敦煌绿洲地下水微量元素分布特征及其成因

何建华, 秦文华, 郭嘉兵, 陈沛源, 马金珠

The characteristics of groundwater trace elements and its controlling factors in Dunhuang Oasis

Jianhua He, Wenhua Qin, Jiabing Guo, Peiyuan Chen, Jinzhu Ma

图4 3个群组微量元素平均值变化趋势图

Fig.4 Trend of the average values of trace elements in three groups