Peer-reviewed articles 17,970 +


Atanas Hikov; Kalin Kouzmanov; Silvia Chavdarova; Milen Stavrev
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
The increased demand for raw materials requires to reassess some deposits that were not of economic interest in the past. Complex of modern geochemical and mineralogical methods (SEM-EDS, LA-ICP-MS, QUEMSCAN) are used to study the ore mineralization in the small scale Pozharevo manganese deposit, Western Srednogorie Zone, Bulgaria. The deposit is formed in the contact zone between Late Cretaceous andesite pyroclastic rocks and overlying volcanogenic-sedimentary rocks. Manganese mineralization forms colloform textures of alternating compositions from manganeserich phases (birnessite, hollandite, pyrolusite etc.), mixed silicon-manganese phases to silicon-rich phases and often brecciates volcanic clasts. In situ LA-ICP-MS study of trace elements shows significant amounts of Cu, Li, As, Sr, Mo, Ba, W, Tl, REE, some of them defined as critical raw materials. QUEMSCAN study demonstrates join deposition of Mn, K and Ba with volcanogenic-sedimentary origin while later pyrolusite probably is hydrothermal. Mineralogical and geochemical characteristics show hydrothermal-sedimentary origin of Mn mineralization but also it has common features with modern deep-sea polymetallic nodules and proposes similar paleogeodinamic environments. Our study shows that the Pozharevo manganese deposit has good potential for prospecting of critical elements.
[1] Alexiev, E., Investigation of phase composition of manganese ores at Pozharevo village, Sofia district, Bulletin de l’Institut de Geologie pres de l’Academie bulgare des Sciences, vol. 4, pp 237-260, 1956. (in Bulgarian with French abstract)
[2] Boccaletti, M., Manetti, P., Peccerillo, A., The Balkanidesas an instance of back-arc thrust belt. Possible relation with the Hellenides, Geological Society, American Bulletin 85, pp 1077-1084, 1974.
[3] Chavdarova, S., Stavrev, M., Hikov, A., Peytcheva, I., New data on the geochemical and mineralogical features of the main manganese- and iron-bearing ore occurrences in the Central Srednogorie Zone, Bulgaria, Geologica Balcanica, vol. 51/issue 2, pp 3-17, 2022.
[4] Dabovski, Ch., Kamenov, B., Vasilev, E., Bairaktarov, I. Upper Cretaceous geology. In: Zagorchev, I., Dabovski, Ch., Nikolov, T. (Eds), Geology of Bulgaria. Volume II. Part 5. Mesozoic Geology, Prof. Marin Drinov Academic Publishing House, Sofia, pp 423-553, 2009. (in Bulgarian, with English summary)
[5] Dimitrov Ts., Kostov, I., On the genesis of manganese ore deposits in Srednogorie, Annuaire de l’universite de Sofia, Faculte de Biologie, Geologie et Geographie, 2 – Geologie, vol. 48, pp 24-61, 1954. (in Bulgarian with English abstract)
[6] Dimitrova, E., Ganeva, N., Jolkicev, N., Milanova, J., Nachev, I., Upper Cretaceous stratigraphy in W. Srednogorie, Geologica Balcanica, vol. 11/issue 1, pp 51-66, 1981.
[7] Dubinin, A., Geochemistry of Rare Earth Elements in the ocean, Lithology and mineral resources, vol. 39, pp 289-307, 2004.
[8] Hein, J., Koschinsky, A., Kuhn, T., Deep-ocean polymetallic nodules as a resource for critical materials, Nature Reviews Earth & Environment, vol. 1, pp 158-169, 2020.
[9] Hikov, A, Stefanova, E., Stoyanova, V., Milakovska, Z., Abramowski, T., Chavdarova, S., Stavrev, M., Peytcheva, I., Genetic types and REE composition of polymetallic nodules from the eastern part of the Clarion–Clipperton Fractures zone, NE Pacific. In: Christie, A. (ed.) Proceedings of the 16th SGA Biennial Meeting, New Zealand, 28-31 March 2022, vol. 1, pp129-132.
[10] Ivanov, Z., Tectonics of Bulgaria, “St. Kliment Ohridski” University Press, Sofia, pp. 332, 2017. (in Bulgarian)
[11] Marinova, R., Grozdev, V., Ivanova, D., Sinnyovsky, D., Petrov, I., Milovanov, P., Popov, A., Explanatory note of the geological map of Bulgaria in scale 1:50 000. Kostibrod map sheet (К-34-47-B), Ministry of Environment and Water, Bulgarian National Geological Survey, Sofia, 40 pp, 2010. (in Bulgarian)
[12] Pirrie, D., Butcher, A.R., Power, M.R., Gottlieb, P., Miller, G.L., Rapid Quantitative Mineral and Phase Analysis Using Automated Scanning Electron Microscopy (QEMSCAN); Potential Applications in Forensic Geoscience. In: Geological Society, London, Special Publication 232, pp 123-136, 2004.
[13] Popov, P., Berza, T., Grubic, A., Ioane, D., Late Cretaceous Apuseni-Banat- Timok-Srednogorie (ABTS) magmatic and metallogenic belt in the Carpathian-Balkan orogen, Geologica Balcanica, vol. 32/issue 2-4, pp 145-163, 2002.
[14] Popov, P., Popov, K., Metallogeny of Bulgaria, BMGK Komers, Sofia, 426 pp, 2022. (in Bulgarian, with English summary)
[15] Vassileff, L., Stanisheva-Vassileva, G., Metallogeny of the Eurasian Copper Belt. Sector Bulgaria, Geologica Balcanica, vol. 11/issue 2, pp 73-87, 1981.
The study was supported by Bulgarian National Science Fund grant KP-06-N34/6.
Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 03 - 09 July, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
03 - 09 July, 2023
geochemistry, manganese, REE, critical elements, Srednogorie Zone

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