Located in Yining County of Xinjiang, the Qiongbulake copper deposit was formed in relation to magmatic hydrothermal fluids. These fluids formed a stockwork of calcite veinlets. On the basis of the studies by means of inclusion petrography, microthermometry and carbon, oxygen stable isotope, the authors systematically studied characteristics of the ore-forming fluids and the origin of the Qiongbulake copper deposit. Three types of fluid inclusions in calcite were recognized. On the whole, the Qiongbulake copper deposit is a moderate-low hydrothermal ore deposit. oft-com:office:office" />