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The Particle Size Characteristics and Origin of Hard Clay in the Central Area of Chenghu Lake,Jiangsu Province,China
Pages: 828-832
Year: Issue:  5
Journal: Acta Sedimentologica Sinica

Keyword:  澄湖硬粘土粒度太湖平原长江;
Abstract: 澄湖是太湖平原上的一个浅水湖泊,湖底十分平坦,主要由硬粘土组成,同时发育有NW-SE横穿澄湖的古河道和泥沼洼地.在接近湖泊中心部位的古河道中打钻获得了4 m长的岩芯,并进行了详细的粒度分析.结果表明,该岩芯下部的硬粘土主要由细粉砂、中粉砂和粘土组成,分别占26.7%~38.1%,26.9%~34.3%和19.7%~26.2%,可命名为粘土质粉砂;众数粒径为10~50 μm,平均占57.9%;平均粒径为6.3~6.Φ.将其与上部的湖泊沉积、镇江下蜀黄土和中国北方各地黄土的粒度比较表明,苏州澄湖湖底的硬粘土原本也是风尘沉积.
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