 | | Journal (article/letter/editorial) | | altered chromitites of the Campo Formoso layered intrusion (Bahia State, Brazil): control by magmatic and...hydrothermal metasomatism in chromitites of the Campo Formoso layered intrusion produced spectacular chromite...with igneous mafic-ultramafic complexes. Chromian spinel from chromitites commonly contains discrete inclusions...stable at low temperature. The Campo Formoso layered intrusion of Brazil provides a useful example for...chromitite layers from one of the deposits of Campo Formoso (Cascabullhos), and emphasized the similarity |  | Lord, R. A., Prichard, H. M., S.SA, J. H., Neary, C. R. (2004) Chromite Geochemistry and PGE Fractionation in the Campo Formoso Complex and Ipueira-Medrado Sill, Bahia State, Brazil. Economic Geology, 99 (2) 339-363 doi:10.2113/gsecongeo.99.2.339 | Journal (article/letter/editorial) | | Fractionation in the Campo Formoso Complex and Ipueira-Medrado Sill, Bahia State, Brazil R. A. LORD,† Clean...de Geociências, Universidade Federal da Bahia, Salvador, Brazil AND C. R. NEARY Formerly at Natural Environment...8-m-thick highly massive chromitite layer. Green spinel in the orthopyroxene-rich peridotite and ubiquitous...retrograde alteration and serpentinization. In Campo Formoso a deeply eroded stratiform complex contains...orthopyroxene relicts in an upper unit at the Cascabulhos mine. Microprobe studies of chromite-rich specimens from |  | | Journal (article/letter/editorial) | | Ipueira-Medrado Sill, São Francisco Craton, Bahia State, Brazil JULIANA CHARÃO MARQUES† Instituto de Geociências...Caixa Postal 15001, CEP 91501-970, Porto Alegre-RS, Brazil AND CESAR FONSECA FERREIRA FILHO Instituto de...Universitário, Asa Norte, Brasília-DF, CEP 70910-900, Brazil Abstract The Ipueira-Medrado mafic-ultramafic...mafic-ultramafic sill hosts the largest chromite deposit in Brazil. The sill is a 7-kmlong and 300-m-thick elongated...representing the largest concentration of chromite in Brazil (Marinho et al., 1986). The ore in the Ipueira-Medrado |  | | Journal (article/letter/editorial) | | Economic Geology, v. 108, pp. 1753–1771 The Limoeiro Deposit: Ni-Cu-PGE Sulfide Mineralization Hosted...Conduit in the Borborema Province, Northeastern Brazil Jonas Mota-e-Silva,1,2,† Cesar Fonseca Ferreira...01037-912, Brazil 2 Instituto de Geociências, Universidade de Brasília, Brasília, DF. 70910-900, Brazil Abstract...Abstract The Limoeiro deposit, located in a high-grade mobile belt of the Brasiliano orogenic cycle (650–500...age of the ultramafic intrusion that hosts the Limoeiro deposit is not yet known, but regional geologic |  | | Journal (issue) | | NUMBER SIX APRIL 1993 Cover Picture The Hematita mine in Minas Gérais in 1987 - probably the richest alexandrite...deposits of alexandrite, cat's-eye and chrysoberyl in Brazil' pp. 333-54) ISSN: 0022-1252 F.G.A. your key...obtained by this method from an inclusion in a pink spinel octahedron from Sti Sri Lanka. Photomicrograph...to be able to deterAlthough it is very important mine if if a gem is natural or synthetic, and treated...illustration of this technique, a natural pink Sri Lankan spinel crystal containing a transparent, 324 apparently |  | | 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,...turquoise vein near the village of Casa Nova, in Bahia, later flooded by the waters of the Sobradinho dam |  | Mota-E-Silva, Jonas, Prichard, Hazel M., Suárez, Saioa, Ferreira Filho, Cesar F., Fisher, Peter C. (2016) Supergene Alteration of Platinum-Group Minerals and the Formation of Pd-Cu-O and Pd-I-O Compounds In the Limoeiro Ni-Cu-(PGE) Deposit, Brazil. The