Uranium Minerals
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Precipitación de uranio a partir de licores alcalinos
ABSTRACT In Argentina there is uranium with abundant organic matter and variety in quantity of sulfides and carbonates which act as cement or sealing joints. The latter minerals modify directly the choice of metal leaching process for the concentration of uranium. The most beneficial selected process turns out to be the alkaline leaching. Once this process h
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Inclusões fluidas nos minerais associados a mineralização uranífera da jazida do Engenho (anomalia 09), Província Uranífea de Lagoa Real, Bahia / Fluid Inclusions in minerals associated to uranium mineralization in Engenho Deposit (anomaly 09) Lagoa Real Uranium Province Bahia
The Engenho deposit (anomaly 09) is south-eastern from Cachoeira Mine (anomaly 13), in the northern part of the Province. The uranium mineralization is associated to albitites (over 70% of albite/oligoclase). Epidosites with uranium may also occur. The albitite main minerals are pyroxene, garnet, albite/oligoclase feldspar, amphibole and biotite. Pyroxene, g
Publicado em: 2009
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3. Datação química U-Th-Pb de minerais dos albitidos uraniferos da região de Lagoa Real (BA) por microssonda eletrônica
Different works in literature have used U-Th-Pb electron microprobe analyses for the chemical dating of U-Th-Pb system closing episodes in minerals. These episodes could have either metamorphic, thermal, and weathering nature or could be related to natural fission processes. Different thorium and uranium-bearing minerals which contain radiogenic lead have be
Publicado em: 2008
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4. Airborne geophysical and geological data applied to the selection of groudwater potential areas in crystalline rocks of Ceara, Brazil / Dados aerogeofisicos e geologicos aplicados a seleção de areas favoraveis para agua subterranea no dominio cristalino do Ceara, Brasil
The location of water well in Northeast Brazil is usually based on the interpretation of structural lineaments in aerial-photographs and electromagnetic and electrical resistivity ground geophysics surveys. However, the success of these techniques is variable, and the small coverage area is another limitation. This Thesis favors a different approach, the use
Publicado em: 2008
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5. "Um estudo sobre o desequilíbrio radioativo da série do urânio em amostras de solo" / A study on radioactive disequilibrium of the uranium series in soil samples.
The specific activities of 238U , 226Ra, 210Pb, 232Th and 40K were measured, and the 226Ra/238U and 210Pb/226Ra activity ratios were calculated for samples collected in a 2.10 m deep soil profile in a preserved area of the São Paulo Botanic Garden. The sampling site is covered by dense vegetation that, together with the upper soil layer, has not been distur
Publicado em: 2006
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6. Caracterização de piroxênios associados à mineralização uranífera da Jazida Cachoeira, Província Uranífera de Lagoa Real, Bahia
Este trabalho teve como objetivo contribuir para o conhecimento sobre a gênese da Jazida de Urânio Cachoeira (Lagoa Real, BA), caracterizando piroxênios (com ênfase nos associados à mineralização uranífera e que hospedam inclusões fluidas) e suas inclusões associadas. Em função das análises realizadas, foram descritos, de maneira geral, os passo
Publicado em: 2006
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7. Mineralogia e geoquímica supergênicas do urânio - Província Uranífera de Lagoa Real, Caetité - Bahia
X Ray Diffraction and Infrared Spectroscopy (FTIR) analysis reveal that the following uranyl hidroxisilicates mainly constitute the uranium secondary mineralogy from albitites of the Cachoeira and Laranjeiras uranium anomalies (Lagoa Real BA Brazil): β-Uranophane-Ca[(UO2)(SiO3OH)]2.5(H2O); Uranophane-Ca[(UO2)(SiO3OH)]2.5(H2O); Sklodowskite-Mg[(UO2)(SiO3
Publicado em: 2005
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8. AEROSOL CHARACTERIZATION IN A REGION WITH HIGH CONCENTRATION OF MINERAL SANDS. / CARACTERIZAÇÃO DE AEROSSÓIS EM UMA REGIÃO RICA EM AREIAS MONAZÍTICAS.
The main deposit of mineral sands in Brasil occur from the Rio Grande do Norte State to Rio de Janeiro State. The main commercial deposit is located in Buena, a village at São Francisco de Itabapoana, Rio de Janeiro State. In buena there is a plant that process minerals sands to obtain ilmenite, zirconite, rutile and monazite concentrates. This plant belong
Publicado em: 2003
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9. Avaliação da atenuação da vegetação da Mata Atlantica a radiação gama natural emitida pela superficie
Several natural alpha, beta and gamma radionuclides are known. Most of them occur in rock-forming minerals Potassium, uranium and thorium are the main natural gamma radiation producers. This radiation can be measured in the laboratory, field or from aircrafts. In this case, besides atmospheric attenuation, vegetation can absorb substantial amounts of radiati
Publicado em: 1997
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10. Study of soft alkaline using Landsat images of pools and residue with an emphasis on radioactive materials / Estudo Maciço alcalino de Poços de Caldas através de imagens Landsat com ênfase em mineralizacoes radioativas
Interpretações visuais e automáticas de imagens e fitas compatíveis com computador do sistema LANDSAT, integradas a dados geológicos, geofísicos, geocronológicos e altimetricos, permitiram definir os principais parâmetros condicionantes das mineralizacoes radioativas no Maciço Alcalino de Poços de Caldas, bem como delinear certos aspectos da evolu�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/12/1976
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11. Study of soft alkaline using Landsat images of pools and residue with an emphasis on radioactive materials / Estudo Maciço alcalino de Poços de Caldas através de imagens Landsat com ênfase em mineralizacoes radioativas
Interpretações visuais e automáticas de imagens e fitas compatíveis com computador do sistema LANDSAT, integradas a dados geológicos, geofísicos, geocronológicos e altimetricos, permitiram definir os principais parâmetros condicionantes das mineralizacoes radioativas no Maciço Alcalino de Poços de Caldas, bem como delinear certos aspectos da evolu�
Publicado em: 1976
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12. Composition and Diversity of Microbial Communities Recovered from Surrogate Minerals Incubated in an Acidic Uranium-Contaminated Aquifer
Our understanding of subsurface microbiology is hindered by the inaccessibility of this environment, particularly when the hydrogeologic medium is contaminated with toxic substances. In this study, surrogate geological media contained in a porous receptacle were incubated in a well within the saturated zone of a pristine region of an aquifer to capture popul
American Society for Microbiology.