| 渤海南部Lz908孔海陆交互沉积的粒度特征及其对沉积环境的指示 |
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| 引用本文： | 李琰.渤海南部Lz908孔海陆交互沉积的粒度特征及其对沉积环境的指示[J].海洋科学,2014(4). |
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| 作者姓名： | 李琰 |
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| 作者单位： | 中国地质大学（北京） |
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| 基金项目： | 黄土与第四纪地质国家重点实验室开放基金（批准号：SKLLQG1018），我国近海海洋综合调查与评价专项（批准号：908-01-ZH2）和海洋公益性行业科研专项（批准号：201105020）联合资助 |
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| 摘 要： | 文章对采自莱州湾南岸的钻孔沉积物样品进行了粒度测试和分析。样品平均粒径介于3.3-6.8?，以极细砂和粗粉砂为主，含有少量的粘土质；分选较差；偏度表现为正偏和极正偏；沉积物粒度表现为正态、正态—尖锐和尖锐，少数表现为平坦和极尖锐。粒度象指示了历史时期持续高的初始沉积水动能和多种沉积环境的变化，粒度参数散点图反映了多种动能影响了沉积物的沉积改造，综合判别分析对沉积环境的限定，得到了莱州湾南岸沉积物受到河水径流、潮流、波浪等共同作用形成。沉积物总体反映了莱州湾南岸长时期处于河流相和三角洲相的沉积环境，少数较细的粒度表现可能与研究区的多期海侵过程相对应。
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| 关 键 词： | 粒度 沉积环境 莱州湾 海岸带 |
Grain-size characteristics and its sedimentary significance of coastal sediments of the borehole Lz908 in the south Bohai Sea (Laizhou Bay), China |
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| liyan.Grain-size characteristics and its sedimentary significance of coastal sediments of the borehole Lz908 in the south Bohai Sea (Laizhou Bay), China[J].Marine Sciences,2014(4). |
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| Authors: | liyan |
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| Institution: | China University of Geosciences |
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| Abstract: | Sediment samples from the borehole Lz908 of Laizhou Bay were employed here for the grain-size and sedimentary analyses. The results show that the average grain size is 3.3-6.8? with poor sorted, fine skewed and Platykurtic, which means the grain sizes range from coarse silt to very fine sand. The sediments settled in the southern Laizhou bay were controlled by the river, tide and wave, and the fluvial effect is the dominant factor. It is inferred that the sediments deposited in a deltaic environment. |
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| Keywords: | Grain size Sedimentary environment Laizhou Bay Coastal Zone |
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