Iron oxide copper gold ore deposits to be within Neoproterozoic to Mesoproterozoic basement. Worldwide, ages of recognised IOCG deposits range from 1.8 Ga to 15 Ma, however, the majority are within the 1.6 Ga to 850 Ma range. Ore minerals in IOCG deposits are typically copper-iron sulfide chalcopyrite and gangue pyrite, forming 10–15% of the rock mass. Supergene profiles can be developed above weathered examples of IOCG deposits, as exemplified by the Sossego deposit, Para State, Brazil, where typical oxidised copper minerals are present, e.g.; malachite, cuprite, native copper and minor amounts of digenite and chalcocite. Alteration is a mixture of sodic-calcic (albite-epidote) to potassic (K-feldspar)
Rampura Agucha to have occurred approximately 1 billion years ago. There are a few sulphides and oxide minerals that form within the ore that are a particular interest, the major one being sphalerite. Galena, pyrite, pyrrhotite, and marcasite commonly occur with the sphalerite along with some minor arsenopyrite and chalcopyrite. Gahnite and rutile are the most common oxide minerals that form within the ore, with rutile being the most abundant. Graphite is also a mineral that is commonly found within the ore and surrounding rock. Extracted deposits through drilling, blasting, and underground mining methods are loaded and taken to be processed while