 | | Journal (article/letter/editorial) | | BOTRYOIDAL PLATINUM, PALLADIUM AND POTARITE FROM THE BOM SUCESSO STREAM, MINAS GERAIS, BRAZIL: COMPOSITIONAL...13506-900 Brazil ABSTRACT PlatinumâPd nuggets from the Bom Sucesso stream alluvium, Minas Gerais, Brazil...is progressively oscillatory zoned by palladian platinum, with growth eventually enveloping the whole botryoidal...âcolonyâ, to a narrow rim of palladian platinum or pure platinum. Other nuggets comprise an arborescent...zone of either pure platinum or palladian platinum, and a narrow rim of platinum. The mineral palladium |  | Kwitko, R., Cabral, A. R., Lehmann, B., Laflamme, J.H. G., Cabri, L. J., Criddle, A. J., Galbiatti, H. F. (2002) HONGSHIITE, PtCu, FROM ITABIRITE-HOSTED Au Pd Pt MINERALIZATION (JACUTINGA), ITABIRA DISTRICT, MINAS GERAIS, BRAZIL. The Canadian Mineralogist, 40 (2) 711-723 doi:10.2113/gscanmin.40.2.711 | Journal (article/letter/editorial) | | MINERALIZATION (JACUTINGA), ITABIRA DISTRICT, MINAS GERAIS, BRAZIL ROGERIO KWITKO§ Centro de Desenvolvimento...Doce, BR 262/ km 296, 33030-970 Santa Luzia â MG, Brazil ALEXANDRE R. CABRAL§ AND BERND LEHMANN Institut...Companhia Vale do Rio Doce, 35900-900 Itabira-MG, Brazil ABSTRACT Hongshiite occurs associated with palladian...palladian gold, and more rarely with native platinum, in the sulfide-free, hematite-rich jacutinga mineralization...mineralization of the QuadrilĂĄtero FerrĂfero, central Minas Gerais, Brazil. Hongshiite occurs in grains up to about |  | | Journal (article/letter/editorial) | | palladian gold nugget (Gongo Soco iron ore mine, Minas Gerais, Brazil) A. RAPHAEL CABRAL* AND B. LEHMANN...(âjacutingaâ) of the Gongo Soco iron ore mine, QuadrilaÌtero FerrԎfero, Minas Gerais, allows the definition of...Gongo Soco, Itabira Iron Formation, QuadrilaÌtero FerrԎfero, Minas Gerais, Brazil. Introduction NATIVE...mineralization (âjacutingaâ) of Gongo Soco, Minas Gerais, the same locality which provided the  rst...when Wollaston (1809) documented palladium among platinum grains A. RAPHAEL CABRAL AND B. LEHMANN FIG |  | | Journal (article/letter/editorial) | | minerals of palladium and platinum from ouro preto-bearing mineralisation in Brazil Alexandre Raphael Cabral...that triggered two major gold rushes in Brazil (Minas Gerais and Serra Pelada). The auriferous mineralisations...mineralisations of Gongo Soco and Itabira, Minas Gerais, and Serra Pelada, ParĂĄ, have PdâO-bearing, dark-coloured...number of seleniferous minerals of palladium and platinum can be found: chrisstanleyite, Ag2Pd3Se4, a phase...Gongo Soco; Itabira; Serra Pelada; Brazil 1. Introduction Brazil had two major gold rushes. The first |  | Raphael Cabral, A., Lehmann, B., Kwitko, R., Jones, R. D., Pires, F. R. M., Rocha Filho, O. G., Innocentini, M. D. (2001) Palladium-oxygenated compounds of the Gongo Soco mine, QuadrilĂĄtero FerrĂfero, central Minas Gerais, Brazil. Mineralogical Magazine, 65 (2) 169-179 doi:10.1180/002646101550208 | Journal (article/letter/editorial) | | mine, QuadrilaÌtero FerriÌfero, central Minas Gerais, Brazil A. RAPHAEL CABRAL1,*, B. LEHMANN1, R. KWITKO2...296 Caixa Postal 09, 33030-970 Santa Luzia-MG, Brazil 3 1636 East Skyline Drive, Tucson, AZ 85178, USA...Cidade UniversitaÌria, 21949-900 Rio de Janeiro-RJ, Brazil 5 Mineraça~o Socoimex Ltda., Fazenda Gongo Soco...Soco, Caixa Postal 42, 34800-000 CaeteÌ-MG, Brazil ABSTR ACT New data on the Gongo Soco palladium-oxygenated...