 | | 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) | | 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) | | inclusion in vein. FIGURE 3. GARGAS MINE, NEAR COKINTO, MINAS GERAIS Wall rock is decomposed Bambui shale...PEDRO MINE, CRISTALINA, GOIAZ Wall rock is sandstone. Photo by E. II. Payne. Fir.uHi-: 5. Juiz MINE, FAZHNDA...FAZHNDA CAPAO, MINAS GERAIS Pile of well-formed, but milky, crystals from vugs in sandstone. Photo by...COMB QUARTZ In sandstone at edge of pipe. ALF.GKK MINE, BAIIIA Outcrop Map of Onca-Pacu Crystal...where p^^KJgtj accurately located . Open cuta and mine facet. M,n* dumps. Contour interval IS m»t»r« A»»um»d |  | | Journal (article/letter/editorial) | | Trace-element Data of Iron Oxides from Iron-formations of the Iron Quadrangle, Minas Gerais, Brazil W. Kessler and...from banded ironformation of the Iron Quadrangle, Brazil, did not yield any significant difference in minor...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...Morro Jacutinga, 13 Agua Limpa, 14 Morro Agudo, 16 Andrade, 17 Pigarr~o, 18 Cau~, 19 Conceig~o;--9 road cut |  | | 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 |  | Atencio, D., Roberts, A. C., Cooper, M. A., Filho, L. A. D. Menezes, Coutinho, J. M. V., Stirling, J. A. R., Venance, K. E., Ball, N. A., Moffatt, E., Chaves, M. L. S. C., Brandão, P. R. G., Romano, A. W. (2012) Carlosbarbosaite, ideally (UO2)2Nb2O6(OH)2·2H2O, a new hydrated uranyl niobate mineral with tunnels from Jaguaraçu, Minas Gerais, Brazil: description and crystal structure. Mineralogical Magazine, 76 (1) 75-90 doi:10.1180/minmag.2012.076.1.75 | Journal (article/letter/editorial) | | niobate mineral with tunnels from Jaguaraçu, Minas Gerais, Brazil: description and crystal structure D. ATENCIO1...Paulo, Rua do Lago, 562, 05508-080 São Paulo, SP, Brazil Geological Survey of Canada, 601 Booth Street,...Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil Canadian...de Engenharia de Minas, Escola de Engenharia da Universidade Federal de Minas Gerais, Avenida Antônio...Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil [Received 31 December 2010; Accepted 1 December |  | | 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 |  | | 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...commodities, including gold, diamonds, iron, manganese, alumina, base metals, PGM, Ni, rutile, Ti, kaolin |  | | 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 ...formation and associated deposits of hematite and manganese ores .-Prepared in cooperation with the Departamento...Departamento N acional da Produ~ao M,ineral of Brazil under the auspices of the International Cooperation |  | 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 (issue) | | Bou-Azzer, 9:69-73 Toussit mine, 11:59-61, 15:347-350 NAMIBIA Kombat mine, 22:421-425 Tsumeb (special...Kalahari Manganese Field, 9:137-153 The Messina mining district, 22:187-199 The Palabora mine, 22:255-262...22:255-262 The Kalahari Manganese Field, an update, 22:279-297 Gold in South Africa, 23:209-225, 228 The Jan...Jan Coetzee mine, 24:39-40 The Wessels mine, 24:365-368 The Kruisrivier cobalt mine, 27:417-428 The Bushveld...region, 20:265-288 The Mashamba West mine, 22:13-20, 28 The Kipushi mine, 26:163-192 Cobalt minerals of the |  | | Journal (issue) | | crystal, 75 mm long, from the Cruzeiro mine, Minas Gérais, Brazil. See 'The location, geology and mineralogy...mineralogy of gem tourmalines in Brazil' on pp. 263-98 ISSN: 1355-4565 262 J. G e m m , 1996, 25, 4 ...location, geology and mineralogy of gem tourmalines in Brazil Jacques P. Cassedanne, Dr. Sc. *, and Maurice Roditi...tourmaline is the 'Eastern pegmatitic province' of Minas Gerais. One general and three detailed maps of specific...Non-pegmatitic deposits of tourmaline include the Brumado mine (Bahia) which produces fine red uvite crystals and |  | Dybowska, Agnieszka, Schofield, Paul, Newsome, Laura, Herrington, Richard, Mosselmans, Julian, Kaulich, Burkhard, Kazemian, Majid, Araki, Tohru, Skiggs, Thomas, Kruger, Jens, Oxley, Anne, Norman, Rachel, Lloyd, Jonathan (2022) Evolution of the Piauí Laterite, Brazil: Mineralogical, Geochemical and Geomicrobiological Mechanisms for Cobalt