华东地质2025，Vol.46Issue(4)：479-488,10.DOI:10.16788/j.hddz.32-1865/P.2024.09.005
里下河平原高邮湖地区全新世年代地层格架和湖沼变迁
Holocene chronostratigraphic framework and limnological changes of Gaoyou Lake area,Lixia River Plain
摘要
Abstract
The Lixia River Plain,situated on the western North Jiangsu Basin,serves as a critical archive recording land-ocean interactive sedimentation and Holocene environmental evolution in coastal zones.Due to the inadequacy of quantity and quality of data,the debates over its sedimentary chronology still remain.This study identified the Holocene stratigraphic framework in the local by employing AMS14C dating to interprete the trough-shaped drilling profiles in the Gaoyou Lake area.Results reveal four distinct environmental stages:①11600～8 000 a BP,the sedimentation environment was characterized by low water-level lake-marsh systems and is not significantly affected by seawater;②8 000～4 000 a BP,marked by maximum marine transgression forming tidal flats and lagoons,with seawater reaching modern Gaoyou Lake,driven by Holocene rapid sea-level rise;③4 000～800 a BP,dominated by marine regression due to increased Huai River sedimentation,leading to the recovery of freshwater lake-marsh environment;④since 800 a BP,integrated with human-induced transfor-mations,the Yellow River's southward shift into the Huai River system triggered rapid sedimentation of Lixia River Plain,disconnecting the region from marine influence and reshaping its water-system.This study establish-es a robust Holocene chronostratigraphic framework,and clarifies regional stratigraphic correlation and human-environment interactions.关键词
全新世/年代地层格架/环境变化/高邮湖地区/里下河平原/苏北盆地Key words
Holocene/chronostratigraphic framework/environmental change/Gaoyou Lake area/Lixia Riv-er Plain/North Jiangsu Basin分类
天文与地球科学引用本文复制引用
ZHOU Xiaohua,JIANG Ren,ZENG Jianwei,LIU Kai,LI Changbo,ZHANG Yong,ZHAO Ling,MA Xue..里下河平原高邮湖地区全新世年代地层格架和湖沼变迁[J].华东地质,2025,46(4):479-488,10.基金项目
江苏省重大科技示范"碳达峰碳中和科技创新专项资金(编号:BE2022859)"和中国地质调查局"重要经济区与新型城镇区域地质调查(编号:DD20240025)""长三角经济区区域地质调查(编号:DD20230201)"项目联合资助. （编号:BE2022859）
