 | | Journal (article/letter/editorial) | | Tantalite-(Mn) from the Borborema Pegmatite Province, northeastern Brazil: conditions of formation and meltand...tantalite-(Mn) from the Alto do Giz pegmatite in the Borborema Pegmatite Province, northeastern Brazil were investigated...crystals. The results demonstrate that in the Alto do Giz pegmatite, water- and alkaline carbonate-rich fluids...Federal de Pernambuco, 50740-530 Recife, Pernambuco, Brazil alkaline carbonate-rich fluids and melts necessary...crystallized during pegmatite formation, this mechanism must also have implications for pegmatite genesis in general |  | | Journal (article/letter/editorial) | | MAY 1945 SIMPSONITE AND THE NORTHERN BRAZILIAN PEGMATITE REGION BY FREDERICK H. POUGH CONTENTS Page 505...and acknowledgments General description of the Alto do Giz Mineralogy Simpsonite Microlite Tantalite and...ILLUSTRATIONS Figure 1.—Typical tabular yellow-brown Alto do Giz simpsonite crystal 2.—Minute tabular, buff-colored...fragment from Onca Mine Plate 1.—Simpsonite 2.—Alto do Giz 3.—Kaolinite replacements 4.—Microlite and cyrtolite...ABSTRACT A study of the Alto do Giz, near Equador, Rio Grande do Norte, Brazil, reveals an interesting |  | | Report (issue) | | 505(2) Z=3 X-ray Powder Pattern: Alto do Giz pegmatite, Brazil; after removal of lines due to microlite...05 4.95 [5.5] [100.0] 100.00 (1) Alto do Giz pegmatite, Brazil; by electron microprobe, H2 O + F by...of microlite crystals, in a decomposed zoned pegmatite. Association: Microlite, simpsonite, tantalite...beryl, spodumene, petalite. Distribution: Name: In the Alto do Giz pegmatite, near Parelhas, Rio Grande...Grande do Norte, Brazil. From the Greek for near and its relation to bariomicrolite. Type Material: Royal |  | | Report (issue) | | 515–4.516 Z=1 X-ray Powder Pattern: Alto do Giz pegmatite, Brazil. 1.651 (100), 2.859 (67), 3.69 (62)...1.1 Total 99.96 100.2 99.5 (1) Alto do Giz pegmatite, Brazil. (2) Do.; by electron microprobe, H2 O calculated...manganotantalite, microlite, tapiolite, beryl, spodumene, montebrasite, pollucite, petalite, eucryptite...the Alto do Giz pegmatite, near Parelhas, and the Onça mine, about 25 km distant, Rio Grande do Norte...Norte, Brazil. In the Al Hayat and Mdara mines, Bikita, and at the Benson No. 3 pegmatite, Mtoko, Zimbabwe |  | | Report (issue) | | 5.0930(9) Z = 4 X-ray Powder Pattern: Salinas, Brazil. 2.99 (10), 3.69 (9), 2.41 (7), 1.738 (7), 1.483...microcline, beryl, lepidolite, muscovite, tourmaline, spodumene, lithiophilite, triphylite, amblygonite, triplite...Facciatoia, Elba, Italy. In the Zambesia, Tete, and Alto Ligonha districts, Mozambique. From Bikita, Zimbabwe... In Brazil, from Salinas, Minas Gerais, and the Alto do Giz pegmatite, near Parelhas, Rio Grande do Norte...Norte. At Stak Nala, Gilgit district, Pakistan. From Wodgina, Greenbushes, and on Mt. Holland, Western |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Crystal of multicolored tourmaline (84 x 26 mm), Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais...(Camara Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo...pedras preciosas do Brasil Bibliography 1. Gemology 2. Geology 3. Minerals - Brazil 4. Minerals- Classification... Mineralogy 6. Mineralogy - Brazil - History 7. Precious stones - Brazil I. Bartorelli, Andrea. II. Title |  | Hawthorne, Frank C., Burke, Ernst A. J., Ercit, T. Scott, Grew, Edward S., Grice, Joel D., Jambor, John L., Puziewicz, Jacek, Roberts, Andrew C., Vanko, David A. (1988) New Mineral Names. American Mineralogist, 73 (1-2) 189-199 | Journal (article/letter/editorial) | | = [l00], Z A c = 15. The mineral occurs in a pegmatite with beryl and columbite at Kobokobo, Kiku, Zaire...280(70)(112,131).Three weak lines have ftkl valuesthat do not