 | Cabral, Alexandre Raphael, Koglin, Nikola, Strauss, Harald, Brätz, Helene, Kwitko-Ribeiro, Rogerio (2013) Regional sulfate–hematite–sulfide zoning in the auriferous Mariana anticline, Quadrilátero Ferrífero of Minas Gerais, Brazil. Mineralium Deposita, 48 (7) 805-816 doi:10.1007/s00126-013-0481-4 | Journal (article/letter/editorial) | | Mariana anticline, Quadrilátero Ferrífero of Minas Gerais, Brazil Alexandre Raphael Cabral & Nikola Koglin...south-eastern part of the Quadrilátero Ferrífero of Minas Gerais, Brazil. Cross-cut relationships of barite veins...Reconnaissance S-isotopic data from barite and pyrite (Antônio Pereira barite deposit and its adjacent gold deposit...fluid overprint in the Mariana anticline. The Antônio Pereira barite has Δ33S values that are near zero...that define a positive linear trend with the Antônio Pereira pyrite. The latter has homogenous δ34S values |  | | Journal (article/letter/editorial) | | Polycrystals of Bimperial^ topaz from Minas Gerais state, Brazil Teodoro Gauzzi 1 & Gilberto Álvares da...variety that occurs in the Ouro Preto region (Minas Gerais state, Brazil). Polygonal sectors within the...gemstone variety of topaz from the Ouro Preto region, Minas Gerais state, Brazil (Silva and Ferreira Editorial...Universidade Federal de Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG 35400-000, Brazil 2 Department...Universidade Federal de Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG 35400-000, Brazil 1987). The Bimperial^ |  | Gonçalves, Guilherme O., Lana, Cristiano, Buick, Ian S., Alkmim, Fernando F., Scholz, Ricardo, Queiroga, Glaucia (2019) Twenty million years of post-orogenic fluid production and hydrothermal mineralization across the external Araçuaí orogen and adjacent São Francisco craton, SE Brazil. Lithos, 342. 557-572 doi:10.1016/j.lithos.2019.04.022 | Journal (article/letter/editorial) | | Araçuaí orogen and adjacent São Francisco craton, SE Brazil Guilherme O. Gonçalves, Cristiano Lana, Ian S...Araçuaí orogen and adjacent São Francisco craton, SE Brazil, LITHOS, https://doi.org/ 10.1016/j.lithos.2019...Araçuaí orogen and adjacent São Francisco craton, SE Brazil Guilherme O. Gonçalvesa,* goncalves.go@icloud.com...Research Group, Universidade Federal de Ouro Preto, Escola de Minas, Departamento de Geologia, Campus Morro...Morro do Cruzeiro s/nº, 35400-000 Ouro Preto – MG, Brasil b Department of Earth Sciences, Stellenbosch |  | De Oliveira, Ester Figueiredo, Castañeda, Cristiane, Eeckhout, Sigrid Griet, Gilmar, Messias Menezes, Kwitko, Rogério Ribeiro, De Grave, Eddy, Botelho, Nilson Francisquini (2002) Infrared and Mössbauer study of Brazilian tourmalines from different geological environments. American Mineralogist, 87 (8) 1154-1163 doi:10.2138/am-2002-8-914 | Journal (article/letter/editorial) | | N. CP 941 CEP 30123-970, Belo Horizonte, Minas Gerais, Brazil 2 Instituto de Geociências, Universidade...3173 CEP 30140-970, Brasília, Distrito Federal, Brazil 3 Department of Subatomic and Radiation Physics...Universidade Federal de Ouro Preto, CEP 35400-000 Ouro Preto, Minas Gerais, Brazil 5 Companhia Vale do Rio...P.O. Box 09 CEP 33010-970, Santa Luzia, Minas Gerais, Brazil ABSTRACT Infrared (IR) spectra in the OH...and hydrothermal deposits in the state of Minas Gerais, Brazil. In the magmatic environment, samples of |  | | Journal (article/letter/editorial) | | as small (generally less than 2-mm) crystals on quartz crystals found in small greisen deposits in the...associated with bertrandite, fluorite, muscovite, and quartz. Specific occurrences include the Boomer, Mary...from Brazil in 1785. Dana (1892) gives the locality as the mining district of Villa Rica in Minas Gerais...early name for Ouro Preto (“black gold”), Figure 2. Euclase, 2.4 cm tall, Ouro Preto, Brazil. Luiz Menezes...which was the capital of Minas Gerais from 1720 to 1897. Today, Ouro Preto is a city of 70,000 residents |  | | Journal (article/letter/editorial) | | lode of Passagem, Quadrilátero Ferrífero of Minas Gerais, Brazil Alexandre Raphael Cabral & Nikola Koglin...and coexisting minerals precipitated. In Minas Gerais, Brazil, the occurrence of gold mineralisation in...mineralisation in Minas Gerais is the Passagem de Mariana gold deposit, near Ouro Preto. The genesis of...tourmaline coexists with arsenopyrite in tourmaline-rich quartz veins (Fig. 1). Despite detailed investigation...south-eastern part of the Quadrilátero Ferrífero of Minas Gerais. A location map with geological background can |  | 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) | | Velhas greenstone belt, Quadrilátero Ferrífero, Brazil D.S. Vial a,⁎, G.C. Abreu b , G. Schubert a , L...