 | | Journal (article/letter/editorial) | | PYROCHLORE-GROUP MINERALS FROM THE LUESHE AND ARAXÁ (BARREIRO) CARBONATITES BY 57Fe MÖSSBAUER SPECTROSCOPY...Lueshe in the Democratic Republic of Congo, and Araxá in Brazil. In contrast to the common assumption that...O2– and 1 OH–, whereas in bariopyrochlore from Araxá, the unusually large value of the quadrupole splitting...Republic of Congo, and the Barreiro carbonatitic complex at Araxá, in Brazil, using 57Fe Mössbauer spectroscopy...bariopyrochlore with BaO up to 19% (Mariano et al. 1997) from Araxá was used for the present investigation. All samples |  | | Report (issue) | | REPORT Brazil Investigations (IR)BR-76 NIOBIUM (COLUMBIUM) AND TANTALUM RESOURCES OF BRAZIL U. S. Geological... NIOBIUM (COLUMBIUM) AND TANTALUM RESOURCES OF BRAZIL By Max G. White U.S. Geological Survey CONTENTS...deposits ............................... 10 The Barreiro (Araxa) deposit ..................... 10 The...Distribution of alkalic intrusives in Southern Brazil .. 16 Alkalic intrusions in the western side of...geologic setting of deposits .............. 24 Minas Gerais ...................................... 24 Bahia |  | Gomes, Celso de Barros, Comin-Chiaramonti, Piero, Azzone, Rogério Guitarrari, Ruberti, Excelso, Rojas, Gaston Eduardo Enrich (2018) Cretaceous carbonatites of the southeastern Brazilian Platform: a review. Brazilian Journal of Geology, 48 (2) 317-345 doi:10.1590/2317-4889201820170123 | Journal (article/letter/editorial) | | Universidade de São Paulo – USP, São Paulo (SP), Brazil. E-mails: cgomes@usp.br, rgazzone@usp.br, exrubert@usp...carbonatite occurrences of different regions of Brazil, Paraguay and Bolivia. Locality Occurrence Petrography...Petrography Mineralogy Age References BRAZIL Ribeira Valley 1 Barra do Itapirapuã Dike, vein, breccia..., Flo, Op (Hm, Il), Ch n.d. 75, 76 15 Araxá (Barreiro) Stock, dike Mg-ca, Ca-ca, Fe-ca Gl, Py,...Toniolo et al. (2013); 76, Monteiro et al. (2016); Araxá: 77, Issa Filho et al. (1984); 78, Traversa et al |  | Melgarejo, Joan C., Costanzo, Alessandra, Bambi, Aurora C.J.M., Gonçalves, Antonio O., Neto, Andrés B. (2012) Subsolidus processes as a key factor on the distribution of Nb species in plutonic carbonatites: The Tchivira case, Angola. Lithos, 152. 187-201 doi:10.1016/j.lithos.2012.06.024 | Journal (article/letter/editorial) | | conditions for mineral precipitation. Nb-rich rutile, gorceixite, Ba-rich K-feldspar and late Ba-poor K-feldspar...economic point of view: the Seis Lagos deposit in Brazil, the largest Nb deposit in the world, has reserves...(Pcl4) infill porosity in fluorite geodes (Fl) and gorceixite (Gcx) replaces K-feldspar (Kfs). k) Inclusions...secondary apatite (Ap2); to also notice the growth of gorceixite (Gcx) within the geodes. l) Sequence of late...in association with Ba-rich minerals such as gorceixite [BaAl3(PO4)(PO3OH)(OH)6] and barite (Fig. 5i) |  | | Report (issue) | | led by, in decreasing order of reserves, China, Brazil, Australia, and India (Gambogi, 2015). Australia...Western Australia, Australia, and Araxá in the State of Minas Gerais, Brazil). The principal REE minerals...20° 10° 0° 10° 20° 30° 40° 50° 60° 80° Araxá Buena Norte mining district Zandkopsdrift Lofdal...)3(F,OH) Gadolinite (REE,Y)2Fe2+Be2Si2O10 Gorceixite (Ba,REE)Al3(PO4 )2(OH5• H2O) Goyazite (Sr...rhapdophane, crandallite-group minerals (florencite, gorceixite, goyazite), and cerianite; these are secondary |  | | Journal (article/letter/editorial) | | Weathered crusts overlying carbonatite complexes in Brazil and one hard rock carbonatite deposit in Canada...currently Mibra Mine, Volta Grande (Brazil), the Pitinga Mine (Brazil) and Marropinno (Mozambique). The...Papp (2009a, 2011a, 2013a) 1200 1000 Australia Brazil Canada 800 Rwanda Mozambique 600 Other World...Russia and India. Production comes primarily from Brazil. Production from Canada and other 500 400 300...and Papp (2009a, 2011b, 2013b) 70000 60000 50000 Brazil 40000 Canada 30000 Other World Total 20000 |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais. Collection of Alvaro Lucio. Photograph taken...