对红原泥炭沉积中颗粒物表面形态进行了扫描电子显微镜观察并对泥炭灰分进行了矿物学测试。结果表明:石英颗粒有明显的贝壳状断口、蝶形坑、毛玻璃麻点等特征。矿物组成以石英和长石为主,其他矿物含量较少。这些结果从微观和矿物学角度描述了红原泥炭的沉积学特征。结合其他证据,进一步论述了红原地区泥炭中含有风成堆积,从而为开展高分辨率冬季风演化历史重建研究,冬夏季风演化规律与相互关系研究,以及人类活动参与下的大气化学环境变化历史重建研究等提供了基础。
In this paper, the surface texture of the particles in Hongyuan peat and the mineralogical characters of the peat were analyzed. The results show that the surface texture of quartz particles in the study site has the same characters to that of the eolian deposits (e.g. loess). The main mineral in the peat are quartz and potash feldspar. These results, integrated with grain size analysis, can provide the evidence that the peat sediment in the Hongyuan swamp contains eolian components, providing a good opportunity to the study of high resolution reconstruction of winter monsoon history, the study of phase relationship between the summer and the winter monsoons, and the study of the variation of atmospheric chemistry under the influence of human activities.