广西百色盆地湖相有机质中单环烷烃分布特征及其地化意义浅析

笔者运用GC—MS方法,在广西百色盆地湖相暗色泥岩和原油的UNA组分中普遍检测到单环烷烃。经初步研究认为,此类化合物碳数组成与分布和典型海相有机质明显有别。同一样品中烷基环己烷、正构烷烃和一元正脂肪酸的碳数组成、分布的相似性为烷基环己烷源于脂肪酸提供了证据,因而此类化合物亦属生物标志化合物,是生源物输入和油源对比的潜在良好标志。

THE DISTRIBUTION CHARACTERISTICS OF MONOCYCLIC ALKANES IN ORGANIC MATTER OF LACUSTRINE FACIES FROM BAISE BASIN IN GUANGXI AND THEIR GEOCHEMICAL SIGNIFICANCE

on the basis of GC-MS.,the monocyclic alkanes have generally been discovered from urea non adduct(UNA)of dark mudstone and oils of lacustrine facies in Baise basin,Guangxi. The first study shows that the carbon composition and distribution of these compounds are clearly distinguished from typical marine organic matter. In the same sample,the carbon composition and distribution of the n-alkaclohexanes is similar to that of n-alkanes and n-fatty acids,which proves that n-alkyclohexanes originates from n-fatty. These compounds, therefore, belong to the biomarkers and can beconsidered as potential favorable markers for importing organic matter and tracing oil source.