Hydrothermal mineralization and alteration in the Ilovica Cu-Au porphyry deposit, Eastern Macedonia

As a result of the latest detailed studies carried out by the Phelps Dodge company and continued by the Euromax company, the Ilovitsa deposit has been classified as a Cu-Au porphyry deposit. The Ilovitsa deposit represents one of the most significant porphyry Cu-Au deposits located within the Tertiary intrusive complex, which has undergone intense hydrothermal alteration, typical for porphyry systems. The following types of alteration are distinguished within the deposit: weak propylitic alteration, advanced argillic alteration, quartz-sericite-pyrite (“phyllic”) alteration and potassic metasomatism with the presence of intermediate argillic alteration, and supergene sulphide alteration.