 | | Journal (article/letter/editorial) | | PYROCHLORE-GROUP MINERALS FROM THE LUESHE AND ARAXÁ (BARREIRO) CARBONATITES BY 57Fe MÖSSBAUER SPECTROSCOPY...Lueshe in the Democratic Republic of Congo, and Araxá in Brazil. In contrast to the common assumption that...O2– and 1 OH–, whereas in bariopyrochlore from Araxá, the unusually large value of the quadrupole splitting...Republic of Congo, and the Barreiro carbonatitic complex at Araxá, in Brazil, using 57Fe Mössbauer spectroscopy...bariopyrochlore with BaO up to 19% (Mariano et al. 1997) from Araxá was used for the present investigation. All samples |  | Gomide, Caroline Siqueira, Brod, José Affonso, Junqueira-Brod, Tereza Cristina, Buhn, Bernhard Manfred, Santos, Roberto Ventura, Barbosa, Elisa Soares Rocha, Cordeiro, Pedro Filipe Oliveira, Palmieri, Matheus, Grasso, Carla Bertuccelli, Torres, Murilo Gomes (2013) Sulfur isotopes from Brazilian alkaline carbonatite complexes. Chemical Geology, 341. 38-49 doi:10.1016/j.chemgeo.2013.01.006 | Journal (article/letter/editorial) | | de Brasília (UnB), CEP 70910-900, Brasília, DF, Brazil Instituto de Estudos Sócio-Ambientais, Universidade... Caixa Postal 131, CEP 74001-970, Goiânia, GO, Brazil Laboratório Multiusuário de Microscopia de Alta... Caixa Postal 131, CEP 74001-970, Goiânia, GO, Brazil d Anglo American, Mineração Catalão Ltda, Rodovia...s/n - Fazenda Chapadão, Zona Rural, Ouvidor, GO, Brazil e Vale Fertilizantes, Fazenda Chapadão, s/n - Zona...Zona Rural, CEP 75701-970, Catalão, GO, Brazil f Universidade Católica de Brasília, QS 07 lote 01 EPCT |  | | Report (issue) | | Horizonte, Ibirite, and Macacos Quadrangles Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-D...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the International Cooperation...Quadrangles Minas Gerais, Brazil By JOEL B. POMERENE GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-D Prepared in cooperation with the Departamento...Departamento Nacional da Producao Mineral of Brazil under the auspices of the International Cooperation Administration |  | | Report (issue) | | REPORT Brazil Investigations (IR)BR-76 NIOBIUM (COLUMBIUM) AND TANTALUM RESOURCES OF BRAZIL U. S. Geological... NIOBIUM (COLUMBIUM) AND TANTALUM RESOURCES OF BRAZIL By Max G. White U.S. Geological Survey CONTENTS...deposits ............................... 10 The Barreiro (Araxa) deposit ..................... 10 The...Distribution of alkalic intrusives in Southern Brazil .. 16 Alkalic intrusions in the western side of...geologic setting of deposits .............. 24 Minas Gerais ...................................... 24 Bahia |  | | 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 |  | Gomes, Celso de Barros, Comin-Chiaramonti, Piero, Azzone, Rogério Guitarrari, Ruberti, Excelso, Rojas, Gaston Eduardo Enrich (2018) Cretaceous carbonatites of the southeastern Brazilian Platform: a review. Brazilian Journal of Geology, 48 (2) 317-345 doi:10.1590/2317-4889201820170123 | Journal (article/letter/editorial) | | Universidade de São Paulo – USP, São Paulo (SP), Brazil. E-mails: cgomes@usp.br, rgazzone@usp.br, exrubert@usp...carbonatite occurrences of different regions of Brazil, Paraguay and Bolivia. Locality Occurrence Petrography...Petrography Mineralogy Age References BRAZIL Ribeira Valley 1 Barra do Itapirapuã Dike, vein, breccia..., Flo, Op (Hm, Il), Ch n.d. 75, 76 15 Araxá (Barreiro) Stock, dike Mg-ca, Ca-ca, Fe-ca Gl, Py,...Toniolo et al. (2013); 76, Monteiro et al. (2016); Araxá: 77, Issa Filho et al. (1984); 78, Traversa et al |  | | Journal (article/letter/editorial) | | Tourmaline-Bearing Gold Deposit' Passagemde Mariana (Brazil) ROlAnD FnE•SCI•I• A•D P• Abstract A facies...the "Quadril/ttero Ferrlfero," State of Minas Gerais, Brazil. Exploited sincethe end of the seventeenth...Rocksin the Quadrilfitero