 | | Journal (article/letter/editorial) | | include the lithium aluminosilicates spodumene, petalite, and eucryptite (formulas of minerals in bold...Lepidolite Liddicoatite Lithiophilite Montebrasite Petalite Rossmanite Spodumene Triphylite Zinnwaldite Formula...miarolitic cavity, Telirio mine, Linopolis, Minas Gerais, Brazil. (c) Left: Lithiophilite (7 × 5 × 5 cm)...Volume 92, March/April 2017 149 Figure 4. (a) Petalite, with pollucite and quartz, Tanco mine, Bernic...cleavage on {001} visible in this specimen of petalite (12 × 7 × 4 cm) from Bikita, Zimbabwe, serves |  | | Journal (article/letter/editorial) | | and spessartine. Historic localities are found in Brazil, Madagascar, Russia, and the United States, but...(Simmons 2007). Historically, pegmatite deposits in Brazil, Madagascar, Russia, and the United States have...Acadêmico Hélio Ramos, 54740-530, Recife, Pernambuco, Brazil E-mail: beurlen@ufpe.br E LEMENTS , V OL . 8,...right from the upper left, pink morganite beryl (Brazil, 100.99 ct, 35.96 × 25.69 mm), blue topaz (Zimbabwe...red-violet elbaite tourmaline (Brazil, 16.87 ct), blue aquamarine beryl (Brazil, 17.96 ct), orange spessartine |  | 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) | | minerals, principally spodumene (LiAlSi2O6) and petalite (LiAlSi4O10), are used in ceramic and glass products...widespread but rarely of economic importance, and petalite, eucryptite (LiAlSiO4) and lepidolite (KLi2AlSi4O10F2)...pegmatite and average 26% quartz, 43% feldspar, 22% petalite, 1.9% spodumene, 1.3% amblygonite and 0.7% eucryptite...focused on the Araçuaí and São João del Rei districts of Minas Gerais province, Brazil. Pegmatites in...(Heinrich, 1964; Lagache and Quemeneur, 1997). The Araçuaí district to the north contains more than 300 pegmatite |  | | Journal (article/letter/editorial) | | Minerals Microcline (26 cm across), Araçuaí district, Minas Gerais, Brazil. SPECIMEN AND PHOTO : DAVID L ONDON...approximately 65% feldspar and 25% quartz, spodumene and petalite ores (see Figure 1 of Černý et al. along with...solders, lubricants, greases, rocket propellant Petalite LiAlSi4O10 E LEMENTS 270 A UGUS T 2012 fi...quartz powder is also produced from pegmatites in Brazil, India, Australia, Madagascar, Norway, China, and...communication 2011). SPODUMENE AND PETALITE Spodumene and petalite are the two most important hardrock |  | Ross, N. L., Zhao, J., Slebodnick, C., Spencer, E. C., Chakoumakos, B. C. (2015) Petalite under pressure: Elastic behavior and phase stability. American Mineralogist, 100 (4) 714-721 doi:10.2138/am-2015-5105 | Journal (article/letter/editorial) | | INDICATORS OF MAGMATIC PROCESSES IN VOLCANIC ROCKS Petalite under pressure: Elastic behavior and phase stability†... Abstract The lithium aluminosilicate mineral petalite (LiAlSi4O10) has been studied with high-pressure...single-crystal X-ray diffraction (HP-XRD) up to 5 GPa. Petalite undergoes two fully reversible pressure-induced...of these transforms the low-pressure α-phase of petalite (P2/c) to an intermediate β′-phase that then fully...that although the fundamental features of the petalite structure are retained through this transition |  | De Oliveira, Ester Figueiredo, Castañeda, Cristiane, Eeckhout, Sigrid Griet, Gilmar, Messias Menezes, Kwitko, Rogério Ribeiro, De Grave, Eddy, Botelho, Nilson Francisquini (2002) Infrared and Mössbauer study of Brazilian tourmalines from different geological environments. American Mineralogist, 87 (8) 1154-1163 doi:10.2138/am-2002-8-914 | Journal (article/letter/editorial) | | N. CP 941 CEP 30123-970, Belo Horizonte, Minas Gerais, Brazil 2 Instituto de Geociências, Universidade...3173 CEP 30140-970, Brasília, Distrito Federal, Brazil 3 Department of Subatomic and Radiation Physics...de Ouro Preto, CEP 35400-000 Ouro Preto, Minas Gerais, Brazil 5 Companhia Vale do Rio Doce, CVRD, BR 262-Km...P.O. Box 09 CEP 33010-970, Santa Luzia, Minas Gerais, Brazil ABSTRACT Infrared (IR) spectra in the OH...and hydrothermal deposits in the state of Minas Gerais, Brazil. In the magmatic environment, samples of |  | | Journal (issue) | | SEPTEMBER–OCTOBER 2019 Articles The Golconda District, Minas Gerais, Brazil ..........................................TOURMALINE, 11.9 cm, from the Golconda I mine, Minas Gerais, Brazil Brice Gobin (Mineral Art) and Emanuele Marini...China, South Africa, Namibia, Chile, Peru, Bolivia, Brazil and Mexico. His first exchange of specimens with...September–October, 2019 The Golconda District Minas Gerais, Brazil Carlos Cornejo1 Andrea Bartorelli2 Wendell...important specimen-producing districts in all of Brazil. INTRODUCTION The Golconda Pegmatite Field is a |  | | Journal (article/letter/editorial) | | tourmalines from the Mata Azul pegmatitic field, Central Brazil Simone F. da Silva1,2*, Márcia A. Moura2, Hudson...D. Ardisson3 1 2 3 * Instituto Federal de Minas Gerais, Campus Congonhas, Avenida Michel Pereira de...Souza, 3007, Campinho, 36415-000 Congonhas, Minas Gerais, Brazil; simone.geologia@gmail.com Instituto de...Asa Norte, 70910-900 Brasília, Distrito Federal, Brazil Centro de Desenvolvimento de Tecnologia Nuclear...Mário Wernec, 30161970, Belo Horizonte, Minas Gerais, Brazil Corresponding author This study characterizes |  | | Journal (article/letter/editorial) | | AND SILICATES IN THE SAPUCAIA PEGMATITE, MINAS GERAIS, BRAZIL: GENETIC IMPLICATIONS Maxime BAIJOT and...Eastern Brazilian Pegmatitic Province (EBPP), Minas Gerais, Brazil. Detailed mapping of the pegmatite body...petrography, geochemistry, Sapucaia pegmatite, Minas Gerais, Brazil. Sommaire La pegmatite de Sapucaia se trouve...province pegmatitique brésilienne est (EBPP), Minas Gerais, Brésil. Une cartographie détaillée de la pegmatite...pétrographie, géochimie, pegmatite de Sapucaia, Minas Gerais, Brésil. Introduction One of the most important |  | | Journal (issue) | | the Espirito Santo Pegmatite District, Eastern Brazil.. ......697 by M. L. Chaves, A. Bartorelli & C...sixling twin, 6.3 cm, from ItaguaÇu, Espirito Santo, Brazil. William Larson collection, ex Edward Gübelin,...completed the program at the Federal University of Minas Gerais. He worked in the Magisterium of Extractive...recalled by Wendell Wilson in Mineral Collections of Brazil (Cornejo and Bartorelli, 2020): The second issue...contained a one-page editorial (“Location – Minas Gerais, Brazil”) by editor John White, museum specialist |  | | Journal (article/letter/editorial) | | spodumene, spodumene–quartz intergrowths after petalite (SQUI), daughter mineral, fluid inclusion, laser...1994), or during the isochemical breakdown of petalite to spodumene-plusquartz intergrowths (SQUI). The...involving phases such as albite, eucryptite and petalite, are also possible and generally occur below 300°C...mineralization, of the Araçuaí pegmatite district (Eastern pegmatite province, Minas Gerais, Brazil). Chem. Erde...to 500 K, and the thermodynamic properties of petalite to 1800 K. Am. Mineral. 