 | | Journal (article/letter/editorial) | | INTRA-INTRUSIVE URANIUM DEPOSITS OF PO .COS DE CALDAS, BRAZIL F.E. DE V. LAPIDO LOUREIRO and R.C. DOS SANTOS...NUCLEBRAS, Rua Ga. Polidoro-Bota[ogo, Rio de Janeiro (Brazil) (Received February 24, 1986; revised and accepted...intra-intrusive uranium deposits of Poqos de Caldas, Brazil. In: J.W. Gabelman (Editor), Unconventional..., 3: 227-240. The alkaline complex of Poqos de Caldas is notable for its large size (1000 km 2), wide...The principal ore bodies are located at the Osamu Utsumi Mine, while smaller deposits of probable economic |  | | Journal (article/letter/editorial) | | in the Hydrogeochemistry and Microbiology of Acid Mine Waters D. Kirk Nordstrom a a U.S. Geological...in the Hydrogeochemistry and Microbiology of Acid Mine Waters, International Geology Review, 42:6, 499-515...in the Hydrogeochemistry and Microbiology of Acid Mine Waters D. KIRK NORDSTROM U.S. Geological Survey...to the hydrogeochemistry and microbiology of acid mine waters and associated tailings and waste-rock waters...microorganisms and their function and ecology in mine-waste environments. A broad diversity of green algae |  | | Journal (article/letter/editorial) | | within six natural analogue studies: Pocß os de Caldas, Cigar Lake, Maqarin, El Berrocal, Oklo and Palmottu...undertaken in the following systems: Pocß os de Caldas (Brazil), a Mesozoic volcanic ring-structure hosting...methodology of the BPM exercises, from the Pocß os de Caldas to the Oklo and Palmottu projects, has not varied...included in this revision: Pocßos de Caldas: SKB (Sweden), KTH (Sweden), PSI (Switzerland)...model the U/Fe association was done in Pocß os de Caldas by assuming the coprecipitation of U3O8 with Fe(OH)3 |  | Degueldre, Claude, Triay, Iñes, Kim, Jae-Il, Vilks, Peter, Laaksoharju, Marcus, Miekeley, Norbert (2000) Groundwater colloid properties: a global approach. Applied Geochemistry, 15 (7) 1043-1051 doi:10.1016/s0883-2927(99)00102-x | Journal (article/letter/editorial) | | Catholic University, GaÂvea, 22453, Rio de Janeiro, Brazil b Received 2 June 1999; accepted 16 September...chlorite, calcite, Fe oxy-hydroxides, with some pyrite. Their organic content is rather low. The Swiss...deep aquifers. The sites are the Menzenchwand U mine, the Bad SaÈckingen spring, the Zurzach thermal...local gel layers (Levy, 1992). Morro do Ferro, Brazil, is an altered (weathered) formation derived from...located in the Poc° os de Caldas alkaline caldera complex in the state of Minas Gerais. The rocks were predominantly |  | | Journal (article/letter/editorial) | | in the recovery of rare earth elements from acid mine drainage through pH neutralization M.L.B. Moraes...in the recovery of rare earth elements from acid mine drainage through pH neutralization, Applied Geochemistry...the recovery of rare earth 2 elements from acid mine drainage through pH 3 neutralization 4 MORAES...ensure sustainable and affordable 20 supplies. Acid Mine Drainage (AMD) besides being one of the major 21... 29 The approach proposed herein employed acid mine water and 30 sediment sampling, ICP-OES, XRD, |  | | Journal (article/letter/editorial) | | to the speciation of water analyses from Spain, Brazil, USA, and Canada. The main ions that might affect...Samples GW-47 and GW-58 are from the Osamu Utsumi uranium mine in Brazil ŽMiekeley et al., 1992.. Samples...Geology 165 (2000) 167–180 Samples from the Osamu Utsumi mine are acidic groundwaters, collected in the...membranes with nominal pore size of 0.4– 0.45 mm ŽOsamu-Utsumi and Colour Lake. or 0.1 mm ŽArroyo del Val and...shales and siltstones except for samples from Osamu Utsumi mine Žphonolitic bedrock. and San Juan Mountains |  | Bruno, J, Duro, L, de