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5 界牌岭蚀变花岗斑岩中氧化物电子探针化学成分代表性结果(wt.%)

Table 5 Representative electron microprobe chemical compositions of oxides from the altered granite porphyry in Jiepailing (wt.%)

铌锰矿 铌铁矿 锡石 Nb2O5 57.55 55.35 58.98 68.30 - 0.17 Ta2O5 6.11 14.77 13.90 6.98 - - SnO2 96.55 99.09 WO3 9.73 5.61 5.47 1.99 0.09 0.15 MnO 18.59 16.95 1.98 3.51 0.01 - FeOT 1.80 2.91 17.40 16.96 0.20 0.09 TiO2 5.27 2.68 3.19 0.71 3.06 0.01 Total 98.44 98.26 100.91 99.05 99.91 99.50 以n(O)=6计算 以n(O)=4计算 Nb 1.531 1.535 1.575 1.821 0.003 Ta 0.098 0.246 0.223 0.112 Sn 1.933 1.992 W 0.148 0.089 0.084 0.030 0.001 0.002 Mn 0.927 0.881 0.871 0.175 Fe 0.089 0.149 0.098 0.837 0.008 0.004 Ti 0.233 0.124 0.142 0.031 0.061