Abstract: The Shiziling granite-type tungsten-tin deposit is one of the four core deposits in the Limu mining field of the Nanling mineralization belt in the western section. It is a typical concealed gran⁃ ite-type tungsten-tin deposit. To study the geological characteristics of the tungsten-tin deposit and pro⁃ vide certain assistance for prospecting prediction，through systematic drilling engineering documentation， microscopic identification of rocks and minerals，geochemical testing，in-situ micro-area analysis，and spatial coupling analysis of structure-weathering-mineralization，a vertical five-level alteration-mineral⁃ ization zoning sequence of the Shiziling deposit was systematically established. The mineralization types and element differentiation laws from the deep part to the shallow part of the deposit were clarified，and the main controlling factors of the spatial distribution of the ore body were identified. The F，Li jetting ha⁃ lo，Lepidolite-Fluorite vein zone were determined as direct prospecting indicators for the mining area，and a tripartite comprehensive prospecting model of "rock body top convex structure + alteration zoning + geo⁃ chemical anomaly" was constructed. The top convex area of the concealed rock body and its periphery，as well as the intersection area of fault structures，were identified as the core favorable target areas for miner⁃ al exploration，providing theoretical basis and exploration guidance for the prospecting breakthrough of similar concealed deposits in the deep part and periphery of the mining field.

Key words: tungsten-tin polymetallic deposit, orebody occurrence characteristics, prospecting predic? tion