 | | Journal (article/letter/editorial) | | formed in the Neoproterozoic Araçuaı́ orogen (SE Brazil) during Western Gondwanaland assembly Eliza Peixoto...formed in the Neoproterozoic Araçuaı́ orogen (SE Brazil) during Western Gondwanaland assembly, Gondwana...formed in the Neoproterozoic Araçuaí orogen (SE T Brazil) during Western Gondwanaland assembly a SC R...Alkmimb,1, I.A. Dussina,1 Universidade Federal de Minas Gerais, CPMTC–IGC, Programa de Pós–Graduação em Geologia...Campus Pampulha, Belo Horizonte, 31270–901, MG, Brazil Universidade Federal de Ouro Preto, DEGEO–EM, Campus |  | | 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 |  | | Journal (issue) | | 3 FEATURE ARTICLES Gem Pegmatites of Minas Gerais, Brazil: The Tourmalines of the Araquai Districts...tourlnaline thon anywhere else in the world-Minos Gerais, Brazil; the other with (I new locality for red tourmaline-Zcrmbia...thousand miles south, to the "Gem Pegmatites of Minas Gerais." THe first in a series (which Cdntinues in...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 |  | | Journal (article/letter/editorial) | | [Laurentian University] at 02:10 27 October 2013 Minas Gerais, Brazil O ne of the most interesting and at times... It is also found in pegmatites and associated quartz veins from which relatively large crystals have...bladed crystals to 15 cm long with staurolite in quartz at Windham, Cumberland County, Maine. Blue-bladed...tabular crystals to 4 cm long occur with biotite in quartz at Ratlum Mountain, Hartford County, and at Washington...attractive 7.3-cm kyanite crystal on quartz from Minas Gerais, Brazil. The Marcus Grossmann specimen was |  | | 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 |  | Peixoto, Eliza, Alkmim, Fernando F., Pedrosa-Soares, Antônio, Lana, Cristiano, Chaves, Alexandre O. (2018) Metamorphic record of collision and collapse in the Ediacaran-Cambrian Araçuaí orogen, SE-Brazil: Insights fromP-Tpseudosections and monazite dating. Journal of Metamorphic Geology, 36 (2) 147-172 doi:10.1111/jmg.12287 | Journal (article/letter/editorial) | | collapse in the Ediacaran-Cambrian Araçuaí orogen, SE-Brazil: Insights from P-T pseudosections and monazite...Chaves2# 1 Departamento de Geologia, Escola de Minas, Universidade Federal de Ouro Preto. Morro do Cruzeiro...35.400.000, Ouro Preto, MG, Brazil 2 Universidade Federal de Minas Gerais, CPMTC-IGC, Campus Pampulha...Pampulha, Belo Horizonte 31.270.901, MG, Brazil * Corresponding author: einpeixoto@gmail.com # Fellow of the...normal-sense Chapada Acauã shear zone (CASZ), and the Salinas synclinorium. Three deformation phases were documented |  | | 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 |  | Amaral, Leandro, Caxito, Fabrício de Andrade, Pedrosa-Soares, Antonio Carlos, Queiroga, Gláucia, Babinski, Marly, Trindade, Ricardo, Lana, Cristiano, Chemale, Farid (2020) The Ribeirão da Folha ophiolite-bearing accretionary wedge (Araçuaí orogen, SE Brazil): New data for Cryogenian plagiogranite and metasedimentary rocks. Precambrian Research, 336. 105522 doi:10.1016/j.precamres.2019.105522 | Journal (article/letter/editorial) | | ophiolite-bearing accretionary wedge (Araçuaí orogen, SE Brazil): New data for Cryogenian plagiogranite and metasedimentary...ophiolite-bearing accretionary wedge (Araçuaí orogen, SE Brazil): New data for Cryogenian plagiogranite and metasedimentary...ophiolite-bearing accretionary wedge (Araçuaí orogen, SE 2 Brazil): New data for Cryogenian plagiogranite and metasedimentary...Chemaled,1 6 7 a Universidade Federal de Minas Gerais, Programa de Pós-Graduação em Geologia, CPMTC-IGC-UFMG...6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil 9 b Instituto de Geociências, Universidade de |  | | Report (chapter) | | Neoproterozoic Macaúbas Group, Araçuaı́ orogen, SE Brazil A. C. PEDROSA-SOARES1*, MARLY BABINSKI2, CARLOS...FRANCISCO VILELA1 1 Universidade Federal de Minas Gerais, Instituto de Geociências-CPMTC, Campus Pampulha...Pampulha, 31270-901 Belo Horizonte, MG, Brazil 2 Universidade de São Paulo, Instituto de Geociências...Cidade Universitária 05508-080 São Paulo, SP, Brazil *Corresponding author (e-mail: pedrosa@pesquisador...eastern margin of the São Francisco craton (SE