 | Krambrock, K., Guimarães, F. S., Pinheiro, M. V. B., Paniago, R., Righi, A., Persiano, A. I. C., Karfunkel, J., Hoover, D. B. (2013) Purplish-red almandine garnets with alexandrite-like effect: causes of colors and color-enhancing treatments. Physics and Chemistry of Minerals, 40 (7) 555-562 doi:10.1007/s00269-013-0592-6 | Journal (article/letter/editorial) | | 1007/s00269-013-0592-6 ORIGINAL PAPER Purplish-red almandine garnets with alexandrite-like effect: causes of...gem-quality, purplish-red garnets from the Tocantins State, Brazil, were investigated for their crystal chemistry...analysis showed that these garnets are principally almandine– pyrope solid solution at the rim. However, at...Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil e-mail: Klaus@Fisica.UFMG.Br J. Karfunkel Departamento...Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil D. B. Hoover Stone Group Labs, Springfield, MO |  | | Journal (article/letter/editorial) | | Faceting-grade crystals occur in Switzerland, Brazil, and China, but they are extremely rare and tend...crystals to about 6 cm long, with dodecahedral almandine crystals in coarse mica schist, Keivy Mountains...347 Figure 2. A faceted 0.90-carat staurolite, Brazil. Robert J. Lauf specimen No. 4572. Figure 3. Simple...schist, staurolite is typically associated with almandine, muscovite, biotite, kyanite, and quartz. In higher-grade...crystals can be found at Gambo Falls at Gorham where almandine is a common associate. In close competition with |  | | Journal (article/letter/editorial) | | Ultra-high-temperature metamorphism in Central Brazil: the Barro Alto complex R. DE MORAES AND R. A....70910-900 Brazil (e-mail: moraes@unb.br) ABSTRACT The Barro Alto complex, central Brazil, is a layered...980 and 750 °C. Key words: Barro Alto complex, Brazil; orthopyroxene+sillimanite; spinel+quartz; ultra-hightemperature...Geology, Volume 18, Number 4, 2000 In central Brazil, the first occurrence of this kind of mineral assemblage...Neoproterozoic Brası́lia Fold Belt exposed in central Brazil. The main tectonic units in the region are described |  | | Journal (article/letter/editorial) | | Anápolis–Itauçu Complex of the Brası́lia Fold Belt, Brazil R. MORAES1, M. BROWN1∗, R. A. FUCK2, M. A. CAMARGO3...UNIVERSIDADE DE BRASÍLIA, BRASÍLIA, DF, 709110-900, BRAZIL 3 COMPANHIA DE PESQUISA DE RECURSOS MINERAIS...101, SETOR BELA VISTA GOIÂNIA, GO 74823-430, BRAZIL 4 COMPANHIA DE PESQUISA DE RECURSOS MINERAIS (CPRM)...PARTE ‘A’, 1°, ANDAR BRASÍLIA, DF 70830 030, BRAZIL RECEIVED SEPTEMBER 10, 2001; REVISED TYPESCRIPT...(Mouri et al., 1996), the Barro Alto Complex in Brazil (Moraes & Fuck, 2000), and the Saxon and Moldanubian |  | | Journal (article/letter/editorial) | | portion of the Amazon craton, known as the Central Brazil shield (Figs. 1 and 2). To the east, the province...CarajaÂs region being a subprovince of the Central Brazil shield. The other hypothesis holds that the post-Archean...implies a complex collisional history of northern Brazil prior to 1.8 Ga. According to this model, the...of the CarajaÂs gold deposits. Ab Albite; Alm almandine; Ap apatite; Arspy arsenopyrie; Bn bornite; Bt...hastingsite, Fe-biotite and Mn-almandine; and (2) an aluminous-type consisting of almandine, Fe-biotite, grunerite |  | | Journal (article/letter/editorial) | | system south of the São Francisco Craton, southeast Brazil Mario da Costa Campos Neto a, Renaud Caby b, *...Geociências, Universidade de São Paulo, Sao Paulo, Brazil b Laboratoire de Tectonophysique, Université de...Archaean–Paleoproterozoic São Francisco Craton in SE Brazil (Fig. 1) is bounded in its western and southern...3–26 5 Fig. 1. Sketch tectonic map of southeast Brazil. 