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 |  | | Journal (article/letter/editorial) | | a by-product from beach deposits in Australia, Brazil, India, Malaysia, Thailand, China, Taiwan, New...limited to India, Malaysia, Sri Lanka, Thailand, and Brazil. Detailed studies show that the monazite content...mobility during sediment diagenesis (e.g., Smith and Barreiro 1990; Akers et al. 1993; Ohr et al. 1994; Cuney...Early-diagenetic REE-phosphate minerals (florencite, gorceixite, crandalite and xenotime) in marine sandstone:...Metallurgy, Parkville, pp 1591–1594 Smith HA, Barreiro B (1990) Monazite U-Pb dating of staurolite grade |  | Smith, M.P., Moore, K., Kavecsánszki, D., Finch, A.A., Kynicky, J., Wall, F. (2016) From mantle to critical zone: A review of large and giant sized deposits of the rare earth elements. Geoscience Frontiers, 7 (3) 315-334 doi:10.1016/j.gsf.2015.12.006 | Journal (article/letter/editorial) | | (Moore et al., 2015). ACCEPTED MANUSCRIPT Araxá – Araxá is a carbonatite intrusion-hosted deposit, which...forms part of the Alto Paranaiba Province, Southern Brazil (Traversa et al., 2000). It consists of a 4.5 km...intruding Proterozoic schists and quartzites of the Araxá Group. It has 2.5 km wide, fenite aureole (Traversa...references in Traversa et al., 2000). Pyrochlore from Araxá supplies the bulk of the World’s niobium. There...apatite and monazite-(Ce), crandallite, goyazite, gorceixite, and florencite-(Ce), with the HREE being particularly |  | Janots, E., Brunet, F., Goffé, B., Poinssot, C., Burchard, M., Cemič, L. (2007) Thermochemistry of monazite-(La) and dissakisite-(La): implications for monazite and allanite stability in metapelites. Contributions to Mineralogy and Petrology, 154 (1) 1-14 doi:10.1007/s00410-006-0176-2 | Journal (article/letter/editorial) | | allanite at temperatures around 400C (Smith and Barreiro 1990; Wing et al. 2003) and, eventually, to reappear...reappear at around 450 to 525C (Smith and Barreiro 1990; Kingsbury et al. 1993; Franz et al. 1996; Wing...Early-diagenetic REE-phosphate minerals (florencite, gorceixite, crandallite, and xenotime) in marine sandstones:...temperatures. J Phys D Appl Phys 34(6):846–851 Smith HA, Barreiro B (1990) Monazite U–Pb dating of staurolite grade |  | | Book (edition) | | International Symposium on Carbonatites in Pocos de Caldas, Brazil for which this writer was keynote speaker. The... Pakistan, Quebec, Finland, Guyana, Venezuela, Brazil, Paraguay, Angola and South-West Africa, i.a. Carbonatites...Quebec and Araxa, Brazil) and important sources of P, Ti, Cu and CaCO; (Jacupiranga, Brazil). In addition...Carbonatites of the World United States Canada Brazil Greenland, Europe, and the U.S.S.R. Africa India...Algoma-Sudbury districts of Ontario (Parsons, 1961). For Brazil few detailed reports are available, but summaries |  | | Report (issue) | | Paulista phosphate deposit in Pernambuco State, Brazil, in Notholt, A.J.G., Sheldon, R.P., and Davidson...adjacente incluindo depósitos minerais: Brasilia, Brazil, Departamento Nacional da Producao Mineral, p....1989a, The Jacupiranga apatite deposit, Sao Paulo, Brazil, in Notholt, A.J.G., Sheldon, R.P., and Davidson...1989b, The Ipanema phosphate deposit, Sao