The Geological Characteristics And Prospecting Direction Of The Paoshouyingzi Gold Exploration Area In Dandong Liaoning Province

The gold exploration area of Paoshouyingzi in Liaoning Province is located in the middle part of Fengcheng uplift at the eastern end of Yingkou-Kuandian platform arch of Liaodongtai anticline,the southwest section of Yalujiang metallogenic belt,the periphery of Wulong gold deposit and Sidaogou gold deposit.The liaohe group strata with a high background value of gold elements are distributed in the region,which have formed complex geological structures through multiple extrusion and shear actions and have frequent magmatic activities,providing a good geological tectonic environment and metallogenic geological background for the formation of regional gold deposits.The formation of liaohe group gexian formation is only found in the southeast corner of the exploration area of Paoshouyingzi gold.The folded structures in the study area are not developed,and they are mainly brittle faults,which show the nne,nw and nw directions.Regional magmatic activity is frequent,formed a series of granitic rocks,the main lithology as paleoproterozoic hemp monzonitic granite,time for three granodiorite,flow and development of acidic dike swarm,paleoproterozoic piece of hemp shape monzonitic granite is the main ore-forming rock,liaodong wulong gold mine mylonitization generally,has a low melting point,low heat,short migration distance,the depth of emplacement,granodiorite and three flow has a wide scope of evolution,on the gold migration ability is good,good differentiation,high emplacement,three flow granodiorite and the ore-forming material source of gold orebodies with consistency,thermodynamic source for the formation of gold deposit.Thirteen gold mineralized bodies have been found in the exploration area,and the mineralized bodies are mainly produced in the paleoproterozoic gneisite-like cataclastic granites.The mineralized veins account for less than 10% of the total veins,which shows that the gold mineralized bodies are controlled by quartz veins,but at the same time,the gold mineralized bodies in the area are restricted by multiple factors of strata,structure and magmatic rocks.The mineralization type is mainly quartz vein type ore body,which is characterized by small scale,lenticular shape and uneven mineralization.Structure is the main controlling factor of gold mineralization in exploration area.Most of the mineralized bodies were found in the near east-west and nw brittle fault zones,and a small number of them were found in the nw fault structures,mainly distributed at the intersection of nw schistosomitic zones and nw faults.According to the results of this exploration,the orebody characteristics of the typical deposit(wulong gold deposit)were compared,and the ore-prospecting model of the exploration area of jianshou yingzi gold was summarized,and the ore-prospecting direction of the next step was determined.There are two directions for gold exploration in this area.One is quartz veins in the paleoproterozoic gneisse-shaped monzogranite with the alteration characteristics of pyrite,chlorite and mylonitization in the lijiabaozi section of the area.The other is the near east-west zonal IP anomaly in the south of yanjiagou(two-stage rock contact zone).