人工半封闭港湾有孔虫埋葬群空间分布研究--以江苏连云港港区为例

连云港港区60个表层沉积样品的定量分析表明,与港区水动力、底形等沉积环境条件相适应,该区有孔虫埋葬群可分为口门、湾中、湾顶三大群个组合,并可进一步区分出若干六个亚类组合：（A）湾项浅水区——丰度值最低,胶结壳有孔虫含量最高,活体含量高;（B）鸽岛沉积区——与A紧邻,但以丰度值高相区别;（C）西岸码头深水区——水深,丰度高,活体少,浮游个体多;（D）东侧浅水区——水浅,埋葬群特征与C相近;（E）涨潮三角洲区--沉积物粒径小,丰度高,胶结壳含量最低;（F）口门高能区——以沉积物粒径较低区别于E区.

Distribution of Foraminifera in a Semi-closed Artificial Bay: a Case Study of Lianyungang Port

The quantitative analyses of sixty samples from the Lianyungang Port reveal that, three foraminifera thanatocoenoses are distinguished: mouth, middle part and head of the bay, as a consequence of its hydrodynamics, bed form and other factors. Furthermore, six sub-types can be divided into: ( A ) the bay head shallow-water area, characterized by its low abundance, high percent of agglutinated and living individuals, ( B ) the Pigeon Island sediment area, adjacent to A, but with a higher abundance; ( C ) the western deep-water area, with deep water, high abundance and high percentage of planktonic foraminifera, ( D ) the eastern shallow-water area, which has a lower water depth than D, ( E ) the flood tide delta, with fine sediment and the lowest percentage of agglutinated individuals; and ( F ) the high energy area near the bay mouth, different from E by its relative sediment.