Paulo, Brazil, in Notholt, A.J.G., Sheldon, R.P., and Davidson...of Catalao I ultramafic alkaline complex, Goias, Brazil, in Notholt, A.J.G., Sheldon, R.P., and Davidson |  | | Journal (issue) | | tropical rain forests of Brazil. Its cultivation is diffi cult, and outside Brazil· it has been established...still require three y ears to reach maturity . In Brazil harvesting takes place at almost any time of y...Poetzscher. Publ. Consel. Fed. Comercio Exterior, Brazil. Pp. 1 42, 9¾ x 7 . (Rio de Janeiro : Imprensa...Imprensa Nacional, 1940.) A study of jute in Brazil and in the world market. With full summary in English. Present...and Colonial Governments RECENT DISCOVERIES OF GORCEIXITE IN THE EMPIRE the numerous samples forwarded |  | | Book | | crandallite from the Alto Benedeto pegmatite, Parai'ba, Brazil (by J.P. Cassedanne & L. Barreto) 22: 183-185 ALTO...Burian goyazite from [Alto Bernardino, Paraiba,] Brazil (by J. S. White, Jr.) 12:379 ALUMOHYDROCALCITE...and muscovite from the Ze Pinto prospect, Minas Gerais, Brazil 21:405-408 --with J.P. Cassedanne: Crystallized...Pitora, Minas Gerais, Brazil 21:409-412 --with J. P. Cassedanne: The Jaguara~u pegmatite, Minas Gerais, Brazil...and platinum from C6rrego Born Sucesso, Minas Gerais, Brazil 23:471-474 AMARGOSA DESERT Hydroboracite |  | | Journal (article/letter/editorial) | | 2001; Tomkins et al., 2005). In contrast, Smith & Barreiro (1990) described a sequence of reactions in which...to reports from previous studies (e.g. Smith & Barreiro, 1990; Kingsbury et al., 1993; Wing et al., 2003;...diagenetic REE phosphate minerals (florencite, gorceixite, crandellite and xenotime) in marine sandstones:...Earth Sciences, 30, 2305–2314. Smith, H. A. & Barreiro, B., 1990. Monazite U-Pb dating of staurolite |  | | Journal (issue) | | ELBAITE on albite, from the Jonas mine, Minas Gerais, Brazil. Keith Proctor specimen; photo by Harold...Rio de Janeiro, Brazil INTRODUCTION Recently, a small pegmatite body in Minas Gerais has produced magnificent...many minerals, mainly phosphates, which are new to Brazil and very good specimens are still recoverable from...Janeiro, Brazil INTRODUCTION Near the town of Ara^uai, in the northern part of Minas Gerais, Brazil, exists...Thoreaulite was found here for the first time in Brazil. The Mineralogical Record, M arch-April, 1981 |  | | Report (issue) | | peri-Gondwanan terrane . . . . . . . . . 315 Juan Gómez Barreiro, José R. Martínez Catalán, Ricardo Arenas, Pedro...15001, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil ABSTRACT The southern Brazilian Shield comprises...of orogenic evolution can be observed throughout Brazil. The Brasiliano belts cannot be directly linked...Gondwana assembly. Precambrian units in southernmost Brazil (in the state of Rio Grande do Sul) record a tectonometamorphic...and age data with other Neoproterozoic belts in Brazil, southwestern Africa, and other Gondwana belts |  | | Journal (article/letter/editorial) | | isograd in Barrovian metapelitic rocks (Smith and Barreiro, 1990; Kingsbury et al., 1993). Monazite has long...Early-diagenetic REE-phosphate minerals (florencite, gorceixite, crandallite and xenotime) in marine sandstones:...estuaries. Aquat. Geochem. 1, 1–34. Smith, H.A., Barreiro, B., 1990. Monazite U–Pb dating of staurolite |  | | Journal (issue) | | witness. 