 | | Journal (article/letter/editorial) | | the 120 ROCKS & MINERALS Wendy pit at the Tambo mine is associated with hydrothermal breccias that have...and anthraxolite are common in pockets but usually do not form well-crystallized specimens of interest...MINERALS FROM THE SKARN OF MINA BREJUI, RIO GRANDE DO NORTE, BRAZIL. A. U. Fedster’, L. B. dn Silvn Neil2...Pernambuco, Brazil. Unusual small pyrite crystals occur in the skarn of Mina Brejui near Currais Novos in the...the state of Rio Grande do Norte, Brazil. The skarn body is presently being mined for tungsten. Among |  | | Journal (article/letter/editorial) | | e d i n t h i s i n d e x . Acari, Rio Grande do Notre, Brazil, Bismutotantalite, 785. Adularia,Zambia...India, 1018. Alto Feio, Pedra Lavrada, Paraiba, Brazil, bismoclite, bismuth, bismutite, 785. Alunite,...li. Arrojadite, Brazil, d.t.a., 427. Arsenic, geochemistry of, 88. Arsenobismite, Brazil, 785. Artern,...Bancroft, Ontario, peristerite, 165. Barbosalite, Brazil, 784. Barium feldspars, see Barinm-orthoclase,...Bearpaw Mtns., Montana, pseudoleucite, 596. Benallt mine, Rhiw, Caernarvonshire, celsian, 508. Berek compensator |  | | Journal (issue) | | Minerals from the Skarn of Mina Brejui, Rio Grande do Norte, Brazil Alexander U. Falster1 Luizhelio Barreto... 556 Boa Viagem, 51021-310 Recife, Pernambuco, Brazil • Tungstenite is a relatively rare mineral and...d'Ossola, Italy; Lyangara, Uzbekistan; and the Emma Mine, Little Cottonwood District, Salt Lake Co., Utah...New Orleans, organized a three week fieldtrip to Brazil. The major goal was to study granitic pegmatites...were also investigated. One of these, the Mina Brejui, was the source of line tungstenite (Figs. 1-2) |  | | Journal (article/letter/editorial) | | wo]framite, 995. Pengenna mine, St. Kew: meneghinite, 424. South Terras mine, St. Stephen-in Brannel:...argentojarosite, li. WALES Benallt mine, Rhiw, Caernarvonshire: celsian, 508. Clogau mine, Dolgelly, ~ier.ionethshire:...ionethshire: tellurbismuth, 424. Vigra mine, Dolgelly, Merionethshire: tellurbismuth, 424. SCOTLAND Morar...e c h o s l o v a k i a (~eskoslovensko) Plavno mine, Krus'~ tlory, Bohemia: stannian andradite, 379...varlamoffite, 622. Japan Kaso mine, Tochiga : kasolte, 508. Nodo Tamagawo mine, Iwate prefecture: barium-orthoclase |  | | Journal (article/letter/editorial) | | com/loi/tigr20 Geology and Mineral Resources of Brazil: A Review a a Inacio De Medeiros Delgado , Augusto...Pesquisa de Recursos Minerals, Scdvador, Bahia, Brazil b US. Geological Survey, Denver, CO, 80225 Version...Thorman (1994): Geology and Mineral Resources of Brazil: A Review, International Geology Review, 36:6,...rights reserved. Geology and Mineral Resources of Brazil: A Review INACIO DE MEDEIROS DELGADO, AUGUSTO J...Pesquisa de Recursos Minerals, Scdvador, Bahia, Brazil AND CHARLES H. THORMAN US. Geological Survey, Denver |  | | 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 |  | | Report (issue) | | be reported because they may not be economic to mine at the time they are explored. Balancing these...because mining concerns attempt to develop long-range mine plans now. It is also more common in recent years...sources listed in references) Deposit name Newmon Mine Allan (Johnson Lease) . Courtwright (Daggett Lease)...Amador ...do.. ...do.. ...do.. ...do.. ...do.. ...do.. Butte ...do.. ..:do.. ...do.. ...do.. ...do.. ...do...do.. ...do.. ...do.. ...do.. ...do.. ...do.. ...do.. ...do.. ...do.. ...do.. ...do.. ...do.. ...do.. |  | Amstutz, G. C., Goresy, A. El, Frenzel, G., Kluth, C., Moh, G., Wauschkuhn, A., Zimmermann, R.A. - Eds. (1982) Ore Genesis. Springer Berlin, Heidelberg. doi:10.1007/978-3-642-68344-2 | Book | | block I experienced