基于夏隆罗布幅的地球化学异常找矿与解译OA

The Xia Longluo Bu area is located in the Pan Gong Lake-Nujiang metallogenic belt in northwest Tibet,characterized by extensive Quaternary deposits and poor exposure of bedrock,resulting in relatively complex conditions for nonferrous metal prospecting.Based on 1:50,000 hydrogeochemical survey data of stream sediments,this study conducted statistical analysis,factor analysis,and comprehensive anomaly extraction for 16 elements,including Au,Ag,Cu,Pb,Zn,As,Sb,Bi,Hg,Cd,W,Mo,Sn,Cr,Co,and Ni.A comparison was made between the percentile method and the iterative method for anomaly identification.The results indicate that Au,As,Sb,Bi,Pb,and Sn are the primary metallogenic indicator elements.The anomalies delineated by the iterative method are more concentrated and better suited for the selection of nonferrous metal prospecting targets.The HS-1 comprehensive anomaly is dominated by Au,Bi,Pb,Sb,and Sn,accompanied by As,Hg,Mo,and W,exhibiting distinct multielement superposition and spatial zonation characteristics.Integrating structural,remote sensing alteration,and gravity-magnetic information,it is inferred that HS-1 may be related to deep-seated magmatic-hydrothermal metallogenic processes,making it a priority area for polymetallic mineral exploration in the region.Key tasks include surface reconnaissance,denser surveys,trench excavation,and deep verification.