古里雅冰帽8米浅冰芯的化学成分组成特征及其来源  

A Geochemical Study on an 8 m Depth Ice Core of Guliya Ice Cap

作　　者：李月芳[1] 姚檀栋[1] 盛文坤 皇翠兰 谢超 

机构地区：[1]中国科学院兰州冰川冻土研究所冰芯与寒区环境实验室

出　　处：《冰川冻土》1997年第2期173-179,共7页Journal of Glaciology and Geocryology

摘　　要：对古里雅冰帽８ｍ浅冰芯的８０个雪冰样品化学分析结果表明，化学成分主要来自陆源物质，陆源物质使冰芯样品呈弱碱性。The major cations (Ca 2+ , Na +, Mg 2+ , K +) and anions (Cl -, SO 2- 4,NO - 3) of an 8 m depth ice core were analysed The results indicate that the concentration of Ca 2+ is the highest in cations, the pH value is in the range of 6 62～9 36, and that of 85% samples are more than 7, indicating that the snow/ice water of Guliya Ice Cap is weak alkaline Statistical treatment of the data reveals that obvious positive correlations exist between Cl - and Na +, implying that they mainly originate from the matter including NaCl salt Both the value of pH and conductivity have obvious positive correlations with Ca 2+ , suggesting that they attribute to alkaline matter including Ca 2+ rather than acid matter Assuming that the total Na + comes from sea salt, the excess Ca 2+ (non-sea salt) is calculated at least to be 96 6%～99 75% in total Ca 2+ , suggesting that Ca 2+ mainly comes from terrestrial matter The chemical elements of the Guliya Ice Cap mainly come from the arid areas in the northern part of the Tibetan Plateau, revealed by the concentations, the value of pH, conductivity as well as by comparison with the southern part of the plateau and the polar glaciers

关 键 词：冰帽 古里雅冰帽 冰芯 化学成分 组成特征 

分 类 号：P343.6[天文地球—水文科学]