关键词: 高海拔地区, 珠峰地区, 珠穆朗玛峰地区, 中微量元素, 大气气溶胶, 富集系数, 南北极, 大气降水, 南极冰雪, 化学地理

Abstract: On the northern slopes of Mt. Qomolangma samples of ice and snow were collected at altitudes of 7,050-7,846 m. The trace elements in ice and snow samples were determined by neutron activation analysis in the Institute of High Energy Physics, Academia Sinica. The data obtained indicate that variation in the vertical distribution of trace elements in the ice-snow profiles does not differentiate greatly. The contents of Hg, Cu and Sb in glacial ice and snow collected in the nit. Qomolangma region are in agreement with those of the metals in snows of the Antarctics and Greenland. The contents of As and Cr in our samples are greater than those in ice and snow of the Antarctics. The zine content is high up to 0.42 ppm as comparable with that in precipitation in the USA. The order of enrichment factor valtues of trace elements (Cu, As, Cr, Sb and Hg) is similar to that of the Antarctics with the exception of zinc. There are probably natural sources for these trace elements, such as crustal weathering, volcanic eruption etc. yet the high enrichment factor may be due to some anthropogenic sources.