco, Minas Gerais, Brazil, has a...mineral assemblage of hematite and gypsum hosted by Pd-bearing gold. The hematite inclusion is microfractured...oxidized (supergene) zones of gold deposits, the hematiteâgypsumbearing palladian gold nugget was tectonically |  | 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 PdâO COMPOUND FROM GONGO SOCO, MINAS GERAIS, BRAZIL ALEXANDRE RAPHAEL CABRAL§ AND BERND LEHMANN...dark encrustation of an ouro preto nugget of Gongo Soco, Minas Gerais, Brazil, is confirmed by elastic... PdâO-bearing compound, ouro preto nugget, Gongo Soco, Minas Gerais, Brazil. SOMMAIRE Lâexistence dâhydrogĂšne...caractĂ©ristique dâune pĂ©pite de ouro preto prĂ©levĂ©e Ă Gongo Soco, Minas Gerais, Brazil, est confirmĂ©e par une...composĂ© contenant PdâO, pĂ©pite de ouro preto, Gongo Soco, Minas Gerais, BrĂ©sil. INTRODUCTION Evidence |  | | Journal (article/letter/editorial) | | palladium and platinum from ouro preto-bearing mineralisation in Brazil Alexandre Raphael Cabral a,b...that triggered two major gold rushes in Brazil (Minas Gerais and Serra Pelada). The auriferous mineralisations...mineralisations of Gongo Soco and Itabira, Minas Gerais, and Serra Pelada, ParĂĄ, have PdâO-bearing, dark-coloured...dark-coloured ferruginous coatings on gold (ouro preto). Depending upon the amount of palladium alloyed with...PdâPtâSe-bearing minerals; Ouro preto; Gongo Soco; Itabira; Serra Pelada; Brazil 1. Introduction Brazil had two major |  | Raphael Cabral, A., Lehmann, B., Kwitko, R., Jones, R. D., Pires, F. R. M., Rocha Filho, O. G., Innocentini, M. D. (2001) Palladium-oxygenated compounds of the Gongo Soco mine, QuadrilĂĄtero FerrĂfero, central Minas Gerais, Brazil. Mineralogical Magazine, 65 (2) 169-179 doi:10.1180/002646101550208 | Journal (article/letter/editorial) | | mine, QuadrilaÌtero FerriÌfero, central Minas Gerais, Brazil A. RAPHAEL CABRAL1,*, B. LEHMANN1, R. KWITKO2...296 Caixa Postal 09, 33030-970 Santa Luzia-MG, Brazil 3 1636 East Skyline Drive, Tucson, AZ 85178, USA...Cidade UniversitaÌria, 21949-900 Rio de Janeiro-RJ, Brazil 5 Mineraça~o Socoimex Ltda., Fazenda Gongo Soco...Soco, Caixa Postal 42, 34800-000 CaeteÌ-MG, Brazil ABSTR ACT New data on the Gongo Soco palladium-oxygenated...as metastable. Their remarkable occurrence in âouro pretoâ (black gold) and jacutinga (auriferous itabirite/iron |  | | Journal (article/letter/editorial) | | 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 BarĂŁo de Cocais-MG, Brazil b d Received 9 September 2005; accepted 6 March...October 2007 Abstract Gold nuggets from specular hematite-rich, sulphide-free, auriferous veins (jacutinga)...deposit in the QuadrilĂĄtero FerrĂfero of Minas Gerais, Brazil, have inclusions of palladium arseno-antimonides...arseno-antimonides (isomertieite and mertieite-II) and hematite. Both isomertieite and mertieite-II are commonly |  | 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 ArchĂ€ometrie...Luzia-MG, Brazil 6 Votorantim Metais, Praça Ramos de Azevedo 206, 01037-010 SĂŁo Paulo-SP, Brazil Abstract...240-km-long, north-trending Au-Pd-Pt belt in Minas Gerais, Brazil, which hosts hydrothermal Pd-Ptâbearing...mineralization, as deduced from abundant detrital hematite and rutile, and the discovery of detrital hongshiite |  | | Journal (article/letter/editorial) | | âKALKOWSKYNâ FROM OURO PRETO, MINAS GERAIS, BRAZIL: A MIXTURE OF PSEUDORUTILE, RUTILE, AND HEMATITE Daniel ATENCIO§...Paulo, Rua do Lago 562, 05508-080, SĂŁo Paulo, SP, Brazil Klaus THALHEIM Senckenberg Naturhistorische Sammlungen...the discredited âkalkowskynâ, from Ouro Preto, Minas Gerais, Brazil, was investigated by EDS and X-ray...and hematite, probably generated by alteration of ilmenite. Intergrowths of rutile and hematite, with...conglomeratic quartzite, which occurs between Ouro Preto and the Pico do Itacolomi, in a deep valley carved |  | | Report (issue) | | FIELD EXCURSION FROM BELO HORIZONTE TO OURO PRETO MINAS GERAIS, BRAZIL REGIONAL STRATIGRAPHY AND TECTONICS...DAS VELHAS GREENSTONE BELT AND THE PROTEROZOIC MINAS SUPERGROUP AS BACKGROUND FOR GOLD METALLOGENESIS...Geoci&ncias Universidade Federal de Minas Gerais Belo Horizonte, Brazil 2U.S. Geological Survey Denver,...prospect pit at Morro do Cruzeiro, Ouro Preto, Minas Gerais, Brazil. 