(black gold) and jacutinga (auriferous itabirite/iron ore) is the result of mertieite-II alteration. It |  | | Journal (article/letter/editorial) | | Palladian gold from the Cau iron mine, Itabira District, Minas Gerais, Brazil G. R. OLIVO,M. GAUTHIERAND...Palladian gold from the Cau~ iron mine, Itabira District, Minas Gerais, Brazil is found in horizons of h...hydrothermally-altered Lake Superior-type oxide-facies iron-formation locally called jacutinga. Palladium content...Sl-fabrics. K~VWOROS: gold, palladium, Itabira, Brazil, iron-formation, jacutinga. Introduction IT is known...Devon, England (Clark and Criddle, 1982); and in Brazil from the Serra Pelada deposit, in Par~ State (Meireles |  | 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), CauĂȘ iron-ore mine, QuadrilĂĄtero FerrĂfero, Minas Gerais, Brazil. Mineralogical Magazine, 66 (2) 327-336 doi:10.1180/0026461026620033 | Journal (article/letter/editorial) | | (jacutinga), Caueâ iron-ore mine, Quadrila€tero Ferr|€ fero, Minas Gerais, Brazil A. R. CABRAL1,*, B...Luzia-MG, Brazil 3 Diretoria de Metais Nobres, Companhia Vale do Rio Doce, 35900-900 Itabira-MG, Brazil ABSTR...jacutinga, CaueÌ iron-ore mine, Itabira Iron Formation, QuadrilaÌtero FerrıÌfero, Brazil. Introduction...by Palaeoproterozoic banded iron formation (itabirite) at the CaueÌ iron-ore mine, Itabira (Olivo and...The characterization of alteration phases after platinum-group minerals is signiïŹcant for the understanding |  | | Journal (article/letter/editorial) | | Palladium minerals from the Caua iron mine, Itabira District, Minas Gerais, Brazil GFMA RIBEIROOLIVOANDMICHELGAUTHIER...Palladium-bearing minerals from the Cau~ iron mine, Itabira District, Minas Gerais, Brazil, are found in goldrich jacutinga...Lake Superior-type carbonate-bearing oxide facies iron-formation. Palladium occurs as: native palladium...minerals, palladseite, arsenopalladinite, CauE mine, Brazil, jacutinga. Introduction minerals, but as most...palladium-bearing gold ore of the Cau~ iron mine, Itabira District, Brazil, are reported and discussed in terms |  | Cabral, A. R., Lehmann, B., Galbiatti, H. F., Rocha Filho, O. G. (2006) Evidence for metre-scale variations in hematite composition within the Palaeoproterozoic Itabira Iron Formation, Minas Gerais, Brazil. Mineralogical Magazine, 70 (5) 591-602 doi:10.1180/0026461067050352 | Journal (article/letter/editorial) | | within the Palaeoproterozoic Itabira Iron Formation, Minas Gerais, Brazil A. R. CABRAL1,*, B. LEHMANN2, H...Companhia Vale do Rio Doce, Itabira MG, 35900-900, Brazil 4 Companhia Vale do Rio Doce, Fazenda Gongo Soco...Soco, BaraÌo de Cocais MG, 35970-000, Brazil 2 ABSTR ACT Hematite is a mineral the chemical composition...the mineral chemistry of hematite in Precambrian iron formations, where hematite forms monomineralic high-grade...Electron microprobe analysis of hematite from two iron-ore deposits, CaueÌ (Itabira district) and Gongo |  | Cabral, A. R., Zeh, A., Galbiatti, H. F., Lehmann, B. (2015) LATE CAMBRIAN Au-Pd MINERALIZATION AND Fe ENRICHMENT IN THE ITABIRA DISTRICT, MINAS GERAIS, BRAZIL, AT 496 Ma: CONSTRAINTS FROM U-Pb MONAZITE DATING OF A JACUTINGA LODE. Economic Geology, 110 (1) 263-272 doi:10.2113/econgeo.110.1.263 | Journal (article/letter/editorial) | | AND Fe ENRICHMENT IN THE ITABIRA DISTRICT, MINAS GERAIS, BRAZIL, AT 496 MA: CONSTRAINTS FROM U-Pb MONAZITE...Ferrosos, Vale, MiguelĂŁo, 34000-000 Nova Lima-MG, Brazil Abstract Bonanza-style mineralization of palladiferous...century in the province that became known as Minas Gerais. The timing of this itabirite-hosted vein mineralization...events recorded in the QuadrilĂĄtero FerrĂfero of Minas Gerais, the ~2.0 Ga Transamazonian event and the ~0...also