Geochemical Prospecting Model For Gold Deposits In The Middle And Southern Part Of Sanjiang,Southwest China

The middle and southern part of Sanjiang in Southwest China is a potential gold mineralization area.In this paper,three ore deposits are selected as the representative deposits in this area: the Suoluo Gou gold deposit in Sichuan,the Laowang Zhai and the Bei Ya gold deposits in Yunnan.On the basis of collecting the regional geological data,geological data and geochemical data of the three typical deposits,the geological and geochemical characteristics of the typical gold deposits in this area are summarized,comprehensively analyzes there characteristics and then the general prospecting indicator elements in the middle and south section of Sanjiang are determined,and then the geochemical prospecting model of the deposits in the middle and southern part of Sanjiang is established.The conclusion is as follows.The ore bodies of the Suoluo Gou gold deposit in Sichuan are exposed to the Triassic tuff,the gold deposit is controlled obviously by fracture,and the mineralization is related to pyrite mineralization and arsenopyralization.The geochemical prospecting indicator elements are Au,Cd,Pb,As,Cr,Ni,and the possible indicator elements are Ag,Cu,Zn,Hg,Sn,Sb,B,Li,Th,U,Y,La,V,Co.Rock geochemical prospecting indicator elements are Au,Ag,Ba,Co,Cr,Cu,La,Nb,Ni,Sn,Sr,V,Y,Zr,and the possible indicator elements are As,Au,B,Be,Bi,Cd,F,Hg,Li,Sb,W.The general prospecting indicator elements for the deposit are Au,Ag,As,Cr,Ni,Co,Cu,La,Sn,V,Y.The ore bodies of the Laowang Zhai gold deposit in Yunnan province are exposed,and the ore bearing strata are siliceous slate and quartz sandstone in the upper Devonian,lower Carboniferous and upper three strata.The gold deposits are controlled obviously by fracture,mineralization is related to pyrite mineralization and arsenopyralization.The geochemical prospecting indicator elements are Ag,As,Au,Ba,Co,Hg,Ni,Sb,W.Rock geochemical prospecting indicator elements are As,Au,Cr,Ni,Sb,Sr,W,Zn,and the possible indicator elements are Ag,B,Be,Cd,F,Li,Nb,Sn,U,V,Y.The general prospecting indicator elements for the deposit are As,Au,Ni,Sb,W,Ag.The ore bodies of the Beiya gold deposit in west Yunnan province are exposed.The main ore bearing strata are fine grained limestone of middle three series,the ore body is controlled obviously by fracture structure,mineralization is related to pyrite mineralization and skarn.The geochemical prospecting indicator elements are Ag,As,Au,Ba,Bi,Cd,Cu,Hg,Mo,Pb,Sb,W,Zn,Zr.Rock geochemical prospecting indicator elements are Ag,As,Au,Cu,Pb,Zn,and the possible indicator elements are B,Ba,Be,Bi,Cd,Co,Cr,F,Hg,La,Li,Mo,Nb,Ni,Sb,Sn,Sr,Th,U,V,W,Y,Zr.The general prospecting indicator elements for the deposit are Ag,As,Au,Cu,Pb,Zn,Ba,Bi,Cd,Hg,Mo,Sb,W,Zr.The universal indicator elements for prospecting in The middle and southern part of Sanjiang are Au,Ag,As,Cu,Sb,W in total.