东海内陆架泥区沉积物的环境敏感粒度组分
A Study on Environmentally Sensitive Grain-size Population in Inner Shelf of the East China Sea
查看参考文献54篇
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文摘
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对东海内陆架泥质沉积区的DD2孔和悬浮体进行了陆源物质提取,应用激光粒度仪做了粒度分析,并分析了DD2孔粒度参数的垂向分布序列.通过计算粒级-标准偏差的变化获得了DD2孔沉积物中对沉积环境变化较为敏感的粒度组分,约19和130μm是DD2孔所属区域对沉积环境敏感的粒级,分别对应于东海沿岸流和风暴流沉积动力过程.敏感粒度组分含量随深度变化的分析表明,该孔上段的沉积作用主要受控于沿岸流,沉积环境相对稳定;而下段沉积环境变化大,是风暴流和沿岸流的混合作用沉积的结果. |
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其他语种文摘
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Grain-size distribution of 149 sediment samples of Core DD2 and 3 suspended sediment samples, pretrea-ted by removing the organic matter and carbonate, are measured by use of Malvern 2000. The sampling sites are loca-ted in the inner shelf of the East China Sea. Vertical distribution of grain-size parameters of Core DD2 is studied. Standard deviations are calculated for all 149 samples. Two peaks are observed in plot standard deviation values vs. grain-size classes, at about 19 and 130μm grain size, respectively. They are environmentally sensitive grain-size pop-ulation. And about 19μm is sensitive to coastal current of the East China Sea, the other is to storm current. Each of these size classes represents a population of grains with the highest variability through time. Vertical contents of sensi-tive grain-size population are carried out. It shows that the sedimentations of upper Core DD2 was controlled by coastal current and was in relatively stable environment. This result is supported by the comparison analysis between the mod-ern suspended sediments and Core DD2. And lower part was controlled by combination of coastal and storm currents and was in unstable environment. |
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来源
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沉积学报
,2005,23(1):122-129 【核心库】
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关键词
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粒度组分
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陆源物质
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东海内陆架
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地址
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中国科学院海洋研究所, 山东, 青岛, 266071
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-0550 |
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学科
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海洋学 |
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基金
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中国科学院海洋研究所知识创新工程项目
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文献收藏号
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CSCD:1879231
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