摘要
北京西山是中国末次冰期旋回风成黄土与古气候研究的经典地区。除风成黄土外 ,该区各种次生黄土也十分发育 ,由于后者的堆积速率较大 ,其环境变化的分辨率更高。次生黄土中S1古土壤由 3层古土壤夹两层黄土构成 ,L1中的古土壤由两层古土壤夹 1层黄土组成。经年代测定和古气候分析 ,S1中的 3层古土壤分别可与深海氧同位素 5阶段中的 3个暖期对比 ,S1中的两层黄土可与5阶段中的两个次阶段对比。
Mount Xishan is the classic area for study of the eolian loess and paleoclimate of the last glacial period in China. Aside from eolian loess, various types of secondary loess are well developed in the area. As the latter are accumulated more rapidly, they are more sensitive to environmental changes and exhibit higher resolution. Within the secondary loess, S 1 comprises 3 layers of paleo soil intercalated with 2 loess layers, while L 1 includes a loess layer sandwiched by 2 paleo soil layers. Radioactive dating and paleoclimate analysis point to the fact that the 3 paleo soil layers in S 1 correspond to the 3 warm events in the 5 oxygen stages in deep sea, whereas the 2 loess layers are comparable to the other 2 stages respectively.
出处
《中国区域地质》
CSCD
2000年第2期144-148,共5页
Regional Geology of China
基金
国家自然科学基金资助项目!(49972 0 5 7)
