作者单位:QIU Yan-qing,LI Ming-li,WANG Zhu,HU Ya-yan(Central Laboratory of Bureau of Geology and Exploration Tibet,Lhasa Testing and Quality Supervision Center for Geological and Mineral products,The Ministry of Land and Resources,Lhasa 850033,China)邱衍卿,李明礼,王祝,胡亚燕(西藏自治区地质矿产勘查开发局中心实验室,国土资源部拉萨矿产资源监督检测中心,西藏 拉萨850033)