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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。C_(27)、C_(28)和C_(29)规则甾烷的丰度分布,以C_(29)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。C_(29)降莫烷/C_(30)藿烷,C_(31)升莫烷/C_(30)藿烷,C_(31)22S/(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。
In this paper, gas chromatography and mass spectrometry were used to analyze the contents of steranes and terpenoids in the sediments of the Great Wall and its vicinity. The abundance distribution of Cys (27), C_ (28) and C_ (29) regular steranes showed the highest amount of C_ (29) steranes, 47-52%. The presence of rearrangement steranes suggests that some of the regular steranes are converted to rearrangement steranes by the action of microorganisms early in diagenesis. The ratios of C_ (29) noradane / C_ (30) hopane, C_ (31) l moll / C_ (30) hopane, C_ (31) 22S / (22S + 22R) and Tm / The organic matter is at medium maturity, and the G9 station is more sediment-rich than other stations. The above results show that the source material derived from the higher terrestrial plants, and mixed with a certain amount of biological material.