对贵州遵义天鹅山-黄家湾镍-钼富集层中镍-钼矿石进行了电子探针研究,在镍-钼矿石中发现了稀土独立矿物——独居石,呈不规则的细粒、蠕虫状分布于矿石中,并与镍、钼的独立矿物共生;独居石La和Ce的含量高(La2O3含量变化范围为25.70%~30.52%,Ce203含量变化范围为22.96%-27.68%),贫Sm、Th(Sm2O3含量的变化范围为0.49%-0.80%,ThO2含量的变化范围为0%-0.19%),具有热液成因独居石的化学成分特征。镍-钼矿石中稀土矿物独居石的发现为镍-钼矿层的热液成因提供了直接的矿物学证据。
A REE-bearing mineral, i. e., monazite, was discovered in the Ni-Mo ore from the Tian' eshanHuangjiawan Ni-Mo sulfide layer of Zunyi, Guizhou Province, on the basis of electron microprobe analysis. The monazite is distributed as fine scattered particles and vermicular aggregates in the Ni-Mo ore, coexistent with Ni- and Mo-bearing minerals. High La and Ce contents (La2O3 : 25.70% --30.52%, Ce2O3 : 22.96% --27.68% ) and low Sm and Th contents(Sm203 : 0.49 % -0.80 %, ThO2:0 % -0.19 % )of the monazite show the characteristics of hydrothermal generated monazite.