黄河三角洲HS908孔处滨海湿地发育与演变

Development and Evolution of Coastal Wetland in Yellow River Delta at the Relling Hole HS908

黄河三角洲滨海湿地是在陆地和海洋动力相互作用下,黄河所携带的泥沙物质逐渐发育、演化形成的滨海湿地系统。在前人研究的基础上对黄河三角洲滨海湿地在横向上的演化特征进行了分析,并对沉积体叶瓣的形成和发育过程进行了划分。以HS908孔的粒度、有孔虫、孢粉、测年等数据为基础对黄河三角洲滨海湿地在垂向上的演化序列进行划分,认为其在垂向上为浅海沉积相之上,不同时期叶瓣的叠覆体。黄河三角洲在横向上的叶瓣展布和垂向上的叶瓣叠加共同组成了该地区滨海湿地的发育和演化过程。

The coastal wetland in the Yellow River Delta is a wetland system formed gradually on the basis of the sediments delivered by the Yellow River and under the interaction of land and sea power. On the basis of previous studies, the lateral evolution of the coastal wetland in the Yellow River Delta is analyzed, and the formation and developing processes of the lobe-shaped sedimentary bodies are divided. Based on the data of grain size, foraminifera, pollen and dating from hole HS908, the vertical evolution sequence of the wetland is also divided. It can be believed that the sedimentary lobes are the overlapping bodies formed above the neritic facies during different periods. Bothe the lateral distribution patterns and the vertically overlapping of the sedimentary lobes can explain the development and evolution processes of the coastal wetland in the Yellow River Delta.