邵武市新坪萤石矿床地质特征及成矿环境分析

Geological characteristics and metallogenic environment analysis of Xinping fluorite deposit in Shaowu City

新坪萤石矿位于邵武市张厝乡新坪村,属南山下式中低温热液充填型萤石矿,矿体赋存于北东向断裂破碎带中。萤石矿体地表出露长度约150m;矿体厚度地表出露平均2m左右;矿体厚度在三维立体上均有中部大、两端小,并具有尖灭再现特征。萤石矿石类型为石英-萤石类型,萤石矿品位最低21.19%,最高93.84%。对矿体及围岩采用化学全分析、稀土元素分析对萤石矿的物质来源及成因进行探讨,认为萤石矿成矿热液来自钙碱性花岗岩,矿床成因类型为热液成因。

Xinping fluorite mine is located in Zhangcuo township in Shaowu city.belongs to Nanshanxia type medium and low temperature hydrothermal filling fluorite mine.Ore bodies occur in the NE fracture zone.The surface outcrop length of fluorite ore body is about 150m;The average surface thickness of orebody is about 2m in 3D space.The orebody thickness is large in the middle and small at both ends,and has the characteristics of pinch-out and reappear.The type of fluorite ore is quartz-fluorite.The lowest grade of fluorite ore is 21.19%and the highest is 93.84%.The origin and genesis of fluorite ore were discussed by means of chemical analysis and rare earth element analysis of orebody and surrounding rock.It is considered that the mineralization hydrothermal fluid of fluorite ore comes from calc-alkaline granite and the genetic type of deposit is hydrothermal genesis.