The Metallogenic Prediction Of The North West Ore Block In The Mengya' A Lead And Zinc Deposit Of The Tibet

Based on the system to collect and absorb deposit exploration results data and related literature,and comprehensive understanded the geological characteristics of mengya'a lead and zinc deposit of the tibet.According to the idea of the metallogenic prediction the must determine the ore-forming elements and methods,ultimately build forecasting model.Through in-depth study of metallogenic elements,analysis of existing methods work effectiveness,rock geochemical survey,alteration mapping and so on.in orde to determine the forecast factors and build forecasting model,in the end to carry out the metallogenic prediction.The study found that control of main geological factors of mining area mineralization is the sandstone splint rock of C₂P₁l³ of active and stable lithology zone irregular distribution.And widely distributed"Z"shaped subordinate fold of the tang gu-ba ga anticlinorium and the stratigraphic level and axial plane joint joint fissure system relevant to the fold,and deep magma ore-forming hydrothermal system.Mining area has carried out prospecting methods of geophysical exploration,remote sensing work.Unable to determine the exclusive sign in the orebody or mineralization related to rock mass,do not constitute elements method.The project carried out rock geochemical survey,the comprehensive anomaly of leading dizzy Ag-As-Sb,central dizzy Cu-Pb-Zn,tail dizzy W-Sn-Mo,anionic Cl-F-B-S-Se-Te are correlation with known orebodies.It can more effectively indicates the existence of ore body,so can be used as a method.The project carried out alteration mapping can effectively reflect the scope of hydrothermal activity,and its sericite-chlorite composite superimposed anomaly area have close correlation the known ore body,so can be used as a method.In view of the ore-forming geological elements,or widely exists in the mining area,or irregular distribution but widespread favorable lithology section,ground did not see or can't express.So eventually build leading dizzy+central dizzy+tail dizzy,complex anion element+simple anion element anomalies,sericite-chlorite composite superimposed anomaly area,three methods elements prediction model.Puting forward the prospecting direction of the north west ore block is aiming at blank area delineated by 6 class A exploration target areas,2 class B exploration target areas,1 class C exploration target areas.