Affiliation:
1. Department of Geological Engineering Konya Technical University Konya 42250 Turkey
Abstract
AbstractThe Goshgarchay Cu‐Au deposit is located in the central part of the northwest flank of the Murovdagh region in the Lesser Caucasus. The Goshgarchay Cu‐Au deposit is associated with Middle Jurassic volcanic and Late Jurassic–Early Cretaceous high‐K calc‐alkaline intrusive rocks. The Cu‐Au mineralization is commonly related to quartz‐sericite‐chlorite alteration dominantly composed of chalcopyrite, gold, sphalerite, pyrite, bornite, hematite, covellite, chalcocite, malachite, and azurite. The Goshgarchay copper‐gold deposit, which is 600 m wide and approximately 1.2 km long, is seen as a fault‐controlled and vein‐, stockwork– and disseminated type deposit. The Goshgarchay Cu‐Au deposit predominantly comprises Cu (max. 64500 ppm) and Au (max. 11.3 ppm), while it comprises relatively less amounts Zn (max. 437 ppm), Mo (max. 47.5 ppm), Pb (max. 134 ppm), and Ag (max. 21 ppm). The homogenization temperatures and salinities of fluid inclusions in quartz for stage I range from 380°C to 327°C, and 6.9 wt% to 2.6 wt% NaCl eq., respectively. Th and salinities in quartz for stage II range from 304°C to 253°C, and 7.6 wt% to 3.2 wt% NaCl eq., respectively. The calculated δ34Sh2s values (–1.5‰ to 5.5‰) of sulfides and especially the narrow range of δ34Sh2s values of chalcopyrite and bornite (between –0.07‰ and +0.7‰) indicate that the source of the Goshgarchay Cu‐Au mineralization is magmatic. Based on the mineralogical, geochemical, fluid inclusion, and sulfur isotopic data, the Goshgarchay Cu‐Au deposit represents a late stage peripheral magmatic‐hydrothermal mineralization probably underlain by a concealed porphyry deposit.
Reference82 articles.
1. Tectonics and geological history of Abkhazia;Adamia S.;Proceedings of Geological Institute of Academy of Sciences of Georgia,1977
2. Geology of the Caucasus: A Review;Adamia S.;Turkish Journal of Earth Sciences,2011
3. Agakishiyev A. Chalabi H. Isazadeh A. Gadimov S. Akbarov M. andAlasgarov R. 2004.Report on work results on gold-bearing assessment of Gedabek copper-pyrite deposit for the period of 1992–2002 years. Baku:6–9.
4. Alimammadov N. 2021.Geological mineralogical petrographical and geochemical properties of the Goshgarchay (West Azerbaijan) porphyry copper deposit (M.Sc. thesis). Konya Technical University 1–55.