山东省威海市刘公岛周边海域海底沉积物粒度特征及沉积动力环境研究

Study on Characteristics of Grain Size and Sedimentary Dynamic Environment of Seabed Sediments in the Sea Areas around Liugong Island

摘要:

为系统分析刘公岛周边海域沉积物粒度特征及沉积动力环境，本次研究在充分收集以往资料的基础上，结合本次测试结果，对沉积物类型及粒度特征进行了总结。研究结果表明：区内沉积物类型主要有4种，分别为含砾泥（(g)M）、砾质泥（gM）、砂质粉砂（sZ）、粉砂（Z），其中砂质粉砂与粉砂分布最广；区内平均粒径整体呈东南向西北递增的趋势，分选性整体为差，偏态属于正偏范畴，峰态以中等型为主；区内沉积物整体位于三角图的左上部位，黏土和粉砂两端沉积物很少，表明区内水动力条件整体较弱。

Abstract:

In order to systematically analyze the characteristics of grain size and sedimentary dynamic environment of sediments around Liugong Island, on the basis of fully collecting the previous data, combining with the test results, characteristics of the sediment types and grain size have been studied summarized. It is showed that there are four main sediment types in the area, namely (g) M-gravel mud, gM-gravel mud, sZ-sandy silt and Z-silt. Among them, sandy silt and silt are the most widely distributed. The average particle size in the area increases from southeast to northwest. The sorting ability is poor, the skewness belongs to the positive skewness category, and the peak is mainly medium type. The overall sediment in the area is located in the upper left part of the triangle diagram, and there are few sediments at both ends of the clay and silt. It is indicated that the overall hydrodynamic conditions in the area are weak.