Pablo, J, Casas, I, Ayora, C, Delgado, J, Gimeno, M.J, Peña, J, Linklater, C, Pérez del Villar, L, Gómez, P (1998) Estimation of the concentrations of trace metals in natural systems. Chemical Geology, 151 (1) 277-291 doi:10.1016/s0009-2541(98)00085-0 | Journal (article/letter/editorial) | | approaches to El Berrocal žSpain / and Poços de Caldas žBrazil / J. Bruno a,) , L. Duro a , J. de Pablo...methodology to the El Berrocal ŽSpain. and Poços de Caldas ŽBrazil. sites. Trace metals under investigation...oxyhydroxides Žboth in El Berrocal and in Poços de Caldas., Ž2. the interaction of barium and manganese with...association between strontium and fluorite in Poços de Caldas. In most cases, the results were in good agreement...comprising quartz, sphalerite, pyrite and chalcopyrite as well as pitchblende, pyrite, carbonates and barite |  | | Report (chapter) | | inclusions (as proposed for groundwaters at the Stripa Mine, Sweden, Nordstrom et al. 1989b); halogen-bearing...associated with pyrite oxidation at the Osamu Utsumi uranium mine, Poqos de Caldas, Brazil. For the oxidation...Eq. (14): F{'@O2 (aq) } Vf = LJO2(aq),pyrite{~pyrite } --1 /pyrite " (16) Lichtner & Waber (1992) assumed...{~bo2(aq)} ~ ~O2(aq) = KnlPo2(g), and {q~pyrite } = q~0 . pyrite (17) where K/_/ denotes the Henry's law...Po2(g) refers to O2(g) partial pressure a n d ~pyrite represents pyrite's volume fraction in the unoxidized |  | | Journal (article/letter/editorial) | | by alkaline volcanic rock in the Poços de Caldas, Brazil. One rare study of a granite-hosted uranium...the production of illite, kaolinite, chlorite, pyrite, fine-grained quartz, hematite, fluorite and calcite...Metallic minerals associated with pitchblende are: pyrite, chalcopyrite, galena, sphalerite and hematite...Testing of geochemical models in the Poços de Caldas analogue study. Nagra Tech. Rep., NTB 90-29rSKB...Shea, M.E., Smellie, J.A.T., 1992b. The Poços De Caldas: an introduction and a summary of its implications |  | | Journal (article/letter/editorial) | | STUDIES: GEOLOGY AND MINERALOGY OF MORRO DO FERRO, BRAZIL P.M.C. B A R R E T T O a n d K. F U J I M O R I...Nuclear Energy Commission (CNEN), Rio de Janeiro (Brazil) (Accepted for publication January 15, 1986) Abstract...studies: Geology and mineralogy of Morro do Ferro, Brazil. In: N.A. Chapman and J.A.T. Smellie (Guest-Editors)...time. The Morro do Ferro in the State of Minas Gerais, Brazil, could be a suitable analogue for certain...association with other research institutions in Brazil. This joint project entitled "Mobility of Thorium |  | | Book | | ........................................... 25 Brazil .................................................uranium if higher prices justify reprocessing the mine tailings to recover some of the uranium that was...wastewater during environmental reclamation at a mine that has ceased production. The following statistical...Canada South Africa Namibia Russian Federation Niger Brazil Uzbekistan Ukraine Mongolia $40/kgU < $80/ kgU...operations. 9 In Central and South America, Brazil was the only country producing in 2001 and 2002 |  | | Journal (article/letter/editorial) | | mica, chlorite and quartz; accessory minerals are pyrite, galena, apatite, ilmenite, monazite, xenotime...free of Pb. However, intergrowths of galena and pyrite are observed around the partially decomposed crystals...xenotime, zircon, apatite, columbite, pyrochlore, pyrite, galena, sphalerite and some minerals such as bastnaesite...rims: the source of Pb and S was primary galena and pyrite, and the source of the 90 REE could be bastnaesite...is of interest that an intergrowth of galena and pyrite sometimes occurs next to the 92 TRACE ELEMENTS |  | | Journal (article/letter/editorial) | | dissolution, coupling a