 | | 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...croperthitic orth oclase, lesser andesine, aegirine-augite, a rfvedsonitic amphi bole, biotite and m |  | | 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 |  | | Journal (article/letter/editorial) | | by the development of Na- and Kamphiboles, aegirine-augite, K-feldspar, albite, perthite, mesoperthite...Carbonatite complex 1 2 3 Amba Dongar Otjisazu Araxá Total (km2) 6.7 11.9 21.2 km2 3.2 0.9 7.0 % 47...Fe 3+ ±Ca ±Al Na K Na and K amphibole Aegirine-augite K-feldspar Mesoperthite Antiperthite Albite...carbonatite contact, as recorded by disappearance of aegirine and Na-amphibole over the distance of approximately...Paleoproterozoic collision zone of the Borborema province, NE Brazil (EJ dos Santos et al. 2013; RV Santos et al. 2013); |  | 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) | | Na2O+K2O>Al2O3) and as such may contain sodic pyroxene (e.g. aegirine) and amphibole (arfvedsonite and riebeckite)....host dolomite marble to fluorite, apatite, aegirine-augite, riebeckite, arfvedsonite amphibole and barite...banding (Fig. 3A). The banding is cut by veins of aegirine, riebeckite, apatite, calcite and barite associated...(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 |  | | 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 |  | Macdonald, R., Bagiński, B., Leat, P.T., White, J.C., Dzierżanowski, P. (2011) Mineral stability in peralkaline silicic rocks: Information from trachytes of the Menengai volcano, Kenya. Lithos, 125 (1) 553-568 doi:10.1016/j.lithos.2011.03.011 | Journal (article/letter/editorial) | | Fig. 7), although the phenocrysts in RJK10b are augite (Table 3). The degree of zonation is variable but...reduce the peralkalinity of residual melts. Aegirine-augite occurs as phenocryst rims in K1A34/1 (Ti 0...are hedenbergites or sodian hedenbergites. Aegirine-augite phenocrysts (as opposed to the rims of zoned...Menengai, all with PI N 1.5. The occurrence of aegirine-augite is not related in any simple way to a compositional...D'Entrecasteaux Islands, Smith (1976). just below, FMQ. Aegirine is never found as a phenocryst phase, although |  | Black, Stuart, Macdonald, Ray, Barreiro, Barbara A., Dunkley, Peter N., Smith, Martin (1998) Open system alkaline magmatism in northern Kenya: evidence from U-series disequilibria and radiogenic isotopes. Contributions to Mineralogy and Petrology, 131 (4) 364-378 doi:10.1007/s004100050398 | Journal (article/letter/editorial) | | 1998 Stuart Black á Ray Macdonald á Barbara A. Barreiro Peter N. Dunkley á Martin Smith Open system alkaline...931 0279 E-mail: s.black@reading.ac.uk 1 B.A. Barreiro NERC Isotope Geoscience Laboratory, Keyworth,...and a magnetic separate containing oxides, aegirine-augite, and fayalite. The ages were measured by the...degrees of fractionation along olivine-plagioclase-augite cotectics. The nepheline-normative character of |  | | Journal (article/letter/editorial) | | Clinopyroxene of basalts and hawaiites is mostly augite, and typically has normal zoning with Fe-rich (and...pantellerites and comendites is Fe-augite (hedenbergite) or, more rarely, aegirine-augite, and is characterized by...between rim and core with aegirineaugite rims and Fe-augite cores. Na2O reaches values as high as 5 wt.%, but...15.1 2.9 9.1 1.4 9.1 1.4 16.4 7.6 18.0 12.4 2.7 augite structure while it becomes more important for the...assemblage. Moreover, anhydrous conditions inhibit aegirine and Na-rich amphibole crystallization. However |  | Tommasini, S., Manetti, P., Innocenti, F., Abebe, T., Sintoni, M., Conticelli, S. (2005) The Ethiopian subcontinental mantle domains: geochemical evidence from Cenozoic mafic lavas. Mineralogy and Petrology, 84 (3) 259-281 doi:10.1007/s00710-005-0081-9 | Journal (article/letter/editorial) | | phenocryst assemblage is dominated by olivine þ Ti-augite þ plagioclase opaque minerals. In contrast the...Badda and Nekemt Volcanoes are characterised by Ti-augite þ olivine nepheline. Comendites, pantellerites...porphyritic textures with alkali feldspar þ aegirine augite quartz aenigmatite alkaline amphibole...feldspars (mainly anorthoclase) þ nepheline þ aegirine þ alkaline amphibole opaques aenigmatite ...N, Macdonald R, Fitton FG, George R, Smith M, Barreiro B (2000) Two mantle plumes beneath the East African |  | | Book (volume) | | Universidad de Oviedo, Oviedo, Spain J. Gómez Barreiro Departamento de Geología, Universidad de Salamanca... Dias da