recently when visiting a gold mine in virtually unmetamorphosed ground. A fault cuts..."common sense" observations described from the gold mine with the chert and the organic matter. Another potent...Alterations of Conglomeratic Uranium Ores, Pronto Mine, Ontario, Canada E.Wm. Heinrich (With 1 Figure)...Observations on Ore Rhythmites of the Trzebionka Mine, Upper Silesian-Cracow Region, Poland L. Fontbote...the Cobaltite-Gersdorffite Series from the Raipas Mine, Finnmark, Norway F.M. Vokes and G.S. Strand (With |  | Amstutz, G. C., Goresy, A. EI, Frenzel, G., Kluth, C., Moh, G., Wauschkuhn, A., Zimmermann, R.A. - Eds. (1982) Ore Genesis - The State of the Art - A Volume in Honour of Professor Paul Ramdohr on the Occasion of His 90th Birthday With Special Reference to His Main Scientific Interests - Special Publication of the Society for Geology Applied to Mineral Deposits No. 2. Springer Berlin Heidelberg. | Book | | block I experienced recently when visiting a gold mine in virtually unmetamorphosed ground. A fault cuts..."common sense" observations described from the gold mine with the chert and the organic matter. Another potent...Alterations of Conglomeratic Uranium Ores, Pronto Mine, Ontario, Canada E.Wm. Heinrich (With 1 Figure)...Observations on Ore Rhythmites of the Trzebionka Mine, Upper Silesian-Cracow Region, Poland L. Fontbote...the Cobaltite-Gersdorffite Series from the Raipas Mine, Finnmark, Norway F.M. Vokes and G.S. Strand (With |  | Hodges, C.A., Cox, D.P., Singer, D.A., Case, J.E., Berger, B.R., Albers, J.P. (1984) U.S. Geological Survey-INGEOMINAS mineral resource assessment of Colombia. Open-File Report Vol. 1984 (84-345) US Geological Survey doi:10.3133/ofr84345 | Report (issue) | | deposits of such minerals in adjacent areas of Brazil and Venezuela suggest that eastern Colombia may...deposits, based on analogy with adjacent areas in Brazil and Venezuela. An initial reconnaissance should...molybdenite and pyrite, the other rich in gold and magnetite. Some deposits have no recoverable gold or molybdenum...identifying such high level igneous environments. Magnetite, in veinlets and disseminations associated with...or oxidation of magnetite) surrounding a magnetic high caused by the abundant magnetite in the copper |  | | Journal (article/letter/editorial) | | relaeiones entre 6stas franjas son similares entre Norte y Sud Am6rica. Esto indica que dependen de la distribuei6n...and SCHNE1DER-SCHERBINA (1964); AHLEELD(1967). Brazil: JomM (1941). Chile: t~taz and ERmKSEN (1962);...FERNANDEZ LIMA for Argentina, G. TOLBEi=tT ~or Brazil, D. H. MGLAuGHLIN, JR. ~or Colombia, E. M~3LLER-KAHLE...he made occasional trips to Argentina, Bolivia, Brazil, Chile and Uruguay, thus being able to lay the...For most of this presentation these generalizations do not obscure critical detail, but where this happens |  | | Report (volume) | | volcanic-hosted magnetite, by Dennis P. Cox 172 Grade and tonnage model volcanic-hosted magnetite, by Dan L...of volcanic-hosted magnetite deposits 173 Iron grades of volcanic-hosted magnetite deposits 174 Phosphorus...Phosphorus grades of volcanic-hosted magnetite deposits 174 Tonnages of carbonate-hosted Au-Ag deposits 177...based on considerations that extend far beyond the mine itself, in some instances relating to the overall...another. This goal is difficult to attain, because we do not always know which features are site specific |  | | Report (issue) | | carbon, petroleo y gas con extension mucho mas grande (y de mas importancia economica). Esta obra varfa...una ocurrencia mineral de tamaflo suficientemente grande y de ley tan alta que, bajo las circunstancias...de los modelos representan los atributos de un grande numero de