Türkiye Jeoloji Bülteni

Mineralogical and Geochemical Features ofAu, Ag, Pb, Zn Mineralizations in Keban (Elazığ) Wastes

Abstract: The studied area is located in Keban township of Elazığ and two geological units are present in the area. These are from oldest to youngest;Keban Metaporphites (Permo-Carboniferous) and Keban magmatic rocks (Upper-Carbo-niferous).The Keban Metamorphics consist of calcshist, sericite chlorite schist, porous limestone, laminated limestone, bedded crystallized limestone,massive crystalized limestone olistolites.Keban magmatic rocks are occured alkaline siyenite, quartz siyenite, monzonite and quartz monzonite and intruded in to the KebanMetamorphics as dikes and sills.Although some minor variations major ore minerals are pirolusite, rodokrosite, barite, pyrite, galena, sphalerite, chalcopyrite, arsenopyrite, Ag-As-Sb sulphosalt and minor minerals; siderite, geothite, calcite, quartz, gypsium in different waste.Keban wastes are subdivided in to four main group (West Euphrates, Siftil Tepe, Zeytin Dağı, Derebaca) in Keban area.The samples are evaluated as mineralogically and geochemically. West Euphrate wastes are composed of oxidic ore and therefore showstrong Au-Ag and Au-Zn. Otherwise correlations among Au, Ag, Pb, Zn metals show significant connections between Ag, Pb and Zn of Siftil Tepeand these results match with those of Ag-rich Pb-Zn sulphide mineralizations. The same elements display similar correlations in Zeytin Dağıwastes. Correlation values for the same metals in Derebaca wastes are close to the above two wastes but very low Zn-Ag correlation value.