中文摘要：

赣北石门寺钨矿是近几年来发现的超大型钨多金属矿床,该矿床很有可能打破传统江西“南钨北铜”的资源格局。为揭示成矿流体特征及探讨流体演化过程,研究选取石门寺钨矿床石英大脉型矿体含矿石英中的流体包裹体进行岩相学、显微测温学以及激光拉曼光谱分析等测试。岩相学观察发现,石门寺钨矿床以富液相包裹体为主,另发育有富气相、含CO_2三相、纯液相及纯气相包裹体。显微测温结果显示,均一温度分布在147.1℃-316.2℃之间,主要集中在201.5℃-259.2℃,均值为211.1℃;盐度w（NaCl_（eq））分布在0.88%-7.31%之间,集中在1.05%-3.06%,均值为2.45%;密度分布在0.79g/cm3-0.94g/cm-3之间,集中在0.82g/cm-3-0.92g/cm-3,均值为0.87g/cm-3。拉曼分析除检测到CH_4外,还不同程度的检测到CO_2,N_2的存在。表明成矿流体性质为中温、低盐度、低密度的NaCl-H_2O-CH_4±（CO_2,N_2）体系。成矿流体在演化过程中经历了岩浆热液与大气降水的混合作用以及流体的沸腾作用,二者相结合打破化学平衡,是引起钨的化合物分解并沉淀的主要因素。并且盐度-热焓图解显示成矿流体演化过程是以混合作用为主导,局部发生沸腾作用。

英文摘要：

The Shimensi tungsten potymetallic deposit,a recently discovered superlarge deposit in northern Jiangxi,Province. It may break the traditional pattern of ＂tungsten in the south and copper in the north＂ of Jiangxi province. To reveal the characters and evolutions of the ore-form- ing fluids, the fluid inclusions in quartz vein ore bodies were investigated by using rnicrothermom- etry and the Raman microprobe. On the basis of microscopic investigation, the fluid inclusions are mainly composed of liquid-rich aqueous inclusion and a few liquid-pure, gas-pure, gas-rich and three phase containing COz inclusions. Microthermometry results show that the homogenization temperature is between 147. 1 ℃ and 316.2℃, concentrating on 201.5 ℃ to 259.2 ℃, average value of 211.1 ℃. The salinity is between the range of from 0. 88% to 7. 315 NaCleq ,an concen- trating on 1.05-3.06% NaCteq,an average value of 2. 45% NaCleq. The density is within the limits of from 0. 79 g/cm3 to 0. 94 g/cm3 ,concentrating on 0.82 g/cm3 -0.92 g/cm3 ,an average value of 0.87 g/cm3. The raman microprobe analysis results that CH4, CO2 and Nz are detected. The results plot indicate that the ore-forming fluids have the main composition of the medium temperature,low salinity and low density NaC1-H2O-CH4± （CO2 ,N2）system. During the evolu- tion of the ore-forming fluid,the mixing of magmatic hydrothermal fluid and meteoric water, and the boiling effect of fluid. The combination of the mixing and boiling are the main factor that cau- ses the Precipitation of tungsten compound and break the chemical equilibrium, enthalpy-salinity plot indicate that mixing appears as the most dominating process,local boiling occurred during the evolution of the hydrothermal system.