舒军武,王伟铭,陈晔

• 1:中国科学院南京地质古生物研究所
• 2:中国科学院南京地质古生物研究所
• 3:南京师范大学地理科学院 江苏南京210008
• 4:江苏南京210008

摘要(Abstract)：

粒度、磁化率定量数据分析在判明第四系沉积物的来源、识别沉积分异作用、解译古沉积相和环境方面有着重要作用。对太湖平原西北部卜弋桥ZK01钻孔上部全新统如东组进行了粒度和磁化率测试分析,结合该孔孢粉成果,揭示研究区全新世古河道沉积环境和气候明显经历了3个阶段:1)11000—9500cal.aBP,沉积物主要由粉砂组成,粒度证据表明水动力条件较强,孢粉证据显示该阶段气候较温暖湿润;2)9500—3900cal.aBP,沉积物砂组分含量大幅增加,粒度资料显示古河道水动力明显增强,孢粉植被表明该时期处于全新世大暖期,气候暖湿稳定;3)3900cal.aBP以来,粉砂组分在沉积物中占优势,粒度结果表明该阶段水动力显著减弱,孢粉资料和磁化率证据表明研究区自该阶段特别是后期以来逐步出现了明显的人类活动迹象。

关键词(KeyWords)： 粒度;磁化率;孢粉;古河道;环境演变;全新世;第四纪;太湖平原;江苏

Abstract:

Keywords:

基金项目(Foundation): 中国国家自然科学基金(No40571152);; 德国大众汽车基金(No:I/78365);; 中国科学院知识创新工程重要方向项目(KZCX2-YW-105)

作者(Author): 舒军武,王伟铭,陈晔

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