摘要
笔者从区域地质条件、矿床地质特征、冕西岩体性质、稀土模式、主要稀土矿物特征以及矿石的工艺性质进行了考查,并作了区域性对比。初步认为,在冕西地区以碱长花岗体为主体,形成了面积近800km^2的稀土成矿区。霓石碱性花岗岩-构造破碎带-碱性(伟晶)岩脉是区内稀土成矿的基本要素,也是最直接的找矿标志,围绕冕西岩体出露的卫星式霓石碱性花岗岩有着不同于A型碱长花岗岩的稀土模式,是稀土成矿矿源体。不同产地的稀土矿物特征、矿石矿物组合和矿石类型均有很好的可比性,属易采易选优品级稀土矿石。在该区有必要进一步开展矿产普查工作。
This paper studies the regional geologic conditions, mineral deposit geologic characterstics, REE distribution model, alkali granite properties and bastnaesite features of the rare-earth deposits in western Mian Ning county, Sichuan. Our research shows that the Mian Ning County is an important REE metallogenic region which has an area about 800km2 covered by Mianxi alkalifeldspar granite. The aegirine alkali granite-structural fractured zone-alkali pegmatite vein system constitute of three main ore-forming elements in the ore-forming region and serve as a direct guide for ore exploration. The rare-earth distribution model of the aegirine alkali granite occurring round the Mianxi alkalifeldspar granite differs from A-type alkalifeldspar granite. It is a source body from which the rare-earth deposits form. The bastnaesite features look similar in different ore districts. The rare-earth ores in the area belong to a high-quality ore type for mineral dressing.
出处
《地质科技情报》
CAS
CSCD
北大核心
1992年第3期51-58,共8页
Geological Science and Technology Information
基金
国家教育委员会博士点经费资助
关键词
稀土族
成矿带
成矿条件
地质
rare-earth metallogenic region, ore-forming condition, source body of ore, ae-girine alkali granite, bastnaesite