Brazil). The Macaúbas basin evolved from a late Tonian |  | | Report (chapter) | | Federal de Minas Gerais, IGC-CPMTC, Campus Pampulha, 31270-901 Belo Horizonte, MG, Brazil (e-mail: pedrosa@pesquisador... Campus do Cruzeiro, 35400-000 Ouro Preto, MG, Brazil 3 Royal Museum for Central Africa, 3080 Tervuren...São Paulo, Brazil 5 Serviço Geológico do Brasil-CPRM, 70830-030 Brası́lia, DF, Brazil Abstract:...located to the SE of the São Francisco Craton in Brazil, and to the SW of the Congo Craton in Africa. From...domains located to SE of the São Francisco Craton in Brazil, and to SW of the Congo Craton in Africa (Fig. |  | | Journal (article/letter/editorial) | | Pennsylvania 17363 john@jwkustos.com Figure 1. Smoky quartz gwindel, 12.2 cm, from the Mont Blanc massif, les...reason they are commonly referred to as twisted quartz. The name gwindel is an obscure German word for...but it is lacking in the stouter and far tougher quartz crystal. Figure 4. Schorl crystal, 6.5 cm long...specimen and photo. Of particular interest to me are quartz crystals that are bent. My interest in these came...of elbaite crystals, 7.2 cm across, from Minas Gerais, Brazil, that appear to have been subjected to forces |  | Eeckhout, Sigrid G., Castañeda, Cristiane, Ferreira, Ana Cláudia M., Sabioni, Antônio C.S., de Grave, Eddy, Vasconcelos, Daniela C.L. (2002) Spectroscopic studies of spessartine from Brazilian pegmatites. American Mineralogist, 87 (10) 1297-1306 doi:10.2138/am-2002-1005 | Journal (article/letter/editorial) | | Federal, Brazil 4 Department of Mining and Geology, Federal University of Paraíba, Paraíba, Brazil 5 Department...Physics/ICEB, Federal University of Ouro Preto, Minas Gerais, Brazil 6 Department of Metallurgical and Materials...Engineering, Federal University of Minas Gerais, Minas Gerais, Brazil ABSTRACT Mössbauer spectra (MS)...2001). The Eastern gemological province (NE of Minas Gerais State, Fig. 2) includes two distinct types of...deposits, and a distal unit, which is the Salinas Formation. The Salinas Formation comprises quartzmica schists |  | | Journal (issue) | | Mineral Localities: The Barra de Salinas pegmatites, Minas Gerais, Brazil . . . . . . . . . . . . . . ....Mineral Localities: The Barra de Salinas Pegmatites inas Gerais, Brazil Francisco Müller Bastos Rua Bernardo...Bernardo Guimaraes 1645 Belo Horizonte, Minas Gerais 30000 Brazil Brazilian tourmaline has been famous...Brazilian localities is the district of Barra de Salinas, encompassing a gem-bearing pegmatite swarm that...superb specimens today. LOCATION The Barra de Salinas mines are situated 715 kilometers from Belo Horizonte |  | | Journal (article/letter/editorial) | | right). Elbaite crystals, to 8 cm high, Minas Gerais, Brazil. I love the transparency and limpid colors...Landmann of São Paulo, Brazil. Julio has one of the finest collections in Brazil. 134 ROCKS & MINERALS...2012 Figure 3 (above). Beryl, schorl, albite, and quartz, 10.5 cm across, Dassu, Haramosh Mountains, Skardu...It has great texture and form. Figure 7 (left). Quartz variety amethyst on calcite, 14.6 cm across, Las...and textures. Figure 8 (above). Pyromorphite and quartz, 7 cm across, Roughton Gill mine, Cumbria, England; |  | | 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 |  | | Journal (article/letter/editorial) | | Stewartstown, Pennsylvania 17363 john@jwkustos.com Quartz CORES in Tourmaline Crystals Figure 1. A hollow...7-cm specimen is from the Pederneira mine, Minas Gerais, Brazil. John S. White specimen and photo. M any...the American Mineralogist titled “A Pseudomorphic Quartz-Tourmaline Relationship from Northern Nigeria.”