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本文重点研究江苏武进市南部太(湖)(湖)地区ZK01、ZK02、ZK03和ZK04孔海侵层微体古生物有孔虫、介形类、钙质超微化石组合和双壳类、腹足类等大化石的地层分布,丰度、分异度的变化和生态环境特征,结合沉积物结构分析和14C年龄测定,证实晚更新世以来本地区经历了太湖海侵、湖海侵和镇江海侵,较全面地论证了每次海侵影响范围和沉积环境类型。其中湖海侵分布面积最大,高峰期可能波及卜弋周围,微体化石丰富,有孔虫组合中出现浮游型种类,反映了开放性海湾环境;太湖海侵范围限于卢家巷—马杭一线以南,化石较少,时有淡水种类出现,代表边滩泻湖—半封闭海湾环境;镇江海侵层仅见于卜弋ZK01孔,化石稀少,沉积物以亚砂土、亚粘土为主,是潮间带-潮坪相的产物
This paper focuses on the microfacies of foraminifera, ostracods, calcareous microfossils and bivalves of the ZK01, ZK02, ZK03 and ZK04 pore-boreholes in the Taihu Lake in the southern part of Wujin City, Jiangsu Province. Based on the analysis of sediment structure and the determination of 14C age, it has been confirmed that the region experienced the transgression of Taihu seaward, the transgression of Taihu Lake and the transgression of Taihu Lake since the late Pleistocene Zhenjiang transgression, a more comprehensive demonstration of the impact of each transgression and sedimentary environment types. Among them, the distribution area of transgression in Lihu Lake is the largest, the peak may be around Bo Yi, the rich in microfossils and the planktonic species appear in the foraminifer assemblage, which reflects the open Gulf environment; the scope of Taihu Sea transgression is limited to Lu Jiaxiang-Mahang South of the line, there are fewer fossils, freshwater species appear at the time, representing the side beach lagoon - a semi-enclosed Gulf environment; Zhenjiang sea transgression is only seen in Bu Yi ZK01 hole, sparsely fossilized sediments to sub-sand, Is the tidal zone - tidal flat product