地质与勘探2018，Vol.54Issue(3)：456-464,9.
云南都龙锡锌多金属矿床曼家寨矿段流体包裹体研究
Characteristics of Fluid Inclusions in the Manjiazhai Mining Section of the Dulong Sn-Zn Polymetallic Deposit,Yunnan Province
摘要
Abstract
As one important component of the polymetallic mineralization belt in southeastern Yunnan Province,the Dulong Sn-Zn polymetallic de-posit consists of five mining sections: Tongjie, Manjiazhai, Lazizhai, Wkoudong and Nandangchang, of which only Manjiazhai is a large one. Taking Manjiazhai as the object,based on field surveys and microscopic observations,This work studied geological features and measured temperature of fluid in-clusions of the deposit. Some insights are obtained as follows:(1)The main host minerals are calcite and quartz,dominated by liquid-rich inclusions, with a few vapour-rich inclusions. There are two primary types of ore-forming fluids:NaCl-H2O and CO2-H2O. For type NaCl-H2O,the ranges of homogeneous temperature,mineralizated fluid salinity and fluid density are 145.1℃ ~247.6℃,2.07wt% NaCleqv~12.96wt% NaCleqv,and 0.84g ·cm-3~0.98g·cm-3, respectively. For type CO2-H2O, the ranges of homogeneous temperature and mineralization fluid salinity are 145.4℃ ~341.9℃ and 7.38wt% NaCleqv~17.48wt% NaCleqv, respectively. (2)Overall, the mode of ore-forming fluid has changed from high-temperature and high-salinity fluids into low-temperature and low-salinity fluids. At the same time,the ore-forming fluid may be have the characteristic of im-miscibility and ebullition.(3)Comprehensive study suggests that stratiform skarn is the product of magmatic hydrothermal fluids reaction with wall rock. With changes of physicochemical conditions and boiling action,massive amount of sediments of metalliferous mineral might be precipitated from the fluids.关键词
都龙锡锌矿/流体包裹体/多金属矿床/均一温度/盐度/云南Key words
Dulong Sn-Zn polymetallic deposit/fluid inclusion/polymetallic deposit/homogenization temperature/salinity/Yunnan分类
天文与地球科学引用本文复制引用
黄珊珊,燕永锋,贾福聚..云南都龙锡锌多金属矿床曼家寨矿段流体包裹体研究[J].地质与勘探,2018,54(3):456-464,9.基金项目
国家自然科学基金面上项目"滇东南老君山多金属矿集区层控矽卡岩成因与成矿作用"(编号:41373050)资助. （编号:41373050）