14 INTRODUCTION This paper is...reporting on a workshop held in Belo Horizonte, Brazil, from December 1-10, 1986. The workshop was sponsored |  | Cabral, A. R., Zeh, A., Galbiatti, H. F., Lehmann, B. (2015) LATE CAMBRIAN Au-Pd MINERALIZATION AND Fe ENRICHMENT IN THE ITABIRA DISTRICT, MINAS GERAIS, BRAZIL, AT 496 Ma: CONSTRAINTS FROM U-Pb MONAZITE DATING OF A JACUTINGA LODE. Economic Geology, 110 (1) 263-272 doi:10.2113/econgeo.110.1.263 | Journal (article/letter/editorial) | | AND Fe ENRICHMENT IN THE ITABIRA DISTRICT, MINAS GERAIS, BRAZIL, AT 496 MA: CONSTRAINTS FROM U-Pb MONAZITE...Lima-MG, Brazil Abstract Bonanza-style mineralization of palladiferous gold in specular hematite-rich lodes...century in the province that became known as Minas Gerais. The timing of this itabirite-hosted vein mineralization...events recorded in the QuadrilĂĄtero FerrĂfero of Minas Gerais, the ~2.0 Ga Transamazonian event and the ~0...also affected surrounding Neoarchean rocks of the Minas Supergroup, as well as younger rocks of the southern |  | 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) | | MERCURY-RICH PALLADIFEROUS PLATINUM FROM SERRO, MINAS GERAIS, BRAZIL Alexandre Raphael CABRAL§ and Georges BEAUDOIN...296, Caixa Postal 09, 33030-970 Santa Luzia â MG, Brazil Bernd LEHMANN Institut fĂŒr Mineralogie und Mineralische...Carlos POLĂNIA Rua Paris 105, 34800-000, CaetĂ© â MG, Brazil Marc CHOQUETTE DĂ©partement de gĂ©ologie et de gĂ©nie...palladium from CĂłrrego Bom Sucesso, Serro, Minas Gerais, Brazil, were investigated by scanning electron...PdâPt-bearing deposits associated with gold or hematite (or both) have a distinctive seleniferous signature |  | 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) | | in hematite composition within the Palaeoproterozoic Itabira Iron Formation, Minas Gerais, Brazil A....Companhia Vale do Rio Doce, Itabira MG, 35900-900, Brazil 4 Companhia Vale do Rio Doce, Fazenda Gongo Soco...Soco, BaraÌo de Cocais MG, 35970-000, Brazil 2 ABSTR ACT Hematite is a mineral the chemical composition...the mineral chemistry of hematite in Precambrian iron formations, where hematite forms monomineralic high-grade...high-grade orebodies. Electron microprobe analysis of hematite from two iron-ore deposits, CaueÌ (Itabira district) |  | | Journal (article/letter/editorial) | | DepositsNear Ouro Preto, Minas Gerais, Brazil DoNAn) R. Oâą.SEN Abstract Topazdeposition near Ouro Preto,Minas...Minas Gerais,Brazil, tookplacein the Sabar/âą formation,a Precambrian phylliteof considerable compositional...pegmatiticorigin. R. F. Johnson The precious topazdeposits near Ouro Pretoare and suggested (1962) recognized the difficultyof...Quadril/tteroFerrifero of Minas perfectly planar, concordant pegmatitesin the same Gerais. Miningwasinitiatedpriorto... Location and Geology The topaz depositsnear Ouro Preto are located O. A. Derby visitedthe area in 1901 |  | Galbiatti, H.F., Fonseca, M.A., Pereira, M.C., PolĂŽnia, J.C. (2007) Structural control of AuâPd mineralization (Jacutinga): An example from the CauĂȘ Mine, QuadrilĂĄtero FerrĂfero, Brazil. Ore Geology Reviews, 32 (3) 614-628 doi:10.1016/j.oregeorev.2005.03.020 | Journal (article/letter/editorial) | | example from the CauĂȘ Mine, QuadrilĂĄtero FerrĂfero, Brazil H.F. Galbiatti a,â, M.A. Fonseca b , M.C. Pereira...Rio Doce, Minas de Itabira, Serra do Esmeril S/N, Mina CauĂȘ, 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 QuadrilatĂ©ro FerrĂfero, Minas Gerais. Structural analysis reveals two important features...best mineralization occurs in the contacts of hematite bodies (soft/hard) and