 | | Report (issue) | | EXCURSION FROM BELO HORIZONTE TO OURO PRETO MINAS GERAIS, BRAZIL REGIONAL STRATIGRAPHY AND TECTONICS OF THE...DAS VELHAS GREENSTONE BELT AND THE PROTEROZOIC MINAS SUPERGROUP AS BACKGROUND FOR GOLD METALLOGENESIS...Geoci&ncias Universidade Federal de Minas Gerais Belo Horizonte, Brazil 2U.S. Geological Survey Denver,...prospect pit at Morro do Cruzeiro, Ouro Preto, Minas Gerais, Brazil. 14 INTRODUCTION This paper is one of...reporting on a workshop held in Belo Horizonte, Brazil, from December 1-10, 1986. The workshop was sponsored |  | | Report (issue) | | Deposits of the Cachoeira do Campo Dom Bosco, and Ouro Branco Quadrangles Minas Gerais, Brazil GEOLOGICAL...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the International Cooperation...Deposits of the Cachoeira do Campo Dom Bosco, and Ouro Branco Quadrangles Minas Gerais, Brazil By ROBERT F...GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER...the Departamento National da Producao Mineral of Brazil under the auspices of the International Cooperation |  | | Journal (article/letter/editorial) | | The EBPP is situated mainly in the State of Minas Gerais, but encompasses also parts of the States of...Universidade Federal de Minas Gerais, Av. AntoÃnio Carlos 6277, 31 000 Belo Horizonte MG, Brazil the context of...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...Province (EBPP) is situated mainly in the State of Minas Gerais but also encompasses the southern part of the |  | | 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,...the Cruzeiro tourmaline and mica mine and the Jacobina amethyst mine. He owns several other mines as well |  | | Journal (article/letter/editorial) | | constraints on late miocene weathering rates in Minas Gerais, Brazil Isabela de Oliveira Carmo a,1, Paulo Marcos...45, and 60 m depths in the Cachoeira Mine weathering profile, Minas Gerais, permit calculating long-term...scale) weathering rate (saprolitization rate) in SE Brazil. Pure well-crystallized cryptomelane grains with...calculate the saprolitization rate for the Cachoeira Mine lithologies and for adjacent weathering profiles...denudation; 40 Ar / 39Ar geochronology; Miocene; SE Brazil 1. Introduction Determining weathering rates is |  | | 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 |  | | 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 (article/letter/editorial) | | granitic rocks of the Quadrilatero Ferrifero, Minas Gerais, Brazil, suggest three ages of intrusion: 2400 m...and also in a region 7 km north of nearest known Minas series metasedimentary rocks (Late Precambrian age);... (2) granitized beds of the Minas series, and (3) granite between Minas beds and the 1350 m.y. granite...the peripheral area of the 1350 m.y. granites and Minas metasedimentarv rocks. have been mapped belong...15-22). The Nova Lima group consists of mica and quartz-mica schists with beds of metamorphosed iron formation |  | | Report (volume) | | the Serra do Navio district, Territory of Amapd, Brazil, by John Van N. Dorr 2d, Charles F. Park, Jr.,...__________________ (C) Mica deposits in Minas Gerais, Brazil, by W. T. Pecora, M. R. Klepper, and D....11. Plan and sections of the lower adits, Quindio mine, municipio of Cajamarca, Tolima, Colombia._____________________In...Map showing principal mica, optical calcite, and quartz crystal mines and prospects, Colombia____________________-_In...pocket 13. Map and sections of the Alumbral quartz crystal mine, municipio of Muzo, Boyacd, "Colombia. ______ |  | | Report (issue) | | the Departmento National da Produ^ao Mineral of Brazil under the auspices of the Agency for International...Ferrifero, Minas Gerais, Brazil By