中文摘要：

文中对上海奉贤DY03孔222m长的沉积物柱状样样品进行有孔虫定量统计分析，结合颗石藻、孢粉等其它古生物学资料，重建了晚新生代长江三角洲南部沉积环境变化。钻孔孔深60m以上发现有孔虫产出，包括60-40m与24．6—2m两层位，尤以24．62m有孔虫丰度较高。孔深60m附近有孔虫丰富，底栖有孔虫主要属种为Ammonia beccarii vars．，Nonionella stella，Prote[phidium tubercuZatum，Elphidiumadvenum和Astrononiontasm＆nensis等，而58．849．2ITI则不含有孔虫；孔深48．8—40m，有孔虫丰度、分异度均从下而上降低，从以Ammonia beccarii vars．-Elphidium advenum组合为主，Ammoniacompressiuscula，Florilusdecorus，Pseudononionellavariabi／is及Nonionellastella等繁盛的面貌，变为仅含少量的Ammoniabeccariivars．和Elphidiumlimpidum等。有孔虫群落在6040m层位呈现了其沉积环境由滨岸演变为浅海、又转变为滨岸的演化序列。另一有孔虫丰富层位（埋深为24．6—2m）中，有孔虫分布连续、丰度高、属种分异度高，其中下部21．4—8．8m含有大量的低盐种Pseudononionellavariabilis，Stomoloculinasp．以及少量Heterolepa spp．和Lagenahispida；中部8．4—5．0m产出大量深水型分子Ammoniacompressiuscula及代表高温、高盐环境的瓷质类型Quinqueloculinaseminula，Triloculi—narotunda和Spiroloculina laevigata；上部4．82m中深水类型缺失，从下至上显示了-个海水由浅到深再变浅、海水盐度由低到高再变低、海水温度由低到高再变低的海侵-海退过程，且本次海侵较上次海侵水深更深、范围更广。对比显示，DY03孔24．6—2In地层相当于中国东部广泛存在的第-海侵层（全新世），而6040m地层则相当于第二海侵层（晚更新世），有孔虫等生物群落演化反映了该地区晚更新世以来的两次较大海水进退过程。

英文摘要：

Detailed foraminiferal analyses on the sediments from a 222 m-long core （DY03, Fengxian, Shanghai） reveals the Late Neogene environmental changes of southern Yangtze Delta. More than 370 samples were analyzed for the whole core. However, foraminifera occurred only above 60 m and were abundant at depth intervals of 24. 6--2 m and 60--40 m. For the lower fossil-abundant strata, benthic foraminiferal assemblage changes from Ammonia beccarii vars. , Nonionella steZla, Protelpkidium tuberculatum, Elphidium advenum and Astrononion tasmanensis （60--59.2 m） to Ammonia beccarii vars. , Elphidium advenum, Ammonia compressiuscula , Florilus decorus , Pseud-ononionella variabilis and Nonionella stella （-48.8 m）, and to the low abundant Ammonia beccarii vars. , Elphidium limpidum assemblage （- 40 m）. These changes imply an environmental variation from the coast, the shallow sea and then to the coast, which indicates a marine transgression/regression sequence. Foraminiferal distribution is relatively continuous with much abundantand diverse fossils at depth intervals of 24.6--2 m. A large number of PseudononioneHa variabiZis, Stomoloculina sp. , Heterolepa spp. and Lagena hispida occurred in the lower part 24. 6--8.8 m; Abundant deep-water Ammonia compressiuscula and normal salinity, warm Quinqueloculina seminula, Triloculina rotunda and Spiroloculina laevigata occurred at 8.4--5.0 m; And only near-shore Ammonia beccarii vars.-Elphidium advehllm assemblage was observed at 4. 8--2. 0 m. This variation for the upper fossil-abundant strata suggests another marine transgression/regression sequence, with a depositional environment that might have been much warmer and deeper than the lower one of the core. Regional comparison sug- gests that the upper and lower fossil-abundant strata （24. 6--2 m and 60--40 m） in Core DY03 can be correlated with the postglacial transgression and Late Pleistocene transgression, respectively. Foraminifera and other fossils yielded in Core DY03 clearly reflected the environmental and