Abstract: There was lake development during late Pleistocene in the Yanhuai basin. On the basis of the results of sporopollen sample ananlyses for four profiles of the middle and late times of late Pleistocene in the basin, combined with dating of the lacustrine stratum and the stages of lake development, we have restored the paleoclimatic environment during 55～26ka B.P. and 20～8ka B.P., during which the second and the third period lacustrine stratum developed. The lake sediment of the middle and late time of late Pleistocene reflects a wet climatic characteristic of the Yanhuai basin.

Key words: Yanhuai basin, Lake development, Sporopollen analysis, Paleoclimate

摘要： 延怀盆地晚更新世发育湖相沉积。根据4个中晚期湖相层剖面的孢粉分析鉴定结果,结合区内晚更新世湖相层的年代测定及湖泊发育的分期,恢复了发育于55～26和20～8kaB.P.时间段内的第2,3期湖泊发育期间的古气候环境。延怀盆地晚更新世中晚期湖泊沉积反映了潮湿气候的特征。

关键词: 延怀盆地, 湖泊发育, 孢粉分析, 古气候