南海西部海盆深海沉积物物理性质初探

发布时间：2018-05-19 18:14

本文选题：南海西部 + 深海沉积物　；参考：《中国海洋大学学报(自然科学版)》2017年10期

【摘要】：针对从中国南海西部某海域2 000多米水深水域采集的柱状样和表层样进行初步分析,探究该区域海底沉积物的基本物理性质,获得天然含水率、天然密度、比重、孔隙比、液塑限、粒度特征等指标。结果表明:南海西部深海沉积物类型均为黏土,相比于近海沉积物,具有高含水率、低密度、高孔隙比、高液塑限和高黏粒含量等特点;不同站位沉积物物理性质略有差异,柱状样物理性质随沉积深度不同稍有波动;沉积物的天然含水率远大于液限,属于一种高敏感度黏性土,且其高塑性指数的特征与黏粒含量较高有关。该研究获得的南海深水域土样基本物理性质为今后对该海域沉积物研究及进行相关海洋工程建设提供重要的参考数据。
[Abstract]:Based on the preliminary analysis of columnar and surface samples collected from more than 2,000 meters of water depth in a certain sea area in the western part of the South China Sea, the basic physical properties of seafloor sediments in this area are explored, and the natural moisture content, natural density, specific gravity and porosity ratio are obtained. Liquid plastic limit, particle size characteristics and other indicators. The results show that the types of deep-sea sediments in the western part of the South China Sea are clay, which have the characteristics of high water content, low density, high porosity, high liquid plastic limit and high clay content, and the physical properties of sediments at different stations are slightly different. The physical properties of columnar samples fluctuate slightly with the depth of deposition, and the natural moisture content of sediment is much larger than the liquid limit, which belongs to a kind of highly sensitive clay, and the characteristics of its high plasticity index are related to the high content of clay. The basic physical properties of soil samples in the deep waters of the South China Sea obtained by this study provide important reference data for the study of sediment and the construction of related marine engineering in this area in the future.
【作者单位】：大连理工大学海岸和近海工程国家重点实验室;
【基金】：国家自然科学基金项目(41572252)资助~~
【分类号】：P642;P736.21

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