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用仪器中子活化法(INAA)对南极菲尔德斯半岛西湖钻孔沉积物和植物残体进行了多元素测定。发现沉积物和植物残体在不同沉积深度分别有相似的元素分布模式;并且二者的元素分布特别是稀土元素分布模式也具有相似性,反映出二者的物源基本相同。植物残体中不同元素的生物富集系数有差异,反映了植物吸收元素的选择性。植物残体中许多元素呈现出明显的规律性变化,初步推测植物残体的元素组合特征对环境变化的响应可能比沉积物更灵敏。
The multi-element determination of borehole sediments and plant residues in the West Lake of the Fildes Peninsula, Antarctica was carried out by instrumental neutron activation (INAA). It is found that sediment and plant remnant have similar pattern of elemental distribution at different sedimentary depths, and their elemental distributions, especially the pattern of REE distribution, are also similar, reflecting that the source of the two are basically the same. There are differences in the bioaccumulation coefficients of different elements in plant residues, reflecting the selectivity of plant absorption elements. Many elements in plant residues showed obvious regularity changes. It is preliminarily presumed that the elemental combination characteristics of plant residues may be more sensitive to environmental changes than sediments.