赣南八仙脑钨矿区氟磷锰矿的发现及地质意义初析  

Discovery and Geological Significance of Triplite in Baxiannao Tungsten Deposit,Southern Jiangxi Province,China

作　　者：李光来 华仁民[1] 李响[1] 韦星林 黄小娥 胡东泉[1] 张文兰[1] 王旭东[1] 

机构地区：[1]内生金属矿床成矿机制研究国家重点实验室南京大学地球科学与工程学院,江苏南京210093 [2]江西有色地质勘查局,江西南昌330001

出　　处：《矿物学报》2010年第3期273-277,共5页Acta Mineralogica Sinica

基　　金：国家重点基础研究发展计划(2007CB411404);国家自然科学基金(批准号:41073035)

摘　　要：对赣南八仙脑钨矿区发现的氟磷铁锰矿进行了激光拉曼光谱、X射线粉晶衍射和电子探针成分研究,显示该种矿物为接近锰端元的氟磷锰矿。氟磷锰矿中含有丰富的气液两相包裹体,大者超过150μm,且多为气/液比小于1的富液相包裹体。拉曼光谱显示,气相组分中不仅含有H2O,还含有CH4、CO2,而液相组分则以H2O为主。氟磷锰矿在含钨石英脉中出现,且空间上与石英、萤石等脉石矿物密切共生,说明八仙脑钨矿床成矿流体具有富氟富磷的特征。此外,根据矿石中氟磷锰矿的存在,也可以初步判断相关的花岗岩体可能是富氟的花岗岩。A pink mineral was newly found in Baxiannao tungsten deposit,southern Jiangxi province,China.Analytical results of Laser Raman spectra,XRD patterns and electron-microprobe all proved that the mineral was triplite,the manganese end-member of triplite-zwieselite series.The calculated chemical formula is （Mn,Fe,Mg,Ca） 2PO4 （F,OH） .It occurs in the wolframite-bearing quartz vein and is associated with quartz and fluorite,which indicates that the ore-forming fluid is rich in phosphor and fluorine.The triplite contains a lot of fluid inclusions of two phases.Almost all of the fluid inclusions are aqueous-rich and many of them are larger than 150 μm.Raman spectra showed that the liquid phase was water while the gas phase contained not only H2O,but also CH4 and CO2.The discovery of triplite together with quartz and fluorite in the tungsten deposit suggests that the related granite is most likely attributed to the fluorine-rich category.

关 键 词：氟磷锰矿 X射线粉晶衍射 激光拉曼光谱 电子探针成分 八仙脑钨矿 

分 类 号：P571[天文地球—矿物学] P578.92[天文地球—地质学]