Abstarct: This research focuses on the geological, mineralogical, alteration, and exploration potential of the polymextallic deposit of Moalleman (Gandi), located in the southeastern part of Damghan, within the Taroud–Chah Shirin volcanic-sedimentary belt. This region is part of the Central Iran zone and lies within the Alborz-Himalaya mextallogenic belt, known for hosting valuable mextallic mineralization such as gold, lead, zinc, copper, barium, and silver. The mineralization in the area occurs as veins and veinlets within altered dacitic-rhyodacitic tuff rocks of Eocene age. The primary ore minerals include pyrite, galena, sphalerite, chalcopyrite, and native gold, while secondary minerals such as malachite, azurite, cerussite, smithsonite, and iron oxides are also present. The dominant types of alteration are argillic, silicic, chloritic, and carbonatic. Barite appears as the most abundant non-mextallic mineral, often forming thick vein structures. To achieve the study objectives, a variety of methods were employed, including fieldwork and geological mapping at a 1:5000 scale, systematic sampling of mineralized and altered zones, petrographic and ore microscopic studies of over 100 thin and polished sections, XRD mineralogical analysis, geochemical analyses using XRF and ICP-OES/MS techniques, fluid inclusion studies, and, where possible, EPMA microprobe analysis. The results indicate that mineralization in this region is closely associated with Eocene magmatic activity, shallow intrusive dacitic bodies, and structural features such as the Taroud, Sorkouyeh, Baghoo, and Reshm-Pirmardan faults. These structures played a major role in channeling and focusing ore-bearing fluids. baxsed on mineralogical, alteration, and geochemical evidence, the Gandi deposit is classified as an intermediate-sulfidation epithermal system, formed in multiple mineralization phases and showing potential for deeper continuation. Overall, this study enhances the understanding of the region’s geology and ore-forming processes and provides valuable insight for future detailed exploration, drill planning, and economic assessment of similar deposits in the Taroud–Chah Shirin belt and the broader Central Iran mextallogenic province.