The vertical variation of trace elements and its applications to metallogenic prognosis in the Shuangwang gold deposit, Shaanxi Province

Abstract: The Fengtai ore concentration area is an important Pb-Zn-Au metallogenic area in the Qinling Mountains, and the Shuangwang gold deposit is a representative large-sized deposit of auriferous albite breccias type in this area. Based on Gregorian’s zoning index method, the authors studied the vertical zoning characteristics of primary halos at the depth of drill holes ZK18-5, ZK30-1, and ZK40-5 in orebodies KT9 and KT8. By discussing the vertical variation of the zoning rate of primary halos, the graphical method of 3-end-mumber diagram, and the vertical change rules of the geochemical parameter, the authors hold that the orebody indicated by ZK18-5 thins out gradually at the depth, with a higher degree of mineralization at the elevation of 950 m; bead-shaped orebodies may occur at the depth of ZK30-1, with a higher degree of mineralization at the elevation of 980 m; the ore body indicated by ZK40-5 with a higher degree of mineralization at the elevation of 850 m still extends to the depth without pinching out.