Mostrando 10 resultados de: 12
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Energy Sources, Part A: Recovery, Utilization and Environmental Effects(2)
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GIS and Spatial Analysis - 2005 Annual Conference of the International Association for Mathematical Geology, IAMG 2005(1)
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Geología económica(6)
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scopus(12)
Characterization of physicochemically abnormal coals in the matarere formation (Cerro Saroche National Park, Venezuela)
ArticleAbstract: Proximate and ultimate analyses, % Rm, vitrinite anisotropy, Rock-Eval Tmax, and biomarkers have beePalabras claves:Biomarkers, Cerro Saroche National Park, coal rank, organic petrography, vitrinite reflectanceAutores:Escobar M., Esteves I.H., Fortes-Garrido J.C., Gonzalo Márquez, Manuel Martínez, Moreno O., Ruggiero A.Fuentes:scopusApplying the ratio matching method in the correlation of sedimentary sequences and individual beds in a coal-bearing unit. Advantages and limitations of the technique
Conference ObjectAbstract: Conventional techniques employed in the correlation of sedimentary sequences or single beds make usePalabras claves:Autores:Esteves I.H., Gamboa A., Gutiérrez J.V., Manuel Martínez, Montero-Serrano J.C.Fuentes:scopusGeochemistry and chemostratigraphy of the Colón -mito juan units (campanian-maastrichtian), Venezuela: Implications for provenance, depositional conditions, and stratigraphic subdivision
ArticleAbstract: A geochemical and chemostratigraphical study was undertaken on Campanian-Maastrichtian sedimentary rPalabras claves:Chemostratigraphy, Colón -mito juan sequence, geochemistry, Lake maracaibo, Stratigraphic subdivisionAutores:Carlos Sierra, Escobar M., Esteves I.H., Gallego J.R., Gonzalo Márquez, Gutiérrez J.V., Manuel Martínez, Montilla L.Fuentes:scopusGeochemistry of the Mirador Formation (Late Eocene-Early Oligocene), southwestern Venezuela: Chemostratigraphic constraints on provenance and the influence of the sea level
ArticleAbstract: A geochemical study was carried out on Eocene-Lower Oligocene sedimentary rocks (the Mirador FormatiPalabras claves:Chemostratigraphy, geochemistry, paleoenvironments, Provenance, VENEZUELAAutores:Esteves I.H., Gutiérrez J.V., Manuel Martínez, Martínez A., Meléndez W., Reátegui K., Urbani F.Fuentes:scopusEffect of solvent structure and amine addition on the depolymerization of a bituminous Venezuelan coal
ArticleAbstract: This research article describes the solvents composition and structure effects on the depolymerizatiPalabras claves:Amine, Depolymerization, Donor–acceptor number, extraction, Solubility parametersAutores:Érica Lorenzo, Escobar M., Esteves I.H., Gamboa A., Garbán G., Manuel Martínez, Quintero K.Fuentes:scopusDistribution of tiophenic organosulphur compounds in some venezuelan coals
ArticleAbstract: Some tiophenic organosulphur compounds (OSC) distribution in coal bitumen of four different localitiPalabras claves:Coal, Multivariate analysis, Organosulphur compounds (OSC), Sedimentary paleoenvironments, Thermal maturityAutores:Escobar M., Esteves I.H., González R., Manuel MartínezFuentes:scopusNon-parametric approach to analysing PAHs data in atmospheric settled particles: Valencia City, Venezuela
ArticleAbstract: Non-parametric statistics and cluster analysis have been found useful to evaluate differences/similaPalabras claves:Atmospheric, categorical, non-parametric, PAHs, Pollutants, VENEZUELAAutores:Esteves I.H., Fernàndez R., Gamboa A., Laurent-Singh C., Manuel MartínezFuentes:scopusOrganic geochemical investigation and coal-bed methane characteristics of the Guasare coals (Paso Diablo mine, western Venezuela)
ArticleAbstract: The aim of this work was to carry out a geochemical study of channel samples collected from six coalPalabras claves:Biomarkers, coal-bed gas, Guasare bituminous coal, Paso Diablo mine, western VenezuelaAutores:Escobar M., Esteves I.H., Garbán G., Gonzalo Márquez, Hackley P., Manuel Martínez, Quintero K.Fuentes:scopusIdentification of biomarkers in a bituminous coal treated with acid and an unconventional solvent
ArticleAbstract: This article describes saturated biomarkers (n-alkanes, hopanes and steranes) identified in the extrPalabras claves:Bitumen, Demineralization, Depolymerization, extraction, N.N-dimethylformamideAutores:Érica Lorenzo, Escobar M., Esteves I.H., Gamboa A., Garbán G., Manuel MartínezFuentes:scopusTrace elements of Paleocene Táchira coals, Southwestern Venezuela: A geochemical study
ArticleAbstract: The concentration and distribution of 35 elements in 78 coal samples from the Táchira State coal fiePalabras claves:Coal, factor analysis, geochemistry, Trace elements, VENEZUELAAutores:Carmen Milena López, Escobar M., Esteves I.H., Galarraga F., González R., Manuel MartínezFuentes:scopus