Illite
Mostrando 13-24 de 28 artigos, teses e dissertações.
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13. Padrões diagenéticos em arenitos de sistemas de Sabk ha costeiros-eólicos: um estudo comparativo dos reservatórios Juruá da área de Urucu, Bacia de Solimões, AM
Coastal-eolian sabkha sandstones from different ages and basins show similar diagenetic patterns, which understanding is important for their evaluation as geochemical systems and as hydrocarbon reservoirs. The Carboniferous sandstones of the Juruá Formation (Solimões Basin) are one of the most important gas reservoirs of Brazil. The sandstones and interbed
Publicado em: 2010
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14. La Formación Corumbataí y su importancia en la industria cerámica del estado de São Paulo - Brasil
The rapid development of the ceramic pole of Santa Gertrudes (São Paulo-Brazil) during the 90's was caused by the privileged localization of the raw material in conjunction with the technological development, large reserves, easy access of the highways helping the draining of the products as well as the proximity of the great consuming centers. This develop
Matéria (Rio de Janeiro). Publicado em: 07/04/2009
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15. Nutrientes (K, P, Ca, Na, Mg e Fe) em sedimentos (solos aluviais) e cultivares (feijão e milho) de praias e barrancos de rios de água branca: a bacia do purus no estado do Acre, Brasil
The present research highlights the macronutrient abundance in the sediments of beaches and cliffs and cultivates in the river Purus and flowing, southwest of Amazon. The concentrations found in leaves and bean seeds and corn leaves reflect the mineralogical and chemical nature of those rich sediments in K2O and Na2O, which are formed by smectite, illite and
Química Nova. Publicado em: 2009
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16. Gênese, distribuição e caracterização dos espongilitos do noroeste de Minas Gerais
This study relates to the spongillites deposits that occurs in shallow ponds on a karstic planation surface developed on rocks of the Neoproterozoic São Francisco Supergroup. Cenozoic siliciclastics sediments are related to this surface and Mesozoic Areado Group rocks occur adjacent to the deposits. Field studies associated with the analysis of multispectra
Publicado em: 2009
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17. Gênese, classificação e mapeamento de solos desenvolvidos de rochas pelíticas em áreas cultivadas com eucalipto em Minas Gerais / Genesis, classification and mapping of soils developed from pellitic rocks in areas cultivated with eucalyptus in Minas Gerais
Because the demand for arable areas has turned very intense in the last years, soils then considered as not appropriate to agricultural use are now being revalued and studied in order to use them for forest plantings, to example of Cambisols developed from pellitic rocks of Bambui Group. In reason of the expressiveness of these soils, usually associated Lato
Publicado em: 2008
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18. Sustentabilidad del riego complementario en suelos Udipsament Típico y Hapludol Entico de Argentina
The complementary irrigation with high level of sodium in water leads to dispersive processes that deteriorate the porous space and therefore, other related properties. This could take place with low to medium levels of SAR of water, in coarse soil in which the illite is predominant in the clay fraction. It is hypothesized that irrigation may cause dispersiv
Revista Brasileira de Engenharia Agrícola e Ambiental. Publicado em: 2006-09
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19. Soil mineralogy and sedimentary environment in mangroves of São Paulo State / Mineralogia de solos e ambientes de sedimentação em manguezais do Estado de São Paulo
Mangroves are formed by groups of trees and shrubs that develop in the intertidal zone of tropical regions. This ecosystem to establish in the interface of both marine and continental environment, present its formation related to the sea-level fluctuations during the quaternary period, where the terrigenous and marine sediments are deposited in rivers valley
Publicado em: 2006
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20. Thermal decomposition of illite
The effect of heat treatment on illite in air at temperatures ranging from 750 to 1150 °C was studied using the Mössbauer effect in 57Fe. The dependence of the Mössbauer parameters and relative percentage of the radiation absorption area was measured as a function of the firing temperature. The onset of thermal structural decomposition occurred at 800 °C
Materials Research. Publicado em: 2004-06
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21. Influência da calcinação sobre a remoção de ferro da caulinita e ilita e seus efeitos sobre a acidez
Samples of natural clay composed by kaolinite, illite, goethite and quartz, were calcinated and submitted to lixiviation with citrate and chloridric acid in order to remove iron. Investigation due to extraction consequences was carried cut by analyzing its acid properties using ammonia gas as probe in infrared spectrophotometry analysis. The sample that were
Química Nova. Publicado em: 2003-03
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22. Influência da mineralogia dos sedimentos das bacias hidrográficas dos rios Mogi-Guaçu e Pardo na composição química das águas de abastecimento público
This work studied bottom sediment from catchment area of 13 stations of water treatment of Mogi-Guaçu and Pardo river basins, through identification of mineralogical matrix and its correlation with potential bioavailable metal concentrations. The main clay minerals present were kaolinite and illite. The values of iron and manganese grades were derived from
Química Nova. Publicado em: 2003-01
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23. Estudo de mineralizações de tipo Cu-porfiro do sul do Peru por meio de sensoriamento remoto e aeromagnetometria
A large number of mineral deposits are known in the Andes, including Cu-porphyry deposits. Among these, Cuajone, Quellaveco and Toquepala are some of the most important in the southern portion of Peru. They are located in the domain ofthe Bolivian Orocline, within the Incapuquio shear zone, a structure that controls the mineralization, ofabout 60 Ma. Airborn
Publicado em: 2002
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24. Modelo exploratorio para depositos auriferos do tipo Morro do Ouro com base em dados e tecnicas de sensoriamento remoto
A method for the identification of metallotects related to Morro do Ouro-type gold deposits (DTMO) is proposed, based on remote sensing data and techniques. Samples from this type of deposit, collected at Paracatu (Minas Gerais State) and Luziânia (Goiás State), were studied through reflectance spectroscopy and petrography. The results showed that iron oxi
Publicado em: 2000