 | | Report (issue) | | MINERAIS PROJECT REPORT Brazil Investigations (IR)BR-74 TUNGSTEN RESOURCES OF BRAZIL U. S. Geological Survey...standards or nomenclature 1974 TUNGSTEN RESOURCES OF BRAZIL By Max G. White CONTENTS Pages ABSTRACT .......tungsten in Brazil ........ 7 SCHEELITE DEPOSITS ...................... 7 Northeast Brazil. ..........Geologic setting of scheelite deposits ....... 7 Brejui Mine. .................... 10 Production, reserves...reserves, and resources potential .... 12 Rio Grande do Sul .................... 16 Location ........ |  | | Journal (article/letter/editorial) | | Min., Bol. 209, Rio de Janeiro 1964. DE MORAES, L.J.: Dep6sitos diamantlferos no norte do Estado de Minas...Bol. 8, Rio de Janeiro 1934. - - : Geologia Geral. - - Serv. Fore. Prod, Min., Bol. 19, Rio de ]aneiro...142, Rio de Janeiro 1968. PFLU~, R., SCHOBnENaAUS, C., & RENGES, F.: Contribuig~o ~ geotect6nica do Brasil...Bahia. - - Min. e Met,, 15, Rio de Janeiro 1951. SCHOgZENHAUS, C.: Sure,rio da geologia da Quadrieula Ibitiara...Ibitiara, Bahia, Sure,rio da geologia da Quadrieula de Paramirim, Bahia. - - SUDENE, Div. Geol., Bol |  | | Journal (article/letter/editorial) | | the 120 ROCKS & MINERALS Wendy pit at the Tambo mine is associated with hydrothermal breccias that have...creamcolored calcite within cavities in the dolostone. The crystallization of the quartz and calcite was probably...probably contemporaneous. In most pockets, the calcite has weathered away, releasing the scepters. Skeletal...a few skeletal crystals formed as floaters in calcite. The largest skeletal crystals are more than 12... Dolomite, calcite, iron sulfides, and anthraxolite are common in pockets but usually do not form well-crystallized |  | | 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 (issue) | | stilbite, heulandite, okenite, gyrolite, prehnite, calcite, apophyllite blanche, scolecite, rubis sur gangue...gangue, etc ... De 100 g à 10 kg pièce. Grande variété de pierres taillées, précieuses et semi-précieuses...Ti:lt·plm11<' iJt,.95.·16 • DIRECTEUR 28 LES VIÉ. Nive mine 33 ITINÉRAIRES MINÉRALOGIQUES AU BRÉSIL. par J...J. et J. CASSEDANNE. Les environs de Currais Novos, différents gisements facilement accessibles et riches...récente, ce japse devient déjà rare. Il présente une grande variété de couleurs : vert, rouge, ocre, brun et |  | | 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 |  | | Journal (article/letter/editorial) | | Brodtkorb et al. 1977; Delakowitz 1987; Hack 1987; NE Brazil, Beurlen et al. 1982; Busch 1981; Reid 1983; Bro-...rock types in the ACC: 1. stratiform scheelite in calcite-dolomite marbles (Murtaler Berge, Koralpe) 2. stratabound...dominanted by grossular, clinozoisite/zoisite, calcite, quartz, plagioclase and clinopyroxene. Using the...calc-silicate rocks from the Koralpe. zoisite-- calcite quartz grossular 2 Z o + 5Cc + 3Qu = 3Gr + 5 C...20 (1) zoisite - anorthite-rich plagioclase - calcite 2 Z o + 1C02 = t C c + 3 A n + 1 H 2 0 (2) Petrology |  | 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 |  | 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...mainly of illite, adularia, chlorite, epidote, and calcite. Deposits occur most commonly within or adjacent...Cretaceous and early Tertiary age Rio Suclo; East tributaries of Rio Atrato and Rio San Juan Accreted Island...anomalies Indicate shallow basement near headwater of Rio San Juan Terrane: Domain #3. CORDILLERA OCCIDENTAL |  | | 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) | | 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...subject, as in a scale model of the workings of a mine, to a unifying concept that explains or describes...Valley type is the presence of secondary dolomite. But do we know that this is essential? Suppose a deposit...figures; nevertheless, the grade-tonnage figures given do represent material that the company or the government |  | | Book | | incompletely characterized hydromicas-these nebulous species do not form visible crystals and in themselves are never...excellent loose ilmenite crystal clusters from a calcite vein-dike digging site which they called the Bentley...Springfield show ( 1995: 582). Madawaska [Faraday] mine near Bow Lake, Hastings County. Some of the world's...finest ilmenite specimens have come from an unusual calcite vein-dike occurrence with an exposure very near...property of, the old Madawaska uranium mine (called the Faraday mine before 1964). The mineral assemblage |  | | 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...as those having alternate layers of concentric calcite and barite, suggest that the nodules formed during...septarian pyritic and calcareous concretions. Calcite, pyrite, and sphalerite are associated with barite |  | | 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 |  | | 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) | | 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 | | Similarly Augustithis (1985) explained cases of calcite veins in marbles as being lateral secretions of...interrelationships, it is no surprise that these metallic elements do occur as ore concentrations in the mantle and its...(ii) Siderite (often manganiferous) fluorite, calcite, barite, chalcedony (epithermal ores). The sequence...solvent and the solute are of nearly the same size, do not form intermediate compounds and have the same...abundant in arsenopyriterich samples from Wongabah Mine, characteristically forming aggregates of fibrous |
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