The magmatic suites in the Sungun area are a part of NW-SE trending Cenozoic magmatic belt of Iran. The Sungun porphyries occur as stocks and dikes ranging in composition from quartz monzo-diorite through quartz monzonite and granodiorite to granite. The stocks are divided into two groups, I and II. The porphyry stock II, hosting the copper ore experienced intense hydro-fracturing, jointing, and faulting. The mineralized porphyry stock II experienced multiple events of intense hydro-fracturing leading to the formation of stockwork-type and anastomozing veinlets and micro-veinlets of quartz, sulfides, carbonates, silicates, and sulfates. The veinlets are thought to have formed in three distinct, although continuous, hydro-fracturing stages. E-type quartz veinlets and micro-veinlets were formed during the early stage. Quartz-sulfide, quartz-moly, chalcopyrite, pyrite, molybdenite, dolomite, calcite, calcite-pyrite, and sericite veinlets and microveinlets were developed during the middle stage. Anhydrite (present gypsum), L-type quartz, chert, and some calcite and calcite-pyrite veinlets and micro-veinlets characterize the late stage of hydro-fracturing processes.