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通过对西安东郊半坡大围沟剖面的地质调查、密集采样和孢粉分析,讨论该区植被的演替。论证了全新世古气候环境的特征,总结了早、中、晚全新世在该区发育的植被及其所代表的气候环境。从该剖面17个样品中分析出了大量孢粉,做出了黄土地层的孢粉图式。据该剖面上孢粉组合变化的分析,得出了全新世的植被与相应的气候在时间上的演变与空间上的分布范围。结果表明中全新世气候温暖湿润;晚全新世温凉干旱。
Through the geological survey, intensive sampling and sporopollen analysis of the Daweigou section in Banpo, Banpo, eastern suburb of Xi’an, the succession of vegetation in this area was discussed. The characteristics of the Holocene paleoclimate environment are demonstrated. The vegetation developed in the area during the early, middle and late Holocene and the climate environment it represents are summarized. A large amount of sporopollen was analyzed from 17 samples in this section and the sporopollen pattern of loess formation was made. According to the changes of sporopollen assemblages in this section, the temporal evolution and spatial distribution of the Holocene vegetation and corresponding climate are obtained. The results show that the mid-Holocene climate is warm and humid; late Holocene temperate and drought.