 | | Journal (article/letter/editorial) | | vein. FIGURE 3. GARGAS MINE, NEAR COKINTO, MINAS GERAIS Wall rock is decomposed Bambui shale. FIGURE...Payne. Fir.uHi-: 5. Juiz MINE, FAZHNDA CAPAO, MINAS GERAIS Pile of well-formed, but milky, crystals from...VOL. 57 JOHNSTON AND BUTLER, PL, 2 FIGURE 1. QUARTZ MASS WITHIN PIPE Note comb structures in pillar...pillar between workmen. iUitE 2. POCKET OF COMB QUARTZ In sandstone at edge of pipe. ALF.GKK MINE, BAIIIA...map of the On^a-Pacti area, Sete Lagdas, Minos Gerais After H. K. Shearer. 617 TYPES OF DEPOSITS |  | | Journal (article/letter/editorial) | | Paulo, Rua do Lago, 562, 05508-080 – São Paulo, SP, Brazil. *e-mail: datencio@usp.br Luiz A.D. Menezes Filho...Esmeralda, 534 – Prado, 30410-080 - Belo Horizonte, MG, Brazil. INTRODUCTION The three currently recognized members...serrabrancaite. Lavra do Criminoso, Água Boa, Minas Gerais Unanalyzed “roscherite” occurs as green spherules...Fazenda Colonião, municipality of Água Boa, Minas Gerais (Dunn et al. 1979). Among collectors the best...waterclear crystals of beryl. Lavra da Ilha, Itinga, Minas Gerais Zanazziite and a triclinic Fe-dominant “roscherite” |  | | Book | | until he managed to reach the land of his dreams, Brazil. A specialist in the field of geology and mineralogy...France acquired his remarkable collection of giant quartz crystals, exhibited in the National Museum of Natural...crystals and the remarkable mineral treasures of Brazil, as well as the incredible adventures and difficulties...CRYSTALS GIANT QUARTZ CRYSTALS UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL Cyan Magenta...Crystals GIANT QUARTZ CRYSTALS UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL SOFIA–MOSCOW |  | | Journal (issue) | | Top right: Topaz, 8.4 cm, from Ouro Preto, Minas Gerais, Brazil. Lower left: Phosphophyllite, 2 cm, from...Andrea Bartorelli: Minerals and Precious Stones of Brazil. Other important references (if any) for individual...da Cabeca mine, Parelhas, Rio Grande do Norte, Brazil. Will Johnson collection (I had to buy many unwanted...Morganite beryl, 7.5 cm, from near Araçuai, Minas Gerais, Brazil. The find predates the discovery of morganite...to get this specimen, a complete floater, for my Brazil collection); Tom Spann photo. Reference: Cassedanne |  | | Book | | 1982 Jules Roger Sauer ” Foreword For years Brazil has been the major producer of colored stones in...metamorphic rocks, the variety of gem deposits in Brazil is almost infinite. In addition to the mineral...assemblage one might expect from pegmatite dikes, Brazil also produces a very significant output of diamonds...written in English, and beautifully illustrated. “Brazil, Paradise of Gemstones’, by Jules Roger Sauer,...Century. The book is a showcase ofthe best from Brazil and it makes a handsome evocation of what is beautiful |  | | Report (volume) | | Deposits in Minas Gerais Brazil GEOLOGICAL SURVEY BULLETIN 964-C Mica Deposits in Minas Gerais Brazil...M. BARBOSA and RESK FRAYHA, DIVISSO DE FOMENTO, BRAZIL GEOLOGIC INVESTIGATIONS IN THE AMERICAN REPUBLICS...da Produgao Mineral, Ministerio da Agricultura, Brazil, under the auspices of the Interdepartmental Committee...__________-___---_____---_-________ Exports of sheet mica from Brazil, 1900-1945-___-__-_______----______ General statement...___________________ Mica-mining industry in Minas Gerais.______________________________ General stat |  | | Report (chapter) | | built heritage of the interior of Brazil: the use of stone in Minas Gerais A. G. COSTA Department of Geology...University of Minas Gerais, Av. Antônio Carlos 6627, 31270 – 901, Belo Horizonte (Minas Gerais), Brazil (e-mail:...costa@uol.com.br) Abstract: The cultural heritage of Brazil built with natural stone is expressive and shows...interior, especially in the current State of Minas Gerais, a large number of historic buildings can be...steatites and schists in historic buildings in Brazil, which is part of a research project in progress |  | | Journal (article/letter/editorial) | | MINERALS collection of local minerals, particularly quartz, pyrite, and galena. In fact, Keith still owns...1967 in the Pioneira mine, Teofilo Otoni, Minas Gerais, Brazil. Downloaded by [Stockholm University Library]...de Salinas mine, Aracuai-Itinga district, Minas Gerais, Brazil. Although the owner did not wish to sell...specializing in colored gemstones. Keith's travels in Brazil in search of gems and crystal specimens have added...gemmy red