南京燕子矶下蜀黄土中铁含量与古气候变化

Ferrum in Loess Strata and Palaeoclimatic Changes of the Xiashu Loess in Yanziji of Nanjing

本文从南京燕子矶下蜀黄土剖面26.5米深度内106个样品的分析结果,论述了下蜀黄土地层中氧化铁的富集程度是气候湿热状况、植被繁茂程度和成壤作用强度的反映,是一个极好的指示古气候的指标。它甚至能够正确地反映出末次冰期气候的颤动这样环境变迁的细节。这将为探索长江下游(下蜀黄土范围)地区第四纪古气候变化提供重要线索。

106 samples were taken from the upper part within the depth of 26. 5 m. in the Xiashu loess section in Yanziji of Nanjing. The accumulation degree of oxide iron in loess and soil, which reflects the climatic situation of warmth and humidness, thg luxuriancy of vegetation and the degree of pedogenesis,is a good index of palaeoclimate. It can even reflect correctly the detail of the climatic vibration during the lastest glacial period,which will provide valuable ideas for further exploration of the Quaternary climate in the area (covered by the Xiashu Loess) of the lower reaches of the Yangtze River.