intrusive rocks with fractured |  | | Journal (article/letter/editorial) | | now operating in the production of iron ore in Brazil currently employ or are planning to employ some...concentration operations currently employed in Brazil and shows how ore mineralogy plays a fundamental...present only in the form of crystal relicts within hematite grains, it may lead to the selection of either...Avenue de Ligação, 3580, Nova Lima, 34000-000 MG, Brazil; A. C. Araujo (armando@demin.ufmg.br) is now with...EspĂrito Santo, 35, Belo Horizonte, 30160-039 MG, Brazil. Based on a contribution to the conference on Iron |  | Cabral, Alexandre Raphael, TupinambĂĄ, Miguel, Zeh, Armin, Lehmann, Bernd, Wiedenbeck, Michael, Brauns, Michael, Kwitko-Ribeiro, Rogerio (2017) Platiniferous goldâtourmaline aggregates in the goldâpalladium belt of Minas Gerais, Brazil: implications for regional boron metasomatism. Mineralogy and Petrology, 111 (6) 807-819 doi:10.1007/s00710-017-0496-0 | Journal (article/letter/editorial) | | aggregates in the goldâpalladium belt of Minas Gerais, Brazil: implications for regional boron metasomatism...The platiniferous goldâpalladium belt of Minas Gerais, Brazil, forms an approximately 240-km-long, roughly...Xavier 524 s. A4016, Rio Janeiro-RJ 20550-050, Brazil 4 Deutsches GeoForschungsZentrum GFZ, Telegrafenberg...Rodovia BR 381, km 450, Santa Luzia-MG 33040-900, Brazil tourmaline aggregates seem to be the ultimate...Metasomatism . PdPt . Goldâpalladium belt . Minas Gerais . Brazil Introduction Auriferous lode deposits and |  | | Report (chapter) | | built heritage of the interior of Brazil: the use of stone in Minas Gerais A. G. COSTA Department of Geology...University of Minas Gerais, Av. AntoÌnio Carlos 6627, 31270 â 901, Belo Horizonte (Minas Gerais), Brazil (e-mail:...costa@uol.com.br) Abstract: The cultural heritage of Brazil built with natural stone is expressive and shows...interior, especially in the current State of Minas Gerais, a large number of historic buildings can be...steatites and schists in historic buildings in Brazil, which is part of a research project in progress |  | | Report (volume) | | workshop held December 1-10,1986, in Belo Horizonte, Brazil, was hosted by the Institute Brasileiro de Mineragao...Quintas, Mineragao Morro Velho Club, Nova Lima, Brazil December 4,1986 1. 2. 3. 4. 5. Sergio C. Guedes...Quadrilatero Ferrffero, Minas Gerais, Brazil Workshop: Belo Horizonte, Brazil, December 1-10,1986 Sponsors:...Data Gold deposits related to greenstone belts in Brazil Deposit modeling workshop; Part A Excursions /...deposits related to greenstone belts in Brazil, Belo Horizonte, Brazil, 1986, by Charles H. Thorman and Eduardo |  | | Report (issue) | | Cachoeira do Campo Dom Bosco, and Ouro Branco Quadrangles Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the International Cooperation...Cachoeira do Campo Dom Bosco, and Ouro Branco Quadrangles Minas Gerais, Brazil By ROBERT F. JOHNSON GEOLOGY...GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-B...the Departamento National da Producao Mineral of Brazil under the auspices of the International Cooperation |  | | Book | | MINES AND MINERALS IN BRAZIL --= ··--· ··- ·-·=- MINES AND MINERALS IN BRAZIL J OSIAS LEAO (ECONOMIC...regarding water power and industry of electr·icity in Brazil were specially prepared at the Division of Waters........ 189 SUMMARY OF THE MINERAL RESERVES OF BRAZIL..... . ... ....... . .. 199 STATISTICAL TABLES...practically untouched, the mineral reserves of Brazil have already been a source of wealth to many and...without the discovery of the precious metals in Brazil the existence of the modern economic man would |  | | Journal (issue) | | Moore Recent discoveries of hydroxylherderite in Minas Gerais ..............................................R. P. Richards Famous mineral localities: the Ouro Preto topaz mines ...................................Ilha do Fundao 21.910 Rio de Janeiro, Brazil INTRODUCTION Brazil is world famous for its several occurrences...prized by collectors. These occurrences, all in Minas Gerais, are described below along with the specimens...du bassin superieur du Ribeirao Laranjeiras (Minas Gerais). Anais Academia brasileira Ciencias, 54, no |  | | Book | | BARTORELLI ::âą . