摘要
本文以盘星藻作为典型样品，研究淡水水生单细胞藻类的烷烃生物标志物特征及其热解生烃特征。实验结果表明，盘星藻生烃主要分成四大类：正烷烃、烯烃、无环类异戊二烯和二环菇类。ｎＣ＿１７，在正烷烃组分中占５１．６％。检出一组Ｃ＿２０。的二环萜类同分异构体，其含量相当于正烷烃含量的９７．１％。盘星藻热解生烃也以低碳数烃类为主，与高等植物来源的烃类相区别；甾烷Ｃ２９／（Ｃ２７＋Ｃ２８＋Ｃ２９）值为０．５左右，与海洋浮游生物来源的有机质生烃相区别。
Pediastrum is a type of unicellular algae living in fresh water, with great capacity of reproduction. Its fossil is scattered in certain strata of oil-fields in China.The primary hydrocarbons derived from pediastrum mainly consist of alkanes in the light component and alkenes in the heavy component. A group of bicyclic terpens isomers are detected in the primary hydrocarbons. Their content is analogous to normal alkanes. The results of thermal alteration show that the normal alkanes related to the immaturative and low maturative stages of pediastrum are principally composed of light components(≤C20), different from those derived from terrigenous organic matter. The sterane ratio of C29/C27+C28+C29 is about 0.5, which differs from that of the hydrocarbons related to oceanic planktons.
出处
《地球化学》
CAS
CSCD
北大核心
1994年第3期291-299,共9页
Geochimica
基金
国家重点实验室资助