1998; Simões, 1995; Seer et al., 1998; Alkmin...Pesquisas Geocronológicas, Universidade de São Paulo, Brazil ). The protoliths of these enderbitic granulites |  | | Journal (issue) | | Articles 708 Coloured Stone Mining and Trade in Brazil: A Brief History and Current Status By Aurélien...Collection V. L. Villani photo p. 758 Cover Photo: Brazil is the source of a variety of coloured stones,...spinel (Figure 4b), spessartine (Figure 4c), almandine, quartz, zircon, apatite, topaz, sillimanite,...Junior (BC Gemas do Brasil, Governador Valadares, Brazil), and heating to 500°C in air was successful in...it is likely to have been Rio Grande do Sul in Brazil, well known for its amethyst, agate and jasper |  | | Journal (issue) | | found in the seas off the south-eastern USA to Brazil and N. subnodosus in the seas off western Central...Minas Gerais, Brazil 2. Department of Mining and Geology, Federal University of Paraíba, Brazil Abstract:...found in a wide range of colours. Red pyrope and almandine are probably the most common and most widely used...Laboratory of Great Britain (Shigley et ah, 2000) and Brazil (Ferreira, 1997) have sparked renewed interest...the only garnet variety that does not occur in Brazil (Delaney 1996). Colour-change garnets found in |  | | Journal (article/letter/editorial) | | of the Rondonian/Sunsas Orogenic Belt of western Brazil and Ecuador, and that, if this is true, the Rondonian/Sunsas...extending from the Demerara Rise to the eastern horn of Brazil in South America, and from the Guinea Plateau to...correlative with the Rondonian/Sunsas of western Brazil, which is overlain by Lower Paleozoic sediments...(extending eastward to the Guaxupd Massif (gm) of the Tocantins belt) associated with the Late Precambrian collision...at Guaxupe (or Goias) Massif: basement of the Tocantins Province, including Archean ( 3.9 ( ? ) - > 2 |  | | Journal (article/letter/editorial) | | 1342-937X Gondwana Research Deepest Exposed Crust of Brazil - Geochemistry of Paleoproterozoic Depleted Santa...Bento GonCalves, 9500, 91500-000 Porto Alegre - RS, Brazil, e-mail: afraneo@ifi.$ufrgs.br (Manuscript received...1997) Abstract The deepest crustal processes of Brazil are investigated in the Santa Maria Chico Granulitic...K-granites of the 600 Ma Brasiliano Cycle from southern Brazil. This high-grade rock association is rather comparable...of Scotland. Keywords: Granulites, lower crust, Brazil, geochemistry, geothermobarometry. Introduction |  | | 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 |  | | Book | | MINES AND MINERALS IN BRAZIL --= ··--· ··- ·-·=- MINES AND MINERALS IN BRAZIL J OSIAS LEAO (ECONOMIC...regarding water power and industry of electr·icity in Brazil were specially prepared at the Division of Waters........ 189 SUMMARY OF THE MINERAL RESERVES OF BRAZIL..... . ... ....... . .. 199 STATISTICAL TABLES...practically untouched, the mineral reserves of Brazil have already been a source of wealth to many and...without the discovery of the precious metals in Brazil the existence of the modern economic man would |  | | Journal (article/letter/editorial) | | Gabriel Terrane, Dom Feliciano Belt, southernmost Brazil Luiz Alberto Vedana, Ruy Paulo Philipp & Miguel...Gabriel Terrane, Dom Feliciano Belt, southernmost Brazil, International Geology Review, DOI: 10.1080/00206814...Gabriel Terrane, Dom Feliciano Belt, southernmost Brazil Luiz Alberto Vedanaa, Ruy Paulo Philippa and Miguel...portion of the Dom Feliciano Belt (DFB) in southern Brazil. There are two large geological domains in South...orogenic cycle of the Neoproterozoic geology of Brazil comprising the period from 800 to 500 Ma (Cordani |  | | Book (edition) | | 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...to disclose our vast gemological assets both in Brazil and abroad. Therefore, this publication covers...Gems Specifications 18 Agate 19 Alexandrite 20 Almandine Garnet 21 Amethyst 22 Andalusite 23 Andradite |  | Saraiva dos