粤北石人嶂石英脉型钨矿床流体包裹体研究—以14~#脉为例  

Study on fluid inclusion of Shirenzhang quartz-vein type tungsten deposit in northern Guangdong province—Taking 14~# vein as an example

作　　者：田野[1] 周旻玥[1] 韦龙明[1] 裴秋明 王莉[1] 赖传勇 

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004 [2]广西壮族自治区三○七核地质大队,广西贵港537100

出　　处：《有色金属（矿山部分）》2014年第6期24-29,共6页NONFERROUS METALS(Mining Section）

基　　金：国家深部探测计划专项研究专题(SinoProbe-03-01-03C);全国危机矿山接替资源勘查专项典型矿床研究课题(20109908-1);广西地质工程中心重点实验室基金项目(11-031-20-1)

摘　　要：通过对石人嶂钨矿主矿脉之一的14#脉中石英包裹体进行研究,发现其类型主要为Ⅰ型(H2O-NaCl体系)及Ⅱ型(液态CO2三相CO2-H2O-NaCl体系)两类,且以Ⅰ型居多。在对Ⅰ型包裹体进行显微测温后得出,成矿流体均一温度(未校正)为183.9℃~413.2℃,冰点温度为-5.9℃^-0.2℃,计算后得出其盐度为0.35wt%~9.08wt%NaCl eqv,密度为0.52~0.95g/cm3,属于低盐度、中低密度流体,与华南热液石英脉钨矿成矿流体大致相当。另外,包裹体均一温度及盐度分布有多峰特性,推断成矿作用具有多期次的特征。孤立包裹体均一温度具有与高程负相关变化的趋势,结合邻区的He-Ar同位素研究,推断流体来源于深部,后有大气水加入。该矿脉石英流体包裹体的研究对进一步探讨矿区矿床成因具有一定的指示意义。Based on the studies of fluid inclusions in 14#quartz vein,one of the main tungsten mine veins of Shirenzhang,it is found that its main types are typeⅠ（H2O-NaCl system）and type Ⅱ（liquid CO2three-phase CO2-H2O-NaCl system）,mostly are typeⅠ;Microthermometry data of typeⅠ inclusions shows that ore-forming fluid homogenization temperature（non-corrected）is 183.9℃ ~413.2℃,ice point temperature is-5.9℃ ^-0.2℃,salinities are 0.35wt% ~ 9.08wt% NaCl eqv,and density is 0.52~0.95g/cm3,which belongs to low salinity,medium-low density level,and it is roughly the same as hydrothermal quartz-vein tungsten ore-forming fluid in south China.In addition,the distribution of homogenization temperature and salinity has multiple peaks,which infer that mineralization has the characteristics of multi-stages.Homogenization temperature of isolated inclusions has a negative correlation with elevation,combining with the study of He-Ar isotopic in the adjacent areas,which infers that the fluid derives from the depth before atmospheric water added in.Fluid inclusion studies of the quartz vein have certain indicative significance for further discussion of ore genesis.

关 键 词：石英脉型钨矿 流体包裹体 显微测温 石人嶂 粤北 

分 类 号：TD11[矿业工程—矿山地质测量]