柴北缘夏日达乌铌钽矿区花岗岩地球化学特征及地质意义

魏生云,王建国,郭学忠,邢佳

Geochemical Characteristics and Geological Significance of Granite in Xiaridawu Niobium-Tantalum Mining Area，Northern Margin of Qaidam Basin

Shengyun WEI,Jianguo WANG,Xuezhong GUO,Jia XING

图12 花岗岩Th-Rb和Y-Rb图解（底图据Sylvester，1998）

Fig.12 Th-Rb and Y-Rb diagrams of granite（base map after Sylvester，1998）