affected surrounding Neoarchean rocks of the Minas Supergroup, as well as younger rocks of the southern |  | 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) | | at the Conceição Iron Mine, Itabira District, Southern SĂŁo Francisco Craton, Brazil: An Example of a...hosted by jacutinga, an altered Lake Superior-type iron-formation. The mine sequence consists of three metamorphosed...volcano-sedimentary sequence, (2) a Paleoproterozoic iron-formation, and (3) a Paleoproterozoic quartzite...model for gold and palladium concentration in the iron-formation. Since the Cretaceous, these Archean and...reprecipitated as pure metals or Pd oxides. Introduction IRON-FORMATIONS host significant gold deposits throughout |  | Galbiatti, H.F., Fonseca, M.A., Pereira, M.C., PolĂŽnia, J.C. (2007) Structural control of AuâPd mineralization (Jacutinga): An example from the CauĂȘ Mine, QuadrilĂĄtero FerrĂfero, Brazil. Ore Geology Reviews, 32 (3) 614-628 doi:10.1016/j.oregeorev.2005.03.020 | Journal (article/letter/editorial) | | example from the CauĂȘ Mine, QuadrilĂĄtero FerrĂfero, Brazil H.F. Galbiatti a,â, M.A. Fonseca b , M.C. Pereira...Rio Doce, Minas de Itabira, Serra do Esmeril S/N, Mina CauĂȘ, 35900-900 Itabira, MG, Brazil b Departamento...Federal de Ouro Preto. 35.400-000, Ouro Preto, MG, Brazil Received 1 December 2001; accepted 31 March 2005...online 15 February 2007 Abstract Precambrian banded iron formations (BIFs) in the QuadrilĂĄtero FerrĂfero...northeastern part of QuadrilatĂ©ro FerrĂfero, Minas Gerais. Structural analysis reveals two important features |  | 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) | | mation at the Cau Iron Mine, Itabira District, Southern SaoFrancisco Craton,Brazil: GeologicandStructuralControls...Rio Dote, Itabira, MinasGerais,Brazil 35900-900 Abstract The Cauâą iron mine is located in the Itabira...ion unit;and(3) a Proterozoicquartziteunit. The iron-formationunit is cut by amphibolitedikesand tec...folding andassociated thrustingandboudinage. In the iron-formation unit,theDâą andDâą structures havebeen generatedby...metamorphosed, hydrothermallyalteredLake Superior-type iron-formation composed of hematite,quartz,talc,phlogopite |  | | Journal (article/letter/editorial) | | com/loi/tigr20 Geology and Mineral Resources of Brazil: A Review a a Inacio De Medeiros Delgado , Augusto...Pesquisa de Recursos Minerals, Scdvador, Bahia, Brazil b US. Geological Survey, Denver, CO, 80225 Version...Thorman (1994): Geology and Mineral Resources of Brazil: A Review, International Geology Review, 36:6,...rights reserved. Geology and Mineral Resources of Brazil: A Review INACIO DE MEDEIROS DELGADO, AUGUSTO J...Pesquisa de Recursos Minerals, Scdvador, Bahia, Brazil AND CHARLES H. THORMAN US. Geological Survey, Denver |  | Filippov, Lev O., Silva, Klaydison, Piçarra, Alexandre, Lima, Neymayer, Santos, Iranildes, Bicalho, Leandro, Filippova, Inna V., Peres, Antonio Eduardo Clark (2021) Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant. Minerals, 11 (7) 699 doi:10.3390/min11070699 | Journal (article/letter/editorial) | | minerals Article Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant...V.F.) VALE S.A.