 | | Report (issue) | | Mineral Resources of the Monlevade and Rio Piracicaba Quadrangles, Minas Gerais Brazil GEOLOGICAL SURVEY PROFESSIONAL...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International...Mineral Resources of the Monlevade and Rio Piracicaba Quadrangles, Minas Gerais Brazil By ROBERT G. REEVES...GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International |  | | Journal (article/letter/editorial) | | high-strain domain of the Quadrilátero Ferrı́fero, Brazil, hard and soft high-grade hematite ore may occur...are almost entirely constituted of oriented specularite platelets that develop both as a product of crystal–plastic...ores. The analyses of fluid inclusions from specularite crystals of the Conceição and Timbopeba deposits...thrusting the Paleoproterozoic platform sequence of the Minas Supergroup over Mesoproterozoic quartzites of the...synclines, with Paleoproterozoic metasediments of the Minas Supergroup separated by antiformal structures and |  | | Other Paper | | Island; Elba, Italy; Goldfield, Nevada; and Minas Gerais, Brazil. The color has long been believed to be...ratios (6.9 to 7.1) were observed with the Pico Mine sample (GRR 2377). The primary exception was sample...also found. The crystals on the surface of the Pico Mine sample (GRR2377) displayed the oriented crystals...a green colored region of hematite from the Pico Mine (GRR 2377). Anion exchange tests The appearances...------- GRR 1462 Mina do Andrade, João Monlevade, Minas Gerais, Brazil brilliant, variably colored |  | | Journal (article/letter/editorial) | | STUDIES: THE EXAMPLE OF THE CONCEIÇÃO MINE, QUADRILÁTERO FERRÍFERO, BRAZIL CARLOS ALBERTO ROSIÈRE† Instituto... Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte MG, Brazil AND FRANCISCO JAVIER RIOS...(CDTN-CNEN), Cx. Postal 941, 30123-970 Belo Horizonte MG, Brazil Abstract Petrographic and textural analysis combined...northeastern part of the Quadrilátero Ferrífero, Brazil, indicate a complex process of oxidation and mineralization...thereafter platy hematite crystals (hematite III and specularite) forming schistose orebodies. Quartz veins that |  | | 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 |  | | Journal (article/letter/editorial) | | Relations in Iron Ores from the Iron Quadrangle, Brazil: The Correlation of Oxygen Isotope Variations with...hematite-rich ore bodies in the Iron Quadrangle, Brazil. The area studied can be divided into two different...peak metamorphic conditions of the Proterozoic Minas metamorphism 2,000 m.y. ago. Iron ores which have...quartz iron formations - known as itabirites in Brazil - appears to have been a dominant process in the...such as those found in the Iron Quadrangle, Minas Gerais, Brazil. While these ores comprise only a few per |  | 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) | | (jacutinga), Caue“ iron-ore mine, Quadrila¤tero Ferr|¤ fero, Minas Gerais, Brazil A. R. CABRAL1,*, B. LEHMANN1...Luzia-MG, Brazil 3 Diretoria de Metais Nobres, Companhia Vale do Rio Doce, 35900-900 Itabira-MG, Brazil ABSTR...palladian gold occur as euhedral inclusions in specularite and as infill of microfractures and interstices...jacutinga, Cauê iron-ore mine, Itabira Iron Formation, Quadrilátero Ferrı́fero, Brazil. Introduction PALLADSEITE...iron formation (itabirite) at the Cauê iron-ore mine, Itabira (Olivo and Gauthier, 1995; Olivo et al |  | Mendes, Mônica, Lobato, Lydia M., Kunzmann, Marcus, Halverson, Galen P., Rosière, Carlos A. (2017) Iron isotope and REE+Y composition of the Cauê banded iron formation and related iron ores of the Quadrilátero Ferrífero, Brazil. Mineralium Deposita, 52 (2) 159-180 doi:10.1007/s00126-016-0649-9 | Journal (article/letter/editorial) | | related iron ores of the Quadrilátero Ferrífero, Brazil Mônica Mendes 1,2 & Lydia M. Lobato 1 & Marcus...Springer-Verlag Berlin Heidelberg 2016 Abstract The Minas Supergroup banded iron formations (BIFs) of the...indicate hydrothermal iron contribution to the Minas basin. Iron isotope data and Ce anomalies suggest...Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil 2 Present address:...Desenvolvimento Mineral, Vale S.A., Santa Luzia, Minas Gerais 33.040-900, Brazil 3 Department of Earth and Planetary |  | | 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...Avenue de Ligação, 3580, Nova Lima, 34000-000 MG, Brazil; A. C. Araujo (armando@demin.ufmg.br) is now with...Espírito Santo, 35, Belo Horizonte, 30160-039 MG, Brazil. Based on a contribution to the conference on Iron...in Brazil are the so called Iron Ore Quadrangle located in the southeastern state of Minas Gerais and |  | | 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 |  | | Journal (article/letter/editorial) | | carbonatefaciesis found in a eugeosynclinalsuite in Minas Gerais, Brazil, and is of the Algoma type. The depositsrange...surficial rock known as canga, depositsof Minas Gerais,Brazil, the presenceof which is very resistantto...Althoughsuchrocks are known in the paragneisses of Brazil, no good term has been developedto describethem...factoryterm #neissicitabiritein their fieldwork in Brazil. The nomenclature of iron-formation at the highergradesof...must be considered to beunsatisfactory. Brazil Minas Gerais Perhapsthe mostwidelyknowniron-formations |  | | Journal (article/letter/editorial) | | ore of which the peak of Itabira do Campo, Minas Gerais, Brazil, is composed.Derby (7, p. 817) later usedthe...The hard oresof the well known districtsin Minas Gerais,Brazil, present an interestingexample of confusion...consideredthat the hard ores of Casa de Pedra, in Minas Gerais, were formed by heated waters, possiblyof meteoric...powderore may changeto hard ore. In many placesin Brazil hard ore changesin depth to jacutinga,and why a...not been describedby any of the many observersin Brazil, and the ore bodies appear to be at least as thick |  | Spier, Carlos Alberto, de Oliveira, Sonia Maria Barros, Rosière, Carlos Alberto, Ardisson, José Domingos (2008) Mineralogy and trace-element geochemistry of the high-grade iron ores of the Águas Claras Mine and comparison with the Capão Xavier and Tamanduá iron ore deposits, Quadrilátero Ferrífero, Brazil. Mineralium Deposita, 43 (2) 229-254 doi:10.1007/s00126-007-0157-z | Journal (article/letter/editorial) | | of the high-grade iron ores of the Águas Claras Mine and comparison with the Capão Xavier and Tamanduá...Tamanduá iron ore deposits, Quadrilátero Ferrífero, Brazil Carlos Alberto Spier & Sonia Maria Barros de Oliveira...Quadrilátero Ferrífero (QF), southeastern region of Brazil, where metamorphosed and heterogeneously deformed... Unlike other mines in the QF, the Águas Claras Mine contained mainly high-grade ores hosted within dolomitic...distinct types of high-grade ore occurred at the mine: soft and hard. The soft ore was the Editorial |  | | Journal (volume) | | Deposits in the Carajás Mineral Province, Pará State, Brazil Rosaline Figueiredo e Silva, Lydia Maria Lobato...Franciscus Jacobus Baars, Roberta Morais, and Ivan Andrade 255 Chapter 11: Geology and Genesis of the Major...educated Dutch geologist and permanent resident of Brazil with an M.Sc. degree in metamorphic geology, under...in the Espinhaço Range and has worked widely in Brazil and shield South America, mainly on exploration...geologic, mineral resources, and geotectonic map of Brazil, published in 4 sheets and in DVDGIS format with |  | | Report (issue) | | and Ore Deposits of the Itabira District Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL Prepared...and Ore Deposits of the Itabira District Minas Gerais, Brazil By JOHN VAN N. DORR 20 and ALUIZIO LICINIO...GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-C...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the International Cooperation..._____ Thickness and contacts..________________ Minas series ________________________________ Cara§a group |  | 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... Universidade Federal de Ouro Preto, Escola de Minas, Departamento de Geologia, Campus Morro do Cruzeiro...(eastern border of the São Francisco craton, SE Brazil). We sampled hydrothermal minerals (monazite, rutile |  | | Report (issue) | | Mineral Resources of the Congonhas District Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL PAPER 290...the Departamento N acional da Produfao Mineral of Brazil under the auspices of the International Cooperation...Mineral Resources of the Congonhas District Minas Gerais, Brazil By PHILIP W. GUILD GEOLOGICAL SURVEY ...Departamento N acional da Produ~ao M,ineral of Brazil under the auspices of the International Cooperation...