中文摘要：

应用GC，GC，MS分析法，系统剖析了南海现代沉积物中有机质的分子地球化学特征，对其生物标志物组成、成熟度和成因进行了研究。研究认为，南海现代沉积物中有机质族组成具有现代有机质特征，但部分生物标志物参数特征表明烃类具有低成熟度，可能有外源有机质的加入。O-2，O-6，O-10和O-13样品中的烃类组成特点说明，这4个样品中的烃类是在海相贡献略高于其他样品环境中的条件下形成的。甾烷的组成特点说明了南海现代沉积物中有机质生源的特殊性。

英文摘要：

Geochemistry characteristic of organic matters in the sediments from the South China Sea was analyzed, and biomarkers of its composition, maturity and the causes of organic matters were studied by GC, GC / MS analysis. It was believed that organic matters in the sediments from the South China Sea had modem organic characteristic, however, some biomarkers characteristic parameters indicated that hydrocarbons had low maturity and it would be exogenous to the organic matter. The hydrocarbon characteristic in the O-2, O-6, O-10 and O-13 samples suggested that marine contribution was lightly higher than the other samples in the environment under the conditions of formation in four samples. The sterane composition showed the particularity of organic matter source in the modem sediments from the South China Sea.