Noble metal mineralization of Motko and Kuolisma Proterozoic gabbrodolerite intrusions (Karelia)
Abstract
Results of studies of Proterozoic gabbrodolerite intrusions of Motko (2274 ± 3 Ma) and Kuolisma (1960 ± 2 Ma) in Central Karelia are reported. A brief description of their geological structure, degree of differentiation and rock composition is given. It is shown that noble metal mineralization is spatially combined with titanomagnetite horizon and associated with the formation of copper-sulfide mineralization. Platinum group metal minerals are mainly represented by palladium and platinum bismuthotellurids, arsenids and stibioarsenids with kotulskite and sperrylite being dominant. Chalkopyrite, bornite and chlorine-containing (up to 5.5 %) ferrogastingsite are indicator minerals of noble metal mineralization. Ore occurrences can be economically significant after additional appraisal.
About the Authors
V. I. Ivashchenko
Institute of Geology of Karelian Research Centre of the Russian Academy of Sciences (IG KarRC RAS)
Russian Federation
Russian Federation
Candidate of Geological and Mineralogical Sciences, Leading Researcher
K. A. Konevin
ООО «Industriya»
Russian Federation
Russian Federation
Geologist
References
1. Gongal’skiy B. I. Mestorozhdeniya unikal’noy metallogenicheskoy provintsii Severnogo Zabaykal’ya [Deposits of the unique metallogenic province of Northern Transbaikalia]. Moscow, Vserossiyskiy nauchno-issledovatel’skiy institut mineral’nogo syr’ya im. N. M. Fedorovskogo, 2015. 248 p.
2. Ivashchenko V. I., Golubev A. I. Zoloto i platina Karelii: formatsionno-geneticheskie tipy orudeneniya i perspektivy [Gold and platinum of Karelia: formation-genetic types of mineralization and prospects]. Petrozavodsk, Institute of Geology of Karelian Research Centre of the Russian Academy of Sciences, 2011, 369 p.
3. Ivashchenko V. I., Konevin K. A. Metodika i kriterii prognozno-metallogenicheskoy otsenki proterozoyskogo gabbrodoleritovogo magmatizma Karelii na blagorodnometall’noe orudenenie [Methodology and criteria for the prognostic-metallogenic assessment of the Proterozoic gabbrodolerite magmatism of Karelia for noble metal mineralization]. Nauchno-metodicheskie osnovy prognoza, poiskov, otsenki mestorozhdeniy almazov, blagorodnykh i tsvetnykh metallov: Tezisy VIII Mezhdunaradnoy nauchno-prakticheskoy konferentsii. Moscow, Tsentral’nyy nauchno-issledovatel’skiy geologorazvedochnyy institut tsvetnykh i blagorodnykh metallov, 2018, pp. 48. (In Russian).
4. Konevin K. A., Ivashchenko V. I. Noble metal potential of Motko intrusion. Gornyi Zhurnal, 2019, no. 3, pp. 35–38. (In Russian).
5. Korneev A. V., Vikhko A. S., Fatov N. V., Ivashchenko V. I. Viksha deposit – the first large industrially promising PGM locality in Karelia. Gornyi Zhurnal, 2019, no. 3, pp. 31–34. (In Russian).
6. Malashin M. V., Golubev A. I., Ivanikov V. V., Filippov N. B. Geochemistry and petrology of Paleoproterozoic mafic volcanic complexes of Karelian. I. Jatulian trap complex. Vestnik Sankt-Peterburgskogo universiteta. Seriya 7, 2003, no. 1, pp. 3–33. (In Russian).
7. Metallogeniya Karelii [Metalogenia of Karelia]. Petrozavodsk, Institute of Geology of Karelian Research Centre of the Russian Academy of Sciences, 1999, 337 p.
8. Mineralʼnoe syrʼe. Kratkiy spravochnik [Mineral raw materials. Quick reference]. Ed. V. P. Orlov. Moscow, Geoinformmark, 1999, 302 p.
9. Svetov A. P. Platformennyy bazalʼtovyy vulkanizm karelid Karelii [Platform basaltic volcanism of karelide Karelia]. Leningrad, Nauka, 1979, 208 p.
10. Stepanova A. V., Larionov A. N., Larionova Yu. O. 2.2 Ga mafic sills in the central part of the Karelian Craton: U-Pb dating of zircons and geochemistry of gabbro-dolerites in the lake Bolshozero area. Proceedings of the Karelian Research Centre of the Russian Academy of Sciences, 2018, no. 11, pp. 3–16. DOI: 10.17076/geo781 (In Russian).
11. Trofimov N. N., Golubev A. I. Pudoggorskoe blagorodnometalʼnoe titanomagnetitovoe mestorogdenie [Pudozhgorsk precious metal titanomagnetite deposit]. Petrozavodsk, Institute of Geology of Karelian Research Centre of the Russian Academy of Sciences, 2008, 123 p.
12. Filippov N. B., Trofimov N. N., Golubev А. I., Sergeyev S. А., Huhma H. Isotopic age data on the Koikary-Svyatnavolok and Pudozhgora sheeted intrusions. Geology and Useful Minerals of Karelia. Petrozavodsk, Institute of Geology of Karelian Research Centre of the Russian Academy of Sciences, 2007, iss. 10, pp. 49–68. (In Russian).
13. Finanz.ru, available at: https://www.finanz.ru/novosti/birzhevyye-tovary/rossiya-vzorvala-mirovoy-rynok-palladiya-1028042423 (accessed: 22.03.2019).
14. Lepage L. D. ILMAT: an excel worksheet for ilmenite-magnetite geothermometry and geobarometry. Computers and Geosciences, 2003, vol. 29 (5), pp. 673–678.
15. O’Driscoll B., González-Jiménez J. M. Petrogenesis of the Platinum-Group Minerals. Reviews in Mineralogy and Geochemistry, 2016, vol. 81, pp. 489–578.
16. The JORC Code: 2012 Edition. Joint Ore Reserves Committee, 2012, available at: http://www.jorc.org/docs/JORC_code_2012.pdf (accessed: 19 July 2018).
Review
For citations:
Ivashchenko V.I., Konevin K.A. Noble metal mineralization of Motko and Kuolisma Proterozoic gabbrodolerite intrusions (Karelia). Regional Geology and Metallogeny. 2020;(84):97–105. (In Russ.)
Views:
4
Email this article 