 | | 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...nt spodumene. The weathered partsof the dikesare beingwashedfor Sn and Ta minerals. The spodumene-free...spodumene-free types are unzoned. The spodumene-bearing typesshow 1) rudimentaryzoning or 2) nonzonal units of contrasting...pegmatitic magma. INTRODUCTION THE lithium pegmatitesof Brazil are imperfectlyknown geologically,but two main |  | | Journal (article/letter/editorial) | | DETERMINATeION OF QUARTZ PEGMATITES IN VEINS AND BRAZIL. DJALMA GUIMAR•ES. CRITICAL ASPECTS OF AGE...quartz deposits.in the quartz-producingareas of Brazil. They have found that in the northeasternand m...as well as someof the depositsin the State of Minas Gerais,occurin Algonkian and Silurian (Bambui Series)...paper. 100 AGE DETERMINATION OF QUARTZ VEINS IN BRAZIL. 101 This distribution appears to indicate a...the less deeply buried quartz veins of Central Minas Gerais, Bahia and Southern Goyaz, which occur in upper |  | 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 |  | Andrade, M. B., Atencio, D., Persiano, A. I. C., Ellena, J. (2013) Fluorcalciomicrolite, (Ca,Na,☐)2Ta2O6F, a new microlite-group mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. Mineralogical Magazine, 77 (7) 2989-2996 doi:10.1180/minmag.2013.077.7.08 | Journal (article/letter/editorial) | | mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil M. B. ANDRADE1, D. ATENCIO2,*, A. I. C....São Paulo, SP, Brazil Departamento de Fı́sica, Universidade Federal de Minas Gerais, Av. Presidente...Antonio Carlos, 6627, 30123-970, Belo Horizonte, MG, Brazil Departamento de Fı́sica e Informática, Instituto...Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil [Received 29 May 2013; Accepted 8 September 2013;...in the Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. Associated minerals include: microcline |  | | Journal (article/letter/editorial) | | transparent, faceted gem stones of rose quartz from Brazil, weighing 73.50 carats and 17.50 carats respectively...donated an excellent faceted green gem apatite from Brazil. A beautiful jadeite statuette, about five ROCKS...of pink and blue tourmaline from Tiofilo Otoni, Brazil, with the Bruce fund; and a large morganite from...The gift of a large rhodochrosite stalactite from Minas Capillitas, Catamarca, Argentina, was received from...apophyllite and stilbite crystals from Rio Grande do Sul, Brazil, now exhibited at the far end of the Morgan Hall |  | | Journal (article/letter/editorial) | | The EBPP is situated mainly in the State of Minas Gerais, but encompasses also parts of the States of... aquamarine, morganite, and contain abundant spodumene, tantalite and columbite. In contrast, the Espera...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 |  | | Journal (article/letter/editorial) | | Figure 1b (above left). This is the 16.6 × 10.6-cm spodumene (kunzite) crystal that George F. Kunz is seen...Figure 1c (above center). Gouache painting of the spodumene (kunzite) crystal that is pictured in Kunz (1905)...Mauthner photo of original. Figure 1d (above right). Spodumene (kunzite), Pala Chief mine, Pala district, San...is not simply the discovery of red-blue-hued spodumene, but the unearthing of such a quantity and quality...occurrences of reddish to pink to amethystine spodumene and synthesizes much of the information available |  | | 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 |  | Andrade, M. B., Atencio, D., Chukanov, N. V., Ellena, J. (2013) Hydrokenomicrolite, (☐,H2O)2Ta2(O,OH)6(H2O), a new microlite-group mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. American Mineralogist, 98 (2) 292-296 doi:10.2138/am.2013.4186 | Journal (article/letter/editorial) | | mineral from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil Marcelo B. Andrade,1,* Daniel Atencio,2...Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil 2 Departamento de Mineralogia e Geotectônica, Instituto...Paulo, Rua do Lago 562, 05508-080 São Paulo, SP, Brazil 3 Institute of Problems of Chemical Physics, Russian...in the Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. Associated minerals are: microcline, albite...albite, quartz, muscovite, spodumene, “lepidolite”, cassiterite, tantalite-(Mn), monazite-(Ce), fluorite |  | | Book | | ltatiaia, Conseilheiro Pena, Governador Valadares, Brazil (Roger Titeux collection, France) 4 inches. Above:...inches. Right: Rutile in quartz, lbitiara, Bahia, Brazil (Yves Gillet collection, France) 1.2 inches. Preceding...Preceding pages: A Tourmaline, Minas Gerais, Brazil (4.2 inches) B Tourmaline, Queen Mine, San Diego County...order to extract the gems. Such was the case in Brazil with diamonds; it is still used in the deposits... as in the case of the amethysts of Uruguay or Brazil. Unlike the precious and semi-precious stones, |  | | 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 |  | Pecora, W. T., Switzer, George, Barbosa, A. L., Meyers, and A. T. (1950) Structure and mineralogy of the Golconda pegmatite, Minas Gerais, Brazil. American Mineralogist, 35 (9-10) 889-901 | Journal (article/letter/editorial) | | AND MINERALOGY OF THE GOLCONDA PEGMATITE, MINAS GERAIS, BRAZIL* W. T. PBcona,lGponcoSwrrznn,2 A. L. B.qnnose...granite pegmatite at the Golconda mine in Minas Gerais, Brazil, is a zoned, sheetlike mass in schist. Most...pegmatite mine, one of the oldest mica producers in Brazil, was examined and mapped in detail in 1943-45 by...increasing mica production and mica reserves in Brazil during World War II. The mineral collections made...Figueira)-a well-known mica center in eastern Minas Gerais that has rail, road, and airplane routes to |  | | Book | | until he managed to reach the land of his dreams, Brazil. A specialist in the field of geology and mineralogy...crystals and the remarkable mineral treasures of Brazil, as well as the incredible adventures and difficulties...UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL Cyan Magenta Yellow Black 1 Delev Ilia Deleff...UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL SOFIA–MOSCOW 2004 3 Cyan Magenta Yellow Black...MINERAL TREASURES OF BRAZIL 76 85 AN OUTLINE OF THE MINERAL RESOURCES OF BRAZIL ORIGIN OF GIANT CRYSTALS |  | | Journal (article/letter/editorial) | | COOK Department of Geology Auburn Universit Spodumene var. Kunzite Downloaded by [Selcuk Universitesi]...and William E. Hidden, respectively. Although spodumene is of very widespread distribution, the gem varieties...or more good examples of this unique material. Spodumene in its commonest form is a rather drab opaque...and a calculated density of 3.184. The color of spodumene can vary from emerald-green through yellow to...refractive indices that vary from 1.648 to 1.679. Spodumene exhibits a white streak and is typically DI: |  | | Journal (issue) | | left) Elbaite, 4.5 cm, Sapo mine, Goiabeira, Minas Gerais, Brazil; Gus Eitler collection; Joe Budd photo....Ex Steve Smale Kunzite spodumene, 11 cm, Urucum mine, Minas Gerais, Brazil. Ex Steve SmaJe collection...albite, 12 cm, Telirio mine near Linopolis, Minas Gerais, Brazil. Joe Budd photo. Gold, 8 cm, St. Johns,...cm, Pederneira mine, Sao Jose da Safira, Minas Gerais, Brazil. Joe Budd photo. Pyromorphite, 12 cm, Daoping...mine, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil. Joe Budd photo. 12 Supplement to The |  | | Report (issue) | | REPORT Brazil Investigations (IR)BR-76 NIOBIUM (COLUMBIUM) AND TANTALUM RESOURCES OF BRAZIL U. S. Geological... NIOBIUM (COLUMBIUM) AND TANTALUM RESOURCES OF BRAZIL By Max G. White U.S. Geological Survey CONTENTS...Distribution of alkalic intrusives in Southern Brazil .. 16 Alkalic intrusions in the western side of...geologic setting of deposits .............. 24 Minas Gerais ...................................... 24 Bahia................................. 25 Northeastern Brazil ............................... 25 Territory of |  | | Journal (article/letter/editorial) | | origin—such as the well-known 12.7-meter-long (42-foot) spodumene from the Etta mine in the Black Hills of South...noted for quite large schorl in addition to huge spodumene, beryl, and feldspar crystals (Roberts and Rapp...in the entrance to the Agua Santa mine, Minas Gerais, Brazil. Photo courtesy of Milan Novak. duced similar...Sage, Riverside County, California. Worldwide, Brazil has certainly produced some exceptionally large...were once well exposed in the Ipe pegmatite, Minas Gerais, and recently multimeter sprays of schorl from |  | | Journal (issue) | | and Anthony R. Kampf Gem Pegmatites of Minas Gerais, Brazil: Exploration, Occurrence, and Aquamarine...the northeastern section of the state of Minas Gemis, Brazil. The history of gem exploration and m i n...Te6filo Otoni-Marambaia pegmatite district of Minas Gerais. As is common with most