Metallogenic Characteristics, Prospecting Prediction and Exploration Methods Combination of Fengtai Pb−Zn Orefield, West Qinling

Based on the understanding that the occurrence of Pb−Zn ore bodies in Fengtai orefield of west Qinling is dominated by anticline structure, strata and specific lithologic horizon, and that the main Pb−Zn deposit exhibit a certain inclination with the ore−controlling anticline, the metallogenic characteristics of Pb−Zn deposits are from outcrop to completely concealed, based on the study on metallogenic model and prospecting criteria of Pb−Zn deposits in the region, the favorable areas for Pb−Zn ore prospecting can be divided into three types: the extension part of the known orebodies, the unknown orebodies in the deep part (or its periphery) of the known orebodies, and the new area without the known ore deposit.Through the work, four prospecting target areas are predicted: in the deep part of the Bafangshan−Erlihe Pb−Zn deposit, the Baiyanggou−Donggou Pb−Zn belt, the deep part of the Yindongliang−Shoubanya Pb−Zn deposit and the deep part of the Qiandongshan−Dongtangzi Pb−Zn deposit. The prediction of prospecting target is focused on the stretch and dip of known Pb−Zn deposits in the four prospecting target areas, and the fold of two deep flanks of the deposits. The practice of prospecting in recent years has proved that, comprehensive geological research, structural superimposed halo prospecting, wide−area electromagnetic prospecting and verification of deep prospecting engineering are the effective exploration methods and techniques combination for deep Pb−Zn deposits in this ore−concentrated area.