and Nickel Enrichment. Minerals, 12 (10) 1298 doi:10.3390/min12101298 | Journal (article/letter/editorial) | | minerals Article Evolution of the Piauí Laterite, Brazil: Mineralogical, Geochemical and Geomicrobiological...Kruger, J.; et al. Evolution of the Piauí Laterite, Brazil: Mineralogical, Geochemical and Geomicrobiological...schofield@nhm.ac.uk Abstract: The Piauí laterite (NE Brazil) was initially evaluated for Ni but also contains...regions such as Australia, USA, Central America, Brazil, Madagascar, Kazakhstan, Russia, Turkey, Greece...Distinct laterite deposits are distributed throughout Brazil though they are less common in the south and northeastern |  | | Journal (article/letter/editorial) | | Amsterdam - - Printed in The Netherlands 279 Manganese deposits in the global lithogenetic system: Quantitative...February 20, 1992 ) ABSTRACT Laznicka, P., 1992. Manganese deposits in the global lithogenetic system: Quantitative...useful metals". Charles Meyer (1981) Introduction Manganese considered in a geoscientific context has a vast...annually (i.e., those titles where the keyword manganese appears in the title) and a minimum of 3000 titles...Borchert, 1978; Varentsov and Grasselly, 1980); manganese geochemistry (Ronov and Yermishkina, 1959; Strakhov |  | | Journal (article/letter/editorial) | | Relationship of copper with hydrous ferric oxides: Salobo, Caraj s, PA, Brazil Marcello M. Veigaa, Hans D. Schorschera...Inst. Geosciencias Cx. P. 20899, Sao Paulo 01498, Brazil bUniversity of Western Ontario, Department of Geology...Relationship of copper with hydrous ferric oxides: Salobo, Carajds, PA, Brazil. In: W. Petruk, A.H. Vassiliou and...copper ore from Salobo 3A, Caraj~is, state of Pard, Brazil, totalling 107 × 106 t of ore grading 0.75% Cu...an intimate relation of Cu with hydrous ferric oxides (HFO). Chemical HFO removal with combined reagent |  | | Book (edition) | | 283 12 HYPOTHERMAL DEPOSITS 293 Morro Velho, Brazil 297 Broken Hill, New South Wales, Australia 221...MESOTHERMAL DEPOSITS 317 Coeur d’Alene, Idaho 319 Magma Mine, Arizona 325 Chuquicamata, Chile 333 14 EPITHERMAL...Nickel Deposits of New Caledonia Morro da Mina, Brazil 470 Bauxite Deposits of Jamaica 472 466 19 SUPERGENE...Besides, what we are pleased to call the riches of a mine, are riches relatively to a distinction which nature...classified as ore minerals. For example, simple iron oxides, such as magnetite and hematite, are ore minerals |  | Franchini, M., Lira, R., Meinert, L., Rios, F. J., Poklepovic, M. F., Impiccini, A., Millone, H. A. (2005) Na-Fe-Ca Alteration and LREE (Th-Nb) Mineralization in Marble andGranitoids of Sierra de Sumampa, Santiago del Estero, Argentina. Economic Geology, 100 (4) 733-764 doi:10.2113/gsecongeo.100.4.733 | Journal (article/letter/editorial) | | Nuclear Technological (CDTN-CNEN), Belo Horizonte, Brazil MARÍA FERNANDA POKLEPOVIC, CONICET, Museo de Mineralogía...Ca-Mn-Mg-Fe carbonates associated with iron and manganese oxides, hematite, and traces of sulfides (sphalerite...to determine the economic feasibility of the manganese district located in the southwestern corner of...north-south, enclosing a cluster of 11 epithermal manganese mining districts that include more than 100 claims...Physics Institute of the Federal University of Minas Gerais, Belo Horizonte (UFMG-FAPEMIGFINEP). Thirty-three |  | | 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 |  | Ta, Christine, Brugger, Joël, Pring, Allan, Hocking, Rosalie K., Lenehan, Claire E., Reith, Frank (2015) Effect of manganese oxide minerals and complexes on gold mobilization and speciation. Chemical Geology, 407. 