Geochemical Explorationmodel Of Gold Deposits In Northern Margin Of North China Metallogenic Province

The geological environment in northen margin of North China metallogenic province is complex,there has abundant gold resources.This paper is based on the metallogenic geological setting of the northern margin of North China metallogenic province,Four typical gold deposits are selected which include Wenzhangzi in Liaoning Province,Yuerya and Dongping in Hebei Province and Yixingzhai in Shanxi Province.The geological characteristics of each deposit are summarized includes the orebody's exposed state and the orebody shape.Calculate the maximum value,minimum value,median value of the rock and region geochemical data for each deposit.According to the classification of the seven level exceptions,original data were graded and geochemical anomaly map were maked.Then,the assemldage indicater elements of geochemical survey and geochemical exploration models of the gold deposits in northen margin of North China metallogenic province were derived.The geological characteristics and the combination of geochemical prospecting elements of four typical deposits were summarized.Wenzhangzi gold deposit is magmatic hydrothermal type,ore body is exposed,the gold body is obviously controlled by faults.the shape of orebody are veins and lentil.The assemldage indicater elements of regional geochemical survey is Au,Ag,Cu,Pb,Cd,Sr,and in rock rock geochemical exploration is Au,W,Mo,Pb,Ag,Sr,Ba,Cu.Yuerya gold deposit is magmatic hydrothermal type,ore body is exposed,the gold body is obviously controlled by faults.the shape of orebody are veins and lentil.The assemldage indicater elements of regional geochemical survey is Au,W,Sn,Mo,Bi,Cu,Pb,Zn,Cd,Ag,As,Sb,Hg,B,F,Be,La,Th,U,and in rock rock geochemical exploration is Au,Bi,Mo,Cu,Pb,Ag,U,Cr.Dongping gold deposit is magmatic hydrothermal type,ore body is exposed,the gold body is obviously controlled by faults.the shape of orebody are veins and lentil.The assemldage indicater elements of regional geochemical survey is Au,Mo,Bi,Pb,Ag,As,Hg,B,Sr,and in rock rock geochemical exploration is Au Au,Zn,Sr,Ba.Yixingzhai gold deposit is magmatic hydrothermal type,ore body is exposed,the gold body is obviously controlled by faults.the shape of orebody are veins and lentil.The assemldage indicater elements of regional geochemical survey is Au,Mo,Bi,Cu,Pb,Cd,Ag,Sb,U,Cr,and in rock rock geochemical exploration is Au,W,Bi,Cu,Pb,Zn,Ag,Hg,Sr,Ba,Cr,Co.The assemldage indicater elements of regional geochemical survey is Au,Mo,Bi,Cu,Pb,Cd,Ag.The anomaly intensity of the main mineralizing elements(Au)is usually greater than 3,The anomaly intensity of the associated elements(Mo,Bi,Cu)is usually greater than 2,The anomaly intensity of the associated elements(Pb?Cd?Ag)is usually greater than 1.The assemldage indicater elements in rock geochemical exploration is Au,Cu,Ag,Pb,W,Bi,Sr,Ba,Cr.The anomaly intensity of the main mineralizing elements(Au)is usually greater than 4.The anomaly intensity of the associated elements(Cu?Ag)is usually greater than 2.The anomaly intensity of the associated elements(Pb?W?Bi?Cr)is usually between 1 and 2.The anomaly intensity of the associated elements(Sr?Ba)is usually less than 1.The assemldage indicater elements of geochemical survey in northen margin of North China metallogenic province is Au,Ag,Cu,Bi and Pb.