摘要
本文应用分子有机地球化学方法研究了中国陆相沉积盆地22个代表性样品,试图确认陆相沉积物的古环境。样品包括白垩纪至第三纪的油页岩、页岩、泥岩和芒硝。根据地质和地球化学资料判断,所研究的样品均为湖相沉积物。按盐度可划分为淡水、半咸水或淡水和高盐度水或咸水三种环境的沉积物。对沉积样品抽提物的脂肪烃组分进行了色谱分析和色谱-质谱分析,并在质量色谱图上测得无环烷烃和环烷烃化合物的相对丰度及有关参数。
In an attempt at assessment of the paleoenvironments of terrestrial sediments, some twenty two representative Chinese non-marine sediment samples were studied using the molecular organic geochemistry method. The sediment samples studied 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/herpysaline 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.
出处
《地球化学》
CAS
CSCD
北大核心
1991年第1期1-12,共12页
Geochimica
基金
国家自然科学基金(4880108)
