Abstarct: Copper mineralization at north of Kahak occurred in 186 Km east of Shahrood, in the Centeral Iran zone and Sabzevar subzone, in Eocene-Oligocene volcano-sedimentary sequence. Lithologically, the host sequence from bottom to top involves Eocene basaltic-andesitic agglomerate and flows, Eocene numulitic limestone, red and grey Eocene-Oligocene sandstones, and Miocene marls, which crop out in the Kahak anticline. Copper mineralization in the area includes: 1) mineralization hosted by volcanic rocks, and 2) mineralization hosted by clastic sedimentary rocks. The volcanic-hosted copper mineralization occurred as stratabound within Eocene volcanic units at southern limb of the Kahak anticline as Zavak copper deposit, and at northern limb of the anticline, as Sardar mannganese ad copper deposit at footwall of the manganese-bearing horizon. Copper mineralization in the Zavak deposit occurred as vein-veinlets within the agglomerate units and as disseminated within numulitic limestone, and contain chalcocite, pyrite, chalcopyrite, bornite and magnetite, accompanying with chloritic and sericitic alteration. Copper mineralization at the Sardar Mn and Cu deposit occurred as quartz-slulfide veins ad disseminations containing bornite, chalcopyrite and pyrite and secondary chalcocite, accompanying with chloritic alteration. These primary mineralization were cross cutted by chalcocite-bearing zeolite veins at the Zavak deposit, and by calcite/ and zeolite-bearing chalcocite or native copper veins and disseminations at the Sardar deposit. It should be noted that manganese mineralization also occurred as laxyered (stratiform) and exhalative at northern limb of the anticline (i.e., the Sardar Mn and Cu deposit) within numulitic limestone, and at the southern limb as disseminations within tuffaceous sandstone above the limestone unit (i.e., the Zavak deposit). Generally, copper mineralization occurred as vein-veinlets and disseminations at footwall of the Mn-rich laxyer at both limbs of the anticline. The sediment-hosted copper mineralization in this area dominantely occurred within the grey and red sandstone units as lenticular (around and within plant fossils aggregations along with laxyering of the host rocks), vein-veinlets and disseminated textures and structures. Ores within the sedimentary rocks contain primary chalcocite and native copper, and secondary malachite, covellite, cuprite, dijenite and iron oxides-hydroxides. Major gangue minerals are quartz, calcite and chlorite. The plant fossil remnants within the ore horizons were the main reductant agents and ore controls in the host sandstones. However, some cross-cuttig chalcocite and native copper vein-veinlets are obserevd within the sandstones. baxsed on geological, geometry of ores, textures and structures, mineralogy and alteration types in the Zavak copper, and Sardar copper and manganese deposits, it is inferred that copper mineralization in the Kahak anticline occurred through four stages: 1) first stage: copper mieralization due to submarine hudrothermal systems at subsea-floor (contemporaneously at footwall of the stratiform and exhalative Mn-rich laxyer), in an extentional intra-rift arc basin within the flows, agglomerates, and numulitic limestone, 2) second stage: basin filling by clastic sediments, and occurring of another copper mineralization phase during burial and early diagenesis processes as lenticular around ad within the plant fossils (Redbed-type copper minneralization), and as vein-veinlets during late diagenesis which caused formation of chalcocite and native copper vein-veinlets within sandstones, and within volcanic rocks (similar to the Manto-, Volcanic-Redbed- and Michigan-type copper deposits), 3) third stage: orogenic event resulted in formation of cross-cutting NW-SE and NE-SW chalcocite-bearing clacite veins in the Sardar copper and manganese deposit and formation of chalcocite-bearing zeolite veins in the Zavak copper deposit, and 4) fourth stage: finally, these mineralizations in the Kahak anticline were oveprinted by weathering and suupergen proceccess.