Ferrlfero(MinasGerais,Brazil) Accordingto Dorr (1969)and SlightlyModifiedby...J. V. N. et al. (1969) Fm Lithology Itacolomi Minas Orthoquartzite, protoquartzite, conglomerate, grit...phyllite, phyllitic quartzite Piracicaba Sabara Barreiro TaboSes F{cho do Funil Cercadinho •Itabira Gandarela |  | Cordeiro, Pedro F.O., Brod, José A., Dantas, Elton L., Barbosa, Elisa S.R. (2010) Mineral chemistry, isotope geochemistry and petrogenesis of niobium-rich rocks from the Catalão I carbonatite-phoscorite complex, Central Brazil. Lithos, 118 (3) 223-237 doi:10.1016/j.lithos.2010.04.007 | Journal (article/letter/editorial) | | Catalão I carbonatite-phoscorite complex, Central Brazil Pedro F.O. Cordeiro a,⁎, José A. Brod a,b, Elton...Geociências, Universidade De Brasília, Brasília-DF, Brazil Instituto De Estudos Socio-Ambientais, Universidade...Universidade Federal De Goiás, Goiânia-GO, Brazil a r t i c l e i n f o Article history: Received 28 July...Igneous Province (APIP), central Brazil, particularly in the Catalão I and Araxá carbonatite-bearing complexes...available by Mineração Catalão (Anglo American Brazil) from the Catalão I niobium deposit provide an |  | | Report (issue) | | Deposits of the Western Serra do Curral, Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-G...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International...Curral, Minas Gerais, Brazil By GEORGE C. SIMMONS GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-G Prepared in cooperation with the Departamento...Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International Development |  | | Report (issue) | | and Ore Deposits of the Alegria District, Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-J...the Departamento National da Producao Mineral of Brazil under the auspices of the Agency for International...District, Minas Gerais, Brazil By CHARLES H. MAXWELL GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-J Prepared in cooperation with the Departamento...Departamento National da Producao Mineral of Brazil under the auspices of the Agency for International Development |  | | Report (issue) | | Resources of the Pico de Itabirito District Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL Prepared...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International...District Minas Gerais, Brazil By ROBERTS M. WALLACE GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-F Prepared in cooperation with the Departamento...Departamento Nacional da Producao Mineral of Brazil under the au-spices of the Agency for International Development |  | | Report (issue) | | Development of the Quadrilatero Ferrifero Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 641-A...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International...Development of the Quadrilatero Ferrifero Minas Gerais, Brazil By JOHN VAN N. DORR 2d REGIONAL GEOLOGY...GEOLOGY OF THE QUADRILATERO FERRIFERO, MINAS GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 641-A...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International |  | | Journal (article/letter/editorial) | | RuaMaranh8o1484, CEP30150,BeloHorizonte,MinasGerais,Brazil Abstract A definitiveinterpretationof the genesisof...depositionalenvironmentof the MinasSupergroupin Brazil, with the resultsthat the sameenvironmentcouldexplainthe...occurrenceof the MinasSupergroupin the Stateof Minas Gerais,usuallyknownasQuadril•ttero Ferrffero(Fig. 1)...the project,oneof the mostimportant contributions Brazil has received from the earth sciencesector.For...geologyand with the rapid development of this science in Brazil. The event is remem- beredbecauseoneof its mainproductswasthe |  | | Journal (article/letter/editorial) | | mineralisation, Carajás Province, Pará State, Brazil L. M. Lobato1, R. C. Figueiredo e Silva1, C. A...Universidade Federal de Minas Gerais (CPMTCUFMG), Belo Horizonte MG 31270-901, Brazil. 