威海湾表层沉积物地球化学特征及影响因素分析

Geochemical Characteristics and Influencing Factors of Surface Sediments in Weihai Bay

摘要:

本文系统分析了威海湾海域表层沉积物地球化学特征，结果表明：沉积物中常量组分含量整体呈西南低、东北高的趋势，与平均粒径呈负相关关系，元素丰度呈接近状态。沉积物中微量元素含量整体呈西高东低的态势，与平均粒径呈正相关关系，元素丰度呈富集状态。通过计算富集系数、污染因子，认为表层沉积物含量与沉积物粒径、入海碎屑物、人类工程活动等息息有关。

Abstract:

Geochemical composition of surface sediments is restricted by material source, grain size and sedimentary environment. It has a great significance for understanding sediment sourcesink processes and paleoenvironmental evolution. In this paper, geochemical characteristics of surface sediments in Weihai bay have been systematically analyzed. It is showed that the content of major components in sediments is lower in southwest and higher in northeast. It is negatively correlated with the average particle size, and the element abundance is close. The content of trace elements in sediments is higher in the west and lower in the east. It is positively correlated with the average particle size, and the element abundance is enriched. In addition, by calculating the enrichment coefficient and pollution factors, it is found that the sediment content is related to the sediment particle size, detritus into the sea, human engineering activities and so on.