...pegmatite that have cores composed of aggregates of quartz grains. The tourmaline crystals—presumably elbaite...writes (p. 1476), appear to have been replaced by quartz, “the replacement being limited by a zone of differing |  | | Journal (article/letter/editorial) | | Minerais, Universidade Federal de Mato Grosso, Cuiabá, Brazil *Corresponding author, e-mail: rubia@cdp.ufmt.br...Universidade Federal de Ouro Preto, Ouro Preto, Brazil e-mail: hanna@degeo.ufop.br 3 Geochemical Laboratory...Araçuai and western Governador Valadares in Minas Gerais) were analyzed for major, minor and trace elements...trace elements, pegmatite, magmatic differentiation, Brazil. Introduction Muscovite is a common rock-forming...pegmatites, it is the fourth major mineral after quartz, K-feldspar and plagioclase (albite variety). Although |  | | 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) | | at the 2014 Tucson Show. Both are kyanites from Brazil. The larger one is 10.4 cm across and is a Vasconselos...from the Cruzeiro mine, Sao José da Safira, Minas Gerais. The smaller, upright one is 4.2 cm tall and...Distrito de Barra do Salinas, Coronel Murta, Minas Gerais. Both are with quartz. Mark Mauthner took the...describing them beyond the layman’s term of box quartz. Approximately twenty years ago while collecting...now-inaccessible place called the Brasie Corners quartz locality, in St. Lawrence County, New York, I was |  | | Catalog/List | | ‘normal’ habit, often in conjunction with euhedral Quartz crystals. The potential for new discoveries and...sideways as well as up. This form is sometimes seen in Quartz, but very rarely in Tourmaline. The rough exterior...and is accompanied by a partially euhedral Smoky Quartz crystal. The Phenakite, measuring 0.9 inches (2...Starting Bid: $2,500 73013 SPESSARTINE on SMOKY QUARTZ Wushan Spessartine Mine, Tongbei, Yunxiao Co.,...Province, China Here are two typically dark Smoky Quartz prisms of good transparency, penetrating a non-descript |  | | Journal (issue) | | mine, Minas Gérais, Brazil. See 'The location, geology and mineralogy of gem tourmalines in Brazil' on...location, geology and mineralogy of gem tourmalines in Brazil Jacques P. Cassedanne, Dr. Sc. *, and Maurice Roditi...inner parts of the pegmatites, on each side of a quartz core or concentrated in pockets, which are variable...variably perthitized, albite, muscovite and milky quartz with some lepidolite, schorl and locally huge tabular...tourmaline is the 'Eastern pegmatitic province' of Minas Gerais. One general and three detailed maps of specific |  | | 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 |  | | Catalog/List | | Colorado, USA. Flecks of native gold <4mm on milky quartz/grey schistose matrix. R.MI. 77 £12.00 NATIVE GOLD...Dakota, USA. Flecks of native gold <4mm with milky quartz on black schistose matrix. R.MI. ; 9 £1200 NATIVE...Colorado, USA. Flecks of native gold <4mm on milky quartz/grey schistose matrix. R.MI. ' 6 £12 00 NATIVE...Dakota, USA. Flecks of native gold <4mm with milky quartz on black schistose matrix. R.ML : 81 ■ £12.00...Dakota, USA. Flecks of native gold <4mm with milky quartz on black schistose matrix. R.MI. 35' £13 00 VANADINITE |  | | Journal (issue) | | epidote deposits of the Capelinha Region, Minas Gerais, Brazil ......................................315...epidote on matrix, 4.4 cm, from Capelinha, Minas Gerais, Brazil. Gail and Jim Spann collection; Tom Spann...w. FineMineral.com Tourmaline Cruzeiro Mine, Brazil. 19.5 cm Fine Minerals International proudly invites...EPIDOTE DEPOSITS OF THE CAPELINHA REGION, MINAS GERAIS, BRAZIL Andrea Bartorelli1 Carlos Cornejo2 Mario...mid-1960s, the Capelinha region in the State of Minas Gerais, Brazil, has become world-famous for producing beautiful |  | Alkmim, Fernando F., Marshak, Stephen, Pedrosa-Soares, Antônio Carlos, Peres, Guilherme Gravina, Cruz, Simone Cerqueira Pereira, Whittington, Alan (2006) Kinematic evolution of the Araçuaí-West Congo orogen in Brazil and Africa: Nutcracker tectonics during the Neoproterozoic assembly of Gondwana. Precambrian Research, 149 (1) 43-64 doi:10.1016/j.precamres.2006.06.007 | Journal (article/letter/editorial) | | evolution of the Araçuaı́-West Congo orogen in Brazil and Africa: Nutcracker tectonics during the Neoproterozoic...Escola de Minas, Universidade Federal de Ouro Preto 35.400.000 Ouro Preto, Minas Gerais, Brazil b Department...Universidade Federal de Minas Gerais, 31.270.901, Belo Horizonte, Minas Gerais, Brazil d Department of Geological...Atlantic—the Araçuaı́ orogen now underlies eastern Brazil, whereas the West Congo belt fringes central Africa’s...in the Cretaceous, the São Francisco craton of Brazil was connected to the Congo craton of Africa, creating |
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