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对澧阳平原SL剖面的系统采样和室内稀土元素分析、粒度分析和AMS14C年代测定,揭示了澧阳平原岗地黄土剖面成因特征,探讨了澧阳平原晚冰期短尺度的气候变化过程。结果表明,澧阳平原岗地黄土在稀土元素配分模式上与黄土高原黄土-古土壤、镇江下蜀黄土具有高度的一致性,而且岗地剖面沉积物无任何水流作用痕迹,因此表明,澧阳平原岗地黄土剖面为风成成因。粒度结果表明,SL剖面较好地记录了晚冰期短尺度的气候变化过程,SL遗址剖面自然沉积物记录了晚冰期千年尺度的气候事件,如BL事件、OlderYD事件、AL事件、YD事件。SL剖面全新世早期表现为升温阶段,9.0～8.00kaBP的彭头山文化在此区兴起,表明此时气候相当适宜,适合人类生存。
The systematic sampling and indoor rare earth element analysis, grain size analysis and AMS14C dating of the SL profile in the Mianyang Plain reveal the genetic characteristics of the loess section in the Xingyang plain and reveal the short-range climate change during the late glacial period of the Xingyang Plain. The results show that the Loess Plateau in the Yangyang Plain is highly consistent with loess-paleosol in the Loess Plateau and Xiashu Loess in the Zhenjiang area in the pattern of REE allocation, and there is no trace of water flow in the sediments of the Kongdian Plain. Therefore, Loess profile is the cause of wind. The results of grain size indicate that the SL profile better records the short-term climatic change in the late glacial period. The SL sedimentary record shows the climatic events at the Millennial scale of the Late Glacial, such as BL, OlderYD, AL, and YD events. In the early Holocene, the SL profile showed a warming stage. The 9.0-9.00 ka BP Mt. Pengtoushan culture emerged in this area, indicating that the climate is quite suitable for human survival.