 | | 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 |  | Andrade, M. B., Yang, H., Atencio, D., Downs, R. T., Chukanov, N. V., Lemée-Cailleau, M. H., Persiano, A. I. C., Goeta, A. E., Ellena, J. (2017) Hydroxycalciomicrolite, Ca1.5Ta2O6(OH), a new member of the microlite group from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. Mineralogical Magazine, 81 (3) 555-564 doi:10.1180/minmag.2016.080.116 | Journal (article/letter/editorial) | | group from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil M. B. ANDRADE1,2,*, H. YANG2, D. ATENCIO3...Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil Department of Geosciences, University of Arizona...Paulo, Rua do Lago 562, 05508-080 São Paulo, SP, Brazil Institute of Problems of Chemical Physics, Russian...Federal de Minas Gerais, Avenida Presidente Antonio Carlos 6627, 30123-970, Belo Horizonte, MG, Brazil Department...in the Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. It occurs as isolated octahedral and as |  | | 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...information concerningore analyses,exploration, reserves,mine maps, as well as the many other typesof aid so necessaryto |  | | Journal (article/letter/editorial) | | high-strain domain of the Quadrilátero Ferrı́fero, Brazil, hard and soft high-grade hematite ore may occur...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...terrains and Proterozoic crystalline rocks. The Minas Supergroup comprise, from bottom to top, Caraça... Universidade Federal de Minas Gerais, Belo Horizonte MG 31270-901, Brazil Fluid Inclusion and Metallogeny |  | | 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 |  | Andrade, M. B., Atencio, D., Chukanov, N. V., Ellena, J. (2013) Hydrokenomicrolite, (☐,H2O)2Ta2(O,OH)6(H2O), a new microlite-group mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. American Mineralogist, 98 (2) 292-296 doi:10.2138/am.2013.4186 | Journal (article/letter/editorial) | | Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil Marcelo B. Andrade,1,* Daniel Atencio,2 Nikita V....Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil 2 Departamento de Mineralogia e Geotectônica, Instituto...Paulo, Rua do Lago 562, 05508-080 São Paulo, SP, Brazil 3 Institute of Problems of Chemical Physics, Russian...in the Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. Associated minerals are: microcline, albite...fluorite, “apatite”, beryl, “garnet”, epidote, magnetite, gahnite, zircon, “tourmaline”, bityite, and other |  | | 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...fluids. The earliest mineralization formed massive magnetite-rich orebodies under relatively reducing conditions |  | | Report (issue) | | Pattern: Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. 3.052 (100), 6.112 (86), 3.191 (52), 1...35 (1) Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil; average of 3 wavelength-dispersive spectroscopic...fluorite, “apatite”, beryl, “garnet”, epidote, magnetite, gahnite, zircon, “tourmaline”, bityite. Distribution:...pegmatite, Sn-Ta-rich São João del Rei Pegmatite Province, Nazareno, Minas Gerais, Brazil. Name: For a member... University of São Paulo, SP, Brazil (DR725). References: (1) Andrade, M.B., D. Atencio, N.V. Chukanov |  | Andrade, M. B., Atencio, D., Persiano, A. I. C., Ellena, J. (2013) Fluorcalciomicrolite, (Ca,Na,☐)2Ta2O6F, a new microlite-group mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. Mineralogical Magazine, 77 (7) 2989-2996 doi:10.1180/minmag.2013.077.7.08 | Journal (article/letter/editorial) | | mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil M. B. ANDRADE1, D. ATENCIO2,*, A. I. C....São Paulo, SP, Brazil Departamento de Fı́sica, Universidade Federal de Minas Gerais, Av. Presidente...Antonio Carlos, 6627, 30123-970, Belo Horizonte, MG, Brazil Departamento de Fı́sica e Informática, Instituto...Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil [Received 29 May 2013; Accepted 8 September 2013;...in the Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. Associated minerals include: microcline |  | | 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 |  | 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...as infill of microfractures and interstices in magnetite aggregates (host rock fragments) within speculariterich...