2 Companhia de Pesquisas...Recursos Minerais (CPRM), Brazil. 3 Roots Rock Ltda, Belo Horizonte, Brazil. 4 Instituto de Geociências...Geociências, Universidade de Brası́lia (UnB), Brazil. 5 Centro de Desenvolvimento da Tecnologia Nuclear, Comissão...(CDTNCNEN), Brazil. 6 Departamento de Geologia, Universidade Federal do Rio de Janeiro (UFRJ), Brazil. 7 Companhia |  | | Journal (article/letter/editorial) | | 2015 (Mt) Reserves (Mt) Igneous phosphorites Brazil Russia South Africa 6.04 11.00 2.16 6.70 12.50...rock production. Igneous phosphate deposits in Brazil, most associated with Cretaceous alkaline carbonatite...500 Mt), followed by Russia (1,300 Mt), and then Brazil (315 Mt; Table 1). Apatite The apatite supergroup...Maymeicha-Kotui provinces), with single examples in Brazil (Catalão) and the Republic of South Africa (Phalaborwa;...phosphatic ores is from mines in Russia, Finland, Brazil, and the Republic of South Africa (App. 1). Sedimentary |  | | Report (issue) | | Igneous Rocks of the Quadrilatero Ferrifero, Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 641-B...the Departmento Nacional da Producao Mineral of Brazil under the auspices oj the Agency for International...Ferrifero, Minas Gerais, Brazil By NORMAN HERZ REGIONAL GEOLOGY OF THE QUADRILATERO FERRlFERO, MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 641-B Prepared in cooperation with the Departmento...Departmento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International Development |  | | Report (issue) | | the Departmento National da Produ^ao Mineral of Brazil under the auspices of the Agency for International...Ferrifero, Minas Gerais, Brazil By NORMAN HERZ REGIONAL GEOLOGY OF THE QUADRILATERO FERRIFERO, MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL Prepared in cooperation with the Departmento Nacional da Produqao...Produqao Mineral of Brazil under the auspices of the Agency for International Development of the United...Ferrifero, Minas Gerais, Brazil. (Regional geology of the Quadrilatero Ferrifero, Minas Gerais, Brazil) (Geological |  | | Report (issue) | | waters. The scarcity of sulfide minerals, including pyrite, minimizes or eliminates concerns about acid-mine...led by, in decreasing order of reserves, China, Brazil, Australia, and India (Gambogi, 2015). Australia...Western Australia, Australia, and Araxá in the State of Minas Gerais, Brazil). The principal REE minerals...20° 10° 0° 10° 20° 30° 40° 50° 60° 80° Araxá Buena Norte mining district Zandkopsdrift Lofdal...the Araxá deposit, which overlies the Barreiro carbonatite complex in the State of Minas Gerais, Brazil; |  | de Abreu Cunha, Ioná, Misi, Aroldo, Babinski, Marly, Iyer, Sundaram Sankara S. (2007) Lead isotope constraints on the genesis of Pb–Zn deposits in the Neoproterozoic Vazante Group, Minas Gerais, Brazil. Gondwana Research, 11 (3) 382-395 doi:10.1016/j.gr.2006.02.008 | Journal (article/letter/editorial) | | deposits in the Neoproterozoic Vazante Group, Minas Gerais, Brazil Ioná de Abreu Cunha a , Aroldo Misi a,⁎...Universidade Federal da Bahia, Salvador, BA 40210-340, Brazil Centro de Pesquisas Geocronológicas, Instituto...Rua do Lago, 562, São Paulo, CEP 05508-080, SP, Brazil c Department of Physics and Astronomy, University...the western border of the São Francisco Craton, Brazil, hosts the largest Zn–Pb district in South America...deposits; Vazante Group; Neoproterozoic metallogeny; Brazil 1. Introduction The Neoproterozoic Vazante Group |  | | Report (issue) | | chart showing niobium resources and reserves in Brazil, Canada, and the United States...................lithium-cesium-tantalum (LCT)type pegmatites). Brazil and Canada are the leading nations that produce...produce niobium mineral concentrates, but Brazil is by far the leading