摘要
以１９８９～１９９２年辽宁省海岛资源综合调查中海洋地质、海洋沉积资料为基础，通过对表层沉积物类型、粘土矿物和６个柱样２１０Ｐｂ沉积速率的分析，研究了长山群岛海区现代沉积特征。结果表明，该区沉积物类型分布与一般浅水海域近岸粗远岸细的泥沙分布规律截然不同，呈现出近岸细远岸粗、从西北向东南变粗的总趋势；４种主要粘土矿物的含量伊利石＞高岭石＞绿泥石＞蒙脱石，矿物组成明显受控于大陆沿岸河流输砂；沿岸河口区的沉积速率大于浅海区。
Based on the marine geological and sedimentary data from the comprehensive survey of the island resources of Liaoning during 1989～1992 and the analysis of the surface sediment sorts,distribution of the clay minerals and modern sedimentation rate of 6 cores by 210 Pb,the modern sedimentation feature in the sea area around Changshan Archipelago was studies.The result showed that the fine sediment is in nearshore and coarse one is far from the coast.The distribution of the sediment type is obviously different from the normal distribution rule of silt around the shallow sea.The contents of 4 clay minerals are illite>kaolinite>chlorite>montmorillonite respectively.The sedimentation rate around the estuaryies is greater than in the shallow sea area.
出处
《海洋环境科学》
CAS
CSCD
北大核心
1998年第2期35-39,共5页
Marine Environmental Science
关键词
长山群岛
沉积特征
沉积速率
海洋沉积物
Changshan Archipelago
sedimentation feature
sedimentation rate