tour malines from the Jonas mine in Brazil have sold for several hundred thousand dollars |  | | Journal (article/letter/editorial) | | hematite ore at the Quadrilátero Ferrífero, Minas Gerais, Brazil and its possible genetic significance F...magnetite porphyroclasts replacement by hematite. Quartz and other silicate minerals are also substituted...Later, a synmetamorphic metasomatic replacement of quartz by hematite, derived from the iron formation itself...replacement of quartz The important deposits of high-grade, compact hematite of QF, Minas Gerais, Brazil, averaging...Janeiro), Ilha do Fundão, Rio de Janeiro RJ 21949-900, Brazil (frpires@geologia.ufrj.br). Based on a contribution |  | | Journal (article/letter/editorial) | | AGE DETERMINATeION OF QUARTZ PEGMATITES IN VEINS AND BRAZIL. DJALMA GUIMAR•ES. CRITICAL ASPECTS...satisfactoryfigure for the age of the quartz deposits.in the quartz-producingareas of Brazil. They have found that in...as well as someof the depositsin the State of Minas Gerais,occurin Algonkian and Silurian (Bambui Series)...speaking,pegmatitesin later formationsturn into quartz veins, a fact suggestingpost-Bambuiand pre-Devonianage...end of paper. 100 AGE DETERMINATION OF QUARTZ VEINS IN BRAZIL. 101 This distribution appears to indicate |  | | Journal (article/letter/editorial) | | OF THE S•O JO_•O DEL REI DISTRICT, MINAS E. WM. GERAIS, BRAZIL x HEINRICH ABSTRACT Two generationsof...pegmatitesoccurin the S[o Jo•o del Rei district of Minas Gerais, Brazil: 1) a pre-tectonicgroup with accessorycassiterite...pegmatitic magma. INTRODUCTION THE lithium pegmatitesof Brazil are imperfectlyknown geologically,but two main...main areasare recognized:1. The northern Brazil area, in the statesof Rio Grande do Norte, Paraiba and Ceara...beenpublished(5). 2. The SSoJo•o del Rei area of Minas Gerais,in which pegmatiteshave been mined for cassiteriteand |  | | 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 |  | | 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 |  | Cabral, Alexandre Raphael, Tupinambá, Miguel, Zeh, Armin, Lehmann, Bernd, Wiedenbeck, Michael, Brauns, Michael, Kwitko-Ribeiro, Rogerio (2017) Platiniferous gold–tourmaline aggregates in the gold–palladium belt of Minas Gerais, Brazil: implications for regional boron metasomatism. Mineralogy and Petrology, 111 (6) 807-819 doi:10.1007/s00710-017-0496-0 | Journal (article/letter/editorial) | | aggregates in the gold–palladium belt of Minas Gerais, Brazil: implications for regional boron metasomatism...The platiniferous gold–palladium belt of Minas Gerais, Brazil, forms an approximately 240-km-long, roughly...Xavier 524 s. A4016, Rio Janeiro-RJ 20550-050, Brazil 4 Deutsches GeoForschungsZentrum GFZ, Telegrafenberg...Rodovia BR 381, km 450, Santa Luzia-MG 33040-900, Brazil tourmaline aggregates seem to be the ultimate...Metasomatism . PdPt . Gold–palladium belt . Minas Gerais . Brazil Introduction Auriferous lode deposits and |  | de Souza, J. L., Mendes, J. C., da Silveira Bello, R. M., Svisero, D. P., Valarelli, J. V. (1992) Petrographic and microthermometrical studies of emeralds in the ‘Garimpo’ of Capoeirana, Nova Era, Minas Gerais State, Brazil. Mineralium Deposita, 27 (2) 161-168 doi:10.1007/bf00197103 | Journal (article/letter/editorial) | | the 'Garimpo' of Capoeirana, Nova Era, Minas Gerais State, Brazil J.L. de Sonza ~, J. C. Mendes 1, S...Preto, Ouro Preto, Minas Gerais, Brazil 2 IG, Universidade de S~o Paulo, S~o Paulo, Brazil Received: November...the area of the Capoeirana emerald deposit, Minas Gerais State, revealed two main lithostructural units...derived from ultramafic rocks, and quartzites. Quartz and pegmatoid veins appear near the contacts between...the extent of a emeraldiferrous province in Minas Gerais State, which begins at northern Rio Casca and |  | | Journal (article/letter/editorial) | | JanuarylFebruary: Tourmaline on quartz, Cruzeiro mine, Minas Gerais, Brazil. Los Angeles County Museum of...Gonzalo Jara specimen, Jeff Scovil photo. May/June: Quartz (amethyst), near Badger Creek, north of Coaldale...Bunk specimen, Jeff Scovil photo. July/August: Quartz cluster (Herkimer “diamonds’’), Treasure Mountain...Colorado, 337, 382 Actinolite, Bahia, Brazil, 36 Agardite-(Y), Bahia, Brazil, 38 Agate, 259-67 Aikinite, Colorado...Albite. Maine, 4 12 Alexandrite, Hematitia, Minas Gerais, Brazil, 23 Almandine, Maine, 412 Alunite, Utah |  | | Book | | ltatiaia, Conseilheiro Pena, Governador Valadares, Brazil (Roger Titeux collection, France) 4 inches. Above:...collection) 6 inches. Right: Rutile in quartz, lbitiara, Bahia, Brazil (Yves Gillet collection, France) 1...2 inches. Preceding pages: A Tourmaline, Minas Gerais, Brazil (4.2 inches) B Tourmaline, Queen Mine, San...case of rhodochrosite. 