关键词: 稀土元素;物质来源;燕窝湖岩芯;长城站;南极

Abstract:

The Yanwo Lake, situated in King George Island at 62°13'14"S and 58°57'58"W, the height above sea level of drill hole is 14.5m and depth is 7. 7m. Based on the analysis of rare earth element (REE) in the sediments from the Great Wall Station.the source of sediments is discussed in this paper. The concentration, distributions of Yanwo Lake Core are dis cussed. The results of analysis show that the ∑ REE values of the sidiments of Yanwo Lake Core vary over a range of 51. 8-89. 2 ppm. with .an average of 70. 2 ppm. The small range of variation of ∑REE indicates the fine to the coarse. As viewed from the results of the analysis in different sidements Yanwo Lake Core,there is a general tendency For ∑ REE to decrease from the subclay with fine sand to the fine sand with gravel. These showed the deposition range obviously near to the erosion origin region. The glacial environment of the aridity is play a leading role. The chemical weathering us vary faint. The results of study show that the mother rock of sediments of Yanwo Lake Core are from the volcanic deduced on the Fildes Peninsula. The charateristics of island-arc is retained. The REE distribution patterns are similar to those of the sidiments on the Great Wall Bay,this shows that they have the same material source. The interrelated matrix of elements in sediments of Yanwo Lake Core is show that be tween rare earth elements are extremely clear relations; between REE and Cr、Fe、Co、Hf、 Sc、Mo、As、Sb are also extremely clear relations, and Ca、 Na、Rb、Ta、 Zr、V、 Zn are show rarious degrees of negative relative.