Nadingco Formation volcano rocks zircon U-Pb age and geochemical characteristics in Gêrzê county area of northern Tibet area
CHU Huili
玄武岩构造环境判别 w (Th)/ w (Hf)- w (Ta)/ w (Hf)图解 Ⅰ.板块发散边缘N-MORB区; Ⅱ.板块汇聚边缘(Ⅱ1.大洋岛弧玄武岩区; Ⅱ2.陆缘岛弧及陆缘火山弧玄武岩区); Ⅲ.大洋板内洋岛、海山玄武岩区及T-MORB、E-MORB区; Ⅳ.大陆板内玄武岩区(Ⅳ1.陆内裂谷及陆缘裂谷拉斑玄武岩区; Ⅳ2.陆内裂谷碱性玄武岩区; Ⅳ3.大陆拉张带(或初始裂谷)玄武岩区); Ⅴ.地幔热柱玄武岩区