The conglomerates of Sangestan Formation (Lower Cretaceous)
have been metamorphosed in the vicinity of the leucogranitoid rocks of the
Shir-Kuh batholith and have created the mineral assemblage of garnetepidote-
quartz-calcite-pyrite in the contact halo. Following the contact
metamorphism, hydrothermal alteration (pyrite formation and silicification)
has likely occurred. Based on the trace element contents of the garnets , the
skarn in the contact halo is Cu-Pb-Zn bearing calcic skarn type. The above
mentioned minerals, apparently, indicate that there is a genetic relationship
between intrusion related Cu-mineralization and the skarnification in the
study area.