舟山岛中更新世以来孢粉组合特征及古气候变迁

THE ANTHOPHYTA ASSEMBLAGES AND PALEOCLIMATE VARIATION OF ZHOUSHAN ISLAND SINCE MIDDLE PLEISTOCENE

根据舟山岛 ZK1孔 33个孢粉和 37个微体古生物样品的分析 ,讨论了我国第四大岛——舟山岛自第四纪中更新世以来的古植被、古气候变迁。舟山岛经历了 3个寒冷期 ,2个温暖期和 1个冰后期 ,其中第二冷期又可分出 2个亚冷期和 2个亚暖期 ,冰后期可分出北方期—前北方期、亚北方期—大西洋期和亚大西洋期 ,为舟山岛第四纪地层划分和地层对比提供了充分的依据。

The paper discussed the variation of paleoecology and paleoclimate of Zhoushan Island——the fourth largest island in China——since middle Pleistocene,according to the analysis data of 33 anthophyta samples and 37 paleo microbiologic samples from ZK1 hole.The results indicate that the geologic history of Zhoushan Island since middle Pleistocene can be divided into three ice ages,two warm periods and one post glacial period.In addition,the second ice age can be further divided into two sub ice periods and two sub warm periods.The post glacial period can be divided into north prenorth period,subnorth Atlantic period,and sub Atlantic period.This research provided sufficient data for strategic analysis and comparison of Zhoushan Island since middle Pleistocene.