湖南界牌岭花岗斑岩的蚀变过程与稀有稀土金属成矿

林晓青, 饶灿, 覃莉茜, 吴润秋, 王琪

Alteration processes and rare (earth) metal mineralization of Jiepailing porphyry deposit, Hunan Province

Xiaoqing Lin, Can Rao, Lixi Qin, Runqiu Wu, Qi Wang

表4 界牌岭蚀变花岗斑岩、蚀变围岩中萤石的电子探针化学成分代表性结果(wt.%)

Table 4 Representative electron microprobe chemical compositions of fluorite from the altered granite porphyry and the altered wall rock in Jiepailing (wt.%)

蚀变花岗斑岩 蚀变围岩 斑晶 基质 脉状 粒状 Ca 52.08 52.83 48.68 49.66 51.49 52.31 50.78 52.76 51.37 F 47.69 46.28 47.99 46.70 45.88 46.61 48.29 47.13 47.95 Ce 0.06 - 1.07 0.79 0.09 - 0.13 0.07 - Y 0.01 0.01 1.19 0.93 1.82 0.05 0.04 - 0.07 Nd - - 0.66 0.50 0.15 0.04 - - 0.10 La - 0.07 0.39 0.38 - - 0.14 Yb - - 0.15 0.04 0.02 - - - - Gd - - 0.15 0.12 - - 0.03 - 0.02 Th 0.04 0.02 0.03 0.00 0.01 - 0.07 - 0.03 Total 99.87 99.20 100.32 99.10 99.45 99.02 99.48 100.97 100.53 以氟原子数n(F)=2计算 Ca 1.037 1.084 0.964 1.010 1.066 1.066 0.999 1.063 1.018 F 2.000 2.000 2.000 2.000 2.000 2.000 2.000 2.000 2.000 Ce 0.006 0.005 0.001 0.001 Y 0.011 0.009 0.017 0.001 Nd 0.004 0.003 0.001 0.001 La 0.002 0.002 0.001 Yb 0.001 Gd 0.001 0.001 Th 0.000 0.000 0.000 0.000 0.000 0.000 0.000