The Jinchanghe deposit is a concealed mineral deposit located in the northern part of the Baoshan massif in Sanjiang region. The ore bodies occur in the skarn and marbleized limestone of Hetaoping Formation in lamellar and stratoid forms, and are controlled obviously by the NW-trending F2 fault and the NE-trending F10 fault. Four ore-forming stages, i.e., skarn stage, retrograde alteration stage, quartz sulfide stage and carbonate stage, were recognized based on the field relationship and mineral associations. Metallic minerals consist mainly of magnetite,chalcopyrite,pyrrhotite,pyrite,galena and sphalerite,whereas gangue minerals are composed of garnet, pyroxene, pyroxene, epidote, chlorite and ilvaite. With skarn minerals as the study objects and by using electron microprobe technology, the authors investigated the mineralogical characteristics. Electron microprobe analyses show that most of skarn minerals in the Jinchanghe ore deposit are calcium skarn minerals, and the end member of garnet is dominated by andradite, together with minor grossular. The clinopyroxene comprises hedenbergite and diopside. The amphibole in the Jinchanghe deposit includes actinolite, ferroactinolite and grunerite. Ilvaite contains relatively high iron and is commonly associated with magnetite. Skarn minerals are manganoan minerals in small amounts, comprising spessartine, manganoan hedenbergite, manganoan actinolite and manganoan ilvaite. There exists vertical alteration zonation from the depth to the shallow part and horizontal alteration zonation from east to west, varying in order of remote and buried pluton→calcium skarn zone with Fe→calcium skarn zone with Cu→manganoan skarn zone with Pb and Zn→marbleized limestone. The alteration zone of the Jinchanghe ore deposit indicates that there is a higher temperature and oxidation zone in the middle part of the vertical profile and in the east part of the horizontal profile. Compared with zoning models of skarn minerals in polymetallic ore deposits both in China and abroad, it is inferred that the remote magmatic hydrothermal fluid intruded through the cross-cutting zone of the two faults, and the infiltration effect occurred in the surrounding rocks, thus forming the ore bodies. The Jinchanghe ore deposit is therefore considered to be a copper-zinc-iron polymetallic concealed deposit in the distant contact zone.