Canadian Mineralogist, 54 (3) 755-778 doi:10.3749/canmin.1500049 | Journal (article/letter/editorial) | | Pd-Cu-O AND Pd-I-O COMPOUNDS IN THE LIMOEIRO Ni-Cu-(PGE) DEPOSIT, BRAZIL JONAS MOTA-E-SILVA Votorantim Metais...05423-180, Brazil University of Brasilia, Geosciences Institute, Brası́lia/DF, 70900-970, Brazil HAZEL M...Geosciences Institute, Brası́lia/DF, 70900-970, Brazil PETER C. FISHER School of Earth and Ocean Science...weathering of platinum-group minerals (PGM) in the Limoeiro nickel-copper and platinum-group element [Ni-Cu-(PGE)]...over the base metal sulfide-rich parts of the Limoeiro primary ore. The mobility of Pt is very dependent |  | Mota-e-Silva, J., Prichard, H. M., Filho, C. F. Ferreira, Fisher, P. C., McDonald, I. (2015) Platinum-group minerals in the Limoeiro Ni–Cu–(PGE) sulfide deposit, Brazil: the effect of magmatic and upper amphibolite to granulite metamorphic processes on PGM formation. Mineralium Deposita, 50 (8) 1007-1029 doi:10.1007/s00126-015-0585-0 | Journal (article/letter/editorial) | | Platinum-group minerals in the Limoeiro Ni–Cu–(PGE) sulfide deposit, Brazil: the effect of magmatic and...Springer-Verlag Berlin Heidelberg 2015 Abstract The Limoeiro Ni–Cu–(platinum-group elements (PGE)) deposit...igneous tubular conduit system in northeastern Brazil. Representative ores from the deposit have been...13212-161, Brazil 2 Instituto de Geociências, Universidade de Brasilia, Brasília, DF 70900-970, Brazil 3 ...blebs that formed and were transported within the Limoeiro magma conduit. Keywords Platinum-group-minerals |  | | Report (issue) | | Zimbabwe. • Eight industrialized countries4 that mine little or no chromite have a significant (an estimated...chromium (in the form of ores, 3 A captive mine is a mine that produces solely for the parent company...profit-motive criteria would normally result in mine closure. Chromite supplies have been disrupted....mined-the platinum-mineral operation (Western Platinum mine) in the UG2 chromitite layer of the western Bushveld...Reef ores were extracted from the Western Platinum mine, yielding 6,656 kg of platinum-group elements, 1 |  | | Journal (article/letter/editorial) | | Chromite Deposit of the Ipueira±Medrado Sill, Bahia, Brazil J. C. MARQUES1 *, C. F. FERREIRA FILHO2 , R...BENTO GONCËALVES 9500, PORTO ALEGRE-RS, 91509-900, BRAZIL 2 INSTITUTO DE GEOCIEÃNCIAS, UNIVERSIDADE DE BRASIÂLIA-UNB...UNIVERSITAÂRIO, ASA NORTE, BRASIÂLIA-DF, 70910-900, BRAZIL 3 DEPARTMENT OF TERRESTRIAL MAGNETISM, CARNEGIE...Marcelo Gama 1038/ 404, Porto Alegre-RS, 90540-041, Brazil. Telephone: 55-51-30295030. Fax: 55-51-3221-3298...Great Dyke, Zimbabwe (Wilson, 1982), and Bacuri, Brazil (Spier & Ferreira Filho, 2001) intrusions. Recent |  | | Journal (article/letter/editorial) | | Magmatism in the Northern Borborema Province, Northeast Brazil: Tectonic Setting and Potential for Deposits Alanielson...Brasília, 70910-900 Brasília, Distrito Federal, Brazil ABSTRACT Mafic-ultramafic intrusions form a 32-km-long...Piranhas terrane in the Borborema Province, Northeast Brazil. The mafic-ultramafic intrusions consist of wehrlite...Aguablanca deposit in Spain (Tornos et al. 2001). In Brazil, the potential for exploration in orogenic belts...Transversal Domain of the Borborema Province (Limoeiro deposit; Santos et al. 2014; Mota-e-Silva et al |  | | Journal (issue) | | FEATURE ARTICLES Gem Pegmatites of Minas Gerais, Brazil: The Tourmalines of the Araquai Districts Keit-h...tourlnaline thon anywhere else in the world-Minos Gerais, Brazil; the other with (I new locality for red tourmaline-Zcrmbia...bicolored tounnaline (12.90 ct), all from the Himalaya mine (California). Thestones were faceted by PalaInteri~ntional...