Akademik Veri Yönetim Sistemi
GEOTECTONICS, cilt.56, sa.3, ss.361-381, 2022 (SCI-Expanded)
The Horoz granitoid and related felsic sub-volcanics located in the Inner Tauride Belt are key igneous rocks for understanding and investigating the collision and closure orogenic of the Inner Tauride suture of Neo-Tethys. This paper reports a new set of geochemistry, geochronology, and isotope (Pb-S) geochemistry data for the felsic dikes (granite porphyry, granodiorite porphyry, and quartz porphyry) and galena mineralization of Horoz granitoid. These intrusive felsic rocks yield a zircon U-Pb age of 54.74 +/- 0.37 Ma, which crystallized in the early Eocene (Ypresian). The host rocks were examined under two groups and these are dike-type igneous rocks and metamorphic rocks, usually marble in character, cut by these acidic rocks. Rare earth elements (REE) and tectonomagmatic discrimination diagrams of felsic intrusive rocks collected from the surface and drillings indicate that these felsic sub-volcanic samples are formed in the volcanic arc (active continental margin) tectonic environment. The ore formations are severely controlled by pluton, dikes, structure and stratum which are lens, layered and dike-type within the fracture or contact zone of the Horoz granitoid and surrounding rocks. The primary mineralization in the study area consists of sulfide minerals consisting of pyrite, chalcopyrite, sphalerite, especially galena and neodiganite. Secondary mineralization consists of oxidized and carbonated minerals such as anglesite, cerussite, hydrozincite, and limonite together with smithsonite and furthermore Au minerals are located in limonites. This mineralization is accompanied by calcite and quartz. The mineralization is located in the karstic cavities developed due to tectonism and the forties on their edges. Sulphur and lead isotope analyses were performed on the galena mineral in order to determine the origin of the sulphur forming the ore minerals. According to the results of the analysis, delta S-34 values in galena samples vary between 4.7 and 7.00. The values of Pb-206/Pb-204 (the ratio of Pb-206 from U-238 to Pb-204) vary in a quite narrow range (18.998-18.563). The mineralization in Bolkar Mountains is thought to be primarily hydrothermal in origin, the mineralization that make up the mineralization are mainly related to Horoz granitoid, and they take their current position due to the oxidation and sulfurization of sulfide mineralization.