Ore-forming Geological Conditions And Prospecting Of Gold Deposit In Caomaoshan Area,Huma Country,Heilongjiang Province

The Caomaoshan is located in Huma Country of Heilongjiang Province,on the border of the northeast of Daxing'anling and the northwest of Xiaoxing'anling,the west of Yilihuli,Xing'an-Mongolia orogenic belts.In recent years,great progress has been made in this area,1:250000 regional geological surveys have been completed,systematic stratigraphic sequence was established,the age of intrusive rocks was determined and the mineral resources in the area were investigated.In the research area,1: 50000 geochemical exploration has been completed,and many anomalies have been delineated.The research area is located in the northeast section of middle Daxing'anling of Fe,W,Ag,Au,Mo and Cu mineralization belt,and many gold deposits are found in this metallogenic belt.The main ones are Xinglonggou,Jilonggou,Sanfenchu,Heilonggou-Walali,Kuanhe and Beixili,etc.In addition,there are many rock gold,copper,polymetallic,iron and nonmetal mineralized points.The gold in this area is rich,its size and reserves are considerable.Due to long-term mining,until 1999,the gold has been exhausted,the mining of placer gold remains in the valley.This paper selects deposits of Sanfenchu,Xinglonggou and Sidaogou to make a statement.Based on the " 1: 50000 geological survey of Caomaoshan county,Heilongjiang province ",this paper summarizes the metallogenic geological conditions,geophysical prospecting data and geochemical exploration data,and makes a preliminary analysis and study on the metallogenic regularity of this area.The Guanghua group and the Niqiuhe group are the ore source beds,the granite porphyry and granite dionite porphyry are provide sources of heat and material,and the NNE and NE tectonic-magmatic activities are beneficial to the hydrothermal activity.From the results of 1: 10000 anomalies,there are obvious anomalies in the gold mineralization spots in the area.Au elements in the area have the characteristics of obvious concentration zonation,large distribution area,high intensity and large scale.Combined with Caomaoshan area integratedgeological,geochenmical and mineral information,in this paper,total of making out two ?class metallogenic prospect areas,namely Chuonahe and Xinangou.Combine with prospective area prospecting potential evalution,finally selected two ? forecasting area for prospecting target,namely Chuonahe and Xinangou and three ? forecasting area for prospecting target,namely Sanbaoshan,Caomaoshan and 554.