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本研究选择了三个深水盆地,并对反映在最上部15～30cm的新近变化作了报道。哥特兰盆地是波罗的海南部最大的连续沉积盆地,选作为本研究的对象。同时研究了另一个相当大盆地,即波罗的海中北部盆地,并首次报道那里的地球化学特征。还研究了在波罗的海北部的博恩霍尔姆盆地。这三个盆地从海区的地球化学条件方面是不相同的。所研究的元素按其来源和地球化学特性分为不同的组:陆地自然来源的元素、营养物、与早期成岩矿物相结合的元素,和近表层带内人类活动带入的元素,包括一些有害金属。表层带中金属浓度虽然呈现减少趋势,但仍然明显增高。
Three deepwater basins were selected for this study, and recent changes reflected in the uppermost 15-30 cm were reported. The Gotland Basin is the largest continuous sedimentary basin in the southern part of the Baltic Sea and was selected for this study. At the same time, another relatively large basin, the central-northern Baltic Basin, was studied and the geochemical characteristics there for the first time. Also studied in the Bornholm Basin in the northern Baltic Sea. The three basins are not the same in geochemical conditions of the sea area. The studied elements are grouped into groups according to their source and geochemical characteristics: elements of natural origin from the land, nutrients, elements associated with early diagenetic minerals, and elements brought into by human activities in the near-surface zone, including some harmful metal. Although the metal concentration in the surface zone shows a decreasing trend, it is still obviously higher.