泥炭沼泽有机地球化学研究进展

Progresses in Organic Geochemical Studies on Lipids of Mires

近几十年来,国内外泥炭沼泽地球化学研究取得了一系列重要进展,特别是在脂类化合物和稳定同位素等方面。泥炭沼泽是一个良好的地质档案,泥炭纤维素碳、氢和氧同位素组成和比值是环境变化的综合参数,沉积脂类化合物含有反映有机质母源先质的骨架结构,这些标志物高分辨率地记录了全新世以来古气候、古植被和古环境的演变信息,在当今全球变化研究中占有相当重要的地位。本文综述了泥炭沼泽地球化学研究进展,侧重于泥炭沼泽脂类化合物和稳定同位素等标志物的地球化学研究现状和发展趋势;侧重论述了研究技术的发展、定性说明到定量分析的过渡、研究精度的提高及存在的问题,分析了这些分子标志物与植被演替、气候变迁和环境变化间的对应关系,指出了我国在该方面的薄弱之处以及需加强的领域。

In last decades,a series of important progresses have been achieved in geochemical studies on mire marshes,especially on the aspects of lipids and their stable isotopes. Peat marshes are good geological records because the makeup and ratio of peat celluclose carbon hydrogen and oxygen isotopes are composite parameters of environment change. Sedimentary lipids contain basic structures that reflect organic sources.These biomarks have well recorded evolutionary information of paleo-climate,paleo-vegetation and paleo-environment since Holocene and ,thus, play an important role in the research of current global change. In this paper, recent progresses in study on geochemistry of peat marshes are summarized,with focuses on several important problems including the development of research technology, the transition from qualitative explanation to quantitative analysis, the improvement of research precision, and the existing problems.