中文摘要：

对2005年9月采自珠穆朗玛峰北坡海拔6523m的东绒布冰川积累区一批雪坑样品中重金属Ba，Co，Cu，Zn和Pb的浓度利用电感耦合等离子体质谱仪进行了测试．重金属浓度范围分别为（pg／ml）；Ba2-227、Co2．8—15．7、Cu10—120、Zn29-4948、Pb14～142。并利用气体稳定同位素质谱仪MAT-252对样品稳定氧同位索比率（8—80）进行了测试．雪坑样品对应的时间为2004年夏到2005年秋．δ^18O和重金属元素的浓度都存在着季节变化特征。在夏季风期间δ^18O值和重金属元素的浓度都很低。而在非夏季风期间δ^18O值和重金属元素浓度升高，反映了不同的水汽束源对重金属浓度季节变化的影响及其环境意义。Co，Cu，Pb，Zn的地壳富集系数（ER）分别为：3．6、27、33、180，表明该地区Ph，Cu，Zn已经受到了人类活动的污染，其中Zn受到的污染最大。

英文摘要：

The concentrations of heavy metals Ba, Pb, Cu, Zn and Co in snow pit collected in September, 2005 from the accumulation area of the East Ronbuk Glacier （a.s.1. 6523 m）, which lies on the northern slope of Mt Qomolangma, were determined by inductively coupled plasma mass spectrometry （ICP-MS）, concentrations （pg/ml） of heavy metals vary from Ba2-227, Co2.8-15.7, Cul0-120, Zn29-4948, and Pb14-142, respectively. And δ^18O determined by MAT-252, the time period of the snow pit spanning from auturnn 2005 to summer 2004. Seasonal variations of the concentrations and δ^18O are observed, of which Pb, Cu, Zn and Co are much lower in summer monsoon season than that in non summer monsoon season, suggesting that different sources of heavy metals contributed to the site. EFc （crustal enrichment factors） is Co 3.6, Cu 27, Pb 33 and Zn 180, respectively. Higher EFc values of Pb, Cu and Zn suggest that Pb, Cu especially Zn mainly contributed by anthropogenic sources.