长江下游地区下蜀黄土成土发生学研究

Pedogenic Implication on the Xiashu Loess in Lower Reach of Yangtze River

通过对长江下游地区一个典型剖面的系统研究,探讨了长江中下游地区下蜀黄土成土特点。研究结果表明,长江下游地区全新世最适宜期形成的古土壤层(黄棕壤)是在末次冰期下蜀黄土堆积成壤基础上的再发育,与下伏下蜀黄土之间基本具备发生学联系。

Field investigation,magnetic susceptibility,grain-size analysis and optically stimulated luminescence（OSL age） dating in a loess profile of Holocene on north-bank of the Yangtze River,Nanjing,,have revealed the characteristics of pedogenic implication.The results showed that a layer paleosol（Yellow-brown soil） was formed during the Holocene Climate optimum（8500-3100 aBP） on north-bank of the Yangtze River,and the climate became warmer and wetter,the proxy index such as magnetic susceptibility was higher than other layers in total.The optically stimulated luminescence（OSL age） dating indicated the loess formed in last glacial,became the parent matters that the Paleosol re-developed.