牦牛坪矿-(Ce):一种新发现的稀土元素矿物

Maoniupingite-Ce: a new rare-earth mineral from the Maoniuping rare-earth deposit in Mianning, Sichuan

牦牛坪矿- (Ce)属硅钛铈矿亚族的新成员,发现于四川牦牛坪稀土矿床的碳酸岩、伟晶碳酸岩和碱性岩等矿脉中。与已知的同亚族矿物相比,新矿物要么是chevkinite - (Ce)B位上的Fe3 + 类似物,要么同时是polyakovite- (Ce)B位和C位上的Fe3 + 类似物。牦牛坪矿- (Ce)直接从一类富F、水和REE的岩浆 热液过渡阶段的成矿流体中结晶所成。新矿物得名于产地和稀土元素中Ce居优。牦牛坪矿- (Ce)及其命名,已获国际矿物协会新矿物及矿物命名委员会投票批准。

Maoniupingite-Ce approved by IMA CNMMN as a new rare-earth mineral and a new member of the chevkinite subgroup is identified in the veins of carbonatites, pegmatitic carbonatites and alkaline rocks from the Maoniuping rare-earth deposit in Mianning, Sichuan. Compared with the known equivalents, the new mineral is interpreted to be either the Fe3+ analogue of chevkinite-(Ce) at the B site or the Fe3+ analogue of polyakovite-(Ce) at the B and C sites, and directly crystallized from a type of F-, water- and REE-rich mineralizing fluids during the transitional stages of magmatic-hydrothermal processes.