one-dimensional model of pyrite weathering to that of albite transformation to...reactive-transport model that couples simulations of pyrite weathering and albite transformation to kaolinite...reflected in simulated depth profiles of albite and pyrite in the coupled model. Using the model, 2 Y....induced by CO2 with and without the presence of pyrite, which is difficult to examine through field observations.... The terms rpy and rab represent the rates of pyrite oxidation by O2 and albite transformation to kaolinite |  | | Journal (article/letter/editorial) | | connection to Iron chemistry in a former uranium mine — Lake Tranebärssjön F. EDBERG1*, A.F. ANDERSSON2...Centro Hospitalar das Caldas da Rainha, R. Diário de Notícias, 2500-176 Caldas da Rainha, Portugal The...Conference Abstracts 2010 1 A261 The hematite-pyrite tandem cell: Avenue to understanding Mars photochemical...ferric coatings are an expected part of pyrite oxidation. Pyrite has a smaller bandgap than hematite, and...Thus, we examined the properties of a hematite-pyrite tandem cell from the point of view of water oxidation |  | | Report (issue) | | engineered. Once an ore deposit is discovered, a mine is developed and U extracted by a variety of mining...(Australia) Pervomayskoye (Ukraine), Lagoa Real (Brazil), Valhalla (Australia) Pribram , Jachymov (Czech...examples of this deposit type are Lagoa Real in Brazil, Zheltye Vody deposit in Ukraine and Valhalla in...basement (IAEA 1987). The U occurs in seams rich in pyrite and organic matter. The grade may be as low as...gold mining. In Namibia, the large Rössing open cut mine has been in operation since 1976, and currently |  | | Journal (article/letter/editorial) | | elements in Cuporphyry mine tailings in the semiarid climate conditions of Sarcheshmeh mine in southeastern...elements in Cu-porphyry mine tailings in the semiarid climate conditions of Sarcheshmeh mine in southeastern...Elements in Cuporphyry Mine Tailings in the Semiarid Climate Conditions of Sarcheshmeh Mine in Southeastern...khorasani@uk.ac.ir IP T a US Abstract Sarcheshmeh mine is one of the largest Oligo-Miocene porphyry Cu...IP T substitution. CR Keywords: Sarcheshmeh mine tailings; REEs; semiarid climate; ionic potential |  | | Journal (issue) | | study conducted in and around one of the chromite mine of the valley reveals that the concentration of...varying between 0.02 mg/l and (Cr 0.12 mg/l in mine effluents and 0.03 Central Mining Research Institute... the water samples of ground and surface water, mine effluents and R. K. Tiwary which is in the downstream...clearly shows that the soil lying in the vicinity of mine waste dump shows highest concentration of Cr*®....areas. Keywords Chromite Hexavalent chromium mine waste - Leachate - Groundwater modeling Contaminant |  | | Journal (article/letter/editorial) | | partitioning between hydrous ferric oxides and acid mine water during iron oxidation Philip L. Verplancka...precipitates as hydrous Fe (III) oxides in acid mine waters. This study examines the effect of Fe precipitation...the rare earth element (REE) geochemistry of acid mine waters to determine the pH range over which REEs...complement these field studies, a suite of six acid mine waters with a pH range from 1.6 to 6.1 were collected...involving contaminant reactions and transport at complex mine waste sites, and enhance the interpretation of water–rock |  | | Journal (article/letter/editorial) | | to soils and runoff to water systems, mine tailings and acid mine drainage, and soil and groundwater quality...modified after van Staal et al. (2001). Lake), pyrite, sphalerite, galena, and chalcopyrite. Both deposits...lesser abundance. Accessory phases include albite, pyrite, and Fe oxides (Table 1). Oxides of Fe