NORMAN HERZ REGIONAL GEOLOGY OF THE QUADRILATERO FERRIFERO, MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL Prepared in cooperation with the Departmento Nacional da Produqao...Produqao Mineral of Brazil under the auspices of the Agency for International Development of the United...Ferrifero, Minas Gerais, Brazil. (Regional geology of the Quadrilatero Ferrifero, Minas Gerais, Brazil) (Geological |  | | Journal (article/letter/editorial) | | BEISPIEL DES PEGMATITDISTRIKTS VON ARA‚UAI (MINAS GERAIS) von G. Morteani & C. Preinfalk Lehrstuhl fŸr...die šstliche Pegmatitprovinz in den Staaten Minas Gerais und SŸdbahia. Sie wurde als solche von PAIVA...K/Ar-Altersbestimmungen an Muskoviten aus den Pegmatiten von Cachoeira und Maxixe im Gebiet von Ara•ua’ ergeben ein Brasiliano...Pegmatite von Barreiro I und II, Xuxa, Maxixe und Cachoeira werden wegen ihres ungewšhnlich hohen Spodumengehaltes...ãDepartamento de Geoci•ncias der Universidade Federal de Minas GeraisÒ in Belo Horizonte hat. Wir danken Herrn |  | | Book | | original: Norte-Americano: “GEOLOGY AND PHYSICAL OF BRAZIL” GEOGRAPHY Esta tradução & propriedade literarta...Provincia do Espírito Santo . ME =»Provincia de Minas Gerais cecesesmereo IV — Ilhas é Resifes do Cocal dos...Santa Catasina o Rio Grande do Sul . XVIII — As minas de ouro do Brasil XIX— Resumo da geologia do Draril...principais rios, percorrendo os distritos de Mucurf c Minas No- 6 Cuartes Freverick HarTr vas; estudo dos...publicação da obra “Geology and Physical Geography of Brazil”, pasa satisfazer ao pedido de Louis Agassiz para |  | | Journal (article/letter/editorial) | | rift model for the sedimentary diamond deposits of Brazil Received: 13 January 1997 / Accepted: 22 July...kimberlites have been discovered in the past 20 years in Brazil, the Brazilian diamond production has been derived...of the recent alluvial deposits of Brazil. In this sense, Brazil shows a sharp contrast with other large-scale...directly or because they feed the alluvials. But Brazil diers from these countries regarding the age of...Proterozoic, in Brazil they spread from the Lower/Middle Proterozoic to the Cretaceous. Brazil is thus a very |  | | 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 (issue) | | Resources of the Pico de Itabirito District Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL Prepared...the Departamento Nacional da Producao Mineral of Brazil under the auspices of the Agency for International...District Minas Gerais, Brazil By ROBERTS M. WALLACE GEOLOGY AND MINERAL RESOURCES OF PARTS OF MINAS GERAIS...GERAIS, BRAZIL GEOLOGICAL SURVEY PROFESSIONAL PAPER 341-F Prepared in cooperation with the Departamento...Departamento Nacional da Producao Mineral of Brazil under the au-spices of the Agency for International Development |  | | 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) | | Alabama 36849 cookrob@auburn.edu Euclase La Marina Mine, Municipio de Pauna Boyacá, Colombia E uclase...as small (generally less than 2-mm) crystals on quartz crystals found in small greisen deposits in the... Euclase crystal group, 11.2 cm tall, La Marina mine, Municipio de Pauna, Boyacá, Colombia. Scott Rudolph...associated with bertrandite, fluorite, muscovite, and quartz. Specific occurrences include the Boomer, Mary...lack modern verification, include the Lost River mine on the Seward Peninsula, Alaska; the Fisher prospect |  | | Journal (article/letter/editorial) | | Preto, Minas Gerais, Brazil DoNAn) R. O•.SEN Abstract Topazdeposition near Ouro Preto,Minas Gerais,Brazil...wasproduced concurrently with andslightlyafter the topaz. Quartz andmuscovite, whicharealwayspresent in thetopaz-bearing...hasreduced the