Geological Characteristics and Origin of the Hongqi Lead-Zinc Deposit in Xiuyan, Liaoning

The Xiuyan Hongqi lead-zinc Mine is located in the middle of the Liaodong Rift Zone on the eastern section of the northern margin of the North China Craton. This deposit is mainly located in the metamorphic rock series of the Gaixian Formation of the Liaohe Group in the Paleoproterozoic, and its overall distribution is highly consistent with the direction of regional fault structures. The alteration of surrounding rocks and mineralization are both strictly controlled by the structure. The ore-forming fluids exhibit significant characteristics of medium temperature and low salinity. The δ34S value of the sulfide ranges from 0.9% to 7.5%, with an average of 3.3%, indicating that the deposit has the characteristics of magmatic sulfur. The lead isotopes of the ore, 206Pb/204Pb, range from 18.32 to 18.37, with an average of 18.35. The values of 207Pb/204Pb range from 15.68 to 15.74, with an average of 15.72. The 208Pb/204Pb ratio ranges from 38.48 to 38.75, with an average of 38.61. The variation range of the μ value is 9.63 to 9.77, with an average value of 9.71. These data all indicate that this deposit has the characteristics of lead in the upper crust. Based on the background of metallogenic dynamics, the geological characteristics of the deposit and the research results of ore-forming fluids,It is concluded in this study that the Hongqi Lead-Zinc deposit belongs to a mesothermal hydrothermal vein-type filling deposit associated with magmatic processes.