| 渤海LZK06孔25万年沉积物粒度特征及沉积环境意义 |
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| 引用本文： | 王忱沛,李琰,商志文,姜兴钰,李建芬,胡克,王宏.渤海LZK06孔25万年沉积物粒度特征及沉积环境意义[J].海洋科学进展,2022,40(1):66-78. |
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| 作者姓名： | 王忱沛 李琰 商志文 姜兴钰 李建芬 胡克 王宏 |
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| 作者单位： | 中国地质大学（北京）海洋学院;德国莱布尼兹应用地球物理研究所;海南省海洋地质资源与环境重点实验室;中国地质调查局天津地质调查中心 |
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| 基金项目： | 国家自然科学基金项目——渤海海岸晚更新世海侵事件的长石光释光年代学研究(41907376);北京市自然科学基金项目——华北平原东部全新世海陆相沉积年代学与古环境对比研究(8204070);教育部中央高校基本科研业务费启动项目——海岸带—浅海沉积物光释光年龄的粒度效应研究(2652018064)。 |
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| 摘 要： | 对渤海北岸大凌河冲积平原的LZK06孔上部60 m沉积物开展了粒度测试,分析了粒度特征变化规律,探讨了控制粒度特征变化的因素及其对环境演化的指示.结果 显示,LZK06孔沉积物以下部陆相沉积和上部海陆交互相沉积为特点.LZK06孔沉积物粒度整体较粗,指示了较强的沉积水动力.整体上海相沉积物粒度略粗于下伏陆相沉积物.地层...
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| 关 键 词： | 粒度 敏感组分 沉积环境 古环境变化 渤海 |
Grain-Size Characteristics and Its Environmental Significance of Sediments From Core LZK06 in the North Bohai Coast During the Last 250 ka |
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| WANG Chen-pei,LI Yan,SHANG Zhi-wen,JIANG Xing-yu,LI Jian-fen,HU Ke,WANG Hong.Grain-Size Characteristics and Its Environmental Significance of Sediments From Core LZK06 in the North Bohai Coast During the Last 250 ka[J].Advances in Marine Science,2022,40(1):66-78. |
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| Authors: | WANG Chen-pei LI Yan SHANG Zhi-wen JIANG Xing-yu LI Jian-fen HU Ke WANG Hong |
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| Institution: | (School of Ocean Sciences, China University of Geosciences, Beijing 100083, China;Leibniz Institute for Applied Geophysics, Hanover 30655, Germany;Hainan Key Laboratory of Marine Geological Resources and Environment, Haikou 570206, China;Tianjin Geological Survey Centre, CGS, Tianjin 300170, China) |
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| Abstract: | This study measured grain-size for the sediments collected from upper 60 m of core LZK06 in the Dalinghe alluvial plain,the North Bohai Coast,described the change of grain-size characteristics,and discussed the driving factors for variations of grain size and their response to environmental evolution.The results show that the sediments are characterized as terrestrial-marine interbedded deposits in the upper 60 m of the core LZK06.The grain-size is overall coarse,indicating the strong hydrodynamics.Grain-size of marine sediments are generally coarser than those in the underlying terrestrial stratum.The characteristics of sediments,combined with the chronological framework,reflect that the region has experienced three transgression-regression cycles in the North Bohai Coast during the last 250 ka.The dominant factor of sediment grain-size is likely to be variation of the hydrodynamic and sediment concentration of the Dalinghe River under the background of paleoclimate evolution.Currents and waves reworked on the grain-size distribution during transgression period. |
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| Keywords: | grain-size sensitive component sedimentary environment palaeoenvironmental change Bohai Sea |
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