 | Lord, R. A., Prichard, H. M., S.SA, J. H., Neary, C. R. (2004) Chromite Geochemistry and PGE Fractionation in the Campo Formoso Complex and Ipueira-Medrado Sill, Bahia State, Brazil. Economic Geology, 99 (2) 339-363 doi:10.2113/gsecongeo.99.2.339 | Journal (article/letter/editorial) | | Fractionation in the Campo Formoso Complex and Ipueira-Medrado Sill, Bahia State, Brazil R. A. LORD,† Clean...de Geociências, Universidade Federal da Bahia, Salvador, Brazil AND C. R. NEARY Formerly at Natural Environment...textures indicate recrystallization during upper amphibolite or granulite facies metamorphism, now with incomplete...retrograde alteration and serpentinization. In Campo Formoso a deeply eroded stratiform complex contains...orthopyroxene relicts in an upper unit at the Cascabulhos mine. Microprobe studies of chromite-rich specimens from |  | | Journal (article/letter/editorial) | | Economic Geology, v. 108, pp. 1753–1771 The Limoeiro Deposit: Ni-Cu-PGE Sulfide Mineralization Hosted...Conduit in the Borborema Province, Northeastern Brazil Jonas Mota-e-Silva,1,2,† Cesar Fonseca Ferreira...01037-912, Brazil 2 Instituto de Geociências, Universidade de Brasília, Brasília, DF. 70910-900, Brazil Abstract...Abstract The Limoeiro deposit, located in a high-grade mobile belt of the Brasiliano orogenic cycle (650–500...age of the ultramafic intrusion that hosts the Limoeiro deposit is not yet known, but regional geologic |  | | Journal (article/letter/editorial) | | Ipueira-Medrado Sill, São Francisco Craton, Bahia State, Brazil JULIANA CHARÃO MARQUES† Instituto de Geociências...Caixa Postal 15001, CEP 91501-970, Porto Alegre-RS, Brazil AND CESAR FONSECA FERREIRA FILHO Instituto de...Universitário, Asa Norte, Brasília-DF, CEP 70910-900, Brazil Abstract The Ipueira-Medrado mafic-ultramafic...mafic-ultramafic sill hosts the largest chromite deposit in Brazil. The sill is a 7-kmlong and 300-m-thick elongated...melanorites that are partially metamorphosed under amphibolite facies conditions. The variation of olivine and |  | Mota-e-Silva, J., Prichard, H. M., Filho, C. F. Ferreira, Fisher, P. C., McDonald, I. (2015) Platinum-group minerals in the Limoeiro Ni–Cu–(PGE) sulfide deposit, Brazil: the effect of magmatic and upper amphibolite to granulite metamorphic processes on PGM formation. Mineralium Deposita, 50 (8) 1007-1029 doi:10.1007/s00126-015-0585-0 | Journal (article/letter/editorial) | | in the Limoeiro Ni–Cu–(PGE) sulfide deposit, Brazil: the effect of magmatic and upper amphibolite to granulite...Springer-Verlag Berlin Heidelberg 2015 Abstract The Limoeiro Ni–Cu–(platinum-group elements (PGE)) deposit...igneous tubular conduit system in northeastern Brazil. Representative ores from the deposit have been...13212-161, Brazil 2 Instituto de Geociências, Universidade de Brasilia, Brasília, DF 70900-970, Brazil 3 ...the Limoeiro magma conduit. Keywords Platinum-group-minerals . Merenskyite . Upper amphibolite to granulite |  | | Journal (article/letter/editorial) | | the Northern Edge of the São Francisco Craton, Brazil Vitor Bandeira Martins Matos* and Cesar Fonseca...Brasília, Brasília, Distrito Federal 70910-900, Brazil Abstract The Caboclo dos Mangueiros deposit, the...recent discovery of Ni-Cu sulfide mineralization in Brazil, has estimated resources of 200 million tonnes...window for exploration for Ni-Cu-PGE sulfides in Brazil. Introduction Ni-Cu-platinum group element (PGE)...Caraíba, S/N, Distrito Pilar, Jaguarari, Bahia 48967-000, Brazil. ISSN 0361-0128; doi: 10.5382/econgeo |  | | Journal (article/letter/editorial) | | Magmatism in the Northern Borborema Province, Northeast Brazil: Tectonic Setting and Potential for Deposits Alanielson...Brasília, 70910-900 Brasília, Distrito Federal, Brazil ABSTRACT Mafic-ultramafic intrusions form a 32-km-long...Piranhas terrane in the Borborema Province, Northeast Brazil. The mafic-ultramafic intrusions consist of wehrlite...orthogneiss and migmatites associated with minor amphibolite and supracrustal rocks. Primary magmatic features...Aguablanca deposit in Spain (Tornos et al. 2001). In Brazil, the potential for exploration