10-20 doi:10.1016/j.chemgeo.2015.04.016 | Journal (article/letter/editorial) | | homepage: www.elsevier.com/locate/chemgeo Effect of manganese oxide minerals and complexes on gold mobilization...Editor: Dr. J. Fein Keywords: Gold Oxidation Mn-oxides Speciation Water HPLC–ICP-MS a b s t r a c t (Bio)geochemical...authors have argued that highly reactive manganese (Mn) oxides are involved in oxidizing, and hence mobilizing...Therefore, this paper explores the links between Mn-oxides and the oxidation/ mobilization of Au under acidic...possibly Au(III) involves the oxidation by reactive Mn-oxides (e.g., Boyle, 1979). Krauskopf (1951) used Latimer |  | | Book (edition) | | Antônio Cedraz Nery G en er a l D i r e c to r João César de Freitas Pinheiro G en er a l D i r e c...BRA ZILIAN GEMS AND JEWELLERY TRADE ASSOCIATION João Ferreira Gomes D el i b er at i v e Co u n ci l...Data (CIP) (Information Sectorial Nucleus, SP, Brazil) I59 IBGM. Handbook of Gems / IBGM, DNPM. – 4...I. Title. CDU 549.091 Federative Republic of Brazil Ministry of Mines and Energy National Department...respect to the most commonly found and traded gems in Brazil. Such information is generally described in documents |  | | Journal (article/letter/editorial) | | of iron ore from Mesoarchean BIF at the Wodgina mine, Western Australia Y. Teitler, P. Duuring & S. G...of iron ore from Mesoarchean BIF at the Wodgina mine, Western Australia, Australian Journal of Earth...of iron ore from Mesoarchean BIF at the Wodgina mine, Western Australia Y. Teitlera,b, P. Duuringa and...camp-scale recrystallisation of pre-existing iron oxides to form euhedral magnetite, with local enrichment...siliciclastic rocks located throughout the Wodgina mine. Received 25 August 2016 Accepted 16 November 2016 |  | Burkhardt, Eva-Maria, Meißner, Sylvia, Merten, Dirk, Büchel, Georg, Küsel, Kirsten (2009) Heavy metal retention and microbial activities in geochemical barriers formed in glacial sediments subjacent to a former uranium mining leaching heap. Geochemistry, 69. 21-34 doi:10.1016/j.chemer.2008.12.003 | Journal (article/letter/editorial) | | barriers. Cd, Ni, and Co accumulated in a greyish, manganese-rich layer, whereas the metalloid As and the metals...reddish-brown, iron-rich layer. Crystalline iron oxides, mainly goethite, served as important heavy metal...the reddish-brown, iron-rich layer. Iron and manganese oxides occurred mainly as a cover on quartz grains...sandy sediment matrix. On a molar basis, the manganese oxide barrier appeared to be more effective in...Geochemical barrier; Mining; Microbial iron reduction; Manganese oxide; Goethite; Heavy metal tolerance 1. Introduction |  | | Book | | Manganese Ores of Supergene Zone: Geochemistry of Formation by IGOR M. VARENTSOV Geological Institute...1930s-1990s 1.3. Methodical Aspects 1 6 15 2. MANGANESE ORES IN WEATHERING CRUSTS 20 2.1. Introduction...1.3. Stratigraphy 2.2.1.4. Structure 2.2.1.5. Manganese Oxyhydroxide Ores 2.2.1.5.1. Structure of the...the Late Stages of Oxyhydroxide Ore Formation (Manganese Cap (Cuirass» 2.2.3.3.1. General characteristics...Ores) 2.2.3.5. Formation History of the Major Manganese Ore Minerals 112 115 118 118 120 121 123 124 |  | | Journal (article/letter/editorial) | | the Igarap6BahiaLateriticGold Deposit, Carajfts,Brazil WEISHENG ZANG AND WILLIAM S. FYFE Departmentof...lateriteisunderdevelopment in the CarajS. s regionof Brazil. The lateriticprofileof the Igarap6Bahiadeposit...rift (Lindenmayer, 1990), where gold, copper,manganese,and iron depositsoccur,somevery large. The regional...$4.00 1768 IGABAPt•BAHIALATERITICAu DEPOSIT,BRAZIL 50'30'W 50'00'W ITrf, '.'.'.'.', .... 1769...coppermineralization. IGARAPI•'BAHIALATERITICAu DEPOSIT,BRAZIL 1771 TABES 1. MineralAssemblages of the LateriteProfilein |  | Broom-Fendley, Sam, Wall, Frances, Spiro, Baruch, Ullmann, Clemens V. (2017) Deducing the source and composition of rare earth mineralising fluids in carbonatites: insights from isotopic (C, O, 87Sr/86Sr) data from Kangankunde, Malawi. Contributions to Mineralogy and Petrology, 172 (11) doi:10.1007/s00410-017-1412-7 | Journal (article/letter/editorial) | | low-temperature fluids (< 125 °C), causing exsolution of Fe oxides resulting in the dark colour of these rocks. REE-rich...al. 1998, 2002, 2015); Barra do Itapirapuã, Brazil (Andrade et al. 1999; Ruberti et al. 2008); and the...a trend toward 18O- and 13C-enrichment (e.g., Andrade et al. 1999; Downes et al. 2014; Trofanenko 13...drops of conc. H2O2 were added to dissolve manganese oxides before diluting to 250 ml with water. During...counterpart (Chai and Navrotsky 1996), into iron oxides and dolomite or, occasionally, calcite. Isotopic |
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