东海陆缘(浙南段)晚第四纪硅藻的发现及古环境分析

DISCOVERY OF DIATOMS AND ANALYSIS OF PALEOENVIRONMENT OF THE LATE QUATERNARY ON THE MARGIN OF EAST CHINA SEA (SECTION OF SOUTH ZHEJIANG)

东海陆缘 (浙南段 )温州沿海以往第四纪沉积已开展了一些研究 ,见有丰富的有孔虫、孢粉等生物化石 ,但未发现硅藻。本项研究在温州 CH6井、台州 CH5井岩心中发现了大量硅藻化石 ,本文以温州 CH6井丰富的硅藻化石为依据 ,建立了晚第四纪硅藻组合序列 ,划分为 12个硅藻带 ,并恢复其古环境演替 ,根据四个 AMS1 4C年代数据 ,其时代属早。

Previous researches of Late Quaternary on margin of East China Sea (Section of South Zhejiang) uncovered abundant fossils of pollen & spores and foraminifera. Now diatoms were discovered there through this study. Our research found abundant diatoms in the cores both of drill CH6 in Wenzhou and of drill CH5 in Taizhou, and we set up the diatom assemblages in the Late Quaternary according to the diatom fossil of CH6, and then 12 diatom biozones were given and the paleoenvironment restored. The age of the section should be Early and Middle Holocene according to four AMS 14 C dates.