湘南彭公庙地区西坌大型萤石矿床成矿特征及其意义  

The Ore-forming Characteristics and Significance of the Large Fluorite Deposit in the Xiben Area of Penggongmiao,Southern Hunan

作　　者：杨齐智 吴清生 严彦 Yang Qizhi;Wu Qingsheng;Yan Yan(Mineral Resources Investigation Institute of Hunan Province,Chenzhou Hunan 432000)

机构地区：[1]湖南省矿产资源调查所,湖南郴州432000

出　　处：《国土资源导刊》2024年第4期56-65,共10页Land & Resources Herald

基　　金：中国地质调查局地质调查项目(编号:1212011085372)

摘　　要：湖南西坌萤石矿位于加里东期彭公庙复式岩体西南缘,为湘南地区新发现的大型中低温热液充填型萤石矿床,矿床受北东向区域性深大断裂、泥盆系地层和加里东期岩体共同控制。通过野外地质调查和室内实验室研究,对微量元素和稀土元素进行了地球化学特征分析,探讨了西坌萤石矿床的形成机制和矿床物质来源,总结了彭公庙地区萤石矿床的地质特征。研究表明,萤石和黑云母花岗岩具有类似的微量元素和稀土元素分布模式,推断萤石的矿床物质来源与黑云母花岗岩相同。西坌萤石矿具有中等Eu负异常和Ce弱正异常,推测该矿床是在还原环境下受断裂控制的中低温热液充填型萤石矿床,作为首次在彭公庙复式岩体周边发现大型的萤石矿床,对成矿理论的发展和丰富有着深远影响。The Xiben fluorite deposit in Hunan is situated at the southwestern margin of the Penggongmiao composite rock mass during the early Caledonian period.It represents a large medium to low-temperature hydrothermal filling fluorite deposit that was recently identified in southern Hunan.This mineral deposit is influenced by regional NNE-trending major faults,Devonian geological formations,and Caledonian intrusive bodies in the area.This study involved field geological surveys and laboratory experiments to analyze the geochemical characteristics of trace elements and rare earth elements.It discussed the formation mechanism and mineral sources of the Xiben fluorite deposit,and summarized the geological features of fluorite deposits in the Penggongmiao area.Research indicates that fluorite and biotite granite share comparable trace element and rare earth element distribution patterns,implying a common mineral source.The Xiben fluorite deposit displays a moderate negative Eu anomaly and a weak positive Ce anomaly,indicating its formation as a medium to low-temperature hydrothermal filling fluorite deposit influenced by fractures in a reducing environment.The identification of this significant fluorite deposit near the complex rock formations in Penggongmiao is a groundbreaking discovery with profound implications for advancing mineralization theories.

关 键 词：微量元素 稀土元素 萤石矿床 西坌 湘南彭公庙地区 

分 类 号：P618.6[天文地球—矿床学]