| 太湖14000年以来古环境演变的湖泊记录 |
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| 引用本文： | 瞿文川,薛滨,吴艳宏,王苏民,吴瑞金,张平中,陈践发.太湖14000年以来古环境演变的湖泊记录[J].地质力学学报,1997,3(4):52-61. |
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| 作者姓名： | 瞿文川 薛滨 吴艳宏 王苏民 吴瑞金 张平中 陈践发 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所,中国科学院南京地理与湖泊研究所,中国科学院南京地理与湖泊研究所,中国科学院南京地理与湖泊研究所,中国科学院南京地理与湖泊研究所,中国科学院兰州地质研究所,中国科学院兰州地质研究所 |
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| 基金项目： | 中国科学院重大项目和中国科学院湖泊调查分类第二轮联合资助 |
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| 摘 要： | 本文根据东西太湖短柱岩芯的沉积物的物理，化学，生物指标的综合分析，讨论了该区距今１４ｋａ来的古气候变化过程，结果表明１４．３－１３．３ｋａＢＰ，太湖水位低，环境指标甚至表现为暴露特征，反映了气候干旱；１３．３－１２．４ｋａＢＰ为偏暖湿的过渡阶段；该孔柱２７０－２８０ｃｍ（１１．５ｋａＢＰ左右）各类指标均明显反映冷干特征，可能是ＹｏｎｇｅｒＤＲａｙｓ事件的记录，与我国东部其他地区有可比性，约１０．９
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| 关 键 词： | 太湖 古环境演化 湖泊 沉积记录 沉积物 |
RECORD OF PALEOENVIRONMENTAL EVOLUTION OF TAIHU LAKE IN THE PAST 14000 YEARS |
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| Qu Wenchuan,Xue Bin,Wu Yanhong,Wang Sumin,Wu Ruijing,Zhang Pingzhong and Chen Jianfa.RECORD OF PALEOENVIRONMENTAL EVOLUTION OF TAIHU LAKE IN THE PAST 14000 YEARS[J].Journal of Geomechanics,1997,3(4):52-61. |
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| Authors: | Qu Wenchuan Xue Bin Wu Yanhong Wang Sumin Wu Ruijing Zhang Pingzhong and Chen Jianfa |
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| Institution: | Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences,Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences,Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences,Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences,Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences,Lanzhou Institute of Geology, Chinese Academy of Sciences and Lanzhou Institute of Geology, Chinese Academy of Sciences |
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| Abstract: | From the analysis of the magnetic susceptibility,TOC,TN,pigment,organic carbon isotope,HI,saturated hydrocarbon and 14C dating etc.of the sediment samples from cores of two boreholes in the Taihu lake,a knowledge of the evolution of paleoenvironment of the lake during the last 14ka is achieved.The results show that the lake has undergone the following stages:The Lake was at a low level,or even became exposed during 14.3-13.3kaBP,reflecting an arid climate.There existed a transitional stage during 13.3-12.4kaBP,the climate being slightly warm and wet.There are indications of a cold and dry climate around 11.5kaBP,probably corresponding to the Younger Drays event,comparable with other areas in east China.10.9-10kaBP is obviously a warm period with a reducing environment and relatively deep water.There was a alternation of cool and warm climate during 10-7.2kaBP.It was warm and wet during 7.2-5.737kaBP.Many climate indicators changed suddenly in 5.05kaBP,probably a reflection of change in material source and a sedimentation break.The uppermost surficial sediment shows features of a modern environment.The West Taihu Lake is of algae-type with high production and high eutrophication and is characterized by oxidation environment and flourishing algae.The East Taihu Lake is of macrophyte-type with low production and low eutrophication where the organic material mainly came from the exuberant aquatic vascular plants. |
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| Keywords: | Taihu Lake paleoenvironmental evolution record of lake deposits |
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