originalhydrothermal suiteto a mixtureof quartz, topaz, sericite, and kaolinite. Introduction...Quadril/tteroFerrifero of Minas perfectly planar, concordant pegmatitesin the same Gerais. Miningwasinitiatedpriorto...and Eschwege,all authorsbased on scantyevidence. quartz,and kaolinite. He thought,on the basisof their |  | | 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 |  | Kesler, Stephen E., Gruber, Paul W., Medina, Pablo A., Keoleian, Gregory A., Everson, Mark P., Wallington, Timothy J. (2012) Global lithium resources: Relative importance of pegmatite, brine and other deposits. Ore Geology Reviews, 48. 55-69 doi:10.1016/j.oregeorev.2012.05.006 | Journal (article/letter/editorial) | | solutions, including the large Jadar (Serbia) and King Valley (USA) deposits, have estimated resources of about...minerals, toward a core that is strongly enriched in quartz (Cameron et al., 1949; Jahns, 1955). The origin...3). A complex intrusion known as the Cherryville quartz monzonite occupies the west side of the pegmatite...average modal composition is 20% spodumene, 32% quartz, 41% feldspar and 6% muscovite, with the remaining...deposit showing their relation to the Cherryville quartz monzonite. Note lack of flattening of steep dips |  | Lana, Cristiano, Alkmim, Fernando F., Armstrong, Richard, Scholz, Ricardo, Romano, Rafael, Nalini, Herminio A. (2013) The ancestry and magmatic evolution of Archaean TTG rocks of the Quadrilátero Ferrífero province, southeast Brazil. Precambrian Research, 231. 157-173 doi:10.1016/j.precamres.2013.03.008 | Journal (article/letter/editorial) | | the Quadrilátero Ferrífero province, southeast Brazil Cristiano Lana a,∗ , Fernando F. Alkmim a , Richard...de Minas, Universidade Federal de Ouro Preto, Morro do Cruzeiro, 35400-000 Ouro Preto, MG, Brazil Research...the southern part of the São Francisco Craton (Brazil). These periods – described here as the Santa Barbara...Palaeoproterozoic metasedimentary sequences of the Minas Supergroup and the Itacolomi Group (Dorr et al....succession of wackes that also became cleaner (more quartz rich) and conglomeratic towards the top. Contact |  | Cabral, A. R., Lehmann, B., Sattler, C. D., Pires, F. R. M., Kaneko, K. (2002) Hg–Tl-bearing manganese oxide from Conta História manganese deposit, Quadrilátero Ferrifero, Minas Gerais, Brazil. Applied Earth Science, 111 (2) 123-127 doi:10.1179/aes.2002.111.2.123 | Journal (article/letter/editorial) | | manganese deposit, Quadrilátero Ferrifero, Minas Gerais, Brazil occur in the Palaeoproterozoic Itabira...Ferrífero, the world-class iron district of Minas Gerais, Brazil, numerous manganese oxide deposits Table...Itabira Iron Formation is the middle unit of the Minas Supergroup, which includes the Caraça Group, the...(dashed lines)37 in Quadrilátero Ferrífero of Minas Gerais basal clastic unit, and the Piracicaba Group...subordinate itabirite and dolomitic phyllite. The Minas Supergroup rests unconformably on the Archaean Rio |  | | 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 (issue) | | SIX APRIL 1993 Cover Picture The Hematita mine in Minas Gérais in 1987 - probably the richest alexandrite...foreground, the soil profile in the centre and the valley confluence in the background. (See 'The location...deposits of alexandrite, cat's-eye and chrysoberyl in Brazil' pp. 333-54) ISSN: 0022-1252 F.G.A. your key...to be able to deterAlthough it is very important mine if if a gem is natural or synthetic, and treated...apatite in spinel and corundum, and biotite in quartz. Conclusion Although the inclusion in spinel focused |  | | 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 |
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