yacimientos y los nombres son solamente...secundarios) se presentan como cero. For razon del tamafio grande de la base de datos no se presentan referencias...U.S. Geological Survey mantiene disponible una grande cantidad de datos en los archives del Hineral Resources |  | | Report (volume) | | examples of commodity geology research. These examples do not comprehensively cover the range of geologic research...applications to mineral commodity problems, but they do offer a sampling or flavor of the diversity of important...inequities cannot be resolved "without major efforts to do so." (McLaren and Skinner, 1987, p. 1). In addition...and laminae can be explained by other models that do not involve introduction of barium in hydrothermal...barite precipitates at lower levels of oxidation than do manganese oxides; thus, barite is more likely to |  | | Book | | incompletely characterized hydromicas-these nebulous species do not form visible crystals and in themselves are never...Springfield show ( 1995: 582). Madawaska [Faraday] mine near Bow Lake, Hastings County. Some of the world's...property of, the old Madawaska uranium mine (called the Faraday mine before 1964). The mineral assemblage...assemblage of the vein-dike consists of ilmenite. magnetite, anatase, biotite, microcline and minor fluorapatite...Trimble and Cowgill, 1977). LATINAMERICA BRAZIL Jacupiranga mine, Sao Paulo. Among the crystallized minerals |  | | Report (issue) | | highest-lying diamond pipe. Commissioning Letseng mine at 10 500 feet during the last two years has called...se IRON (LIBERIA) LEAD (AUSTRALIA) > IRON (BRAZIL) —- LIMESTONE (CURACAO) ASBESTOS (AUSTRALIA)...Whatever you're mining, wherever you're mining, mine it on Bridgestones Bridgestones — for all the variables...Operating conditions differ enormously from mine to mine. Not only are there variations in the kind of...off-the-road tires. No matter what the conditions are, we do our utmost to build the tire to meet them. Utilizing |  | | Book | | process. Recently, Vgenopoulos (1960) has described magnetite, rutile and ilmenite in quartz veins as being...this is not a decoloration margin but actually magnetite is formed as the result of a chromospinel reacting...interrelationships, it is no surprise that these metallic elements do occur as ore concentrations in the mantle and its...earliest minerals to form being cited first: 1. Magnetite, ilmenite, chromite, haematite. 2. Cassiterite...crystallize, forming melts in nature are the oxides, magnetite, rutile, ilmenite and haematite and these minerals |  | | Report (issue) | | Afghanistan _______________________________ _ 215 Brazil ____________________________________ _ 215 Chile...06 ppm), and chlorine ( 0.04 percent). Gold Acres mine, Nevada.-T. J. Armbrustmacher found anomalously...several metals in rocks from the Gold Acres open-pit mine, Lander County, north-central Nevada. Titanium,...inclusions, and local variations of elements within the mine, suggest the imprint of at least two sequences of...below the top of the ore zone at the Carlin gold mine, Eureka County, Nev., by T. E. Mullens and J. F |  | | Report (issue) | | Summary by countries. ________________-_-_----Brazil--.-.---.. -__---._------------------CENTO _ -_...of 8 to 10 sq mi in the vicinity of the King Tut mine. The gold content of these arroyo gravels is highly...The COLORADO prospect and the Karla Kay uranium mine, 2 miles west-northwest, appear to lie on the same...and T. J. Armbrustmacher show that the open-pit mine at Gold Acres, Lander County (loc. 4) ? li®8 in...mapping by A. S. Eadtke in and around the Carlin gold mine in Eureka County (loc. 8) , shows that the gold |
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