琼东南外海海底沉积物粒度组分对孔隙度、声速的影响

Journal of Tropical Oceanography(2016)

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Abstract
海底沉积物粒度组分影响和控制着沉积物的声学特性和物理性质,具有明显的区域性特点。文章测定了琼东南外海海底沉积物的声速、孔隙度以及沉积物粒度组成,讨论了他们的相互关系。琼东南外海海底沉积物纵波波速变化范围为1455~1773m×s-1,由琼东南外海的东北至南部海域,可分别划分为低声速沉积物区、高声速沉积物区、低声速沉积物区和高声速沉积物区。沉积物孔隙度回归方程和声波回归方程表明,沉积物类型从砂、粉砂质砂、黏土质粉砂、砂-粉砂-黏土到粉砂质黏土变化,声速总体呈减小的趋势,孔隙度呈明显的增大趋势。
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Key words
seafloor sediment,grain size,porosity,sound velocity,offshore of southeastern Hainan Island
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