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该文对长江口、黄河口以及废黄河口现代沉积物中生物标志化合物组成进行分析。结果表明 :长江与黄河沉积物中的生物标志化合物组成有较大的差别 ,长江沉积物中具明显奇偶优势的高碳数正构烷烃以及 C2 9甾烷的相对含量较高 ,Pr/Ph值较大 ,受陆生高等植物的影响明显 ;黄河低碳数正构烷烃和 C2 7甾烷的相对含量较高 ,Pr/Ph值较小 ,受陆生高等植物的影响较弱。甾烷、萜烷的成熟度指数显示长江高于黄河、现代黄河高于废黄河。这些差异主要受流域环境背景和流域内人文过程两大不同因素的影响
This paper analyzes the composition of biomarkers in modern sediments from the Changjiang Estuary, the Yellow River estuary and the waste Yellow River Estuary. The results showed that the compositions of biomarkers in the sediments of the Yangtze River and the Yellow River are quite different. The relatively high contents of high-carbon normal alkanes and C2 9 steranes in the Yangtze River sediments are relatively high, Pr / Ph Which was significantly affected by terrestrial higher plants. The relative content of low-carbon n-alkanes and C2-S steranes in the Yellow River was relatively high, and the Pr / Ph value was small, which was less affected by terrestrial higher plants. The maturity index of steranes and terpanes shows that the Yangtze River is higher than the Yellow River and the Yellow River is higher than the Yellow River. These differences are mainly influenced by two different factors, namely the environmental background of the river basin and the humanistic process in the river basin