The Prospecting Potential Of Porphyry Copper Deposits Predicting Area In Tinggong-gangjiang,Tibet

Based on the system of collecting and digesting the Chongjiang area 1? 50 thousand regional geological survey,mineral resources survey and research literature on the basis of typical deposits,ore-forming elements;combined with the regional geological background,metallogenic prediction to determine the mineral elements;comparative study on the exploration results of various methods work achievements will be carried out on the surface information and typical ore deposit,determine the mineral elements prediction method,prediction model is constructed,prospecting target area,clear prospecting,obtain the following understanding:Determination of ore-forming elements: the study found that the main geological factors of metallogenic prediction control development area for fracture,composite parts are widely distributed in small area and acidic composite rock in widely distributed in the area of large intrusive body,deep magmatic hydrothermal system related.Prediction method of forecast factors determine the area to carry out remote sensing prospecting work,can not determine the indicator body or rock metallogenic elements can not be exclusive sign,construction method;geophysical exploration area to carry out the prediction of the magnetic body can reflect the degree of hydrothermal activity traces can be used as a predictive factor;forecasting area to carry out geochemical prospecting work.Sediment Cu anomalies and Cu-Mo-W anomalies,Cu-Pb-Zn-Au abnormal distribution area and well known mineral resources overlap,spatial distribution characteristics can indicate mineral,can be used as a predictive factor;prediction of mineral area from the combination,can reflect the areas of hydrothermal activity,the inhibition by minerals at low temperature high medium variable combination distribution area with the known mineral overlapped well,indicating the mineral spatial distribution characteristics,can be used as a predictive factor.Prediction model construction: in view of the widespread existence of tectonic complex faults in the region,3 prediction factors,including medium acid small rock mass,geochemical anomaly,high middle low temperature mineral alteration combination,are constructed to form prediction models.Based on the constructed prediction model,2 target level areas,5 B target zones and 4 C target zones are selected in the inner circle of the prediction area,which reflect the better working conditions of the prediction work area.