关键词: 苏州澄湖, 晚更新世晚期, 古环境, 演变

Abstract:

Based on the analyses of grain size, magnetic susceptibility, sporopollen, foraminifera, lithology and AMS14C from SC1 core in Chenghu Lake, this paper discusses the evolutions of climate and paleoenvironment since Late Pleistocene.The records of sporopollen show that climate is accord with the worlds: warmwet during the Late Pleistocene, a cool and dry climate during the last glaciation, warmwet in the Early Holocene, a hotwet climate in the Middle Holocene, cooldry to warmmoist during the Late Holocene; Two marine invasion events are discovered, one is Gehu during Late Pleistocene and the other is Zhenjiang in the Middle Holocene.This district has undergone great palaeogeographic changes since Late Pleistocene: rivers in the Late Pleistocene, rivers and marshlands during the last glaciation, flood plainestuary during the Early Holocene, estuaryshallow marine in the Middle Holocene, lakes and marshlands during the Late Holocene.

Key words: Chenghu Lake of Suzhou, Late Pleistocene, paleoenvironment, evolution