【摘要】 对可可西里马兰冰川冰芯利用ElementICP MS测定了其中Cd和Pb的浓度 .样品中Cd的浓度 ,除了四个样品未检出外 ,其余样品的浓度在 0 399— 1 4 735ng·l- 1之间 ,平均值为 4 6ng·l- 1.Pb的浓度在 8 9— 5 1ng·l- 1之间 ,平均值为 2 0ng·l- 1.Cd和Pb在深度上没有明显的变化趋势 ,Cd和Pb的浓度基本上代表了该地区雪冰中的背景值 .更多还原

【Abstract】 The concentrations of Cd and Pb of a 2.2m depth ice core from the Malan glacier,drilled in 1999 in Qinghai,were determined using element ICP-MS.The concentrations of the two heavey elements decrease in the radius of the ice core indicate the non-contamination part of the ice core were obtained.The concentrations of Cd are in the range of 0.339-14.735ng·l -1,except four samples that the concentrations are too low to determined,and the mean value is 4.6ng·l -1,lower than in the Guliya ice core,in the northwest part of the Tibet plateau.The Pb concentrations are in the range of 8.9-51ng·l -1,and the mean value is 20ng·l -1,lower than in the Dasuopu icecore,in the southern part of Tibet plateau.No obvious change trends of concentrations are founded for the two metals.The concentrations of Cd and Pb may present the background value for the two metals in Qinghai Tibet plateau.更多还原