长城湾沉积物中微量元素的中子活化分析

A determination of trace elements in sedimentsfrom the Great Wall Bay by neutron activation analysis

本文采用中子活化分析法测定了南极长城湾表层沉积物中的微量元素,定量地给出了Au、Ag、La、Ce、Nd、Sm、Eu、Tb、Yb、Lu、U、Th、Cr、Ir、Zr、Hf、Ba、Sr、Cs、Ni、Sc、Rb、Zn、Ta、Co、As、Sb、W等28种元素的含量,测定不准确度为3～5％。根据测定数据所做的稀土元素配分模式图表明,不同地段沉积物的组成有所不同。有些元素的含量明显高于克拉克值,有的站位Au、Ag的含量接近工业边界品位。

In this paper, a neutron activation analysis was used to determine trace elements in the surface sediments of the Great wall Bay, Antarctica.The contents of 28 elements were given quantitatively.These elements are Au, Ag, La, Ce, Nd, Sm, Eu, Tb, Yb, Lu, U, Th, Cr, Ir, Zr, Hf, Ba, Sr, Cs, Ni, Sc, Rb, Zn, Ta, Co, As, Sb, and W.The uncertainty of determination is 3 to 5 percent.The REE patterns drawn from the measurement data show that contents of some elements in the samples are very different from their Clark values.The contents of Au and Ag for some stations are lose to the industrial tenor.