Abstract：There are many fluid inclusions in quartz in the Hatu gold deposit. they are small in size，mostly ranging from 3 to 5μm，and poorly developed，suggesting that they underwent tectonic compression during their formation. The ore deposit formed at middle temperatures and a low salinity. The water in the fluid inclusions is mainly magmatic water with minor meteoric water. The ore-forming material of the deposit was mainly derived from deep sources. REE and carbon isotope analyses of quartz inclusions in wall rocks and orebodies indicate that the source of the REE and the mineralizer elemental carbon has little relation to the wall rocks，and that the mineralization of the Hatu gold deposit was less influenced by strata. The study of ore fluids in the Hatu gold deposit suggests that the gold orebody may still extend downward to a certain depth.