âIron Ore Beneficiation Development Team, Nova Lima 34006-200, Brazil; neymayer.lima@vale...Preto 35400-000, Brazil; iranildes.santos@itv.org Clariant, Belo Horizonte 31710-400, Brazil; leandro.bicalho@clariant...UFMG (Federal University of Minas Gerais), Belo Horizonte 31270-901, Brazil; aecperes@demet.ufmg.br Correspondence:...Abstract: This work describes the concentration of iron ore slimes on a pilot scale by using a 500-mm diameter |  | LĂŒders, Volker, Romer, Rolf L., Cabral, Alexandre R., Schmidt, Christian, Banks, David A., Schneider, Jens (2005) Genesis of itabirite-hosted AuâPdâPt-bearing hematite-(quartz) veins, QuadrilĂĄtero FerrĂfero, Minas Gerais, Brazil: constraints from fluid inclusion infrared microthermometry, bulk crush-leach analysis and UâPb systematics. Mineralium Deposita, 40 (3) 289-306 doi:10.1007/s00126-005-0024-8 | Journal (article/letter/editorial) | | hematite-(quartz) veins, QuadrilaÌtero FerrıÌfero, Minas Gerais, Brazil: constraints from fluid inclusion infrared...mineralization consists of veins that cross-cut metamorphosed iron formation (itabirite) of the Paleoproterozoic Itabira...microscopy Ă UâPb Ă Jacutinga veins Ă AuâPdâPt Ă Minas Gerais Introduction Present address: A. R. Cabral...occurrences of economic importance seem to be known from Brazil 290 only. During the Brazilian Gold Cycle (1695â1785)...Preto (Minas Gerais) presumably came from palladian gold mineralization hosted by banded iron formations |  | Morgan, Rachael, Orberger, Beate, RosiĂšre, Carlos A., Wirth, Richard, Carvalho, Camila da Mota, Bellver-Baca, M. Teresa (2013) The origin of coexisting carbonates in banded iron formations: A micro-mineralogical study of the 2.4Ga Itabira Group, Brazil. Precambrian Research, 224. 491-511 doi:10.1016/j.precamres.2012.10.013 | Journal (article/letter/editorial) | | in banded iron formations: A micro-mineralogical study of the 2.4 Ga Itabira Group, Brazil Rachael Morgan...Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil d Helmholtz Centre...Available online 24 October 2012 Keywords: Banded iron formations Carbonate QuadrilĂĄtero FerrĂfero Paleoproterozoic...and sideroplesite in the 2.4 Ga Itabira Group, Brazil. The Itabira Group hosts silicic and dolomitic...are relatively uncommon in the Archaean, banded iron formations (BIFs) are widespread. Many BIFs are |  | | 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 |  | | Journal (issue) | | Rossman The Indaia Sapphire Deposits of Minas Gerais, Brazil David S. Epstein, Warren Brennan, and Tulio...located in eastern Bolivia, near the border with Brazil [figure 2). The Anahi mine produces ametrine crystals...1986) described similar material purportedly from Brazil. There are also some accounts that the deposit...Anahi area and on importing the gem material into Brazil, early reports identified the source as being in...virtually impossible for gems mined in Bolivia to enter Brazil legally. To circumvent these restrictions, the |  | Gagen, Emma J., Levett, Alan, Paz, Anat, Gastauer, Markus, Caldeira, CecĂlio Frois, Valadares, Rafael Borges da Silva, Bitencourt, JosĂ© Augusto Pires, Alves, Ronnie, Oliveira, Guilherme, Siqueira, Jose Oswaldo, Vasconcelos, Paulo M., Southam, Gordon (2019) Biogeochemical processes in canga ecosystems: Armoring of iron ore against erosion and importance in iron duricrust restoration in Brazil. Ore Geology Reviews, 107. 573-586 doi:10.1016/j.oregeorev.2019.03.013 | Journal (article/letter/editorial) | | armoring of iron ore against erosion and importance in iron duricrust restoration in Brazil Emma J. Gagen...armoring of iron ore against erosion and importance in iron duricrust restoration in Brazil, Ore Geology...armoring of iron ore against erosion and importance in iron duricrust restoration in Brazil Emma J. Gagena1...ParĂĄ, Brazil 1 Corresponding author: emma.gagen@gmail.com Abstract Supergene enriched iron ore deposits...deposits in Brazil are typically blanketed by goethite-cemented breccias that form a protective