Fluid inclusions sampled from mother lodes of Xin'anzi quartz type W-Sn deposit were examined by petrography,microthermometry and Raman microprobe.The results show that: ① the homogeneous temperatures of fluid inclusions in the quartz distribute intensively in three intervals,i.e.320 ℃~360 ℃,260 ℃~300 ℃ and 180 ℃~230 ℃,which might correspond to the three stages of the whole ore-forming process.Wolframite is formed mainly in the high-temperature stage while sulfides in the medium-temperature stage;② The proc...