2 FINE MINERALS AND GEMSTONES direct from Brazil OCEANSIDE GEM IMPORTS, INC. 426 M arion Street..................5 Brian Lloyd Locality— Minas Gerais, Brazil: A Response..............................very large and colourful am ethyst group from Brazil at $336 ( £ 140). This low price was m ore than...Alvaro Lucio Caiza Postal 1286 Belo Horizonte, Brazil s a mineral collector living in Belo H orizonte...orizonte, capital of the state of M inas G erais, Brazil, I could well understand the problem presented in the |  | | Journal (article/letter/editorial) | | Gmelinite-(Na) Goethite Gold native Goldfieldite Gorceixite Goyazite Graphite Gratonite Greenalite Greenockite...gold-bearing quartz veins in the southern Para State, Brazil (Angelica et al., 1997). Chromium muscovite named...conglomerate-hosted U deposits of the Randtype at Jacobina, Brazil (pers. com. P. Laznicka). Chromium-bearing garnet...Canada, Dore Lake, Australia, Campo Formoso, Bahia-Brazil) (Barnes and Francis, 1995; Leinonen, 1998; Kojonen...ultrabasic rocks such as in the Bacuri Complex-Amapa, Brazil (Spier and Filho, 2001). Further sites are found | | | Journal (article/letter/editorial) | | Gmelinite-(Na) Goethite Gold native Goldfieldite Gorceixite Goyazite Graphite Gratonite Greenalite Greenockite...gold-bearing quartz veins in the southern Para State, Brazil (Angelica et al., 1997). Chromium muscovite named...conglomerate-hosted U deposits of the Randtype at Jacobina, Brazil (pers. com. P. Laznicka). Chromium-bearing garnet...Canada, Dore Lake, Australia, Campo Formoso, Bahia-Brazil) (Barnes and Francis, 1995; Leinonen, 1998; Kojonen...ultrabasic rocks such as in the Bacuri Complex-Amapa, Brazil (Spier and Filho, 2001). Further sites are found |  | | Book | | .......................................... 167 Brazil..................................................particular of Africa, the U.S.S.R., Canada and Brazil, much of it inspired by the search for exploitable...Montreal area of Canada and for central Coais, Brazil. N11111ber and na111e Each occurrence has been...a n;:itional number, for example Jacupiranga is Brazil 88. This is followed by the preferred name of the...Croneis and Billings (1929) described breccias at Brazil Branch and Oppelo containing angular and rounded |  | | Report (issue) | | rare-earth elements, and antimony in China; niobium in Brazil; and platinum-group elements in South Africa and...chart showing niobium resources and reserves in Brazil, Canada, and the United States...................industrialization in large developing countries, such as Brazil, China, and India. In addition, the development...cobalt (Democratic Republic of the Congo), niobium (Brazil), and platinum (South Africa), are also considered...Zhayrem (Gauert, 2001). 80° Neuquen-Mendoza Araxá Camamu 0° Jameson Land basin Jbel Irhoud 45° |  | | Report (volume) | | face of apatite from the Golconda Mine, Minas Gerais Brazil. The three vicinal faces of the hillock exhibit...reported on the {100} faces of apatites from Minas Gerais, Brazil (Rakovan and Reeder 1994). The formation...of a fluorapatite from the Golconda Mine, Minas Gerais, Brazil. Image is ~666 μm vertical. [Modified after...of a fluorapatite from the Golconda Mine, Minas Gerais, Brazil. Image is ~1 mm across. [Used by permission...United States, Australia, South Africa, Sri Lanka, Brazil, India, Malagasy, and Canada. As shown in Table |  | | Book | | deposits (e.g. Cons. Lafaiete and Serra do Navio, Brazil; Section 23.3.5. and Fig. 23-10), are rare. One...in the Santa Catarina crystalline complex, S.E. Brazil (Morro da Fumaca) and elsewhere. Of the minor metallic...provinces (the Brito-Arctic Province, Atlantic coast of Brazil). Small plateau-basalt provinces are frequently...amygdaloidal basalts (as in the Alto Uruguai area, Brazil; Szubert et al., 1981) and interflow felsic conglomerates...various areas of the world (Table 31-2). In southern Brazil and Uruguay frequent showings are associated with |
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