In an attempt to assess the paleoenvironments of terrestrial sediments,some twenty-two representa-tive Chinese non-marine sediment samples were studied using the molecular organic geochemistry method.The sediment samp...In an attempt to assess the paleoenvironments of terrestrial sediments,some twenty-two representa-tive Chinese non-marine sediment samples were studied using the molecular organic geochemistry method.The sediment samples stuied include oilshale,shale,mudstone and glauber salt from Tertiary to Cretaceous in age.Judging from geological/geochemical data and paleosalinity data,the samples studied are of lacustrine sedimentary origin and can be divided into three different types:fresh water,brackish and saline/hypersaline lake sediments.The aliphatic fractions were separated from the extracts of the samples and analysed by means of GC and GC/MS instruments,giving a number of parameters such as relative abundances of alkanes and cycloalkanes as shown in the mass chromatograms.展开更多
A heavy media separation has been carried out to study the partition of germanium in various macerals of mineralized lignites in Lincang superlarge germanium deposit in Yunnan, China. The result shows that Ge stays pr...A heavy media separation has been carried out to study the partition of germanium in various macerals of mineralized lignites in Lincang superlarge germanium deposit in Yunnan, China. The result shows that Ge stays predominantly in huminites, especially in corpohuminites （86.04%\89.16%）, next in light macerals and minerals （3 20%\8.33% and 1.71%\10.27%, respectively）. In addition, the EPMA and PIXE analyses suggest that no germanium minerals have been detected and Ge is well distributed in the whole mineralized lignite, bonding to O, C and H of coaly organic matter of mineralized lignites.展开更多
基金This project was financially supported by the National Natural Science Foundation of China.
文摘In an attempt to assess the paleoenvironments of terrestrial sediments,some twenty-two representa-tive Chinese non-marine sediment samples were studied using the molecular organic geochemistry method.The sediment samples stuied include oilshale,shale,mudstone and glauber salt from Tertiary to Cretaceous in age.Judging from geological/geochemical data and paleosalinity data,the samples studied are of lacustrine sedimentary origin and can be divided into three different types:fresh water,brackish and saline/hypersaline lake sediments.The aliphatic fractions were separated from the extracts of the samples and analysed by means of GC and GC/MS instruments,giving a number of parameters such as relative abundances of alkanes and cycloalkanes as shown in the mass chromatograms.
文摘A heavy media separation has been carried out to study the partition of germanium in various macerals of mineralized lignites in Lincang superlarge germanium deposit in Yunnan, China. The result shows that Ge stays predominantly in huminites, especially in corpohuminites （86.04%\89.16%）, next in light macerals and minerals （3 20%\8.33% and 1.71%\10.27%, respectively）. In addition, the EPMA and PIXE analyses suggest that no germanium minerals have been detected and Ge is well distributed in the whole mineralized lignite, bonding to O, C and H of coaly organic matter of mineralized lignites.
