古脊椎动物学报2007，Vol.45Issue(2)：161-172,12.
珠江三角洲晚第四纪环境演变的微体生物记录
LATE QUATERNARY MICROFAUNAS AND PALEOENVIRONMENTAL CHANGES RECORDED IN CORE SEDIMENTS OF THE PEARL RIVER DELTA, SOUTH CHINA
摘要
Abstract
Late Quaternary core sediments from the middle area of the Pearl River Delta can be lithologically divided into six units. Unit 1,2, and 5 contain foraminifers and ostracods in different abundances. Faunal analysis suggests that they were deposited in brackish to marine environments. Unit 3 does not contain any fossils except plant debris, indicating a fluvial plain environment. Unit 4, characterized by a layer of mottled clay that is widely distributed in the Pearl River Delta area, is completely barren of fossils, representing an interval of continental weathering. Unit 6 bears only non-marine ostracods and was deposited on a fluvial plain. Combining foraminiferal and ostracod data with geochemical and susceptibility records allows to establish the following environmental stages in this area; A. Delta front stage (25 100～24 000 aB. P. ) ; B. Estuary stage (24 000～22 400 aB. P. ) ; C. Fluvial plain stage (22 400～21 700 aB. P. ) ; D. Continental weathering stage (21 700 ～ 3 700 aB. P. ) ; E. Tidal flat stage ( 3 700～2 600 aB. P. ) , and F. Upper fluvial plain stage (since 2 600 aB. P. ). In the Late Quaternary sedimentary succession two transgression-regression cycles can be recognized in the study area, corresponding to stages A to D and E to F, respectively. The palaeoenvironmental changes are believed to have been controlled by fluctuations of sea level.关键词
珠江三角洲/晚第四纪/有孔虫/介形类/环境演化Key words
Pearl River Delta/Late Quaternary/foraminifers/ostracods/environmental change分类
天文与地球科学引用本文复制引用
董艺辛,刘春莲,阴家润,杨小强,Franz T.F(U)RSICH,高芳蕾..珠江三角洲晚第四纪环境演变的微体生物记录[J].古脊椎动物学报,2007,45(2):161-172,12.基金项目
国家自然科学基金重点项目(编号:40331007)和面上项目(编号:40272011)、广东省自然科基金项目(编号:04009757)资助.This research was funded by the Natural Science Foundation of China ( Grant No. 40331007 and 40272011 ) and the Natural Science Foundation of Guangdong Province ( Grant No. 04009757 ) , respectively. （编号:40331007）