Santos, Ticiano J., Garcia, Maria da Glória M., Amaral, Wagner Silva, Caby, Renauld, Wernick, Eberhard, Arthaud, Michel H., Dantas, Elton L., Santosh, M. (2009) Relics of eclogite facies assemblages in the Ceará Central Domain, NW Borborema Province, NE Brazil: Implications for the assembly of West Gondwana. Gondwana Research, 15 (3) 454-470 doi:10.1016/j.gr.2009.01.003 | Journal (article/letter/editorial) | | Ceará Central Domain, NW Borborema Province, NE Brazil: Implications for the assembly of West Gondwana...University of Campinas—UNICAMP, 13083-970, Campinas, SP, Brazil IGc-Universidade de São Paulo (USP), Rua do Lago...Lago, 562, CEP 05508-900, São Paulo, SP, Brazil Laboratoire de Tectonophysique, Univ. de Montpellier II...(UNESP), Av 24A, CEP 13506-900, Rio Claro, SP, Brazil e Universidade Federal do Ceará, Dep. de Geologia...Geologia, Campus do Pici, CEP 60455-760 Fortaleza, CE, Brazil f Instituto de Geociências, Universidade de Brasília |  | | Journal (issue) | | shortly after the discovery of major deposits in Brazil. The locally mined diamonds were fashioned in India...product. By the time diamond mining started in Brazil in 1730, production from India had declined to...material has been discovered in only two countries: Brazil (three deposits in Minas Gerais) and Madagascar...been found in the Araçuaí region of Minas Gerais, Brazil. Note the color zoning evident in many of the natural...samples of natural transparent pink quartz from Brazil (see, e.g., figure 2) also were investigated at |  | | Report (issue) | | emerald Rupert Hochleitner Brazil: Minas Gerais, Bahia, Ceara, Goias and Tocantins . . . . . . . . . . . ...quality. It was the gift of Emperor Dom Pedro I of Brazil to the 6 th Duke of Devon- shire. Also housed...some of the most productive emerald localities in Brazil, for example, more than 77 percent of the emerald...important deposits (Madagascar, Mozambique, Zimbabwe, Brazil, etc.). Most schist-type deposits associated with...bonate-Talc Schists (e.g., Santa Terezinha, Goias, Brazil) In this deposit, faults, thrusts and shear zones |  | | Journal (issue) | | L UNUSUAL NEW ALMANDINE GARNETS FROM BRAZIL At our laboratory in Siio Paulo, Brazil, we recently received...pyrope-almandine), and reported that it came from an alluvial deposit in the new state of Tocantins, in...those of pyrope (3.58 to 3.61). At this point, almandine seemed the likely candidate, but a hardness test...parameter of A,, = 11.508, which is less than that of almandine (11.530).Qualitative chemical analysis by energy...garnets, reportedly from the Brazilian state of Tocantins, revealed some unusual gemological characteristics |  | | Journal (issue) | | ........................................... 13 Brazil .................................................Lapidary, Hong Kong; CMP Asia, Hong Kong; GEA, Brazil; Emmanuel Piat, France; Israel Emerald Cutters...DIRECTORS Andrew Cody, Australia Sergio Martins, Brazil Emmanuel Piat, France Constantin Wild, Germany...to improve the color. Some kunzite buyers from Brazil also discovered that rough crystals they purchased... CY CMY K 2006 MINING REPORT C ompared to Brazil, its land-locked neighbor, Bolivia is a small country—it |  | | Journal (article/letter/editorial) | | found in a eugeosynclinalsuite in Minas Gerais, Brazil, and is of the Algoma type. The depositsrange in...surficial rock known as canga, depositsof Minas Gerais,Brazil, the presenceof which is very resistantto further...Althoughsuchrocks are known in the paragneisses of Brazil, no good term has been developedto describethem...factoryterm #neissicitabiritein their fieldwork in Brazil. The nomenclature of iron-formation at the highergradesof...metamorphism must be considered to beunsatisfactory. Brazil Minas Gerais Perhapsthe mostwidelyknowniron-formations |  | | Book | | American