__________________ _ Iron region of central Minas Gerais _______________ _ Congonhas district_ ________________________ |  | 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 (issue) | | found by the late Dr. J o h n Williamson at his mine at M w a d u i in Tanganyika and weighed 54 ct in...diamonds in the brooch came from the Williamson mine. There is a two-prong spring fastening and the stem...4-64 ct. „ 12-40 ct. 311 EUCLASE FROM MINAS GERAIS, BRAZIL By FRANCISCO MULLER U BASTOS, F.G.A....L a short time ago, the existence of euclase in Brazil was restricted to the well-known mineralogical...mineralogical area of O u r o Pre to in the state of Minas Gérais. Today, however, the attention of m a n y Brazilians |  | | Book | | BARTORELLI ::• . . .. 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 |  | Santos, M.S., Cruz, Simone C.P., Lobato, L.M., Mandetta, P., Burgos, C.M. (2022) Structural and hydrothermal evolution of the shear-zone-related iron-oxide enrichment in metavolcano-sedimentary rocks of the intracontinental araçuaí orogen: The case of the espírito santo iron deposit. Ore Geology Reviews, 140. 103719pp. doi:10.1016/j.oregeorev.2020.103719 | Journal (article/letter/editorial) | | Ondina, Salvador - Bahia/Brazil. 2. Universidade Federal de Minas Gerais, Centro de Pesquisas Prof.... Instituto de Geociências, Belo Horizonte, MG, Brazil. 3. Fundo de investimentos Biogold Inc. Rua Paul...Bouthilier, n 37, Mangabeiras, Belo Horizonte Minas Gerais/Brazil. 4. Companhia de Pesquisa de Recursos Minerais...2862 Sussuarana, Salvador - Bahia/Brazil. ABSTRACT The Rio São João metavolcano-sedimentary sequence is...in the region near IgaporãCaetité, Bahia state, Brazil. The Espírito Santo iron deposit has compact hematite |  | | Journal (issue) | | extraordinary George Frederick Kunz ...... p. 12 Black Rock Mine, South Africa EFMLS: Annual business meeting ....2019 2 Botryoidal hematite from the Red Mountain Mine, Augusta County, VA. Photo: Bob Cooke. Hematite...story. Iridescent hematite occurs naturally in Brazil (and therefore probably elsewhere in the world)...ore extracted at the Carajás Mine in Brazil, the world’s largest iron mine, with deforestation as a significant...above the unweathered hematite is the easiest ore to mine. The site is so large that it can readily be identified |  | | Journal (article/letter/editorial) | | the Pau Branco Deposit, Quadrilátero Ferrífero, Brazil— Implications for Fluid-Rock Interaction During...70910-900, Brazil de Geociências, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901...31270-901, Brazil for Exploration Targeting, School of Earth Sciences, University of Western Australia,...Branco iron ore deposit, Quadrilátero Ferrífero, Brazil. The phyllite and iron ore of Pau Branco extend...part of the Quadrilátero Ferrífero. The open-pit mine started in 1981 and has an annual production of |  | | Conference Proceedings (Volume) | | Cover photograph: View of the Aitik open pit copper mine in the very north of Sweden. Mining operations started.............................................. 514 João RS Carvalho, Ana S Fernandes, Bruno B Moreira, Álvaro..... 522 Ana S.C.Fernandes, Jorge M.R.S. Relvas & João X. Matos The Jörn granitoid complex, Skellefte...Ahola Occurrence of gold (electrum) in the Lousal mine, Iberian pyrite belt, Portugal ..................Oliveira, Carlos J. P. Rosa, Fernanda M. G. Guimarães, João X. Matos, Zélia Pereira, Vasco C. S. Frias, Diogo |  | | Book | | iron ore production, followed by Australia and Brazil with their combined production of 919 Mt in 2012...2013 being about 820 Mt/a, largely from Australia, Brazil, South Africa, Canada, and India. The three largest...largest iron ore producers in the world are Vale in Brazil and Rio Tinto and BHP Billiton with operations...3000 2500 World iron ore production Australia Brazil China (estimated) 2000 1500 1000 500 0 1990 1995...ore and iron content, followed very closely by Brazil with slightly higher in situ iron grades. Russia |
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