【摘要】 本文通过对上海地区约200个深孔和300个浅孔的岩性、岩相分析,把本区第四纪沉积层归纳为十二个沉积单元,并根据孢粉与微古分析资料得出与之相应的孢粉组合带及海陆相沉积。从沉积结构特征和孢粉组合特点,得出第四纪时期本区有五个寒冷期及与之相间的四个温暖期和冰后期,自早至晚分别命名为:崇明寒冷期、沪西寒冷期、沪东寒冷期、闸北寒冷期、苏州河寒冷期、根据微古和岩相等资料,发现有同温暖期和冰后期相呼应的五次不同范围的海浸,自早至晚命名为:江镇海浸、邓镇海浸、西郊海浸、曹家渡海浸和外滩海浸。在寒冷期以湖相沉积为主,在温暖期以河流相沉积为主,局部地区为海相沉积。按古气候地层划分原则,把本区第四纪地层划分为:古更新统(层12-11);早更新统(层10-0);中更新统(层8-7);晚更新统(层6-3);新更新统(层2),和全新统(层1)。更多还原

【Abstract】 The paper divides the Ouaternary Sedimentary strata in shanghai region into twelve sedimentation units by analysis of the lithological charactors and lithofacies got from the study of about 200 deep cores and 300 shallow cores in the region of shanghai.In addition based on analy- sis of sporo-pollen and microfossls,this paper gives the correspondent zones of the sporo-pollen composition and distribution of the land and marine deposits The accordance with the features of the sedimentary structure and the nature of sporo-pollem compositions the Quaternary period might be derided into five cold stages,with foul intevening warm stages and the post-glacial stage.In order of time we denominated them as:Chung-min cold stage,Hu-Xi cold stage;Hu-Dung cold stage,Zha-Bei cold stage and Su-Zhou River cold stage.In terms of the date of microfossils and lith- oracies,they represent five marine transgressions with different scopes of activity corresponding to the above warm stage and the post-glacial stage.We denominated them as Jiang-Zheng transgression,Deng-Zhen transgression,Xi-giao transgression,Chao-Jia-Du transgression and Wai- Tau transgression. In the cold stage,lacustrime facies dominaten the deposits.In the warm stage,followed by the transgression,most of the deposits represent themselves as fluviatile facies with marine deposits in same parts of the region According to the method used in Palaeorlimatdogy and stratigraphic division,the Quaternary strata in Shanghai region may be divided as: ancient Pleistocene (stratal2—11);Early Pleistocene (strata10—9) middle Pleistocene (strata8—7);Late Pleistocene (strata6—3);new Pleistocene (strata2),and Holocene (strta1).更多还原