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 |  | | Journal (issue) | | iridescence observed in “rainbow” hematite from Minas Gerais, Brazil. 40 DNA Techniques Applied to the Identification...iridescence in metamorphic “rainbow” hematite from Brazil. The authors use electron microscopy, atomic force...colored by GR1 defects have been alluvial deposits in Brazil, Guyana, Venezuela, Zimbabwe, the Central African...never graded by GIA), and the 5.03 ct Aurora Green (Brazil), which sold at auction in 2016 for more than US...America has yielded a number of green diamonds from Brazil and Guyana (figure 7). Most show extensive surficial |  | Ivanyuk, Gregory Yu., Yakovenchuk, Victor N., Panikorovskii, Taras L., Konoplyova, Nataliya, Pakhomovsky, Yakov A., Bazai, Ayya V., Bocharov, Vladimir N., Krivovichev, Sergey V. (2019) Hydroxynatropyrochlore, (Na,Сa,Ce)2Nb2O6(OH), a new member of the pyrochlore group from the Kovdor phoscorite–carbonatite pipe, Kola Peninsula, Russia. Mineralogical Magazine, 83 (1) 107-113 doi:10.1180/minmag.2017.081.102 | Journal (article/letter/editorial) | | calcite, dolomite, forsterite, hydroxylapatite, magnetite,and phlogopite, accessory baddeleyite, baryte...2013; Yang et al., 2014; Jingwu et al., 2015; Andrade et al., 2013, 2015, 2016; Li et al., 2016; Fan...phoscorite of the marginal zone into low-carbonate magnetite-rich phoscorite of the intermediate zone and then...(30 modal %), hydroxylapatite (9 modal %) and magnetite (8 modal %). Characteristic accessory minerals...org/ 10.1180/minmag.2017.081.102 References Andrade, M., Atencio, D., Persiano, A. and Ellena, J. (2013) |  | | Journal (article/letter/editorial) | | carbonatefaciesis found in a eugeosynclinalsuite in Minas Gerais, Brazil, and is of the Algoma type. The depositsrange...indicatevolcanicaffiliations. The iron is present as magnetite, hematite, and martire; most rocks have been metamorphosed...surficial rock known as canga, depositsof Minas Gerais,Brazil, the presenceof which is very resistantto...varioustechnicalwor.ds ment of specularitcor flattenedlayersof magnetite. used in discussing iron-rich sedimentary rocks...Althoughsuchrocks are known in the paragneisses of Brazil, no good term has been developedto describethem |  | 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) | | the Conceição Iron Mine, Itabira District, Southern São Francisco Craton, Brazil: An Example of a Jacutinga-Type... Quebec, Canada H3C 3P8 Abstract The Conceição mine, which is located in the Itabira district, southern...an altered Lake Superior-type iron-formation. The mine sequence consists of three metamorphosed lithostratigraphic...hematite grains (hematite II) with remnants of magnetite, and a finely laminated envelope around the quartz...Examples of this deposit class include the Homestake mine in the United States (Rye and Rye, 1974; Sawkins |  | | Book | | De Vicenzi • Tre a-s u r e r s : Alberto de Andrade Oueiroz I Mauricio Wellisch Editorial committee... 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 |  | | Journal (article/letter/editorial) | | hematite ore at the Quadrilátero Ferrífero, Minas Gerais, Brazil and its possible genetic significance F...texture present in the all ores is the ubiquitous magnetite porphyroclasts replacement by hematite. Quartz...syntectonic recrystallisation’. Three generations of magnetite and four of hematite (hematite-I being considered...deposits of high-grade, compact hematite of QF, Minas Gerais, Brazil, averaging 68%Fe and < 1%SiO2, totalling...Fernandinho, Galinheiro, Mina do Pico e Sapecado (MBR mine properties). Apart from the initially estimated |  | | Journal (article/letter/editorial) | | Iron-formations of the Iron Quadrangle, Minas Gerais, Brazil W. Kessler and G. M/iller Institut ffir...from banded ironformation of the Iron Quadrangle, Brazil, did not yield any significant difference in minor...lattice types of magnetite and hematite. Mg and Mn are much more concentrated in magnetite than in hematite...gebdnderten Eisenerzvorlcommen des