 | 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...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) at room temperature...zoned Alto Mirador pegmatite, the simple, zoned Escondido pegmatite, and the simple Poaiá pegmatite. From...is obvious that in the samples from the Alto Mirador pegmatite, ferrous iron is present at the dodecahedral |  | | Journal (issue) | | ARTICLES 260 An Update on “Paraíba” Tourmaline from Brazil James E. Shigley, Brian C. Cook, Brendan M. Laurs...tourmalines are also being mined in adjacent Rio Grande do Norte State. 278 pg. 261 Spessartine Garnet from...the bright orange garnets from this century-old pegmatite locality. NOTES AND NEW TECHNIQUES 296 Pink...corundum from Wyoming • Green kyanite from Bahia, Brazil • “Ruby Rock” cabochons • Tourmaline from Warner...of the publisher. ABOUT THE COVER The Ramona pegmatite district in southern California was the world’s |  | | Journal (issue) | | 2000) natural pearls, formed within molluscs that do not produce nacre (Gutmannsbauer and Hanni, 1994;...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:...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) | | aplites of the Pala Chief and Elizabeth R layered pegmatite-aplite dikes, Pala District, California, and the...USA incompatible character of Zn in evolving pegmatite-aplite melts and shows the usefulness of gahnite...measured here may indicate a source of granitic pegmatite-aplite. Keywords Gahnite . Aplite . California...Mg]Al2O4), occurs as an accessory mineral in granitic pegmatite dikes (e.g., Nêmec 1973; Batchelor and Kinnaird...Morris et al. 1997; McClenaghan 2005). In granitic pegmatite dikes gahnite is commonly overlooked due to its |
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