Craton 2.7.1 Guiana Shield 2.7.2 Central Brazil Shield 2.8 African Craton: Southern Africa 2.8...Amazonian Craton 3.7.2 Goias Massif, Tocantins Province, Central Brazil Shield 3.7.3 Sao Francisco Craton...Central Brazil Shields (less Tocantins Province) 4.7.2 S5o Francisco Craton 4.7.3 Tocantins Province...Province (Central Brazil Shield) 4.8 African Craton: Southern Africa 4.8.1 Namaqua-Natal Mobile Belt 4.8.2 K...Appalachian Orogen 5.7 South American Craton 5.7.1 Tocantins Province 5.7.2 S5o Francisco Craton 5.7.3 Atlantic |  | | Book | | American Craton 2.7.1 Guiana Shield 2.7.2 Central Brazil Shield 2.8 African Craton: Southern Africa 2.8...Amazonian Craton 3.7.2 Goias Massif, Tocantins Province, Central Brazil Shield 3.7.3 Sao Francisco Craton...Central Brazil Shields (less Tocantins Province) 4.7.2 S5o Francisco Craton 4.7.3 Tocantins Province...Province (Central Brazil Shield) 4.8 African Craton: Southern Africa 4.8.1 Namaqua-Natal Mobile Belt 4.8.2 K...Appalachian Orogen 5.7 South American Craton 5.7.1 Tocantins Province 5.7.2 S5o Francisco Craton 5.7.3 Atlantic |  | Brando Soares, Mariana, Corrêa Neto, Atlas Vasconcelos, Bertolino, Luiz Carlos, Alves, Felipe Emerson André, de Almeida, Antônio Modesto, Montenegro da Silva, Pedro Henrique, Mabub, Ricardo Oliveira de Araújo, Manduca, Luedson Guimarães, Araújo, Ivan Mendes Caixeta de Pamplona (2018) Multistage mineralization at the hypozonal São Sebastião gold deposit, Pitangui greenstone belt, Minas Gerais, Brazil. Ore Geology Reviews, 102. 618-638 doi:10.1016/j.oregeorev.2018.09.028 | Journal (article/letter/editorial) | | Deposit, Pitangui Greenstone Belt, Minas Gerais, Brazil Mariana Brando Soares, Atlas Vasconcelos Corrêa...Deposit, Pitangui Greenstone Belt, Minas Gerais, Brazil, Ore Geology Reviews (2018), doi: https://doi.org/10...Deposit, Pitangui Greenstone Belt, Minas Gerais, Brazil Mariana Brando Soares1, Atlas Vasconcelos Corrêa...Geociências, Universidade Federal do Rio de Janeiro, Brazil. 2 – Departamento de Geologia, Instituto de Geociências...Janeiro, Brazil. 3- Centro de Tecnologia Mineral (CETEM), Rio de Janeiro, Brazil 4 – IAMGOLD, Brazil 5- Centro |  | Pinheiro, M.A.P., Suita, M.T.F., Lesnov, F.P., Tedeschi, M., Silva, L.C., Medvedev, N.S., Korolyuk, V.N., Pinto, C.P., Sergeev, S.A (2019) Timing and petrogenesis of metamafic-ultramafic rocks in the Southern Brasília orogen: Insights for a Rhyacian multi-system suprasubduction zone in the São Francisco paleocontinent (SE-Brazil) Precambrian Research, 321. 328-348 doi:10.1016/j.precamres.2018.12.006 | Journal (article/letter/editorial) | | suprasubduction zone in the São Francisco paleocontinent (SE-Brazil) M.A.P. Pinheiro, M.T.F. Suita, F.P. Lesnov, M...suprasubduction zone in the São Francisco paleocontinent (SE-Brazil), Precambrian Research (2018), doi: https://doi...suprasubduction zone in the São Francisco paleocontinent (SE-Brazil) Pinheiro, M.A.P.,1*, Suita, M.T.F.2, Lesnov, F...Geological Survey of Brazil (CPRM/SGB), Avenida Brasil, 1731 Belo Horizonte, Brazil Geology Department...Ouro Preto (UFOP), Morro do Cruzeiro, Ouro Preto, Brazil Siberian Branch of Russian Academy of Sciences |  | | Journal (issue) | | Tourmalines from New Deposits in Paraíba State, Brazil Type Ia Diamond with Green-Yellow Color Due to...Iron Colorants in Gem Tourmalines Andalusite from Brazil Peridot from Sardinia, Italy Fall 2009 Characterization... The principal species (table 1) are pyrope, almandine, and spessartine (pyralspite garnets), and grossular...defining garnet varieties (pyrope, pyrope-almandine, almandine, almandine-spessar- GEMS & GEMOLOGY WINTER 2011...a End member Symbol Formula RI SG Pyrope Almandine Spessartine Grossular Andradite Uvarovite Goldmanite |
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Rodolita mine, Fazenda Rodolita, Peixe, Tocantins, Brazil