The purpose of studying the geochemical anomaly characteristics and metallogenic and halting mechanisms of the main halo-geochemical anomalies in Luanchuan molybdenum ore field in East Qinling Mountains,is to find out the close relationship between the anomalies and the deposits,thus indicating the prospecting potential of the orefield and more accurate geological prospecting.The compositions of the primary halo of Nannihu ore field are Sn,W,Mo,F,Cu,Zn,Pb,Ag.According to the horizontal zoning,it can be devi...