سنگ‎نگاری، کانی‎نگاری و تغییرات مقادیر ‏‎65Cu‏ در پهنه های فروشست، برون‎زاد و درون‎زاد ‏کانسارهای مس پورفیری دره‎زار و پرکام، استان کرمان، جنوب ایران

The darrehzar and parkam deposits in kerman province are two examples of porphyry type copper deposits in the cenozoic urumieh- ‎dokhtar magmatic arc. volcanic rocks in the study areas are dominantly composed of andesite, trachyandesite and basalt. the darrehzar ‎quartzmonzonite stock consists of phenocrysts of plagioclase, hornblend, quartz and biotite, andconstituent minerals of diorite-microdiorite ‎porphyry in parkam include plagioclase, alkali-feldspar, amphibol, biotite and quartz. the thickness of oxide zone in darrehzar deposit is ‎few meters and in many well cores it cannot be obsereved at all, while the the thickness of leached zone varies between 2 and 80 m. ‎supergene zone in the center of this deposit has the greatest thickness (120 m). the depth of hypogene zone from darrehzar is 400 m. the ‎thickness of leached zone from parkam is around 20 m. the average thickness of supergene zone in this deposit is 15 m and its maximu ‎depth is 64 m. the depth of hypogene zone in some cores is around 500 m. evalutating the cu isotope ratios from leached, supergene and ‎hypogene zones in these two deposits show that the magnitude of cu isotopic fractionation and cu concentrations are mainly controlled by ‎the weathering processes. the average ?65cu values of copper in the leached, supergene and hypogene zones in darrehzar deposit are, ‎respectively, -6.16‰, +2.52‰ and +0.79‰, and those in the parkam are -4.33‰, +4.82‰ and +0.34‰. therefore, weathering of cu sulfide ‎minerals generated isotopically lighter residual minerals and dispersed the‏ ‏heavy isotope to the percolating groundwaters. it is thus expected ‎that the copper isotope ratios of the leached zones in various porphyry copper deposits to be linked with the extent of leaching and the ‎supergene enrichment processes. microscopic studies and mineralogical studies shows that hematite in the darrehzar’s leached zone in more ‎abundant than that in the parkam, while parkam’s leached zone contain higher goethite content relative to that of the darrehzar. the amount ‎of chalcosite, and pyrite–chalcopyrite in the supergene and hypogene zones, respetively, from darrehzar, are more abundant compared to ‎those in the equivalent zones in parkam. ‎