Silva, E. González-Clavijo, J. Gómez Barreiro, and A. López-Carmona 2.1 Introduction . . . ...González-Clavijo, A. Díez-Montes, and J. Gómez-Barreiro 3.1 Introduction . . . . . . . . . . . . . . ... . . . . . . J. R. Martínez Catalán, J. Gómez Barreiro, Í. Dias da Silva, M. Chichorro, A. López-Carmona.... . . . . A. Azor, Í. Dias da Silva, J. Gómez Barreiro, E. González-Clavijo, J. R. Martínez Catalán, |  | | 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 |  | | Book | | mainly consisting of intermediate plagioclase + augite + opaques’) into an informative, appropriate name...minerals – such as quartz, olivine, nepheline, aegirine–augite – provides immediate, key clues about the melt’s...high-Ca pyroxene, usually the variety known as augite (Box 2.1). Basalts may contain low-Ca pyroxene...precise definition of basalt should therefore specify augite (or high-Ca pyroxene) as the essential pyroxene...of the essential minerals calcic plagioclase and augite. How does one determine under the microscope whether |  | Clark, Alan H., Farrar, Edward, Kontak, Daniel J., Langridge, Robert J., Arenas F., Mario J., France, Lynne J., McBride, Sandra L., Woodman, Priscilla L., Wasteneys, Hardolph A., Sandeman, Hamish A., Archibald, Douglas A. (1990) Geologic and geochronologic constraints on the metallogenic evolution of the Andes of southeastern Peru. Economic Geology, 85 (7) 1520-1583 doi:10.2113/gsecongeo.85.7.1520 | Journal (article/letter/editorial) | | amphibole(barkevikite andhornblende)-pyroxene (aegirine-augite) syenites,and have compositions largely in...Bundschau, v. 67, p. 253270. Arenas, M. J., 1977, Minas Santa Barbara, reservasde mineral, posibilidades...AmericaBull., v. 81, p. 1539-1546. 71, p. 79-90. Barreiro,B. A., andClark, A. H., 1984, Leadisotopicevidence...Cosmochim. Acta,v. 46, p. 18111820. Harmon, R. S., Barreiro, B. A., Moorbath, S., Hoefs, J., Francis, P....HarMcGraw-Hill Book Co., 930 p. mon, R. S., and Barreiro, B. A., eds., Andean magmatism: Lo, C.-H., and |  | | Report (chapter) | | rare earth element (REE) minerals (e.g. Smith & Barreiro 1990). When seen in thin-section in apparent equilibrium...intrusion in the region except for nepheline + aegirine-augite syenites. Spectacular large pegmatites, for...19–52, https://doi.org/10.1144/M48.2 SMITH, H.A. & BARREIRO, B. 1990. Monazite U–Pb dating of staurolite grade |  | | Book | | of about 2000), with production being moved to Brazil. The remainder of southern and central England...meteorites include: albite (and also oligoclase). augite. chlorapatite, chromite, cohenite [(Fe,Ni.Co),C]t... acmite A synonym of aegirine. The term was reserved for a variety of aegirine, but is now used for the...Hawkes et al. 1975), is actually a calcium-poor aegirine containing significant amounts of niobium and...Braithwaite, contains parvo-actinolite associated with augite, chromite, magnesiohornblende, olivine, pargasite |  | | Book | | deposited in the sedimentary basin of Curitiba, Brazil (Cesbron et al. 1979) is still problematical considering...REE patterns of lanthanide-(Nd) frorn Curitiba, Brazil (a) and lanthanide-(Ce) frorn Britannia Mine, UK...identified from only a single oeeurrenee at Alto do Giz, Brazil, where it forms as a replaeement produet ofmierolite...established its presence in the Alto do Giz pegmatite in Brazil. So far, alumotantite shows only limited Substitution...from 0.2 to 3.98 wt% in senaite from Colorado and Brazil (Foord et al. 1984).1t is conceivable that minor |  | Stevens, John G., Khasanov, Airat M., Miller, J. W., Pollak, Herman, Li, Zhe - Eds. (2002) Mössbauer Mineral Handbook (2nd ed.) Mössbauer Effect Data Center, Asheville, NC. | Book (edition) | | 217-25(1972) Mossbauer Resonance of Arfvedsonite and Aegirine-Augute from the Joan Lake Agpaitic Complex, Labrador...Pelitic Rock from the Bambui Group, State of Minas Gerais, Brazil (In German) (Chem.Abstr.119(8):76632d) A...M.C.Boiron, M.Cathelineau, and F.E.Wagner, in "Brazil Gold '91:The Economics, Geology, Geochemistry and...Microcrystalline Goethite and Humic Acid in Some Oxisols from Brazil J.Friedl, F.E.Wagner, J.A.Sawicki, D.C.Harris,...brown latosols from the Rio Grande Do Sul state, Brazil. (In Portuguese) (Chem.Abstr.123:318854) P.Kong |  | | Journal (volume) | | Myanmar Emeralds from the Piteiras mine, Minas Gerais State, Brazil: genetic implications from fluid inclusion...Piteiras mine in Itabira is located in the Minas Gerais State, Brazil and produces gem quality