Özet:

In the Kıbletepe (Araklı, Trabzon) and its surrounding areas at the eastern Black Sea Region, Late Cretaceous volcanic rocks consist of basalt, andesite and their pyroclastics that they are overlain by dacite, rhyolite and their pyroclastics at the basement cutting off by dykes of basalt and andesite. Late Cretaceous aged dacitic and rhyolitic rocks have hyalo-porphyric and spherulitic textures and consist of plagioclase, quartz and hornblende minerals. The Kıbletepe mineralization is observed in the form of stockwork, disseminated and brecciated texture. The main ore minerals are pyrite, sphalerite and chalcopyrite with minor amounts of fahlore, digenite, covellite and malachite. Quartz, calcite and clay minerals are found as gang minerals. Exsolution lamellia texture was developed sphalerite together with chalcopyrite. Sericitization, silicification, clay alteration and lesser amount carbonatization, chloritization, hematization and limonitization are generally observed in the wall rocks around the mineralizations. As clay minerals, illite, kaolenite, chlorite, simectite and less amount of interlayered illite/simectite were determined. As a result, the volcanics in the Kıbletepe reflect similarities to the hydrothermal alteration of the massive sulphide deposits in the eastern Black Sea Region and the ore are developed from hydrothermal fluids related to the eastern Black Sea island arc volcanism.

Anahtar Kelimeler: