Geochemical Characteristics And Prospecting Prospect Analysis Of 1:50000 Stream Sediment Survey In Wulanwuzhuer Area,Qimantage,Qinghai Province

The study area is located in the northwest of Qimantage area,which has a good metallogenic geological background and prospecting potential.The geotectonic position spans three third grade tectonic units of the north slope of Qimantage-the Xiarihamu magmatic arc,the Qimantage ophiolitic melange belt and the North Kunlun magmatic arc.The geological and scientific research work of different periods and natures has greatly improved the coverage of geological work in the study area,and has made a series of understanding and breakthroughs in regional geological background,metallogenic law,prospecting potential and other aspects.In recent years,1:200000,1:250000 Regional Geochemical Exploration,1:50000 geological and Mineral Investigation and mineral exploration work have been carried out,laying a solid data foundation for the exploration breakthrough in this area.Through the work,Further understanding of mineralization,genetic type of ore deposits,prospecting direction and other aspects has been made,and the huge prospecting potential of the study area has been clarified.Based on the project of "Integration of multi-element geological information and prospecting prediction of 1:50000 ore transfer in Qimantage area,Qinghai Province",On the basis of collecting previous data,geochemical characteristic parameters are extracted,analyzes geochemical characteristics and prospecting prospect in combination with geological background,and further provides a basis for ore prospecting in this area in the future.Through the processing and analysis of 1:50000 stream sediment sample data in the study area,the geochemical characteristics of 15 elements(AU,Ag,as,Sb,Cu,Pb,Bi,Zn,W,Sn,Mo,Cr,Ni,Co,Hg)in the study area are systematically studied.The results show that the element abundances of W,Sn,Bi,Mo,Hg,Pb,Zn,Ag are significantly higher in the area,and the element abundances of Pb,Sn,Bi,Mo are significantly higher than those in the East Kunlun area.This feature indicates that the study area has strong hydrothermal activity,developed fault structure and great ore-forming potential.The results of discrete feature analysis show that Cu,Bi,W,Zn,Au,Pb and other elements have great metallogenic potentia,As,Sb,Ni,Cr,Mo,Sn,Ag and other elements have certain metallogenic potential.According to the cluster distribution of geochemical synthetic anomalies and the distribution characteristics of various mineralized spots found in the study area,three geochemical anomaly zones,namely,Tanbeixuefeng-Wulanwuzhuer,Qimantage-Kendekeke,and Kaerqueka-Naxiguole are classified.In the study area,the contrast value anomaly was used to delineate 265 comprehensive anomalies in 1:50,000 stream sediment survey,including 15 comprehensive anomalies of class A,125 comprehensive anomalies of class B and 125 comprehensive anomalies of class C.This study shows that 1:50000 stream sediment survey is carried out in a large area of areas with complex geological background,and the contrast value anomaly is delineated by geoexpl software.This mapping method can eliminate or weaken the geochemical background differences of different geological units,which is worth popularizing and applying in similar research work.Through the study of geological conditions in the study area,the minerals are mainly distributed in qimantager group,Langyashan group,dagangou group and Jinshuikou group,among which the Jinshuikou group and dakendaban group are mainly enriched with Au,Ag,W,Sn,Cu,Pb,Zn,Cr,Co,Ni and other elements,which basically determines that the main ore-forming minerals in the area are dominated by them;Cu,Pb,Zn,Ag,Bi,Sn,CO and other elements are preliminarily enriched in the qimantager group,laying the material foundation for mineralization and forming an important source bed in the area.The main ore-forming types are strata controlled,skarn,hydrothermal,porphyry and structural altered rock.The focus and focus of ore-hunting should be placed on the study of Langyashan formation,Qimantage group,marginal depression zone of intermediate acid rock mass,main fault,secondary fault and porphyry.On the basis of comprehensive study of metallogenic geological conditions,41 prospecting targets have been delineated.On the basis of the original three metallogenic prospect areas(Wulanwuzhuer-Small basin,Yemaquan-Jingren and Bielisaibei),two new metallogenic prospect areas(Kaerqueka-Basitu,Mositu-Naxiguole)have been divided,and the prospecting direction of each area has been further clarified.