The Kuergasheng Pb&ndash
Zn deposit is located in the Western Tianshan Orogen, Xinjiang Province, China. The ore bodies are mainly hosted in sandstone of the Tuosikuertawu Formation and are controlled by NW-trending faults. Three paragenetic stages were identified: early pyrite&ndash
chalcopyrite&ndash
quartz veins (stage 1), middle galena&ndash
sphalerite&ndash
quartz veins (stage 2), and late sulfide-poor calcite&ndash
quartz veins (stage 3). Fluid inclusions (FIs) include liquid-rich aqueous (LV-type), vapor-rich aqueous (VL-type), halite-bearing (S-type), and monophase liquid aqueous (L-type). Homogenization temperatures for FIs from stages 1&ndash
3 are 221&ndash
251, 173&ndash
220, and 145&ndash
172 °
C, respectively. Stage 1 fluids in LV-, VL-, and S-type FIs yield salinities of 6.2&ndash
9.6, 1.7&ndash
3.1, and 32.7&ndash
34.9 wt % NaCl equiv., respectively. Stage 2 fluids in LV- and S-type FIs have salinities of 5.1&ndash
7.9 and 31.9&ndash
32.1 wt % NaCl equiv., respectively. Stage 3 fluids in LV- and L-type FIs have salinities of 3.4&ndash
5.9 wt % NaCl equiv. Oxygen, hydrogen, and carbon isotopic data (&delta
18OH2O = &ndash
7.7 to 1.7&permil
&delta
DH2O = &ndash
99.2 to &ndash
83.1&permil
13CH2O = &ndash
16.6 to 9.1&permil
) indicate that the ore-forming fluids have a hybrid origin &mdash
an initial magmatic source with input of meteoric water becoming dominant in the later stage. Sulfur and lead isotopic data for galena (&delta
34S = 5.6 to 6.9&permil
206Pb/204Pb = 18.002&ndash
18.273, 207Pb/204Pb = 15.598&ndash
15.643, 208Pb/204Pb = 38.097&ndash
38.209) reveal that the ore-forming materials were mainly derived from the Beidabate intrusive body and the Tuosikuertawu Formation.