Geochemical Exploration Model Of Gold Deposits In The Western Qinling Region

The West Qinling is an important gold metallogenic belt in the western part of China.Three typical and representative gold deposits are selected in this article,including Shuangwang gold ore deposit,Yangshan gold ore deposit,and Zhaishang gold ore deposit.By using the technical method of establishing the typical ore deposit geochemical prospecting model,which is adopted by the national mineral resources potential evaluation project.This paper synthetical analysised the geological characteristics and geochemical characteristics of three gold deposits,and then established the geochemical prospecting model of the three gold deposits respectively.Comprehensive analysed their similarities and differences,and established the gold ore deposits' geochemical prospecting model of the West Qinling region.The Devonian sequences is the principal ore-host strata of Shuangwang gold ore deposit,composed of limestone and slate.The gold body is visible on the surface,and under the control of fault.Mineralization is associated with breccia.The indicator elements combination for prospecting in regional geochemical exploration is made up of 12 elements,including Au,Ag,As,B,Bi,Hg,Ni,Pb,Sb,Th,U,W,and the possible indicator elements are Cu,Sn,Zn.The rock geochemical exploration prospecting indicator elements combination is made up of 9 elements,including Au,Ag,As,B,Co,Hg,Mo,Ni,W.The universal geochemical exploration prospecting indicator elements combination of Shuangwang gold deposit is made up of 7 elements,including Au,Ag,As,B,Hg,Ni,W.The Devonian sequences is the principal ore-host strata of Yangshan gold ore deposit,composed of phylite and limestone.The gold body is visible on the surface,and under the control of fault.Mineralization is associated with silicification,pyritization.The indicator elements combination for prospecting in regional geochemical exploration is made up of 15 elements,including Au,As,Ba,Bi.Cu.Hg,Li,Mo,Ni,Sb,Th,V,W,Y,Zn.The rock geochemical exploration prospecting indicator elements combination is made up of 7 elements,including Au.Ag.As.Hg.Mo.Sb,W,and the possible indicator elements are B,Ba,Be,Cd,Cr.F,La,Li,Nb.Sn.Sr,Th,U,V,Y,Zr.The universal geochemical exploration prospecting indicator elements combination of Yangshan gold deposit is made up of 11 elements,including Au,As,Ba,Hg,Li,Mo,Sb,Th,V,W,Y.The Devonian and Permian sequences is the principal ore-host strata of Zhaishang gold ore deposit,composed of slate and limestone.The gold body is visible on the surface,and under the control of fault and folding.Mineralization is associated with.silicification and carbonation The indicator elements combination for prospecting in regional geochemical exploration is made up of 12 elements,including Au,As,B,Bi,Cu,Hg,Li,Ni,Sb,Th,U,W,and the possible indicator elements are Ag,Mo,Cr.The rock geochemical exploration prospecting indicator elements combination is made up of 11 elements,including Au,Ag,As,Ba,Hg,Mo,Pb,Sb,W,Y,Zn,and the possible indicator elements are B,Be,Cd,F,Li,Nb,Th,U,Zr.The universal geochemical exploration prospecting indicator elements combination of Zhaishang gold deposit is made up of 11 elements,including Au,Ag,As,B,Hg,Li,Mo,Sb,Th,U,W.The West Qinling gold deposits with similar geological background,which universal exploration prospecting indicator elements combination is include Au,Ag,As,Hg,Mo,W,we should pay special attention to these elements in the regional geochemical prospecting.