Types of Hydrothermal Alteration within the Ilovitza Deposit

Abstract

As a result of the recent detailed explorations, Ilovitza deposit is separated to the polymetallic Cu-Au-Mo porphyry deposit, located within Tertiary intrusive complex, whose mineralization is closely related to intensive hydrothermal alterations of surrounding rocks. This deposit represents a part of several porphyry systems in eastern Macedonia and northern Greece, which are in association with igneous complexes and is one of deposits of the type of the deposit Buković–Kadiica in Macedonia and Scouries in Greece. Hydrothermal alterations, as a special marc of the deposit, with our laboratory examinations, were determined as an alteration that characterizes porphyry systems. Between them are distinguished neobiotitization, quartz–sericitization, silicification, argillitization et al one of the most intensive alteration is silicification (around 49 %), which in association with alunitization (around 40%), encompasses the apical parts of intrusive complex.