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 By Keith |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...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...Landmann. CDD-549 Indexes for systematic catalog: 1. Brazil: Minerals and precious stones: Mineralogy and gemology |  | | Journal (issue) | | crystal, 75 mm long, from the Cruzeiro mine, Minas Gérais, Brazil. See 'The location, geology and mineralogy...mineralogy of gem tourmalines in Brazil' on pp. 263-98 ISSN: 1355-4565 262 J. G e m m , 1996, 25, 4 ...location, geology and mineralogy of gem tourmalines in Brazil Jacques P. Cassedanne, Dr. Sc. *, and Maurice Roditi...Non-pegmatitic deposits of tourmaline include the Brumado mine (Bahia) which produces fine red uvite crystals and the...Tourmaline, pegmatite, eluvial deposits, gem mining, Brazil © Gemmological Association and Gem Testing Laboratory |  | | Journal (issue) | | York circulation manager Articles The Boltsbum mine, Weardale, County Duiham, England ................ Bariand Arsenate minerals of the Sterling Hill mine: an overview .....................................from the Virgem da Lapa district, Minas Gerais, Brazil. Sorbonne collec tion, photo by Nelly and Pierre...The Mineralogical Record Jan uary-February, 1982 mine Weardale, CpuntyJ)urham, England t h e B o l...1800’s, fine specimens have issuedfrom the Boltsburn mine and are still occasionally available today. W |  | | 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...NATIONAL MUSEUM IN SOFIA 66 OTHER COLLECTIONS OF MINE IN BULGARIA 71 COLLECTIONS IN OTHER CITIES AROUND |  | | Journal (issue) | | et al. was said to have originated in the Wessel mine near Hotazel by Karuman, N. Cape Province, S. Africa...much from Sri Lanka, Australia and Colombia and Brazil, but what impressed me most was the extent of the...Sillimanite in gem quality is rare; there is some spinel, sphene and titanite, but not much. Topaz is found...Tourmaline mine (yellow-green, rose-red, yellow and colourless tourmaline), the Otjimbingwe mine (red and...the Kubas mine (fine quality yellowish-green, red and rose-colour), the Albrechtshohe mine (emerald-green) |  | | Book | | born hills appear parallel to Mahagiri range due to mine-waste dumping. Unpaved roads serve the movement...The sky is gloomy throughout the day due to the mine and road dust. Social evils, crime, alcoholism,...education, counseling, and training. Making stringent mine-safety rules is not the solution—it has to be implemented...Ore Group Orissa Mining Corporation Limited Run of Mine Reconnaissance Permit tonnes tonnes per annum/day...significant in Canada, United States, Australia, Africa, Brazil, New Caledonia, Philippines, Indonesia, and the |  | | Report (issue) | | Costa Rica Guatemala Puerto Rico United States Brazil Colombia .. Tndo-China Japan Manchuria Netherlands...principally in the oxide form in the minerals of the spinel group, especially chromite, and to a minor extent...one of the heaviest and softest minerals of the spinel group; the specific gravity ranges from 4-6 in...Siemensit,” which is essentially an artificial spinel made by fusing a mixture of the slag produced during...account of the shattered nature of the ore-bodies, the mine having been previously developed by means of rises |  | | Journal (issue) | | from Brazil shows chatoyancy caused by flat hollow channels. Four-rayed star aquamarine from Brazil has...the c-axis. A tourmaline-quartz combination from Brazil has an iridescent chatoyancy Grey orthoclase moonstone...cat's-eye from Brazil A very unusual example of a cat's-eye was purchased in Brazil by the author in...measuring Figure 1: Chatoyant pale blue topaz from Brazil weighing 152.15 ct. Photo by J. Hyrsl. 