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais. Collection of Alvaro Lucio. Photograph taken...Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo, Andrea...3. Minerals - Brazil 4. Minerals- Classification 5. Mineralogy 6. Mineralogy - Brazil - History 7. Precious...Precious stones - Brazil I. Bartorelli, Andrea. II. Title. 09-10025 Cover photograph: Crystal of brazilianite |  | Sampaio, G.M.S., Pufahl, P.K., Raye, U., Kyser, K.T., Abreu, A.T., Alkmim, A.R., Nalini, H.A. (2018) Influence of weathering and hydrothermal alteration on the REE and ÎŽ56Fe composition of iron formation, CauĂȘ Formation, Iron Quadrangle, Brazil. Chemical Geology, 497. 27-40 doi:10.1016/j.chemgeo.2018.08.014 | Journal (article/letter/editorial) | | iron formation, CauĂȘ Formation, Iron Quadrangle, Brazil G.M.S. Sampaio, P.K. Pufahl, U. Raye, K.T. Kyser...iron formation, CauĂȘ Formation, Iron Quadrangle, Brazil. Chemge (2018), doi:10.1016/j.chemgeo.2018.08.014...iron formation, CauĂȘ Formation, Iron Quadrangle, Brazil SC RI Sampaio, G.M.S.Âč*, Pufahl, P.K.ÂČ,Raye...Federal University of Ouro Preto â UFOP, CEP 35400-000, Ouro Preto, Minas Gerais, Brazil MA ÂČ Department...Federal University of Ouro Preto â UFOP, 35400-000, Ouro Preto, Minas Gerais, Brazil. E-mail: geraldo.sampaio@ufop |  | Barbosa, Paola F., Lagoeiro, Leonardo, Scholz, Ricardo, Graça, Leonardo M., Mohallem, Nelcy (2015) Magnetite-hematite transformation: correlation between natural and synthetic features. Mineralogy and Petrology, 109 (3) 329-337 doi:10.1007/s00710-014-0340-8 | Journal (article/letter/editorial) | | 1007/s00710-014-0340-8 ORIGINAL PAPER Magnetite-hematite transformation: correlation between natural and...natural reactions of magnetite to hematite and synthetic reactions of hematite to magnetite, were chosen. It...University of Minas Gerais, Av. AntĂŽnio Carlos 6627, Pampulha, Belo Horizonte, MG, Brazil e-mail: paolafeba@yahoo...Federal University of Ouro Preto, Campus Morro do Cruzeiro s/n, Ouro Preto, MG, Brazil N. Mohallem Department...University of Minas Gerais, Av. AntĂŽnio Carlos 6627, Pampulha, Belo Horizonte, MG, Brazil reproduced in |  | 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), CauĂȘ iron-ore mine, QuadrilĂĄtero FerrĂfero, 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...Itabira Iron Formation, QuadrilaÌtero FerrıÌfero, Brazil. Introduction PALLADSEITE, ideally Pd17Se15, is...compounds associated with gold, the so-called ouro preto (black gold) (Johnson and Lampadius, 1837; cf...Itabira Iron Formation is the middle unit of the Minas Supergroup, and consists of an itabirite unit (CaueÌ |  | VarajĂŁo, C. A. C., Suckal, V., Vilela, R. A., de Melo, R. J., Bruand, A., Ramanaidou, E. R., Gilkes, R. J., Lagoeiro, L. E., da Costa, T. A. V. (2003) Bulk density as method of evaluating reducibility of hard hematite ore in direct reduction process. Mineral Processing and Extractive Metallurgy, 112 (1). 52-53 doi:10.1179/037195503225011457 | Journal (article/letter/editorial) | | hard hematite ore in DR process Bulk density as method of evaluating reducibility of hard hematite ore...L. E. Lagoeiro and T. A. V. da Costa Massive hematite ore (MHO) is a special high grade iron ore used...using optical and scanning electron microscopes. Hematite is the main component of the samples and occurs...microplaty crystals that fill cavities between granular hematite. Secondary micropores (Ă
to 5 mm) related to euhedral...de Minas, Universidade Federal de Ouro Preto, Campus Morro do Cruzeiro, 35400 Ouro Preto, Brazil; V. |
|
Ouro Preto, Minas Gerais, Brazil