producer, accounting for about 90 percent...from weathered material derived from carbonatites. Brazil and Canada also have the largest identified niobium...Malawi, Russia, and South Africa. Australia and Brazil have been the leading producers of tantalum mineral |  | Maheshwari, Anil, Sial, Alcides N., Gaucher, Claudio, Bossi, Jorge, Bekker, Andrey, Ferreira, Valderez P., Romano, Antonio W. (2010) Global nature of the Paleoproterozoic Lomagundi carbon isotope excursion: A review of occurrences in Brazil, India, and Uruguay. Precambrian Research, 182 (4) 274-299 doi:10.1016/j.precamres.2010.06.017 | Journal (article/letter/editorial) | | carbon isotope excursion: A review of occurrences in Brazil, India, and Uruguay Anil Maheshwari a,∗ , Alcides...Department of Geology, UFPE, Recife, PE 50740-530, Brazil Departamento de Geología, Facultad de Ciencias...Geosciences, UFMG, Belo Horizonte, MG 30430-120, Brazil b c a r t i c l e i n f o Article history: Received... Keywords: Lomagundi excursion Carbon isotopes Brazil Uruguay India a b s t r a c t Positive carbon...Aravalli Supergroup (northwestern India), the Minas Supergroup (Brazil), and new sections of the Paso Severino |  | | Journal (article/letter/editorial) | | THE DIAMOND-B[SARING MINAS REGION OF NORTHERN GERAES, BRAZIL. LUCIANO J. MORAES AND DJALMA GUIMAR_•ES...diamond-bearing regionin the northernpart of the Stateof Minas Geraesstretchesfrom the head-watersof the Jequitinhonha...northeasternflanks of Serra do Cabral, such as Burity Grande,Barreiro, Jequitahy,and othersoccurin the valleyof the...situatedthe principal mineral depositsof economicvalue to Brazil, such as iron, man- ganese,gold, and diamonds...meters. 502 DIAMOND-BEARING REGION 44ø OF BRAZIL. 5o3 43" MAP OF THE DIAMONDRE510NOF NORTHERN |  | | Journal (article/letter/editorial) | | ORIGIN OF THE ORES OF MINAS JOHN HIGH-GRADE GERAIS, VAN No. 1 BRAZIL HEMATITE • N. DORR, II...ABSTRACT The high-gradehematite depositsof Minas Gerais, Brazil, are those averagingmore than 66% Fe and...area of some7,000 squarekilometersin central Minas Gerais. Beginningin 1946, a group of Brazilian and...resourcesof this area; HIGH-GRADE HEMATITE ORES OF BRAZIL 3 theyhaveprepared topographic andgeologic mapsona...SETTING The Rocks.bThe high-gradehematiteoresof Minas Geraisoccurin metasedimentaryrocks of unknownbut |  | Mendes, Julio Cezar, Ávila, Ciro Alexandre, Pereira, Ronaldo Mello, Heilbron, Mônica P.L., Moura, Candido A.V. (2006) 207Pb/206Pb-ages of zircons from syn-collisional I-type porphyritic granites of the central Ribeira belt, SE Brazil. Gondwana Research, 9 (3) 326-336 doi:10.1016/j.gr.2005.11.004 | Journal (article/letter/editorial) | | porphyritic granites of the central Ribeira belt, SE Brazil Julio Cezar Mendes a,*,1, Ciro Alexandre Ávila...central segment of the Ribeira belt, southeast Brazil, several foliated porphyritic granitic bodies intrude...more than 1000 km along the southeastern coast of Brazil (Fig. 1). It developed as the result of the amalgamation...de Mauá and Santa Rita de Jacutinga, in the Minas Gerais/Rio de Janeiro/São Paulo state boundaries,...(2006) 326 – 336 327 Fig. 1. Tectonic map of Brazil modified after Schobbenhaus et al. (1984). Legend: |  | | Report (issue) | | jasperoid), sulfide minerals (galena, marcasite, pyrite, and sphalerite), clay minerals, carbonates (calcite...(hematite, limonite, or magnetite), quartz, and pyrite or other sulfide minerals. Beneficiation can be...Zhayrem (Gauert, 2001). 80° Neuquen-Mendoza Araxá Camamu 0° Jameson Land basin Jbel Irhoud 45°...carbonates (calcite, siderite), fluorite, quartz, and pyrite or other sulfide minerals. The deposits tend to...recovered. The Araxá deposit, which lies within the alkalineultramafic Barreiro complex in Minas Gerais, Brazil |
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