某稀土矿矿物组合特征及生成顺序讨论

Discussion on mineral composition characteristics and generation sequence in a rare earth ore

该稀土矿稀土矿物为氟碳铈矿。根据矿物组合特征分析,矿物生成顺序依次为:金属矿物、氟碳铈矿、石英、长石、碳酸盐和萤石。氟碳铈矿与周围的矿物相比较粗大,呈斑晶形态,明显富集轻稀土, La、 Ce、 Pr、 Nd互为类质同象替代关系。氟碳铈矿是稀土矿物中分布最广的矿物之一,氟碳铈矿的出现,对该稀土矿找矿预测及勘查方向具有一定的指示作用。

Rare earth mineral in a rare earth ore is bastnaesite. According to the characteristics of the mineral assemblage,sequence of mineral formation is metal mineral,bastnaesite,quartz,feldspar,carbonate and fluorite. The bastnaesite is in phenocryst form and larger than other mineral grain,which is rich in LREE. The La,Ce,Pr and Nd is isomorphic with each other. Because bastnaesite is one of the most widely distributed rare earth minerals,its occurring has a certain indicating significance for the prospecting prediction and exploration of the rare earth deposit.