【摘要】 本文采用气相色谱和质谱联用技术,分析了长城湾及其附近沉积物中甾烷和萜烷化合物。C₂₇、C₂₈和C₂₉规则甾烷的丰度分布,以C₂₉甾烷的量最高,达47～52％。重排甾烷的存在表明,在成岩作用早期,在微生物的作用下,部分规则甾烷转变成重排甾烷。C₂₉降莫烷/C₃₀藿烷,C₃₁升莫烷/C₃₀藿烷,C₃₁22S/（22S+22R）和Tm/Ts等比值指出,沉积有机质处于中等成熟度,而且G9站较其他站沉积物含量高些。上述诸结果说明,生源母质来源于陆源高等植物,并混有一定量的生物物质。更多还原

【Abstract】 Sterane and hopane compounds in the sediments are analysed by using gas chromatographic and mass spectra-metric methods. In distribution patterns of C27, C28, and C29 regular sterane, the level of C29 sterane is the highest, up to 47- 52% The occurrence of rearranged sterane indicates that in early stage of diagenesis, with the participation of microbe, the regular sterane was partly transformed to rearranged sterane. The ratios of C29 nomoretane/ C30 hopane, C31 homoretane/ C30 hopane, C3122S+22R, and Tm/Ts show that the maturity of sedimentary organic matter is moderate, but the station G-9 is higher.更多还原