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利用GC/MS对江西修水更新世网纹红土的分子化石进行了系统分析,检测出微量的分子化石包括正构烷烃、一元正脂肪酸、一元正脂肪醇、α-正构脂肪酮等.易遭受后期改造的含氧分子化石(酸、醇)参数在红土剖面中波动的规律性不明显;相反,相对较为稳定的正构烷烃具有很有意义的规律性变化,其中,代表木本植物与草本植物相对变化的正构烷烃比值C27/C31以及反映低等菌藻生物与高等植物相对变化的正构烷烃比值C15-21/C22-33与深海氧同位素气候曲线的第4-20阶段具有很好的可对比性,正构烷烃分子化石记录证实了在中国南方广泛分布的被认为是湿热气候条件下形成的更新世网纹红土,受制于全球气候变化的驱动,是我国又一大全球变化研究的重要载体.
Using GC / MS, the molecular fossils of reticulate laterite in Jiangxi Province were systematically analyzed and trace molecular fossils were found to include n-alkanes, monofatty acids, monofatty alcohols, α-n-octadecanones and so on. On the contrary, the relatively stable n-alkanes have significant regularity changes, among which, the woody plants that represent woody plants and The relative n-alkanes ratio C27 / C31 of herbaceous plants and the n-alkane ratio C15-21 / C22-33, which reflects the relative changes of lower bacteria and algae organisms to higher plants, are closely related to those of the deep-sea oxygen isotope curve 4-20 Well-matched, n-alkane molecular fossil record confirms that the Pleistocene reticulate red clay, which is widely distributed in southern China and is considered to be hot and humid, is subject to global climate change and is another major global change in our country Important carrier of research.