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对南沙海域中大陆坡柱状沉积物中甾醇进行了分析，从中检出了碳数为C_(27)-C_(30)的11种甾醇生物标志化合物。它们的组成特征反映了沉积有机质主要来自浮游生物，陆源高等植物的贡献很少；不同沉积层段中甾醇的组成差异可能与生态环境有关；甾烷醇与甾烯醇比值随沉积深度而增加的趋势，指示了甾烯醇向甾烷醇的转化，这种转化可能是通过化学和生物化学的氢化作用实现的。
The sterols in column sediments of the continental slope in the Nansha sea area were analyzed, and 11 sterol biomarkers with carbon number of C 27 C 30 were detected. Their compositional characteristics reflect the contribution of sediment organic matter mainly from plankton and terrestrial higher plants. The differences in the composition of sterols in different sediment layers may be related to the ecological environment. The ratio of stanol to sterols increases with deposition depth The trend indicates the conversion of sterols to stanols, which may be achieved by chemical and biochemical hydrogenation.