CAJ | 학술논문

通过对长江口北支XL1孔48个样品的有孔虫定量分析,将该孔划分为3个有孔虫组合带（含有8个组合亚带）,并将其与崇明岛北部的永隆沙CY孔沉积特征进行对比,确定了XL1孔为晚全新世以来的沉积。对比分析两孔有孔虫组合特征,参照CY孔孢粉组合分析结果,对长江口北支XL1孔揭示的气候与海平面变化进行研究。XL1孔3个有孔虫组合带所反应的气候变化特征依次为温和略湿（后期又转暖一些）→温而略干→温暖湿润;海平面变化自带1→带3为上升-下降→下降-上升→上升的变化特征。
통과대장강구북지XL1공48개양품적유공충정량분석,장해공화분위3개유공충조합대（함유8개조합아대）,병장기여숭명도북부적영륭사CY공침적특정진행대비,학정료XL1공위만전신세이래적침적。대비분석량공유공충조합특정,삼조CY공포분조합분석결과,대장강구북지XL1공게시적기후여해평면변화진행연구。XL1공3개유공충조합대소반응적기후변화특정의차위온화략습（후기우전난일사）→온이략간→온난습윤;해평면변화자대1→대3위상승-하강→하강-상승→상승적변화특정。
The quantitative analysis on 48 foraminifer＇s samples were carried out for Core XL1 in Xinglong sand of the North Branch,the Yangtze River Estuary.It can be found that there are 3 foraminiferal assemblages zones（including 8 foraminiferal assemblages sub-zones）.It was speculated that the sendimentary environment of core XL1 occurred since late Holocene on the basis of the analysis of the sedimentary environment in core XL1 contrasted with core CY in Yonglong sand of Chongming Island.With the comparative analysis of the two Cores CY and XL1 about foraminiferal assemblages characteristic,and referring to the result of vegetable spore characteristic,It was discussed that the characteristic of the climate and sea level change reflected in the core XL1 on Xinglong sand.It opens out that the 3 foraminiferal assemblages zones of core XL1 reflects that the climatic characteristic is warm and a little moist → temperate and a little dry → warm and moist in turn;such fluation of the climate accords with not only the changes of the word climate,but also the changes of the sea level is rise to decline→decline to rise→rise,providing reliable information for reconstruction of plaeoclimate and plateoenvironment.