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Seasonal Changes in Magnetic Properties of Surficial Tidal Flat Sediment and Their Response to Sedimentation Dynamics: a case study from the coast of the Hangzhou Bay
Author(s): 
Pages: 267-273
Year: Issue:  2
Journal: ACTA SEDIMENTOLOGICA SINICA

Keyword:  沉积物磁性特征沉积动力潮滩杭州湾;
Abstract: 根据2004年9月-2005年8月杭州湾北岸中潮滩固定观测点重复采集的表层沉积物的磁学参数和粒度分析,探讨了研究区域潮滩沉积物磁学性质的季节性变化及其对沉积动力的响应.结果表明, 该观测点潮滩沉积物磁学参数存在显著的月际变化,2004年12月底-2005年5月上旬的半年中,SIRM、χARM、χfd%、χARM/χ、χARM/SIRM等参数出现高值,指示了沉积物中含有较多的细晶粒亚铁磁性矿物,对应于潮滩淤积时段和较细的沉积物粒级组成,其余各月上述磁参数值较低,对应于潮滩沉积物较粗的侵蚀期.上述结果表明,沉积物的磁性特征可以很好地反映潮滩冲淤过程中沉积动力的变化.
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