Metallogenic Characteristics And Genesis Of Qiqiu 3~# Gold Deposit In Tori County,Xinjiang

The prospecting potential of Qiqiu 3~#gold deposit is huge,but the lack of research in this area and other factors restrict the prospecting breakthrough.In order to increase the reserves of resources in this area,it is necessary to conduct a thorough and comprehensive study of the deposit.On the basis of fully ascertaining the geological background and geological characteristics of Qiqiu 3~#gold deposit.Through the study of physical and chemical conditions in the mining area,the evolution process of the gold deposit has been ascertained,and the genesis of the deposit has been clarified.Orebody occurs mainly in volcanic rocks of the Tailegula Formation,and the ore-controlling structure is mainly the Anqi-Hatu fault.The ore mineral assemblage of Qiqiu 3~#gold deposit is relatively simple,including pyrite,arsenopyrite and natural gold.Quartz,sericite and chlorite are the main gangue minerals.Silicification is the main wall rock alteration in this area,followed by sericitization,chloritization and carbonation.Pyrite mineralization and arsenopyrite locally occur in the mineralization enrichment area.Metallogenesis can be roughly divided into three stages:the early pyrite-quartz stage,the middle quartz-natural gold-sulfide stage and the carbonate stage.Gold is mainly formed in the middle stage.Metallogenesis is related to the activity of concealed rock mass.The early stage is magmatic water,and the late stage is mixed with atmospheric water.The ore-forming fluids are mainly gas-liquid two-phase,with homogenization temperatures ranging from 210 to 250 C and salinity ranging from 5%to 7%.S isotope reflects that the ore-forming material is related to magma,and H-O isotope determination results indicate that the salinity distribution of ore-forming fluid should be the result of the mixing of magmatic hydrothermal fluid and atmospheric precipitation.Qiqiu 3~#gold deposit belongs to mesothermal hydrothermal vein type deposit.Metallogenic prognosis was carried out by extracting comprehensive prospecting information.