喜马拉雅康巴淡色花岗岩的高分异成因及 岩浆⁃热液演化特征

刘志超, 刘小驰, 俞良军, 王建刚

Highly fractionated origin and magmtic⁃hydrothermal evolution of the Kampa leucogranites in the Tethyan Himalaya

Zhichao Liu, Xiaochi Liu, Liangjun Yu, Jian'gang Wang

表2 康巴淡色花岗岩锆石主量元素组成

Table 2 Major element compositions of the zircons from the Kamba leucogranites

第一组（增生边） 1 2 3 4 5 6 7 8 9 10 11 SiO2 33.57 32.81 32.75 32.87 32.57 33.45 32.62 32.67 32.61 32.55 33.28 ZrO2 65.76 65.67 65.51 65.70 64.98 65.06 64.35 65.65 65.41 65.79 65.15 HfO2 0.57 0.94 1.15 1.23 1.25 1.25 1.29 1.29 1.32 1.38 1.42 Y2O3 - 0.14 - 0.19 0.08 - 0.51 0.09 - 0.07 - PbO - - 0.08 0.20 - - - 0.14 - - 0.16 总量 99.90 99.56 99.49 100.19 98.88 99.76 98.77 99.84 99.34 99.79 100.01 Zr/Hf 100.7 61.0 49.7 46.6 45.4 45.4 43.5 44.4 43.2 41.6 40.0