Ilmenite
Mostrando 13-22 de 22 artigos, teses e dissertações.
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13. Geology of high pressure granulites of Carvalhos Klippe, southern Brasília Belt / Geologia dos granulitos de alta pressão da Klippe Carvalhos, extensão sul da Faixa Brasília
At the top of Andrelândia Nappes System, southern border of São Francisco craton, occur nappes formed dominantly by metasedimentary rocks with subordinated metabasics and metaultramafics which record metamorphism of high pressure granulite facies in the Ediacaran. These nappes are Três Pontas - Varginha, Pouso Alto and Klippen Airuoca and Carvalhos. In Ca
Publicado em: 2009
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14. Extração líquido-líquido de ferro(III) e titânio(IV) pelo ácido bis-(2-etil-hexil) fosfórico (D2EHPA) em meio de ácido sulfúrico
This work presents a study on the separation of Fe(III) and Ti(IV) from sulfuric acid leaching solutions of ilmenite (FeTiO3) using liquid-liquid extraction with D2EHPA in n-dodecane as extracting agent. The distribution coefficients (K D) of the elements related to free acidity and concentration of Fe(III) and Ti(IV) were determined. Free acidity was change
Química Nova. Publicado em: 2008
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15. Petrography and mineral chemisty from Indaiá I and Indaiá II intrusions, western Minas Gerais State / Petrografia e química mineral das intrusões Indaiá I e Indaiá II, oeste do Estado de Minas Gerais
An integrated petrographic and mineral chemistry study has been carried out on ultramafic, potassic to ultrapotassic and silica-undersaturated rocks of kimberlitic affinity of the Indaiá I and Indaiá II intrusions, Western Minas Gerais State, Brazil. These rocks outcrop at the Alto Paranaíba Igneous Province (PIAP), within a N30W-trending, elongated area,
Publicado em: 2008
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16. Evolução magmática do Sill de Limeira: petrografia e geoquímica / Magmatica evolution of the Limeira Sill: petrography and chemistry
The Limeira Sill exhibits a wide and continuous compositional variation, between basalt at the chilled margins and coarse-grained quartz monzodiorite in the innermost part currently exposed in the quarried where it is exploited. Below the top basalt border there is a layer rich in amygdales filled by hydrothermal minerals, followed downwards by the appearanc
Publicado em: 2008
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17. Geologia, geometalurgia, controles e gênese dos depósitos de fósforo, terras raras e titânio do complexo carbonatítico Catalão i , GO
This work describes the geological and geometallurgical characteristics of the phosphate, titanium, niobium and rare-earth elements deposits in the northeast part of the Catalão I carbonatite complex, Central Brazil. The mineralization controls were determined for magmatic, metasomatic and weathering processes. The ore types were defined on the basis of geo
Publicado em: 2008
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18. Petrologia e metalogenia do Depósito de Cobre Bom Jardim de Goiás (GO)
The Bom Jardim de Goiás Deposit is located at western Goiás State, on the western border of the Arenópolis magmatic arc. A reserve of 4,575,660 t, containing 0,92% Cu, was estimated by Serviço Geológico do Brasil (CPRM). The country rocks comprise vulcanoclastic rocks assigned to the Córrego da Aldeia formation from the Bom Jardim de Goiás Group, with
Publicado em: 2007
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19. 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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20. Spectroscopies and X-Ray Diffraction Applied to the Soils Mineralogical Characterization / Uso de espectroscopias e difração de raios X aplicadas à caracterização mineralógica de solos
The mineralogical constitution of three soils (Eutrophic Structured Dusky-¬Red Earth from the region of Piracicaba, São Paulo, Cambisol and Dark-Red Latosol both from the region Ponta Grossa, Paraná) was studied with the intention of contributing to the areas of physics applied to soil, agronomy and geology. The X-Ray Diffraction analysis, were done with
Publicado em: 2001
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21. Caracterização de minerais pesados ao longo do Rio Piranhas-Açu/RN distribuição e proveniência
This dissertation deals with the characterization, distribution and provenience of heavy minerals along the Piranhas-Açu River, from the City of Parelhas (Seridó River) to your mouth at the City of Macau-RN. Many heavy minerals species were recorded in this study: clinoamphibole, epidote (including zoisite), garnet, sillimanite, tourmaline, staurolite, and
Publicado em: 1999
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22. Petrologia dos granitóides brasilianos associados à zona de cisalhamento Remígio-Pocinhos(PB)
The Brasiliano Cycle in the Seridó Belt (NE Brazil) is regarded mostly as a crustal reworking event, characterized by transcurrent or transpressional shear zones which operated under high temperature and low pressure conditions. In the eastern domain of this belt- the so-called São José de Campestre Massif (SJCM), a transtensional deformation regime is ev
Publicado em: 1998