Mostrando 10 resultados de: 26
Filtros aplicados
Publisher
Geochemical Journal(3)
Energy Sources, Part A: Recovery, Utilization and Environmental Effects(2)
Estudios Geologicos(2)
GIS and Spatial Analysis - 2005 Annual Conference of the International Association for Mathematical Geology, IAMG 2005(2)
Journal of South American Earth Sciences(2)
Área temáticas
Geología económica(13)
Geología, hidrología, meteorología(6)
Ciencias de la tierra(4)
Minería y operaciones afines(4)
Petrología(4)
Área de conocimiento
Geoquímica(15)
Química ambiental(6)
Ciencia de materiales(2)
Ingeniería química(2)
Petróleo(2)
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:scopusCluster analysis and other multivariate statistical methods applied in the identification of chemofacies: Example in the tertiary falcon basin, Venezuela
Conference ObjectAbstract: The application of multivariate statistical methods (cluster, correspondence and factorial analysis)Palabras claves:Autores:Barráez D., Gutiérrez J.V., Manuel Martínez, Montero-Serrano J.C.Fuentes:scopusAssessment of the oil source-rock potential of the Pedregoso Formation (Early Miocene) in the Falcón Basin of northwestern Venezuela
ArticleAbstract: The early Miocene Pedregoso Formation is one of the numerous formations rich in organic matter withiPalabras claves:Biomarkers, Carbonate turbidites, Catagenesis, Falcón Basin, geochemistry, Organic matter, Redox conditions, Thermal maturity, VENEZUELAAutores:Gonzalo Márquez, Gutiérrez-Martín J.V., Manuel Martínez, Montero-Serrano J.C., Riboulleau A., Tribovillard N.Fuentes:scopusCorrelation between chemical, crystallographic and spectroscopic parameters in graphite thermometry applied to a contact aureole of la Soledad monzogranite (Venezuelan Andes)
ReviewAbstract: Graphite samples from a metamorphic contact aureole between phyllites of the Cerro Azul AssociationPalabras claves:Carbon isotopes, Contact metamorphism, graphite, Metapelites, Raman, VENEZUELA, XRDAutores:Manuel Martínez, Reátegui K.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:scopusEffect of coal weathering on some geochemical parameters
ArticleAbstract: The effect of coal weathering on some geochemical parameters was studied. Seven pairs of fresh and aPalabras claves:Bitumen, Coal, floatability, geochemistry, humic substances, VENEZUELA, WeatheringAutores:Escobar M., Manuel MartínezFuentes: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:scopusEffect of temperature, oxidation time and substrate: Oxidant agent ratio in the yield and composition of humic acids derived from coal, monitored by <sup>1</sup>H NMR and FT-ir
ArticleAbstract: The yield and composition of coal-derived humic acids (AH) was studied, obtained by oxidation of a VPalabras claves:Coal, FT-ir, Humic acids, NMR, OXIDATION, WeatheringAutores:Contreras E., Leal E., Manuel MartínezFuentes:scopusDistribution and geochemical significance of biphenyls and related bicyclic aromatic structures in oils from Ancon oilfield (Tertiary Progreso Basin), Ecuador
ArticleAbstract: A set of oils from Ancon oilfield (Neogene Progreso Basin, Ecuador), were studied by GC-MS in termsPalabras claves:ANCON, Biphenyls, Cyclohexylbenzenes, Diphenylmethanes, ECUADORAutores:Antonio Morato Medina, Érica Lorenzo, Gamboa A., Manuel MartínezFuentes: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:scopus