spacegroup/4 /mmm, a: 4.597(5),c: 11.034(8)A...oxide zone of the Mannarditet Cumobabi molybdenum pegmatite deposit southwest of CumJ.D. Scott, G.R. Peatfield...5)(4.1,6.3) mineral speciesfrom the Evans-Lou pegmatite,Quebec.Can. data are a: 2.26(l), e: 2.42(l). calculatedfrom...oxide-mineral assemblages of the Alto do Giz pegmatite,Rio Grande do Norte, Brazil. Associatedminerals include |  | | Journal (article/letter/editorial) | | data obtained from melt inclusions primarily in pegmatite quartz we have shown in this, and previous papers...system. This provides important evidence that pegmatite-forming processes have already begun at high temperatures...constraints of its own, so drawing conclusions about pegmatite-forming processes from data gained from slightly...Thomas at al. (2000) demonstrated for T the pegmatite-granite system from Ehrenfriedersdorf, Erzgebirge...However, an analysis of the inclusion diversity in pegmatite quartz clearly shows a vapor phase can also coexist |  | | Book | | incompletely characterized hydromicas-these nebulous species do not form visible crystals and in themselves are never...Watson, Trimble and Cowgill, 1977). LATINAMERICA BRAZIL Jacupiranga mine, Sao Paulo. Among the crystallized...Remedios mine, although generally Taxco ilvaite crystals do not exceed 6 mm (Des Revieres and Beals, 20 l l )...Mcgaw, per'>onalcommunication, 2007). 4 ITALY Rio Marina area, Island of Elba, Tuscany. Elba (Latin:...just to the south of the Rio Marina iron mine. On the coast near Torre di Rio, near the clock tower for |  | | Book | | another oxide, "yttria", from minerals found in the pegmatite at Ytterby, Sweden. Both supposed oxides were...Swedish ehernist Ekeberg in the eourse of analyzing pegmatite minerals from Ytterby, Sweden and Kimito, Finland...minerals from the same loeality, the farnaus pegmatite at Ytterby, Swcden. This faet stresses the geoehemieal...themselves. Then, why and under which conditions do they fractionate? Understanding the fractionation...(with 3 Figures) . . 189 Characteristics of Pegmatite Deposits of Tantalum. P. Cerny (with 18 Figures) |  | | Book (edition) | | 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Spodumene Quartz Opal Turquoise Lapis Lazuli Jade – Geology...the simple expositions given in Practical Gemmology do not now cover the subject adequately and a new book...to crystallize around local centres. The first to do so are those that form at the highest temperatures...Very coarse pegmatite at least 8 m (26 ft) thick at Urubu, near Araçuai, Minas Gerais, Brazil. Fine pink...and elsewhere are famous for carrying gold, and pegmatite veins may contain minerals with rare elements |  | | Catalog/List | | In the early 1980s Rock began to concentrate on Brazil and Peru with occasional trips to Uruguay, Chile...Another was the 7,500+ quartz in Minas Gerais, Brazil: a micromount collection. And of course, there..............................................196 Brazil..................................................knows what the lust for Red Cloud Wulfenites can do? Every time the place gets ‘worked’ the story is...friends with in the old folks home. Do you feel lucky, punk? Well, do you? Overall Measurements: 1.6 x 1 |  | | Book (volume) | | and Peng Wenshi (1982). However, these publications do not contain any analytical data for reference samples...yegorovite Na4[Si2O4(OH)2]2·7H2O from the Palitra pegmatite, Lovozero massif, Kola peninsula hydrated proton)...synthetic analogue of hydroniumjarosite because they do not conform to R-3 m symmetry. In IR spectrum of...Locality: Ampanodiana North pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa Commune... Locality: Ministerskaya Yama Pit, Sarapulka pegmatite field (near Sarapulka village), Murzinka district |
|
