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近几年来,随着对青藏公路沿线冻土科研工作的深入开展,在楚玛尔河高平原清水河地区发现了较完整的晚更新世──全新世湖相、湖滨相地层。作者在野外调查的基础上对上述地层系统采样进行了C~(14)年代测定、孢粉分析、土的矿物成分、含盐量、水和冰的化学成分分析及X光衍射测定。本文基于前人的工作并根据上述分析资料及地层的沉积特征试图恢复清水河地区晚更新世以来古气候的变化,并着重探讨其多年冻土的演化过程。
In recent years, along with the deep research on permafrost research along the Qinghai-Tibet Highway, a relatively complete Late Pleistocene-Holocene lacustrine facies and lacustrine facies have been found in the Qingshuihe area of the Chumar Plain. On the basis of field investigation, the authors conducted C ~ (14) dating, sporopollen analysis, mineral composition, salinity, water and ice chemical composition analysis and X-ray diffraction of the above stratigraphic system. Based on the previous work and based on the above analysis data and the sedimentary characteristics of the strata, this paper attempts to recover the paleoclimate changes of the Qingshuihe area since the late Pleistocene and to focus on the evolution of its permafrost.