湘东钨矿流体包裹体温度填图及找矿勘查指示

Temperature Mapping of Fluid Inclusions and Prospecting Instruction of Xiangdong Tungsten Deposit

湘东钨矿是湖南邓阜仙地区典型的石英脉形钨矿床。在详尽系统的野外工作基础上,通过镜下岩相学、显微测温和激光拉曼光谱分析,查明了湘东钨矿含矿石英的流体包裹体性质。研究表明,该区流体包裹体主要为Na-Ca水溶液包裹体、CH_(4)包裹体、NaCl-CO_(2)-H_(2)O三相包裹体和子晶包裹体,成矿流体为中-高温、中-低盐度NaCl-CaCl_(2)-H_(2)O-CH_(4)-CO_(2)流体体系。通过流体包裹体均一温度填图可知,10中段应处于大脉带或地下室叠加部位,老山坳断层可能为后期成矿热液通道,其深部具有一定的找矿潜力。

The Xiangdong tungsten deposit is a typical quartz-vein type tungsten deposit in the Dengfuxian area,Hunan Province.Based on the field work,petrography,microthermometry and Laser Raman spectrometry,the characteristics of the fluid inclusions in quartz in Xiangdong have been studied.The results show that there are four types of fluid inclusions in this area:Na-Ca aqueous inclusions,CH_(4) inclusions,NaCl-CO_(2)-H_(2)O three-phase inclusions and daughter mineral bearing inclusions.The ore-forming fluids are NaCl-CaCl_(2)-H_(2)O-CH_(4)-CO_(2) fluid system with medium-high temperature and medium-low salinity.The homogenization temperature of fluid inclusions shows that the section 10 might belong to large vein zone or overprinted basement zone,and the Laoshan'ao fault might be the path for the late stage ore-forming fluid and has certain prospecting potential.