aquamarines, the stones...gem pegmatite regions of the 20th century: Minas Gerais, Brazil. With these articles, we hope to take you...what pegmatite gems have meant historically in Brazil and the production of one very important pegmatite |  | | Journal (issue) | | Virgem da Lapa, Ara~uaf Pegmatite District, . Minas Gerais, Brazil, Michael A. Menzies Signature Specimen:...Specimen: Elbaite from the Cruzeiro Pegmatite, Minas Gerais, Brazil: At the Natural History Museum of Los Angeles...mine, Virgem da Lapa, Ara<;uar district, Minas Gerais, Brazil; private collection, Jeff Scovil photo....Heliodor, 5.5 x 14.2 cm, Minas Gerais, Brazil; B: Topaz, 8 x 10.5 cm, Minas Gerais, Brazil; C: Aquamarine, 6...6.5 x 14.1 cm, Pioneer mine, Minas Gerais, Brazil; D: Elbaite, 8.9 cm high, Himalaya mine, Mesa Grande |  | | Journal (article/letter/editorial) | | Spectroscopic Properties of Manganese Ions in Spodumene Crystals 3 and Antoni Winiarski 3 ˛ Maria Czaja...color change of the pink and colorless LiAlSi2 O6 spodumene crystal due to irradiation and heating is explained...Mn3+ occupy the M2 (not the M1) crystal site. Spodumene crystals which are primary pink (kunzite) contain...for the latter, it is 591 nm. Keywords: pink spodumene; manganese; irradiation effect; optical absorption;...absorption; luminescence 1. Introduction Spodumene (LiAlSi2 O6 ) is a member of the clinopyroxene group which |  | | Journal (issue) | | cm, from near Galileia, Rio Doce Valley, Minas Gerais, Brazil. Roberto Appiani photo. IIEMATITE with... from the Santa Rosa mine, Doce Valley, Minas Gerais, Brazil. Jeff Scovil photo. Supplement to The Mineralogical...terminated scepter from the Medina mine, Minas Gerais, Brazil. Jeff Scovil photo. (above left) ELBAITE...the Pederneira mine, Sao Jose da Safira, Minas Gerais, Brazil. Jeff Scovil photo. SCHEELITE on muscovite...twins found in 1940 at Itagua~u, Espirito Santo, Brazil. Jeff Scovil photo. Supplement to The Mineralogical |  | | Journal (article/letter/editorial) | | and lithian muscovite occur in high-pressure spodumene, low-pressure petalite, phosphorus-enriched amblygonite...morphologies or paragenetic position. Lepidolite from spodumene subtype pegmatites are generally slightly less...presence of abundant lithium aluminosilicates (spodumene, petalite) and/or lithium phosphates (amblygonitemontebrasite)...dominant lithium mineral present (Cern¢, 1989). The spodumene subtype represents a high-pressure, low-temperature...core and/or in pegmatitic pockets. Within the spodumene, petalite and amblyg0nite subtype pegmatites, |  | | Report (issue) | | Pattern: Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. 3.052 (100), 6.112 (86), 3.191 (52), 1...35 (1) Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil; average of 3 wavelength-dispersive spectroscopic...Association: Microcline, albite, quartz, muscovite, spodumene, “lepidolite”, cassiterite, tantalite-(Mn), monazite-(Ce)...João del Rei Pegmatite Province, Nazareno, Minas Gerais, Brazil. Name: For a member of the microlite subgroup...Institute of Geosciences, University of São Paulo, SP, Brazil (DR725). References: (1) Andrade, M.B., D. Atencio |  | | Report (issue) | | Pattern: Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. 3.005 (100), 3.138 (83), 5.997 (59), 2...23 (1) Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil; average of 6 electron microprobe analyses...Association: Microcline, albite, quartz, muscovite, spodumene, “lepidolite,” cassiterite, tantalite-(Mn), monazite-(Ce)...From the Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil. Also at the Harding pegmatite, New Mexico...Material: Geology Museum, University of Sãn Paulo, Brazil (DR731). References: (1) Andrade, M.B., D. Atencio |  | | Book | | opside CaMgS, 2O6 190 Jadeite (see gems) NaAISi2O6 Spodumene (see gems also) LiAISi 2O6 191 -193 Pyroxenoids...across 81 Twinned Chrysoberyl 82 Espirito Santo, Brazil 8 cm (3'/a 1n ) across Spine) on Rock Matrix...across Brazilian ite Conselheira Pena, Minas Gera1s, Brazil 10 cm (4 in.) across 117 118 Fluorap11ti... 119 120 Fluorapatite Lavra da llha, Minas Gerais, Brazil 4 cm (1 Yi in.) across Pyrornorphite Bunker...long Hydroxylherderite Virgem da Lapa, Minas Gerais, Brazil 10 cm (4 in ) across 125 Hydroxylherderite |
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Urucum claim, Barra do Cuieté, Conselheiro Pena, Minas Gerais, Brazil