粤北梅子窝钨矿床中黑钨矿的矿物学特征及意义  

Mineralogical Characteristics and Significance of Wolframite in Meiziwo Tungsten Deposit, Guangdong Province

作　　者：袁琼[1] 马志举 韦龙明[1] 吴限[1] 刘驹先 YUAN Qiong;MA Zhiju;WEI Longming;WU Xian;LIU Juxian(College of Earth Science,Guilin University of Technology,Guilin 541006,Guangxi,China;Luanchuan Secondary Vocational School,Luoyang 471500,Henan,China)

机构地区：[1]桂林理工大学地球科学学院,广西桂林541006 [2]栾川县中等职业学校,河南洛阳471500

出　　处：《中国钨业》2018年第1期32-40,共9页China Tungsten Industry

基　　金：全国危机矿山接替资源勘查项目(200644089);国家深部探测计划研究专项研究课题(Sino Probe-03-01)

摘　　要：研究利用X射线粉晶衍射技术和电子探针技术对粤北梅子窝黑钨矿床中的黑钨矿进行矿物学研究,得黑钨矿晶胞参数为a0=0.476 nm,b0=0.572 nm,c0=0.497 nm,β为90°17′,且大部分样品的锰铁比值都小于1,属于锰钨铁矿。矿床从下部中段到上部中段,黑钨矿的H/F比值逐步增大,黑钨矿种类由锰钨铁矿向铁钨锰矿过渡,呈现出"上锰下铁"的"逆向分带"成矿特点,矿区黑钨矿中铌、钽含量同步消长,且都随着深度的增加而增大,说明铌、钽来源于深部,为深部预测及找矿提供一定的指导意义。The X-ray powder diffraction and electron probe microanalysis were applied to investigate the Meiziwo Wolframite Mine.The wolframite unit cell parameters are a0=0.476 nm,b0=0.572 nm,c0=0.497 nm,andβis 90°17′.The ratio of manganese to iron in most samples is less than 1.From the lower middle to the upper middle part of the deposit,the H/F ratio of wolframite gradually increases.The type of wolframite changes from manganese wolframite to ferromanganese.The content of antimony and tellurium in the wolframite increases with the depth.This indicates that the niobium and tantalum ores are derived from the deep,which provides certain guiding significance for the deep prediction and prospecting.

关 键 词：梅子窝钨矿床 黑钨矿 矿物学 X射线粉晶衍射法 电子探针法 逆向分带 

分 类 号：P618.67[天文地球—矿床学] TG115.222.1[天文地球—地质学]