| 崎岖列岛海域沉积物粒度特征比较研究 |
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| 引用本文： | 李玉中.崎岖列岛海域沉积物粒度特征比较研究[J].海洋地质动态,2014,30(5):1-8. |
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| 作者姓名： | 李玉中 |
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| 作者单位： | 上海市海洋规划设计研究院; |
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| 基金项目： | 上海市海洋局科研专项“江海联动水动力水质基础调查及数值模拟研究”(沪海科2011-06);“上海市科技兴海战略研究”(2013-05);“长江口杭州湾水域纳污能力及限制排污总量研究”(2014-01) |
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| 摘 要： | 崎岖列岛海域表层沉积物平均粒径在0.1~0.2mm之间的细砂通常具有较好的分选性,平均粒径细于4Φ的沉积物通常分选性较差;平均粒径在4.5Φ~7.5Φ的沉积物通常表现为正偏态,且粒度越粗,偏度越正偏;平均粒径粗于4Φ的砂质沉积物偏度无显著的正偏或负偏倾向;崎岖列岛海域中值粒径位于4Φ~5Φ的样品数较少,因该粒级位于悬移质与跃移质之间。
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| 关 键 词： | 粒度特征 沉积物 分选 偏度 粒度缺失 崎岖列岛海域 |
COMPARATIVE STUDY OF SEDIMENT GRAIN-SIZE FEATURES OF THE QIQU ISLANDS |
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| LI Yuzhong.COMPARATIVE STUDY OF SEDIMENT GRAIN-SIZE FEATURES OF THE QIQU ISLANDS[J].Marine Geology Development,2014,30(5):1-8. |
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| Authors: | LI Yuzhong |
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| Institution: | LI Yuzhong (Shanghai Ocean Planning and Design Research Institute, Shanghai 200233, China) |
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| Abstract: | Comparison of grain-size features of surficial sediments between the Qiqu Islands area and other areas is made with the data from published papers. The higher sorting is often found in the sedi- ments with mean grain size of 0.1~0. 2 mm, while the fine sediments are often badly sorted. Positive skewness is often in company with sediments whose mean grain sizes are between 4.5φ~7.5φ, and the coarser the sediments, the more positive the skewness. The skewness of the sediments coarser than 4φ shows no distinctly negative or positive tendency. Sediments in median grain size of 4φ~5φ are are less common in the Qiqu Islands area, perhaps because the sediments are between suspension and saltation loads. The deficiency of the components may be the reason to cause the positive skewness of the sediments finer than 4φ. |
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| Keywords: | grain-size feature sediment sorting skewness grain size deficiency Qiqu Islands |
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