摘要
萤石是四川牦牛坪稀土矿床最重要的脉石矿物之一,本身已具有工业价值。根据稀土元素含量、有关参数及分布模式,将矿区萤石分为LREE富集型、LREE平坦型和LREE亏损型三种。不同REE类型中的萤石稀土元素地球化学特征具有连续变化的规律。萤石与围岩REE、同位素分析对比结果表明,LREE富集型、LREE平坦型和LREE亏损型萤石为同源不同阶段形成的产物;萤石成矿流体具有地幔特征,与矿区正长岩-碳酸岩密切相关。
Fluorite is the most important vein mineral of the Maoniuping rare earth deposit in Sichuan Province. According to REE contents, parameters and distribution patterns, the fluorites in the ore field are classified into LREE rich, LREE plane and LREE loss types. The REE geochemical features of the three types have continuous change regularities. The comparison of REE and isotopic results between the fluorites and the wall rocks shows that the three types of fluorites are the products of the same source during different ore forming stages, and the ore forming fluids have mantle features and closely relation with syenite carbonatite.
出处
《地球化学》
CAS
CSCD
北大核心
2002年第2期180-190,共11页
Geochimica
基金
国家"973"项目(G1999046203)
国家攀登计划预选项目(95-预-39)