69, 701-710. JACKSON, |  | Albert, Capucine, Lana, Cristiano, Gerdes, Axel, Schannor, Mathias, Narduzzi, Francesco, Queiroga, Gláucia (2018) Archean magmatic-hydrothermal fluid evolution in the Quadrilátero Ferrífero (SE Brazil) documented by B isotopes (LA MC-ICPMS) in tourmaline. Chemical Geology, 481. 95-109 doi:10.1016/j.chemgeo.2018.02.002 | Journal (article/letter/editorial) | | fluid evolution in the Quadrilátero Ferrífero (SE Brazil) documented by B isotopes (LA MC-ICPMS) in tourmaline...fluid evolution in the Quadrilátero Ferrífero (SE Brazil) documented by B isotopes (LA MCICPMS) in tourmaline...fluid evolution in the Quadrilátero Ferrífero (SE Brazil) documented by B isotopes (LA MC-ICPMS) in tourmaline...Preto, Morro do Cruzeiro, Ouro Preto 35400-000, MG, Brazil Institut für Geowissenschaften, Goethe-Universität...the Archean Quadrilátero Ferrífero district (SE Brazil), tourmaline occurs as a major constituent in a |  | Sánchez-Muñoz, Luis, Müller, Axel, Andrés, Sol López, Martin, Robert F., Modreski, Peter J., de Moura, Odulio J.M. (2017) The P–Fe diagram for K-feldspars: A preliminary approach in the discrimination of pegmatites. Lithos, 272. 116-127 doi:10.1016/j.lithos.2016.10.030 | Journal (article/letter/editorial) | | AC CE P ABSTRACT Governador Valadares, Minas Gerais, Brazil. TE g D a RI Peter J. Modreskif, Odulio...blue tourmaline-rich pegmatites in RI Paraiba (Brazil) and in the Cooper Mountain and Casper Mountain...examples are most of the pegmatites of Minas Gerais in Brazil, formed during the Braziliano TE D Orogeny...fractionation in the Borborema Province, Northeastern Brazil. Mineralium Deposita 43, 207-228. ACCEPTED MANUSCRIPT...Ta-mineralization in the Borborema pegmatite province, NE-Brazil: A PT review. Journal of South American eath |  | | Journal (issue) | | cat's-eyes Treated jadeite bead necklace Emeralds from Brazil Famous diamond Pink conch pearl Color-change sapphire...Maxixe beryl, a material first found in 1917 in Brazil that faded on exposure to sunlight (also see Nassau...synthetic amethyst on the basis of the presence of Brazil-law twinning in the former (figure 16). While this...phantom quartz locality near Buenopolis, Minas Gerais, Brazil. The specimen was obtained from Kevin Lane...the Gemological Center in Belo Horizonte, Minas Gerais, Brazil. The rough from which the two stones were |  | | Journal (article/letter/editorial) | | Cachoeira Group (Romeiro and Pedrosa-Soares 2005), Brazil Lake (Kontak 2006) and Kings Mountain (Swanson...environment. The absence of primary petalite or evidence of petalite breakdown (sqi) indicate oo f Leinster...LCT-suite pegmatite with late-stage sodium enrichment, Brazil Lake, Yarmouth County, Nova Scotia. I. Geological...LCT-suite pegmatite with late-stage sodium enrichment, Brazil Lake, Yarmouth County, Nova Scotia. II. Implications...espodumênio em pegmatitos da Mina da Cachoeira, Araçuaí, Brasil. Geonomos 13, 75-81. Shearer C.K., Papike |  | | Journal (issue) | | inclusion | Tourmaline from the Cruzeiro Mine, Brazil | Natural diamond showing a ‘synthetic’ pattern... Bend, Oregon, USA. The quartz originated from Brazil, and it was polished on all sides except the back...Madagascar, blue halite from New Mexico, lepidolite from Brazil and tinzenite from Italy, as well as orange lizardite...g. Figure 14). Green kyanite is also known from Brazil and Tanzania, and its coloration is due to Fe3+...recently appeared on the market from Araçuaí, Minas Gerais, Brazil, and it is translucent and ‘tough’ enough |  | | Journal (article/letter/editorial) | | long and sharp, with a hexagonal shape. Specimen Araçuaí is an alkali-rich sample; as such, it has a non-stoichiometric...used in Figure 5. Specimens Elba (Prismatic) Araçuaí (Tabular) SiO2 Al2 O3 FeO MnO MgO CaO Na2 O K2...coordination with oxygen atoms (Figure 6b). In specimen Araçuaí, Figure 6c,d display the same representation of...ppm.be (d)simulated The 29 Si spectrum specimen Araçuaí 9.4 blue) T shows a much broad resonance, 29 width...compared to that of specimen centered at ca. −102 Araçuaí ppm and aatline of 3.6 ppm. Thebroad re 29 nance |  | | Book | | Geosciences Institute University of São Paulo São Paulo Brazil Pedro Oyhantçabal Departamento de Geodinámica Interna...recognized similarities in the ‘old granites’ of Brazil and southern Africa. On the other hand, du Toit...‘Brazilian system’ defined by Alcide d’Orbigny in Brazil (Beaumont 1844), arguably corresponding to the...geochronological data of the Precambrian basement of southern Brazil, Uruguay and Argentina were reported by Hart (1966)...and geochemical data of the Nico Pérez Terrane in Brazil and Uruguay in order to constrain its regional |  | | Journal (issue) | | mining in Sri Lanka • Green cat’s-eye spodumene from Brazil • Color-zoned topaz • Variscite from Peru • Corundum...environments (figure 1). Some contemporary sources are Brazil, Uruguay, Zambia, Namibia, Mexico, Russia, Arizona...Origin Bolivia (Anahí) Bolivia (Anahí) Brazil (Marabá) Brazil (Pau d’Arco) France (St. Raphael) Japan...al., 2005). Some natural material from (Marabá) Brazil shows total absorption in the ~3600 to 3000 cm–1...Kitawaki H. (2002) Natural amethyst from Caxarai mine, Brazil, with a spectrum containing an absorption peak |  | | Journal (issue) | | 2004 Tucson report • Yellow cat’s-eye beryl from Brazil • Update on demantoid and cat’s-eye demantoid from...J. Dunn and W. Wight, “Green gem herderite from Brazil,” Journal of Gemmology, Vol. 15, No. 1, 1976, pp...the Gemological Center in Belo Horizonte, Minas Gerais, Brazil. Given the rarity of this material, these...45 × 22.56 × 13.52 mm), reportedly from Minas Gerais, Brazil, is one of six large herderites examined...hydroxyl-herderite in Brazil are the Virgem da Lapa and Golconda mines in Minas Gerais (P. J. Dunn et al |  | | Book (edition) | | m (26 ft) thick at Urubu, near Araçuai, Minas Gerais, Brazil. Fine pink and green gem-quality tourmaline...acid members of the volcanic province in southern Brazil and Uruguay, and the fire opals occurring in small...amethyst from volcanic rocks in Rio Grande do Sul, Brazil. The amethyst crystals are more strongly coloured...Alluvial sands containing diamonds near Sopa, Minas Gerais, Brazil The above discussion has concentrated on...worldwide but some of the most important are in Brazil, where the gem-quality deposits are associated |  | | Journal (article/letter/editorial) | | Burnthill, True Hill). c. 395 Ma LCT-type pegmatite (Brazil Lake), hosted in metasedimentary and metavolcanic...with muscovite and local occurrence of beryl, petalite, spodumene, and columbite in metamorphic belt...evolving margins (Fig. 1). The pegmatite belts of Brazil and eastern Africa and the granite-related Sn and/or...and early Phanerozoic Sn and/or W mineralization (Brazil, Africa, Arabia) related to orogenic belts that...Antarctica and along the West Gondwana Orogen from Brazil and Nigeria to areas beneath the Sahara. (ii) Target |
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Araçuaí, Minas Gerais, Brazil