Study On Fault Geochemistry And Ore-finding Prognosisin The Beiya Porphyry-type Gold Poly-metallic Mining District,Northwestern Yunnan,China

The Beiya gold deposit which is located in Northwestern Yunnan is the ty pical representative of the skarn-porphyry deposit.The distribution of the ore d eposit is closely linked with the structure and porphyry.It lay the foundation o f the application of the tecto-geochemical method.Based on the analysis of re gional metallogenic background and geological characteristics of mining area.T hrough fine analysis structure of five short sections.We find this point.(1)discuss the tectonic geometry,kinematics,,tectonite and the characteristic of ore controlling structure,distinguish the difference between the early and late ore structure,we think the SN structure is the important ore controlling struct ure.(2)Through the analysis of the content of the five profile element and rati o,disscuss the distributive characteristics of hypothermal and epithermal minera lization element.We think hypothermal mineralization element gathered inside of porphyry,low t epithermal mineralization by contrary.Through the R clusterin g ana-lysis and factor analysis of structure rock,get the two ore-forming eleme nts association:Au-Ag-Fe-Cu-Sb-Hg-Sn-Pb-Co-Mo;Zn-Pb,then produce tectogeochemical map.(3)We can confer the movement direction of ore-forming fluid and orebo dy occurrence from this.At the same time,we think although the mentalognic scale of Bijiashan ore section is smaller than Wantongshan ore section,and th ere is a great prospecting pontential in Bijiashan.