北祁连榆树沟山金矿区花岗闪长斑岩脉锆石U-Pb年龄、地球化学特征及其地质意义

杨彦,黄增保,郭小刚,许延龙,颜华

Zircon U-Pb Age and Geochemical Characteristics of Granodiorite Porphyry Veins in Yushugoushan Gold Deposit，Northern Qilian Mountain，and Its Geological Significance

Yan YANG,Zengbao HUANG,Xiaogang GUO,Yanlong XU,Hua YAN

图6 榆树沟山金矿花岗闪长斑岩稀土元素球粒陨石标准化配分模式（a）（底图据Boynton et al.，1984）和微量元素原始地幔标准化蛛网图（b）（底图据Sun et al.，1989）

Fig.6 Chondrite normalized REE patterns（a）（base map after Boynton et al.，1984）and trace elements primitive mantle-normalized spider diagrams（b）（base map after Sun et al.，1989）of granodiorite porphyry in Yushugoushan gold deposit