摘要
利用GC/MS分析技术在塔5井、官77井和狮23井下第三系陆相咸水沉积物样品中检测到了丰富的Δ5-甾醇类化合物,并对其进行了定性研究,鉴定出19个化合物,碳数范围为C23—C31,丰度最高的化合物为24-乙基胆甾-5-烯-3β醇,占甾醇总量的75%左右。样品的母质类型及甾醇的分布特征表明,样品中丰富的C29甾醇可能主要来自于咸水环境中的某种藻类而非陆源物质。
Non hydrocarbon fractions of three Palaeogene salty terrestrial sediments from the Ta 5, Guan 77 and Shi 23 wells are analyzed by gas chromatography/mass spectrum, respectively and abundant sterols, up to 5.8～12.4 mg/g in extracts are found. The results of GC/MS show that the majority of this kind of compound is Δ5 stenol, whose abundant ion is m/z 129 in its mass spectrum. Nineteen compounds of this series have been identified in accordance with literature and mass spectrum characteristic of the compounds. The carbon number of these compounds is from C23 to C31, while the most abundant is 24 ethylcholest 5 en 3β ol (up to 75% among this series). Both the distinctive distribution of the sterols and the type of matrix suggest that abundant sterols in these samples may be from the algae lived in salty water other than high plants.
出处
《地球化学》
CAS
CSCD
北大核心
2002年第2期206-210,共5页
Geochimica
基金
国家自然科学基金(49672128)
石油
天然气集团公司基金(95-31-01-02)