in orogenic belts |  | | Journal (article/letter/editorial) | | Gerais, but encompasses also parts of the States of Bahia, EspõÂ rito Santo and Rio de Janeiro. The EBPP is...AntoÃnio Carlos 6277, 31 000 Belo Horizonte MG, Brazil the context of emerald mineralization, but seem...Argentina, (2) the north-eastern or Borborema in Brazil, and (3) the Eastern Brazilian. A description of...pegmatites of the north-eastern Pegmatite Province of Brazil and their geochemistry have been studied by Beurlen...also encompasses the southern part of the State of Bahia, the western margin of the State of EspõÂ rito Santo |  | Mota-E-Silva, Jonas, Prichard, Hazel M., Suárez, Saioa, Ferreira Filho, Cesar F., Fisher, Peter C. (2016) Supergene Alteration of Platinum-Group Minerals and the Formation of Pd-Cu-O and Pd-I-O Compounds In the Limoeiro Ni-Cu-(PGE) Deposit, Brazil. The Canadian Mineralogist, 54 (3) 755-778 doi:10.3749/canmin.1500049 | Journal (article/letter/editorial) | | Pd-Cu-O AND Pd-I-O COMPOUNDS IN THE LIMOEIRO Ni-Cu-(PGE) DEPOSIT, BRAZIL JONAS MOTA-E-SILVA Votorantim Metais...05423-180, Brazil University of Brasilia, Geosciences Institute, Brası́lia/DF, 70900-970, Brazil HAZEL M...Geosciences Institute, Brası́lia/DF, 70900-970, Brazil PETER C. FISHER School of Earth and Ocean Science...weathering of platinum-group minerals (PGM) in the Limoeiro nickel-copper and platinum-group element [Ni-Cu-(PGE)]...over the base metal sulfide-rich parts of the Limoeiro primary ore. The mobility of Pt is very dependent |  | | Journal (article/letter/editorial) | | Chromite Deposit of the Ipueira±Medrado Sill, Bahia, Brazil J. C. MARQUES1 *, C. F. FERREIRA FILHO2 , R...BENTO GONCËALVES 9500, PORTO ALEGRE-RS, 91509-900, BRAZIL 2 INSTITUTO DE GEOCIEÃNCIAS, UNIVERSIDADE DE BRASIÂLIA-UNB...UNIVERSITAÂRIO, ASA NORTE, BRASIÂLIA-DF, 70910-900, BRAZIL 3 DEPARTMENT OF TERRESTRIAL MAGNETISM, CARNEGIE...Marcelo Gama 1038/ 404, Porto Alegre-RS, 90540-041, Brazil. Telephone: 55-51-30295030. Fax: 55-51-3221-3298...Great Dyke, Zimbabwe (Wilson, 1982), and Bacuri, Brazil (Spier & Ferreira Filho, 2001) intrusions. Recent |  | Ganade, Carlos E., Basei, Miguel A.S., Grandjean, Felipe C., Armstrong, Richard, Brito, Reinaldo S. (2017) Contrasting Archaean (2.85–2.68 Ga) TTGs from the Tróia Massif (NE-Brazil) and their geodynamic implications for flat to steep subduction transition. Precambrian Research, 297. 1-18 doi:10.1016/j.precamres.2017.05.007 | Journal (article/letter/editorial) | | Archaean (2.85-2.68 Ga) TTGs from the Tróia Massif (NE-Brazil) and their geodynamic implications for flat to...Archaean (2.85-2.68 Ga) TTGs from the Tróia Massif (NE-Brazil) and their geodynamic implications for flat to...Archaean (2.85-2.68 Ga) TTGs from the Tróia Massif (NE-Brazil) and their geodynamic implications for flat to...Geological Survey of Brazil, Rio de Janeiro-RJ, Brazil University of São Paulo, São Paulo, Brazil (3) Geological...Geological Survey of Brazil, Fortaleza, Brazil (4) Australian National University-ANU, Canberra, Australia (5) |  | | Book | | born hills appear parallel to Mahagiri range due to mine-waste dumping. Unpaved roads serve the movement...The sky is gloomy throughout the day due to the mine and road dust. Social evils, crime, alcoholism,...education, counseling, and training. Making stringent mine-safety rules is not the solution—it has to be implemented...Ore Group Orissa Mining Corporation Limited Run of Mine Reconnaissance Permit tonnes tonnes per annum/day...significant in Canada, United States, Australia, Africa, Brazil, New Caledonia, Philippines, Indonesia, and the |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...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...Landmann. CDD-549 Indexes for systematic catalog: 1. Brazil: Minerals and precious stones: Mineralogy and gemology |  | | Journal (issue) | | York circulation manager Articles The Boltsbum mine, Weardale, County Duiham, England ................ Bariand Arsenate minerals of the Sterling Hill mine: an overview .....................................from the Virgem da Lapa district, Minas Gerais, Brazil. Sorbonne collec tion, photo by Nelly and Pierre...The Mineralogical Record Jan uary-February, 1982 mine Weardale, CpuntyJ)urham, England t h e B o l...1800’s, fine specimens have issuedfrom the Boltsburn mine and are still occasionally available today. W |  | | Journal (issue) | | FEATURE ARTICLES Gem Pegmatites of Minas Gerais, Brazil: The Tourmalines of the Araquai Districts Keit-h...tourlnaline thon anywhere else in the world-Minos Gerais, Brazil; the other with (I new locality for red tourmaline-Zcrmbia...bicolored tounnaline (12.90 ct), all from the Himalaya mine (California). Thestones were faceted by PalaInteri~ntional...his extensive travels in the mining regions of Brazil. Mr. Proctor received an M.S. in molecular biology...graduate gemologist. GEM PEGMATITES OF MINAS GERAIS, BRAZIL: THE TOURMALINES OF THE ARACUAI DISTRICTS By Keith |  | Barnes, Stephen J., Mole, David R., Hornsey, Richard, Schoneveld, Louise E. (2019) Nickel-Copper Sulfide Mineralization in the Ntaka Hill Ultramafic Complex, Nachingwea Region, Tanzania. Economic Geology, 114 (6) 1135-1158 doi:10.5382/econgeo.4677 | Journal (article/letter/editorial) | | (Finland) as an intermediate stage and Mirabela (Brazil) as the layered intrusion end member. Introduction...Maier et al., 2011), Mirabela, Brazil (Barnes et al., 2011c), Limoeiro, Brazil (Mota-e-Silva et al., 2011)...Sleeping Giant Metasediments Biot-Hb Gneiss +amphibolite Ultramafic rock Gabbro Limestone Nachngwea ...fabric. The majority of gneisses record upper amphibolite to lower granulite facies metamorphism with local...conduit intrusions emplaced into the 1137 amphibolite to granulite facies gneisses of the Ntaka terrane |  | Kuchenbecker, Matheus, Pedrosa-Soares, Antônio Carlos, Babinski, Marly, Fanning, Mark (2015) Detrital zircon age patterns and provenance assessment for pre-glacial to post-glacial successions of the Neoproterozoic Macaúbas Group, Araçuaí orogen, Brazil. Precambrian Research, 266. 12-26 doi:10.1016/j.precamres.2015.04.016 | Journal (article/letter/editorial) | | Neoproterozoic Macaúbas Group, Araçuaı́ orogen, Brazil Author: Matheus Kuchenbecker Antônio Carlos Pedrosa-Soares...Neoproterozoic Macaúbas Group, Araçuaí orogen, Brazil, Precambrian Research (2015), http://dx.doi.org/10...Neoproterozoic Macaúbas Group, Araçuaí orogen, Brazil Matheus Kuchenbecker¹,²,*, Antônio Carlos Pedrosa-Soares¹...Carlos 6627, CEP 31270-901, Belo Horizonte, MG, Brazil. Telephone/Fax: +55 31 3409-4441, E-mails: mk.geologia@gmail...Alto da Jacuba, CEP 39100-000, Diamantina, MG, Brazil. M ³Centro de Pesquisas Geocronológicas, Instituto |  | | Journal (article/letter/editorial) | | for the PGE-mineralized magmatism in Carajás, Brazil Eduardo Teixeira Mansur, Cesar Fonseca Ferreira...for the PGE-mineralized magmatism in Carajás, Brazil, LITHOS (2016), doi:10.1016/j.lithos.2016.09.036...constraints for the PGE-mineralized magmatism in Carajás, Brazil SC R IP Authors: Eduardo Teixeira Mansur¹ and...Universidade de Brasília, Brasília-DF, 70910-900, Brazil. email: etmansur@gmail.com 2 Instituto de Geociências...Universidade de Brasília, Brasília-DF, 70910-900, Brazil. email: cesarf@unb.br AC CE P TE D Corresponding |  | | Journal (issue) | | Jan/Feb 2024 Vol.99, No.1 ROCKS MINE ."Iii[! iil"J www.tandfonline.com/vram Pegmatite Minerals & Gems...Pegmatites, Limoeiro Mine, Virgem da Lapa, Ara~uaf Pegmatite District, . Minas Gerais, Brazil, Michael A...Elbaite from the Cruzeiro Pegmatite, Minas Gerais, Brazil: At the Natural History Museum of Los Angeles County...microc/ine, 72.5 cm, Limoeiro mine, Virgem da Lapa, Ara<;uar district, Minas Gerais, Brazil; private collection...x 14.2 cm, Minas Gerais, Brazil; B: Topaz, 8 x 10.5 cm, Minas Gerais, Brazil; C: Aquamarine, 6.5 x 14 |  | | Journal (issue) | | Mineral., 10, 812-21. Game, P. M. (1954) Zoisite-amphibolite with corundum from Tanganyika. Min. Mag., 30...et al. was said to have originated in the Wessel mine near Hotazel by Karuman, N. Cape Province, S. Africa...much from Sri Lanka, Australia and Colombia and Brazil, but what impressed me most was the extent of the...Tourmaline mine (yellow-green, rose-red, yellow and colourless tourmaline), the Otjimbingwe mine (red and...the Kubas mine (fine quality yellowish-green, red and rose-colour), the Albrechtshohe mine (emerald-green) |  | | Journal (article/letter/editorial) | | deposits at the periphery of the Zijinshan copper-gold mine, southeastern China—Bimin Zhang, Xueqiu Wang, Rong...the Qilinchang Zn-Pb-(Ag-Ge) deposit in the Huize mine district, northeastern Yunnan, China—Run-Sheng Han...magmatic suite in the Carajás mineral province, Brazil—Antonio Sales Teixeira, Cesar Fonseca Ferreira...in the Limoeiro Ni-Cu-(PGE) sulfide deposit, Brazil: The effect of magmatic and upper amphibolite to granulite...(including empirical PdCuBiSe3) from the former Roter Bär mine, St. Andreasberg, Harz Mountains, Germany: A result |  | Le Vaillant, Margaux, Barnes, Stephen J., Mole, David R., Fiorentini, Marco L., Laflamme, Crystal, Denyszyn, Steven W., Austin, James, Patterson, Ben, Godel, Belinda, Hicks, John, Mao, Ya-Jing, Neaud, Antoine (2020) Multidisciplinary study of a complex magmatic system: The Savannah Ni-Cu-Co Camp, Western Australia. Ore Geology Reviews, 117. 103292 doi:10.1016/j.oregeorev.2019.103292 | Journal (article/letter/editorial) | | Australia (Maier et al., 2016), Mirabela and Limoeiro in Brazil (Barnes et al., 52 2011; Mota-e-Silva et...interlayered metasedimentary rocks at upper 113 amphibolite to granulite facies. Mole et al. (2018) suggest...Intrusion until 2008 when the 122 Sally Malay Ni-Cu-Co mine was re-named Savannah. Here, we refer to the current...176 to the north and north-west of the Savannah mine as a 1.25 km2 body of interlayered norite, 177...40-50 degree dip toward the NW. Within the Savannah mine area (Figure 273 2B,C,D), the TCG mostly passes |  | | Journal (article/letter/editorial) | | from several pegmatite locations in Minas Gerais, Brazil, acquires its color in conjunction with the substitution...The specimen is from the Swamp dike, Little Three mine, Ramona, California. Figure 5 (below). A cross section...portion of a pegmatite dike from the Little Three mine, Ramona, California, shows graphic granite as an...specimen of microcline from Araçuaí, Minas Gerais, Brazil. The bluish tinge results from a small component...microcline is clear and colorless; from the White Queen mine, Pala district, San Diego County, California. (b) |  | | Journal (issue) | | from Brazil shows chatoyancy caused by flat hollow channels. Four-rayed star aquamarine from Brazil has...the c-axis. A tourmaline-quartz combination from Brazil has an iridescent chatoyancy Grey orthoclase moonstone...cat's-eye from Brazil A very unusual example of a cat's-eye was purchased in Brazil by the author in...measuring Figure 1: Chatoyant pale blue topaz from Brazil weighing 152.15 ct. Photo by J. Hyrsl. 32.94 x...described two topaz cat'seyes, one blue of 7.98 ct from Brazil and another colourless of 12.20 ct from Sri Lanka |  | | Journal (issue) | | recrystallized into uppergreenschist facies to lower amphibolite fades 'greenstones'. Current rock-types of the...NE of the Sandawana mine, along the Mweza Range, which is named 'Machingwe' mine, after a nearby stream...The Machingwe Emerald mine The car journey from Masvingo to the Mashingwe mine takes about 3l/z hours...granitic rocks with thorny bushes and little grass. Amphibolite schists are the predominant rocktype on the Machingwe...for the mine became 'Machingwe Syndicate No. No.22 Mine', but is better known under the name Mine: Machingwe |  | | Book | | necessários investimentos em educação, pesquisas de campo e tecnologias cada vez mais especializadas. Acreditamos...seguintes finalidades para um programa de estudos nesse campo da ciência: • permitir um melhor conhecimento da...geocientistas têm obtido enormes avanços nesse campo da ciência, talvez não estejam ainda suficientemente...propiciadas por muitos colegas em visitas e trabalhos de campo realizados em diversas regiões do país ao longo...em algum interesse particular de um determinado campo científico especializado. É comum a todas as definições |
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