The Damoqujia gold deposit, discovered recently and located in the north of Zhaoping fault zone, is a large altered rock type deposit. In this paper, we report the preliminary research results of the fluid inclusions and discuss its metallogenic implications. The homogenization temperatures of fluid inclusions fall into four ranges: 310 similar to 350 degrees C, 230 similar to 270 degrees C, 160 similar to 200 degrees C and 110 similar to 150,C; corresponding to the four stages of hydrothermal ore-forming processes: coarse grain pyrite-milk white quartz stage ( I), smoky gray Au-hearing quartz-fine grain pyrite stage (II) Au-bearing polymetallic sulfide-quartz stage (III) and quartz-carbonate stage (IV). 3 Ore-forming fluid is with low salinity and low density, ranging from 1.4 Wt(NaCl)% to 13.6 Wt(NaCl)% and from 0.48g/cm(3) to 1.03g/cm(3) respectively. The inclusions are dominated by H2O and CO2 in gaseous compositions, and Na+ and K+ in positive ions, SO42- and Cl in negative ions of liquid compositions. Au-S complex is the major form for transportation of gold. The pressure varied from 260MPa to 340MPa during the formation of CO2-bearing inclusions at the early mineralization; the fluids are rich in SO42- - and Na+ The pressure is 26 - 49 x 10(5) Pa during the formation of the aqueous salt inclusions in late mineralization, the inclusions are rich in Cl F Na+. delta O-18(quartz) is 10.64 similar to 12. 68 parts per thousand, and the corresponding delta O-18(H2O) and delta D is -5.44 similar to 6. 47 parts per thousand and -95. 52 similar to - 106.48 parts per thousand respectively. Based on the studies about compositions and hydrogen and oxygen isotopes of inclusions, it is evidenced that ore-forming fluid is magmatic hydrothermal fluid in early period, but affected by meteoric water in late.