32.94 x...described two topaz cat'seyes, one blue of 7.98 ct from Brazil and another colourless of 12.20 ct from Sri Lanka |  | | Journal (issue) | | 1991 Cover Picture Two small secondary synthetic spinel 'satellites'grow from an octahedral face on the...(See 'Gemmological investigation of a synthetic spinel crystal from the Soviet Union'by J.I. Koivula,...NE of the Sandawana mine, along the Mweza Range, which is named 'Machingwe' mine, after a nearby stream...The Machingwe Emerald mine The car journey from Masvingo to the Mashingwe mine takes about 3l/z hours...for the mine became 'Machingwe Syndicate No. No.22 Mine', but is better known under the name Mine: Machingwe |  | | Journal (issue) | | Mulligan Peak (AZ) Purple Agate Collecting Quartz in Brazil Bob Jones’ 2014 Tucson Experience Birthstones...of brightyellow crystals is from the Cozzo Disi mine in Casteltermini (Sicily), Italy, and stands 19...Bob Farrar A quartz crystal-hunting adventure in Brazil Yellow menace, yellow masterpiece by Bob Jones...metals, it forms valuable metal sulfides, which we mine and process. Most major metals today are obtained...form near-surface deposits that are rich enough to mine. Primary minerals are the source of most metals |  | Le Vaillant, Margaux, Barnes, Stephen J., Mole, David R., Fiorentini, Marco L., Laflamme, Crystal, Denyszyn, Steven W., Austin, James, Patterson, Ben, Godel, Belinda, Hicks, John, Mao, Ya-Jing, Neaud, Antoine (2020) Multidisciplinary study of a complex magmatic system: The Savannah Ni-Cu-Co Camp, Western Australia. Ore Geology Reviews, 117. 103292 doi:10.1016/j.oregeorev.2019.103292 | Journal (article/letter/editorial) | | Australia (Maier et al., 2016), Mirabela and Limoeiro in Brazil (Barnes et al., 52 2011; Mota-e-Silva et...Intrusion until 2008 when the 122 Sally Malay Ni-Cu-Co mine was re-named Savannah. Here, we refer to the current...176 to the north and north-west of the Savannah mine as a 1.25 km2 body of interlayered norite, 177...40-50 degree dip toward the NW. Within the Savannah mine area (Figure 273 2B,C,D), the TCG mostly passes...and Savannah North intrusions but 274 between mine Sections 5900 mE to 6450 mE the TCG lies below and |  | | Journal (article/letter/editorial) | | Barnes, and E.V. Pushkarev Ontogeny of ore Cr-spinel and composition of inclusions as indicators of...deposits at the periphery of the Zijinshan copper-gold mine, southeastern China—Bimin Zhang, Xueqiu Wang, Rong...the Qilinchang Zn-Pb-(Ag-Ge) deposit in the Huize mine district, northeastern Yunnan, China—Run-Sheng Han...magmatic suite in the Carajás mineral province, Brazil—Antonio Sales Teixeira, Cesar Fonseca Ferreira...Platinum-group minerals in the Limoeiro Ni-Cu-(PGE) sulfide deposit, Brazil: The effect of magmatic and |  | | Journal (article/letter/editorial) | | Ni-Cu-PGE deposit is the only past-producing nickel mine (1958–1974) in the Canadian Cordillera of British...remains British Columbia’s only past-producing nickel mine (1958–1974), having produced ~4.2 Mt of ore with... Chinaman Pride of Emory Upper 4600 1900 ad mine ro 5481000 mN 5481000 mN R id ge 606500 mE...the Giant Mascot ultramafic suite along the upper mine road (Fig. 2). Deformation features of the Spuzzum...Settler schist Orebodies (projected to surface) Mine tunnels Map symbols road (dirt) stream or river |
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