Abstarct: Kuhe Rig iron-celestite deposit is located in 130Km south of Shahrood and 17 Km south of Toroud, in the northern part of the central Iran zone and in the Sabzevar subzone. Mineralization occurred in the Eocene volcano-sedimentary sequence dominated by andesite basalt, basalt and crystal lithic tuffs. In this deposit, three hydrothermal facies are observed: 1)Vein-veinlets facies, hosted by andesite-basalt: consisting hydrothermal calcite-barite-quartz- and quartz veins, 2) Breccia facies, hosted by volcaniac breccia: in which angular volcanic pieces are surround by goethite and hematite, and 3) banded facies, hosted by fine grain tuff, which involves alternations of ore-bearing bands and concordant with crystal lithic tuff bands. Other than the hydrothermal veins, there are also diagenetic calcite-manganese oxide veins cross-cutting the former veins, and deformation calcite-(manganese) joint-filling veins. The main structure and texture of the deposit consists of bandded-laminated, brecciated, and colloform and disseminated textures. baxsed on petrographic, X-ray diffraction (XRD), and Electron probe (EPMA) studies, the main minerals in the deposit consist of hematite, magnetite, celestite, pyrolusite, psilomelane, goethite, and gypsum. The initial hydrothermal alteration in the zone consists of sericite and chlorite alteration. Of course, the argillic alteration in the sericite zone has also been observed resulting from supergen and weathering processes. baxsed on the chemical analysis through ICP-MS/OES methods, the Kuhe Rig iron-celestite deposit samples plot in the range of hydrothermal deposits according to the Co-Ni-Cu, Co+Ni+Cu-Co/Zn, Mn-Fe-(Ni+Co+Cu)*10 geochemical diagrams, and Co/Zn and Mn/Fe ratios. The volcanic rocks in the (Zr/Y)/(La/Yb), Zr/Yb, Yb/Th digrams have transitional nature, and their Primitive Mantle-normalised spider diagram indicate a continental margin arc setting for their deposition. The fluid inclusion studies on the calsite-barite-quartz- and quartz veins from the stringer zone shows homogenization temperature between 139 and 315 ˚C for calcite and between 129 and 298 ˚C for quartz. The salinity for calcite and quartz range between 2.13 and 12.4, and between 0.6 and 6.47 eq. wt% NaCl, respectively. baxsed on petrography of fluid inclusions, the occurrence of boiling in the mineralization is not observed. The Kuhe Rige Fe-Sr deposit due to the volcano-sedimentary nature of the host rock sequence, laxyered geometry of ore body, structure and textures and mineralogy of ores, ore facies, alteration zones and geochemical features shows many similarities with the volcanic-exhalative iron deposits. It should be noted that high amounts of celestite is of special characters of the mineralization and any similar deposits has not been reported in Iran and the world.