中文摘要：

通过对沧州CZ01孔岩芯野外描述，采样以及室内粒度分析和光释光（OSL）年代测定，探讨了沧州地区晚更新世以来的环境演变过程。结果表明，该岩芯垂直剖面沉积物颗粒基本构成是以黏土、粉砂、砂为主，沉积环境变化频繁。根据岩性特征及粒度参数特征可以划分为3大阶段：深度201．2～159．6m为阶段Ⅰ，年代对应于200～128kaB．P．，为中更新世晚期河流相与河湖交替沉积环境，下部以灰色一灰黄色粉细砂、细砂及中细砂为主，为河流相沉积，上部主要为棕黄色、灰黄色黏土、粉砂质黏土，为河湖相沉积；深度159．5～26．6m为阶段Ⅱ，年代对应于128～12kaB．P．，为晚更新世两个完整的沉积旋回，沉积物粒度经历了由粗-细-粗-细的变化过程。其中，第一旋回上部为灰黄色、浅黄色粉砂质黏土与黏土质粉砂，中夹灰色或灰黑色海侵相沉积的黏土质粉砂或粉砂质黏土，下部为灰色灰黄色粉细砂、中细砂，含小砾石。第二旋回上部以灰色-灰黄色黏土、黏土质粉砂为主，下部为浅灰色、灰黄色粉细砂、细砂、中砂；深度26．6～0m为阶段Ⅲ，对应于全新世以来（12kaB．P．以来）河湖相沉积，主要以灰色、灰黑色、灰黄色、黄灰色黏土质粉砂、黏土为主，中间分布海相层或海陆过渡相（潮滩相）的灰色、灰黑色或黑色黏土质粉砂或粉砂质黏土。

英文摘要：

Data of grain-size, optically luminescence Core CZ01 in Cangzhou city, is used to interpret （OSL） dating of natural profile and lithology description of the the environmental evolution in the studied area since Late Pleistocene. The analytical results of the sediments in the section help us find out that the basic composition of sediment particles is dominated by clay, sand and silt sand, with frequent changes of the sedimentary environment. The sedimentary environment can be generally divided into three great deposit phases according to the grain size characteristics and lithological characteristic： Phase I in the depth of 201 - 159.6 m （200 - 128 ka B.P.）, which is alternation of fluvial and lacustrine sedimentary environment; Phase Ⅱ in the depth of 159.6 - 26.6 m （128 - 12 ka B.P.）. The results reveal two whole depositional cycles of the last glaciation since Late Pleistocene. The changing processes of particles of coarse-fine-coarse-fine are found. Four small stages of sedimentary environment can be found in the great phases as follows： fluvial facies （159.6 - 150 m）, fluvial and lacustrine facies （150 - 80.6 m）, fluvial facies （80.6 - 70 m）, fluvial and lacustrine facies （70 - 26.6 m）; Phase Ⅲ in the depth of 159.6 - 26.6 m （since 12 ka B.P.）, which is the Holocene fluvio-lacustrine deposits, and the marine deposit can be found in the depth of 19.6 - 5.3 m.