Azerbaijan State University of Oil and Industry, Baku, Azerbaijan

G. S. Guseinov, Associate Professor, Candidate of Geological and Mineralogical Sciences
Z. J. Efendiyeva, Professor, Doctor of Sciences, zarifa.afandiyeva@asoiu.edu.az

The gold content of ores at the Daghkesaman pyrite–polymetallic deposit is considered. Gold is found in the intergrowth of the main late sulfide minerals (sphalerite, galena), and sometimes it is observed inside chalcopyrite. The distribution of noble minerals (Au, Ag) in various mineral associations and monomineral fractions of the main sulfide minerals (sphalerite, galena, chalcopyrite) is also studied. In various types of ores and monomineral fractions of the main late sulfide minerals (sphalerite, galena, chalcopyrite), gold is distributed unevenly. The gold–silver content of wall rocks, various ore types and within different horizons is analyzed. The results show that the Au:Ag ratio steadily increases from low grades to high grades of ore. The increased concentrations of gold and silver in the main late sulfide minerals (sphalerite, galena, chalcopyrite) also confirm the above-said. In addition, it is found that on deep horizons (512 and 400 m, mine 1), with the decrease in the content of noble metals (Au, Ag), the content of nonferrous metals also decreases. The obtained regularities are of great practical importance for assessing the gold content depth-wise a mineral deposit. The Au:Ag ratio is also treated as a geochemical indicator of mineralization. The behavior of the Au: Ag ratio is investigated on the surface, in each of the identified mineral associations, as well as on different hypsometric levels on the horizons of 544 and 512 m.

1. Guseynov G. S., Mobili R. B. Gold content of pyritic ore depоsits in the Loki–Agdam metallogeny zone in the Lesser Caucasus. Baku, 2010. 286 p.
2. Baba-Zade V. M., Musaev Sh. D., Nasibov T. N. Gold of Azerbaijan. Baku, 2003. 423 p.
3. Efendiyeva Z. J., Korol Yu. A., Popova G. I. Rational use of natural resources in Azerbaijan. Tsvetnye Metally. 2018. No. 1. pp. 57–62.
4. De la Nuez Colon D., Santa Cruz Pacheco M. Gold and gold-bearing volcanogenic massive sulphide deposits of the Central Cuba. Izvestiya vuzov. Geologiya i razvedka. 2020. No. 3. pp. 27–37.
5. Mazurov A. K., Nikolaeva A. N., Rudmin M. A., Yakich T. Yu., Ruban A. S. et al. Gold in the ore of the gold-pyrite deposit Abyz (Central Kazakhstan). Bulletin of the Tomsk Polytechnic University. 2021. Vol. 332, No. 11. pp. 78–88.
6. Osmonbetov E. K. Geology and goldness deposits Shambesai. Byulleten nauki i praktiki. 2020. Vol. 6, No. 5. pp. 249–256.
7. Goryachev N. A. Gold Deposits in the Earth’s history. Geology of Ore Deposits. 2019. Vol. 61, No. 6. pp. 495–511.
8. Berman Yu. S., Vashadze B. G., Korinteli G. S. Mineral and geochemical characteristic of gold and silver in the polymetallic ore deposit in Southern Georgia. INIGRI Transactions. Moscow, 1983. Iss. 178. pp. 40–48.
9. Nikolaeva L. A., Badalova R. P. Internal structure of native gold as an example of ore formation conditons. INIGRI Transactions. Moscow, 1970. Iss. 87. pp. 143–153.
10. Lidong D., Heping L., Siyuan W., Junhao W. Geochemical characteristics of gold polymetallic deposits as exemplified by the Laozuoshan Deposit, Heilongjiang, China. Chinese Journal of Geochemistry. 2003. Vol. 22, No. 1. pp. 89–96.
11. Efendiyeva Z. J., Osmanov M. B. The reworking of the Kedabek coper gold pyrite deposit by opencast method. Gornyi Zhurnal. 2012. No. 4. pp. 36–37.
12. Yang Z., Hu G., Zhao X. New 40Ar/39Ar data of gold mineralization in the Ailaoshan Gold Belt, Yunnan Province, China. Acta Geologica Sinica. 2020. Vol. 94, Iss. 1. pp. 210–211.
13. Mineral resources of Azerbaijan. Baku : Ozan, 2005. 807 p.
14. Geology of Azerbaijan. Baku : Nafta Press, 2003. Vol. VI. Minerals. 576 p.
15. Kerimov G. I., Baba-zade V. M., Efendiev B. N. Mineralogy of Daghkesaman gold–polymetallic ore deposit. Uchenye zapiski Azerbaydzhanskogo gosudarstvennogo universiteta. Seriya geologo-geograficheskikh nauk. 1972. No. 1. pp. 20–27.
16. Kalandarov B. G. Gold and silver content of polymetallic ore formations in the Lesser Caucasus. Vestnik Bakinskogo universiteta. 2004. No. 4. pp. 90–106.
17. Vikentev I. V., Moloshag V. P., Yudovskaya M. A. Speciation of noble metals and conditions of their concentration in massive sulfide ores of the Urals. Geology of Ore Deposits. 2006. Vol. 48, No. 2. pp. 77–107.
18. Aprelkov S. E., Kharchenko Yu. I. Gold–polymetallic and gold–silver ore manifestations in the south of the Kamchatka Peninsula. Geology of Ore Deposits. 1968. Vol. 10, No. 5. pp. 22–25.
19. Taylor R. D., Monecke T., Reynolds T. J., Monecke J. Paragenesis of an orogenic gold deposit: new insights on mineralizing processes at the Grass Valley District, California. Economic Geology. 2021. Vol. 116, No. 2. pp. 323–356.
20. Groves D. I., Santosh M., Zhang L. A scale-integrated exploration model for orogenic gold deposits based on a mineral system approach. Geoscience Frontiers. 2020. Vol. 11, No. 3. pp. 719–738.
21. Zaw K. Tectonic and metallogenic significance of orogenic gold deposits in Mainland SE Asia. Annual Meeting of Society of Resource Geology. Tokyo, 2019. pp. 14–23.
22. Petrella L., Thébaud N., Fougerouse D., Evans K., Quadir Z. et al. Colloidal gold transport: a key to high-grade gold mineralization? Mineralium Deposita. 2020. Vol. 55, Iss. 7. pp. 1247–1254.
23. Guseynov G. S. Distribution of gold and silver in Dagkesaman gold-polymetallic deposit (Lesser Caucasus). Otechestvennaya geologiya. 2015. No. 1. pp. 24–29.