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...Grande), (3), Quartz veins (e.g., Juca Vieira, Fernandes), (4), Disseminated sulfides with quartz veinlets |  | de Souza Martins, Breno, Lobato, Lydia Maria, Rosière, Carlos Alberto, Hagemann, Steffen G., Santos, João Orestes Schneider, Villanova, Fernando Lucas dos Santos Peixoto, Figueiredo e Silva, Rosaline Cristina, de Ávila Lemos, Lucas Henrique (2016) The Archean BIF-hosted Lamego gold deposit, Rio das Velhas greenstone belt, Quadrilátero Ferrífero: Evidence for Cambrian structural modification of an Archean orogenic gold deposit. Ore Geology Reviews, 72. 963-988 doi:10.1016/j.oregeorev.2015.08.025 | Journal (article/letter/editorial) | | de Minas Gerais, Avenida Antônio Carlos, n.° 6627, Bairro Pampulha, Belo Horizonte, Minas Gerais, CEP...CEP 31270-901, Brazil School of Earth and Environment, The University of Western Australia, 35, Stirling...Sítio Mineração S/A, Mina do Lamego, Sabará, Minas Gerais, Brazil a r t i c l e i n f o Article history:...Cuiabá–Lamego trend, Quadrilátero Ferrífero region, Brazil. Both Archean orogenic gold deposits are situated...controlled by pinch and swell, and locally expressed quartz boudins developed during D1–D2. They have two orthogonal |  | | Book | | until he managed to reach the land of his dreams, Brazil. A specialist in the field of geology and mineralogy...France acquired his remarkable collection of giant quartz crystals, exhibited in the National Museum of Natural...crystals and the remarkable mineral treasures of Brazil, as well as the incredible adventures and difficulties...CRYSTALS GIANT QUARTZ CRYSTALS UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL Cyan Magenta...Crystals GIANT QUARTZ CRYSTALS UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL SOFIA–MOSCOW |  | Guimarães, Frederico Sousa, de Freitas, Monica Elizetti, Rios, Francisco Javier, Pedrosa, Tércio Assunção (2019) Mineralogical characterization and origin of uranium mineralization in Witwatersrand-like metaconglomerate of the Moeda Formation, Quadrilátero Ferrífero, Brazil. Ore Geology Reviews, 106. 423-445 doi:10.1016/j.oregeorev.2019.01.016 | Journal (article/letter/editorial) | | of the Moeda Formation, Quadrilátero Ferrífero, Brazil Frederico Sousa Guimarães, Monica Elizetti de Freitas...of the Moeda Formation, Quadrilátero Ferrífero, Brazil, Ore Geology Reviews (2019), doi: https://doi.org/10...of the Moeda Formation, Quadrilátero Ferrífero, Brazil Frederico Sousa Guimarãesa,b (fredsgguimaraes@gmail...Nuclear. Av. Presidente Antônio Carlos, 6627, Universidade Federal de Minas Gerais-UFMG, Campus Pampulha...Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil. b Corresponding author Abstract The Moeda Formation |  | Veloso, Renato Welmer, Mello, Jaime Wilson Vargas de, Abrahão, Walter Antônio Pereira, Glasauer, Susan (2019) Seasonal impacts on arsenic mobility and geochemistry in streams surrounding a gold mineralization area, Paracatu, Brazil. Applied Geochemistry, 109. 104390 doi:10.1016/j.apgeochem.2019.104390 | Journal (article/letter/editorial) | | Paracatu, Brazil T Renato Welmer Velosoa,∗, Jaime Wilson Vargas de Mellob,c, Walter Antônio Pereira Abrahãob...Lindas de Goiás, GO, Brazil Soil Department, Universidade Federal de Viçosa, Brazil c National Institutes...Institutes of Science and Technology, INCT-Acqua, Brazil d University of Guelph, School of Environmental Sciences...traverse a gold mineralization area in Paracatu, Brazil. The results relate As mobility in water draining...materials in the Quadrilatero Ferrifero (QF) in central Brazil (Matschullat and Borba, 2000; Gontijo and Watanabe |  | | Journal (issue) | | Articles 708 Coloured Stone Mining and Trade in Brazil: A Brief History and Current Status By Aurélien...Collection V. L. Villani photo p. 758 Cover Photo: Brazil is the source of a variety of coloured stones,...(Figure 4b), spessartine (Figure 4c), almandine, quartz, zircon, apatite, topaz, sillimanite, fluorite...tourmaline (Figure 4d), aquamarine, spessartine, quartz, topaz, zircon and phenakite are mined. Tourmaline...Junior (BC Gemas do Brasil, Governador Valadares, Brazil), and heating to 500°C in air was successful in |  | | Journal (article/letter/editorial) | | shallow-intrusive textures are composed almost entirely of quartz and of topaz (Johannson, 1932); ii) late-stage...rhyolites ro and granites, and greisen-, pegmatite-, quartz-type veins; and iii) cavities formed by the release...Phenocrysts of topaz, K-feldspar and mica in a quartz-feldspar-topaz groundmass, within ongonite from...biotite (Congdon and Nash, 1991); (D) Phenocrysts of quartz, alkali feldspar, and topaz in the rhyolite dikes...preferred orientation (flow texture), of and two quartz phenocrysts (Haapala, 1997); (F) Topazite dike |
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