摘要
萤石是四川牦牛坪稀土矿最重要的脉石矿物之一。根据稀土含量、有关参数及配分模式 ,矿区萤石可分为LREE富集型、LREE平坦型和LREE亏损型 3种 ,不同类型萤石之间以及每种类型萤石的稀土地球化学特征具有连续变化规律。分析结果表明 :矿区 3种类型的萤石为同源不同阶段形成的产物 ;矿床成矿流体主要来源于本区正长岩—碳酸岩岩浆演化分异的相对富集LREE的流体 ;矿床成矿过程中较少再有相对富集LREE的流体参与 ;成矿环境由相对氧化向相对还原变化。
Fluorite is an important vein mineral in Maoniuping rare-earth deposit in Sichuan Province. According to REE content, REE parameters and partition patterns, fluorites in the orefield can be classified into LRE-rich, LRE-plane and LRE-loss model. The REE geochemical features of fluorites in orefield show that three model fluorites are products of different ore-forming stage, but of the same source. Ore-forming fluids were differentiated from syenites (the age of lithogenesis is Himalaya). During ore-forming process, ore-forming fluids were little mixed with rich-LRE fluids and ore-forming environment changed from relatively oxidation to reduction.
出处
《地质与勘探》
CAS
CSCD
北大核心
2001年第5期24-28,共5页
Geology and Exploration
基金
国家攀登计划预选项目资助 (批准号 :95 -预 -39)。