and Al were...Zn sulfides or sulfates. XRD data suggest that pyrite is the FIG. 3. Secondary SEM images of suspended...from the Osamu Utsumi mine and Morro do Ferro analogue study sites, Poços de Caldas, Brazil. J. Geochem |  | | Journal (article/letter/editorial) | | Micron accessory minerals such as monazite, zircon, pyrite, marcasite, Fe oxides and Ti oxides have also been...opaque minerals, such as hematite, goethite and pyrite, and transparent resistant minerals, such as tourmaline... such as monazite, rutile, zircon, tourmaline, pyrite and marcasite, as well as organic matter, were...The Macuapanim Island point bar, Solimões River, Brazil. J. Sediment. Petrol. 60, 827 – 842. Johnsson,...from the Osamu Utsumi mine and Morro do Ferro analogue study sites, Poços de Caldas, Brazil. J. Geochim |  | Gammons, Christopher H, Wood, Scott A, Jonas, James P, Madison, James P (2003) Geochemistry of the rare-earth elements and uranium in the acidic Berkeley Pit lake, Butte, Montana. Chemical Geology, 198 (3) 269-288 doi:10.1016/s0009-2541(03)00034-2 | Journal (article/letter/editorial) | | first REE data reported from a flooded open-pit mine. The results are discussed and placed within the...(2003) 269–288 bedrock and flooded underground mine workings (Duaime et al., 1998; Metesh and Duaime...gallons (>1.11 1011 l) of acidic and metal-rich mine water. The aqueous geochemistry of the Berkeley...phosphorus (Jonas, 2000). In the first 12 years of mine flooding, a large acidic spring—known as the Horseshoe...inputs, water –rock interaction along the submerged mine walls, and internal metal cycling (Gammons et al |  | | Report (issue) | | literature. An example was with the Osamu Utsumi mine in Brazil. This deposit has been reported in the...the literature as Pocos de Caldas, Minas de Caldas and Cereado to name a few synonyms. Hopefully, most...design a similar database model for the CNEN in Brazil in 1983. Since that time, India has also developed...producer. Mine A mine is a deposit from which ore is currently being recovered. Depleted Mine A depleted...depleted mine is, a mine-out or depleted ore deposit with insufficient Reasonably Assured Resources recoverable |  | | Journal (article/letter/editorial) | | systems where massive metal sulfide deposits, such as pyrite, are exposed to oxygenated waters, sulfate concentrations...systems include acidic, sulfate-rich waters draining mine tailings (Miekeley et al., 1992), geothermal springs...from the Osamu Utsumi mine and Morro do Ferro analogue study sites, Poços de Caldas, Brazil. J. Geochem |  | | Journal (article/letter/editorial) | | bornite. The second example includes magnetite and pyrite in the protore in addition to chalcopyrite with...Ii? CHALCOPYRITE BORNITE CHALCOCITE COVELLITE PYRITE MAGNETITE FER~HYD~TE -244.10 -526.0 -141.20 -115...3.59 CHALCOPYRITE BORNITE CWALCOCITE COVELLITE PYRITE MAGNETITE FERRIHYDRITE -246.90 -528.80 -141.20...0.78 CHALCOPY~TE BORNITE CHALCOCITE COVELLITE PYRITE MAGNETITE FERRIHYDRITE -199.0 -424.70 -113.0 -92...~HAL~O~ITE COVELLITE PYRITE MAGNETITE FERRIHYDRITE CHALCOPYRITE BORNITE CHALCOCITE COVELLITE PYRITE ~~AGN~TITE |  | | Report (volume) | | based on considerations that extend far beyond the mine itself, in some instances relating to the overall...subject, as in a scale model of the workings of a mine, to a unifying concept that explains or describes...government believed might someday be economic ta mine. Stratiform deposits of large areal extent, such...chalcopyrite + cubanite + millerite + vallerite + pyrite bornite + gersdorffite + sperrylite + PGE alloys...Types Dunitic Ni. DEPOSIT DESCRIPTION Mineralogy Pyrite + pyrrhotite + chalcopyrite + pentlandite, by-product |
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