关键词: 脉石英;包裹体;流体;岩相

Abstract: High quality vein quartz ore in Xingtai area of Hebei Province was studied .The fluid inclusions in quartz were analyzed by petrography , temperature measurement and composition analysis on the basis of optical microscopy and chemical composition .The results show that the content of SiO 2 in the quartz is as high as 99 .979%, and the fluid inclusions can be generally observed in the quartz grains , mainly in the state of gas-liquid two phases , and a small amount of gas , liquid and three-phase inclusions .Raman analysis show that the gas and liquid components are CO 2 , H2 O.The results show that the homogeneous temperature is 143-247 ℃, the average temperature is 196 ℃, the solubility of the neutron inclusions in three-phase inclusions is 160-180 ℃, and the corresponding mineral is nesquehonite .The ore-forming fluids of the quartz ore are considered to be medium-low temperature hydrothermal fluids .

Key words: vein quartz;inclusion;fluid;lithofacies