emeralds. Ultramafic...property. “Gem-quality” alexandrite specimens from Brazil, India, Madagascar, Russia, Sri Lanka, and Tanzania...sources. Alexandrite samples from the Hematita mines (Brazil) have typically high Sn (up to 2294 ppm) concentrations...showing LA-ICP-MS data [ppm] for alexandrites from Brazil (BZ), Madagascar (MAD), Russia, Sri Lanka, and |  | | Report (issue) | | rrosilite) >85–90 mol%. They are classified as augite, with ~34–44 mol% wollastonite and ~7–15 mol% ferrosilite... R., Fitton, J.G., George, R., Smith, R., and Barreiro, B., 2000, Two mantle plumes beneath the East... R., Fitton, J.G., George, R., Smith, M., and Barreiro, B., 2000, Two mantle plumes beneath East African... R., Fitton, J.G., George, R., Smith, M., and Barreiro, B., 2000, Two mantle plumes beneath the East...microcrysts. However, some flows contain rare aegirine phenocrysts (Downie and Wilkinson, 1972). The |  | | Book | | and amphiboles, growths of tri-octahedral micas, aegirine and riebeckite, as well as a series of F- or B-rich...textural and colour changes, due to growths of aegirine and arfvedsonite, and replacement of K in perthite...preceded by Na-K fenitisation with the production of aegirine-bearing rocks (Le Bas 1977). Prins (1981) studied...characterised by the replacement of quartz by aegirine-augite and Na-amphibole along fractures. The syenite...re-crystallised texture and consists of orthoclase and aegirine-augite. The main changes involve the enrichment of |  | Kogel, Jessica Elzea, Trivedi, Nikhil C., Barker, James M., Krukowski, Stanley T. - Eds. (2006) Industrial Minerals and Rocks (7th ed.) Society for Mining, Metallurgy, and Exploration, Inc., Littleton, CO. | Book (edition) | | concentrat ed in southern Africa, the Siberian Platform, Brazil, and Western Australia. Ages range from Precambrian...associated with pegmatites in locations such as Brazil, the former U.S.S.R., and western Canada, pro duction...Venezuela, Guyana, Surinam, Guiana, and parts of Brazil and Colombia) • Northern Brazilian Shield Province...coming from Australia, Guinea, Jamaica, China, and Brazil. Nonmetallurgical grades used for refractories...specific deposits in China, Australia, Guinea, Brazil, Guyana, and Suriname. Fluorspar Manganese Lithium |  | | Report (issue) | | CARBONATE ROCKS FROM THE SAO FRANCISCO CRATON, BRAZIL. BABINSKI. M., Instituto de Geociencias, Universidade...Universidade de Sao Paulo, SP, 05508-900, Brazil, and VAN SCHMUS, W.R., Geology Department, University of...performed on Paleoproterozoic carbonate rocks from the Minas Supergroup, Sao Francisco Craton. Undeformed carbonates...method was successfully applied to Paleoproterozoic Minas Supergroup carbonates. However, this method did...CONTROLS ON VOLCANISM IN THE NORTHERN KENYA RIFT BARREIRO Barbara, NERC Isotope Geosciences Laboratory, |  | | Report (issue) | | metamorphism (M/}\) characterized by garnet + hornblende + augite (~14 mol% jadeite) + rutile + quartz. Both peak...sodic amphibole (Na-amp), phengite (Phe), and aegirine (Ae) throughout this paper. The term “hornblende”...jadeites in the JEC are nearly binary jadeite-aegirine compositions of jd, ,,aug, ae, ,,; the jd component...Lws-blueschist EG x 10f -Quad-« ol * Ne \ aegirine-augite — PEC aegrine | 30 o -@ CGA \ x nee...Chlorite Quartz Rutile Titanite Garnet Omphacite Augite (exs.) Lawsonite Pumpellyite Clinozoisite Chlorite |  | | Report (volume) | | age for the foliated Kinsman Quartz Monzonite (Barreiro and Aleinikoff, 1985). The postkinematic Sunapee...crustal movements: Vermont Geology. v. 1, p. 5-11. Barreiro, B., and Aleinikoff, J.N., 1985, Sm-Nd and U-Pb...(1899, p. 222-223) described an east-westtrending augite-camptonite dike in the bed of Lewis Brook, west...breccia dikes ~ Xenolith-rich breccia EEill Augite syenite ~ Socialite-bearing nepheline syenite...breccia dikes Xenolith-rich breccia 1 KILOMETER Augite syenite ~ Sodalite-bearing nepheline syenite |  | | Report (volume) | | Axinite from Tabua Lake, Lagoa Real District, Brazil. An Acad Bras Cienc 55:93-103 Bahia, Chao GY...Anales del Ministerio de Agricultura, Dir Gen de Minas, Geol, e Hidrologia, Pub no 89, Buenos Aires, 57...del Primer Congreso Panamericano del Ingeniero de Minas y Geologia 4: 1665-1667 Libbey FW (1985) Boron in...elsewhere in the famous pegmatite gem fields of Brazil and the Hindu Kush, tourmaline has nucleated exclusivel...1993). The occurrence of reedmergnerite plus aegirine at the Dara-i-Pioz locality (Grew et al., 1993) |
|