Eisernen Vierecks, Minas Gerais, Brasilien Chemische Analysen yon 192, unter...facies." Today Davy's statement is still valid. BRAZIL Itabira 17'ff I( 0 Rio Piracicaba Beto Horizonte |  | | Journal (article/letter/editorial) | | Arehaean and Lower Proterozoic Units in Central Brazil By Jos6 Caruso M. DANNI, tleinhardt A. FvcK and...recognized as Archaean basement rocks in central Brazil: a) High-grade granite-gneiss terrain composed...Geoci~neias, Universidade de Brasilia, 70.910 Brasilia, Brazil. Band 71, Heft 1, 1982, SeRe 291--317 29"[ J...of the Preeambrian basement terrains in central Brazil has allowed the recognition and delimitation of...Porto Nacional in the north of Goi~s to western Minas GerMs, including the granulitized mafic-nltramafic |  | | 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 |  | Andrade, Marcelo B., Atencio, Daniel, Menezes Filho, Luiz A. D., Spratt, John (2018) Melcherite, trigonal Ba2Na2Mg[Nb6O19]·6H2O, the second natural hexaniobate, from Cajati, São Paulo, Brazil: Description and crystal structure. Mineralogical Magazine, 82 (1) 111-120 doi:10.1180/minmag.2017.081.026 | Journal (article/letter/editorial) | | second natural hexaniobate, from Cajati, São Paulo, Brazil: Description and crystal structure MARCELO B. ANDRADE1...Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil Departamento de Mineralogia e Geotectônica, Instituto...São Paulo, SP, Brazil Instituto de Geociências, Universidade Federal de Minas Gerais, Avenida Antonio...Antonio Carlos 6627, 31270-901, MG, Brazil. Core Research Laboratories, Natural History Museum, Cromwell Road...Jacupiranga mine, Cajati county, São Paulo state, Brazil, associated with dolomite, calcite, magnetite, pyrrhotite |  | | Report (issue) | | Pattern: Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. 3.005 (100), 3.138 (83), 5.997 (59), 2...23 (1) Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil; average of 6 electron microprobe analyses...fluorite, “apatite,” beryl, “garnet,” epidote, magnetite, gahnite, zircon, “tourmaline,” bityite, hydrokenomicrolite...From the Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. Also at the Harding pegmatite, New Mexico...Museum, University of Sãn Paulo, Brazil (DR731). References: (1) Andrade, M.B., D. Atencio, A.I.C. Persiano |  | | Journal (article/letter/editorial) | | Citation: Lopes, G.A.C.; Atencio, D.; Ellena, J.; Andrade, M.B. Roméite-Group Minerals Review: New Crystal...1409. https://doi.org/10.3390/ and Marcelo B. Andrade 1, * São Carlos Institute of Physics (IFSC), University...University of São Paulo (USP), São Carlos 13566-590, SP, Brazil; g.anderson@ifsc.usp.br (G.A.C.L.); javiere@ifsc...State University (UEAP), Macapá 68900-070, AP, Brazil Institute of Geosciences (IGc), University of São...São Paulo (USP), São Paulo 05508-080, SP, Brazil; datencio@usp.br Correspondence: mabadean@usp.br Abstract: |  | Olivo, Gema Ribeiro, Gauthier, Michel, Bardoux, Marc, Leao de Sa, Euripedes, Fonseca, Jose Teotonio F., Santana, Fernando Carbonari (1995) Palladium-bearing gold deposit hosted by Proterozoic lake superior-type iron-formation at the Caue iron mine, Itabira District, southern Sao Francisco Craton, Brazil; geologic and structural controls. Economic Geology, 90 (1) 118-134 doi:10.2113/gsecongeo.90.1.118 | Journal (article/letter/editorial) | | ion at the Cau Iron Mine, Itabira District, Southern SaoFrancisco Craton,Brazil: GeologicandStructuralControls...Rio Dote, Itabira, MinasGerais,Brazil 35900-900 Abstract The Cau• iron mine is located in the Itabira district...known as a major producerof iron ore (Doff, Mariana mine), and Lake Superior-typeiron-formations Introduction...whichgoldandpalladiumoccurtogetherin a Proterozoie The Morro Velho mine alone hasproducedabout 500 t Lake Superior-type...Bento mines)and mylonitized volcano-sedimentary Soeo mine and 5 tons from 1865 to 1896 from the Marocks(e |  | | 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...concentration of that stream. However, even if magnetite is present only in the form of crystal relicts...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 |
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