10 Amazonstone and smoky quartz, Lake George, Park Co., Colorado (Coil family-...levels of artistry with much harder minerals such as quartz, carnelian, lapis-lazuli, etc. Phenicians, Cretans |  | | Journal (article/letter/editorial) | | Iron-Formations of the Quadrilátero Ferrífero, Minas Gerais, Brazil C. KLEIN† Department of Earth and Planetary...Universidade Federal de Minas Gerais, Belo Horizonte, CEP 31270-901, Brazil Abstract This study presents...different iron-formations in the Early Proterozoic Minas Supergroup of the Quadrilátero Ferrífero. These...it being the best-studied Precambrian region in Brazil. The banded iron-formations, locally known as itabirites...including dolomites, all are part of the Proterozoic Minas Supergroup with a minimum Pb/Pb age determined on |  | | Journal (article/letter/editorial) | | Cuiabá Gold deposit, Quadrilátero Ferrífero, Minas Gerais, Brazil Luiz Cláudio Ribeiro-Rodrigues a,⁎, Claudinei...Caratinga, BR-116, km 526, Caratinga-MG, 35 300-970, Brazil b Instituto de Geociências, Universidade de Brasília...Brasília, Campus Asa Norte, Brasília-DF, 31270-901, Brazil c Institute of Mineralogy and Economic Geology...northern part of the Quadrilátero Ferrífero, Minas Gerais State, Brazil. The region constitutes an Archean granite–greenstone...by the Proterozoic supracrustal sequences of the Minas (<2.6–2.1 Ga) and Espinhaço (1.7 Ga) supergroups |  | | Journal (article/letter/editorial) | | hematite ore in the Quadrilátero Ferrífero of Minas Gerais, Brazil: petrographic evidence from the Gongo Soco...high-grade soft hematite ore from Gongo Soco, Minas Gerais, Brazil, consists of laminae of platy hematite that...interpreted in terms of hydrothermal leaching of quartz and dolomite from precursor itabirite, with goethitic...Coelho Neto 32/apt 704, 22231-110 Rio de Janeiro–RJ, Brazil. Orlando Garcia Rocha Filho (orlando.rocha@cvrd...caixa postal 22, 35970-000 Barão de Cocais–MG, Brazil. Richard David Jones (rocknocker@juno.com) is at |  | 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) | | net Rose (Pink) Quartz Lavra da Pitorra, Laranjeiras, Galiléia Minas Gerais, Brazil T here can be...be multiple reasons for including rose quartz crystals in your collection. One that immediately comes to...remarkable number of specimens “wear” their rose quartz crystals as halos, crowns, overgrowths, sashes...crystals or masses of smoky, milky, or colorless quartz, some exceeding 30 cm in size. This results in...intriguing and decidedly unique. Although the rose quartz crystals themselves scarcely reach 3 cm in size |  | | Journal (article/letter/editorial) | | transparent, faceted gem stones of rose quartz from Brazil, weighing 73.50 carats and 17.50 carats respectively...supplied him. They now enhance the quartz gems. A synthetic quartz crystal of 118.8 grams was received...donated an excellent faceted green gem apatite from Brazil. A beautiful jadeite statuette, about five ROCKS...Murray Hill, New Jersey, presented a large synthetic quartz crystal weighing 467 grams to the synthetic mineral...of pink and blue tourmaline from Tiofilo Otoni, Brazil, with the Bruce fund; and a large morganite from |  | | Journal (issue) | | left) Elbaite, 4.5 cm, Sapo mine, Goiabeira, Minas Gerais, Brazil; Gus Eitler collection; Joe Budd photo....photo. (lower left) Amazonite microcline with smoky quartz, 8.5 cm, Tree Root pocket, Two Point claim, Teller... Kunzite spodumene, 11 cm, Urucum mine, Minas Gerais, Brazil. Ex Steve SmaJe collection. Joe Budd photo...2009 7 RICHARDSON BEARD COLLECTION Pyrite on quartz, 11 cm, Spruce Ridge, King County, Washington....Bruce Oreck collection. Joe Budd photo. Pyrite on quartz and siderite, 8 cm, Simplon Tunnel, near Brig, |  | | 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...granulite facies assemblages. The 5 180 values of 136 quartz-iron oxide pairs have been determined and "temperatures...o n " have been calculated. The 6280 values of quartz vary between + 6 and 20~ except one value near...the quartz are > 12%0, whereas in the E-region only 46% fall in this range. In contrast to quartz the |
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Taquaral, Itinga, Minas Gerais, Brazil