The characteristics of structural superimposed halo and blind ore forecast of Nandawa Ore Belt in Jinchanshan Gold Mine, Inner Mongolia

To evaluate the deep exploration target area of Nandawa Ore Belt in Jinchanshan Gold Mine, the paper is conducted on the structural superimposed halo characteristics of the ore belt through sample collection, testing and analysis, combined with the geological conditions of the mining area. The research results indicate that the anomalous zoning of axial elements in the primary halo of Nandawa Ore Belt exhibits a phenomenon of “reverse zoning”. The elements in the front edge halo of the ore body are Hg, As, Sb, F, Ba, B; The elements near the ore halo are Au, Cu, Ag, Pb, Zn. The elements in the tail halo are Mo, Bi, Mn, Co, Ni, W. The superimposed halo model of the ore body structure shows that the ore body is arranged in a “lotus root” shape, and independent ore bodies can be seen from top to bottom with front edge halos, near ore halos, and tail halos showing normal elemental anomaly shapes. According to the blind ore forecast, the superimposed halo model predicts that there are three prospecting target areas in the deep part of the II-5 ore body and one target area in the deep part of the VI ore body. The preliminary verification of the new mining site has achieved good prospecting results, providing a basis and effective prospecting methods for deep ore exploration and storage enhancement in the mine.