Ore forming environments of epithermal gold mineralization in the Bor metallogenetic zone, Serbia, Yugoslavia

摘要

The Bor metallogenetic zone (BMZ) represents one of the most significant metallogenetic units in the Republic of Serbia and in the Republic of Yugoslavia, concerning the copper deposits. Apart from copper, there are also useful components obtained as a by-product, gold being the most relevant among them. According to geological characteristics, the Bor metallogenetic zone is classified into the first priority zone from the aspect of gold epithermal mineralization. Within morphogenetic types of epithermal gold mineralization of high and low sulphidation, various forms of mineralized space can be noticed, such as stockwork, pillar, lenses or veins. It should be noted that epithermal gold mineralization of high sulphidation in most cases appears together with Cu (+- Pb-Zn) mineralization. Therefore it is very difficult to separate them when appear in copper ore bodies and have to be treated as a whole, from the geological-economic aspect. The spaces with massive sulphide mineralization have approximately oval or elongated shape directed towards NNW - SSE that is controlled by the main supply channels (Coka Kuruga, Coka Marin). The lowest spaces of epithermal mineralization of high sulphidation are represented with breccias and stockwork. The sulphide phase fills in the interstices (Tilva Mika) and represents the breccias matrix. The lowest parts are represented by the systems of sub-parallel veins filled in with sulphides, which probably represents the systems of main supply channels for mineralized hydrothermal solutions. The paper presents the environments of epithermal gold mineralization forming in Bor metallogenetic zone, which can be distinguished according to their origin, morphological characteristics, structural-texture variety and spatial position.