Quantitative Prediction Of Porphyry Copper Minerals In Bairong-Tinggong Area Of Tibet

The study area is located in the central and southern part of the qinghai-tibet plateau,and the tectonic structure is located in the northern margin of gondwana continent,that is,the southern margin of the middle section of gondes-nyenching tanggula plate,and the southern part is close to the yalu zangbo river suture zone.In this article,the typical ore deposit is selected,and the ore-forming elements are extracted by combining the geological characteristics of the typical ore deposit with the ore-forming geological background.Based on the study of Geophysical exploration,geochemical exploration and remote sensing characteristics in the study area,the results of various methods working information carried out on the surface are analyzed to determine the method elements of mineral prediction.Mineral prediction factors are determined based on metallogenic factors and methodological factors,and the ring zone model and calculate the amount model are constructed according to the mineral prediction factors,so as to delineate and optimize the minimum prediction area and conduct quantitative mineral prediction for the research area.Through research,the following understandings are obtained:(1)Through the study of metallogenic geological background,the construction characteristics and ore-bearing characteristics in the area are clarified.Combined with mineral analysis,the ore-bearing formations are acidic and intermediate-acidic.(2)Through the study of typical deposits.Post about mine main ore rock mass is porphyritic biotite monzonitic granite as the main ore rocks,second occurrence granite diorite porphyry,combined with regional mineral and rock mass distribution characteristics,typical ore deposits(points)on the space relationship and post about the formation process of copper and molybdenum,the duty to speak porphyry copper deposits in the distribution and scale of the acidic mining area is close to the rock mass.Based on the study of the relationship between structure and mineral distribution in the area,it is found that there are mineral deposits at the intersection of faults.Because the faults are very developed in the zone,they have obvious ore-controlling effect.The author thinks that the intermediate-acid composite rock mass has the exclusive mark indicating the mineral distribution,and can be used as the metallogenic element for mineral prediction,and the structure can be used as the favorable factor for this prediction.(3)Through the study of geophysical,geochemical and remote sensing characteristics,the validity of prospecting method information is analyzed,and the information elements of mineral prediction method are determined.(4)Based on metallogenic elements and method elements,the prediction is determined as mineral display,alteration assemblage,influence of medium acidic rock mass,small/hidden rock mass,small magnetic mass,geophysical exploration,geochemical exploration and remote sensing.(5)The minimum prediction area was divided into grade A(5),grade B(18)and grade C(26).A resource quantity estimation model was constructed to predict that the copper resources in the predicted work area of the white capacity-hall were 14.16 million tons,the copper resources under control were 3.2 million tons,and the copper resources under control(above 333)were 10.96 million tons after deducting them.The results show that the study area has better metallogenic conditions,great resource potential and good prospecting prospects.