Abstract:  Leapfrog software was usedto constructa 3D geological model of No. 9 orebody in the Sanguikousulfur-zinc polymetallic deposit. Grade interpolation of major ore-forming elements within the orebody was performed, and the results were interpreted in conjunction with geological characteristics and field investigations. The spatial distribution patterns of mineralization were analyzed from 3 aspects: orebody morphology, distribution of ore-forming elements, and characteristic element ratios. The results show that No.9 orebodyis generally tabular in shape, but exhibits significant serrated undulations on the northeastern side. The morphology and thickness variation of the orebody are controlled by an asymmetric syncline structure, while enrichment of lead and zinc is locally governed by secondary anticline-syncline folding. The northeastern part of the deposit is characterized by high w (Zn )/w (Pb) ratios and sulfur enrichment. Combined with tunnel observations indicating strong hydrothermal alteration of dolomitic marble host rocks in this area, it is inferred that although lead-zinc mineralization weakens overall toward the northeast, it does not pinch out rapidly and may still extend a certain distance.