duricrust |  | Hazen, R. M., Golden, J., Downs, R. T., Hystad, G., Grew, E. S., Azzolini, D., Sverjensky, D. A. (2012) Mercury (Hg) mineral evolution: A mineralogical record of supercontinent assembly, changing ocean geochemistry, and the emerging terrestrial biosphere. American Mineralogist, 97 (7) 1013-1042 doi:10.2138/am.2012.3922 | Journal (article/letter/editorial) | | Itabira, Minas Gerais, Brazil, and at Serra Pelada (Serra Leste) Au-(Pd-Pt) deposit, ParĂĄ, Brazil (Bindi...Tertiary, when goethite deposits formed in the banded iron formations of the Hamersley basin near Mount Tom...Department Grundmann and Lehrberger (1990) BR01 Brazil Serra Pelada Deposit, CarajĂĄs mineral prov., ParĂĄ...BR02 Itabira, Iron Quadrangle, Minas Gerais Cabral et al. (2002) BR03 Serro, Minas Gerais Richardson (1988)...Africa South Africa Brazil Canada Sweden U.S.A. Australia Brazil Russia Austria Brazil Morocco Morocco Namibia |  | | Journal (article/letter/editorial) | | and environmental contamination in the Iron Quadrangle, BrazilâJörg Matschullat, Ricardo Perobelli Borba...under lateritic conditions, MaquinĂ© Mine, Minas Geraies, BrazilâC.A.C. VarĂŁjao, F. Colin, P. Viellard, A...Blackburn, and J.E. Gagnon 1405 The oxidation ratio of iron in coexisting biotite and hornblende from granitic...carbonado from Poxoreo district, Mato-Grosso State (Brazil)âA.I. Gorshkov, S.F. Vinokurov, I.D. Ryabchikov...latosol, colluvium, lateritic iron crust and gossan in CarajĂĄs, Brazil: Importance for primary ore i |  | | Journal (article/letter/editorial) | | minerals Article On the Recovery of Hematite from an Iron Ore Fine Fraction by Electroflotation Using a Biosurfactant...of Rio de Janeiro, Rio de Janeiro RJ 22453-900, Brazil; carolina.simoesca2@gmail.com (C.R.S.); rojas@esp...of fines and ultrafine particles of an itabiritic iron ore using a biosurfactant extracted from Rhodococcus...current density. It was observed that the iron recovery (%) and iron grade (%) were negatively affected by...both response variables. An iron recovery value of about 83% and an iron grade of about 59% were achieved |  | Levett, Alan, Vasconcelos, Paulo M., Gagen, Emma J., Rintoul, Llew, Spier, Carlos, Guagliardo, Paul, Southam, Gordon (2020) Microbial weathering signatures in lateritic ferruginous duricrusts. Earth and Planetary Science Letters, 538. 116209 doi:10.1016/j.epsl.2020.116209 | Journal (article/letter/editorial) | | a c t Iron-rich duricrusts (canga) that blanket iron ore deposits in tropical regions in Brazil have a...microorganisms in the biogeochemical cycling of iron and remarkably aluminium, which is critical for...grains, portions of which have been metasomatised by iron in solution, from new mineral precipitates within...weathering of grains within canga appears to promote iron, aluminium and titanium oxide mineral dissolution...the authigenic cements in canga. Aqueous ferrous iron, which is sensitive to changes in the oxidation |  | | Journal (article/letter/editorial) | | carbonates from the Minas Supergroup, QuadrilĂĄtero FerrĂfero (Iron Quadrangle), Brazil: A stratigraphic...Vol. 9, No. 2, 2003 Iron and sulfur chemistry in a stratified lake: Evidence for iron-rich sulfide complexesâGeorge...R. Nelson, and A. Riganti 31 Soldiers Cap Group iron-formations, Mt Isa Inlier, Australia, as windows...MINERALOGIST BIOGEOCHEMISTRY Microbial cycling of iron and sulfur in sediments of acidic and pH-neutral...PAPERS IN OTHER JOURNALS Vol. 217, No. 3â4, 2004 Iron stable isotopes: Beyond biosignaturesâA.D. Anbar |
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