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6 界牌岭蚀变花岗斑岩中稀土矿物电子探针化学成分代表性结果(wt.%)

Table 6 Representative electron microprobe chemical compositions of rare earth minerals from the altered granite porphyry in Jiepailing (wt.%)

氟铈矿 氟碳铈矿 Ce2O3 41.42 43.35 42.06 36.31 36.22 32.69 32.85 29.53 La2O3 20.05 19.11 20.72 17.68 17.02 17.22 17.30 17.77 Nd2O3 15.67 15.44 14.30 14.94 13.97 13.63 14.16 18.08 ThO2 1.40 1.25 2.71 1.75 3.21 5.57 6.22 0.96 Gd2O3 2.56 3.07 2.70 2.39 2.04 2.62 1.47 2.41 CaO 2.69 0.47 0.57 0.98 1.83 1.77 2.04 2.21 Y2O3 0.56 0.48 0.08 0.38 0.13 0.62 0.54 2.98 Yb2O3 0.11 0.09 0.09 0.01 - - 0.19 0.04 F 28.01 26.52 27.24 9.26 8.20 8.44 8.76 7.61 H2O* 0.30 0.13 0.03 0.71 CO2* 20.22 20.49 20.19 20.44 21.10 O=F -11.76 -11.14 -11.44 -3.89 -3.44 -3.54 -3.68 -3.20 Total 100.71 98.65 99.02 100.04 99.98 99.21 100.28 100.19 以n(F)=3计算 以一个阳离子和一个CO32-计算 Ce 0.513 0.567 0.536 0.501 0.502 0.452 0.461 0.443 La 0.250 0.252 0.266 0.246 0.237 0.239 0.244 0.268 Nd 0.190 0.197 0.178 0.201 0.189 0.184 0.194 0.265 Th 0.011 0.010 0.021 0.015 0.028 0.048 0.054 0.009 Gd 0.029 0.036 0.031 0.030 0.026 0.033 0.019 0.033 Ca 0.098 0.018 0.021 0.040 0.074 0.072 0.084 0.097 Y 0.010 0.009 0.001 0.008 0.003 0.012 0.011 0.065 Yb 0.001 0.001 0.001 0.000 0.002 0.000 F 3.000 3.000 3.000 1.061 0.927 0.969 0.993 0.836 OH* 0.073 0.031 0.007 0.164