论文部分内容阅读
云南罗平富乐铅锌矿是川滇黔铅锌成矿域内赋矿层位最新的大型铅锌矿床,成矿流体研究薄弱,铅锌成矿作用过程的认识缺少实际地球化学依据。对该矿床及邻近矿点中闪锌矿流体包裹体的研究表明,该区矿床(点)闪锌矿中流体包裹体以气液相包裹体为主,其次为含子矿物多相包裹体,显微测温获得闪锌矿流体包裹体均一温度主要分布在120~160℃和180~210℃两个区间,盐度分布在4%~10%和16%~22%两个区间,矿区存在低温和中温两类成矿流体,该类流体属于少量油田水混入的Na~+-Mg~(2+)-SO_4~(2-)-Cl~-型流体,结合富乐矿区矿体及矿石组构特征分析,该区成矿流体具有低温和中温流体混合特征,在成矿流体混合部位形成富厚矿体。该成果为认识该区铅锌成矿作用提供了新的地球化学证据。
Yunnan Luoping Fule Pb-Zn deposit is the latest large-scale lead-zinc ore deposit in the lead-zinc mineralization area of Sichuan, Yunnan and Guizhou provinces. The study on the ore-forming fluid is weak and the understanding of the lead-zinc mineralization process lacks the actual geochemical basis. The study on the fluid inclusions of sphalerite in this deposit and its adjacent ore deposits shows that the fluid inclusions in the zinc (sphalerite) ore deposit in this area are dominated by gas-liquid inclusions, followed by multi-phase inclusions containing sub-minerals, The homogenization temperatures of sphalerite fluid inclusions obtained by microscopic temperature measurement are mainly distributed in two intervals of 120 ~ 160 ℃ and 180 ~ 210 ℃. The salinity distribution is between 4% ~ 10% and 16% ~ 22% Low temperature and medium temperature. These fluids belong to Na ~ + -Mg ~ (2 +) - SO_4 ~ (2 -) - Cl ~ - fluid mixed with a small amount of oilfield water. Combined with the orebody and ore According to the analysis of the structural features, the ore-forming fluids in this area have mixed characteristics of low temperature and medium temperature fluid, forming rich orebodies in the mixed part of ore-forming fluid. The results provide new geochemical evidence for understanding the Pb-Zn mineralization in this area.