珠江三角洲第四纪沉积年代学研究

ON QUATERNARY SEDIMENTARY CHRONOLOGY OF THE ZHUJIANG DELTA

根据珠江三角洲366个绝对年代数据,结合岩相、古生物、化学、矿物等的研究,认为珠江三角洲形成可用绝对年代大致划分出5个堆积阶段。并讨论了某些沉积物样品年代偏差问题。

According to the ^(14)C-dating data (171 data are measured by the authors and 162 by other laboratories) and thermolu-minescence dating data (27 data are measured by the authors and 6 by other laboratories), it is considered that the Zhujiang Delta began to deposit in middle phase of Late Pleistocene.Combining with the researches in the petro-facies, palaeobiology, chemistry and mineral, the authors consider that the formation of the Zhujiang Delta may be divided into five stages: Q_3^(2-1) fluvial alluvial stage; Q_3^(2-2) fossil delta accumulating stage; Q_3~3 erosion and fluvial alluvial stage; Q_4~1-Q_4~2 neogenic delta accumulating stage; Q_4~3 modern delta accumulating and expanding stage. The problem about sedimentary age error is also discussed in this paper.