Comprehensive Information Prospecting Model of the Zhaishang Gold Deposit in Gansu Province

This paper systematically researched some prospecting information of the Zhaishang gold deposit,which included the geological,the geophysical and the geochemical(.1)The geological prospecting information:The Zhaishang gold deposit is located at the Xicheng-Fengtai-Zhenxun extensional rift basin,in the middle sector of the west Qinling Moutains.The ore is controlled by fault and fold structures,and the ore-bearing horizon are the clastic rocks and carbonate rocks of middle Devonian Anjiacha Formation and lower part of Lower Permian Shilidun Formation.It also produces in the NWW interlaminar faults.Silicification,pyritization,arsenopyrite and brown iron mineralization developed in gold deposit are the direct prospecting marks(.2)The geophysical prospecting information:Electrical measurement shows that the gold veins have low resistivity and high polarization.Electrical ore bodies and country rocks have big differences.Therefore,both of polarization anomaly,fracture zone and metal sulfide coexist in the Low resistivity zone,the prospecting is more significant(.3)The geochemical prospecting information:1 ∶200 000 and 1 ∶50 000 stream sediment anomaly in this area are in good agreement with the gold deposits.Moreover,Au,As,Sb,Hg anomaly obvious combined and strongly repeated.It plays an important role in the Zhaishang gold deposit discovery.By the way,the 1 ∶10 000 soil anomaly is more effective to prospecting mining.Summary of the above prospecting information,we established the prospecting model of the Zhaishang gold deposit and mine regional area.