Geochemistry and petrography of hydrothermally altered rocks of the Ryabinovoe ore field (South Yakutia) as the basis for prediction of gold-copper-porphyry ore mineralization

Results of predictive assessment of gold-copper-porphyry mineralization based on combine approach to studying and mapping petrographic and geochemical characteristics of hydrothermally altered rocks within the Ryabinovoe ore field are discussed. It was established that emplacement and subsequent evolution of the Rybinovy alkaline stock were accompanied by the formation of hydrothermal-metasomatic zonation of plutonogenic type. The zonation is represented by haloes of aegirine feldspathitic and gumbeitic alteration within inner parts of the stock and by haloes of skarnification, fenitic and propylitic alteration in near-intrusion space. Main petrochemical and geochemical characteristics (specialization) of both wallrock metasomatite and weakly/moderately hydrothermally altered rock are recognized. It was indicated that gumbeitic alteration haloes in combination with positive multiplicative geochemical anomalies of AuAgCuBi, BaMoPb and AsSbHg composition could be used as main criteria for the prediction of gold-copper-porphyry ore mineralization within the Ryabinovoe ore field. The article provides recommendations on geological exploration within the located prospects.

1. Vetluzhskikh V. G., Kazanskiy V. I., Kochetkov A. Ya., Yanovskiy V. M. Zolotorudnye mestorozhdeniya Tsentral’nogo Aldana [Gold ore deposits of the Central Aldan]. Geology of Ore Deposits, 2002, vol. 44, no. 6, pp. 467–499. (In Russian).

2. Grabezhev A. I., Belgorodskiy E. A. Produktivnye granitoidy i metasomatity medno-porfirovykh mestorozhdeniy (na primere Urala) [Productive granitoids and metasomatites of copper-porphyry deposits (on the example of the Urals)]. Ekaterinburg, Nauka, 1992, 199 p.

3. Dvornik G. P. Seritsit-mikroklinovye metasomatity i zolotoe orudenenie Ryabinovskogo rudnogo polya (Aldanskiy shchit) [Sericite-microcline metasomatites and gold mineralization in Ryabinovsk ore field (Aldan shield)]. Litosfera, 2009, no. 2, pp. 56–66. (In Russian).

4. Dvornik G. P. Raspredelenie zolota i serebra v rudnykh telakh Ryabinovogo i Novogo mestorozhdeniy (Aldanskiy shchit) [Gold and silver content distribution in ore bodies of Ryabinovoe and Novoe deposits (Aldanskiy shield)]. Litosfera, 2011, no. 4, pp. 119–130. (In Russian).

5. Dvornik G. P. Metasomatizm i zolotoe orudenenie kalievykh shchelochnykh massivov (na primere Tsentral’no-Aldanskoy shchelochnoy provintsii) [Metasomatism and gold mineralization of potassium alkaline massifs (on the example of the Central Aldan alkaline province)]. Ekaterinburg, Ural’skiy gosudarstvennyy gornyy universitet, 2014, 329 p.

6. Zharikov V. A., Rusinov V. L., Marakushev A. A., Zarayskiy G. P., Omel’yanenko B. I. et al Metasomatizm i metasomaticheskie porody [Metasomatism and metasomatic rocks]. Moscow, Nauchnyy mir, 1998, 492 p.

7. Zvezdov V. S. Formational environments and forecast criteria for large and giant porphyry copper deposits. Prospect and Protection of Mineral Resources, 2019, no. 4 (73), pp. 4–19. (In Russian).

8. Kazitsyn Yu. V. Metasomatizm gidrotermal’nykh mestorozhdeniy [Metasomatism of hydrothermal deposits]. Leningrad, Nedra, 1972, 145 p.

9. Kovalenker V. A., Myznikov I. K., Kochetkov A. Ya., Naumov V. B. Platinonosnoe zoloto-sul’fidnoe orudenenie Ryabinovogo shchelochnogo massiva (Tsentral’nyy Aldan, Rossiya) [PGE-bearing gold-sulphide mineralization of the Ryabinovy alkaline massif (Central Aldan district, Russia)]. Geology of Ore Deposits, 1996, vol. 38, no. 4, pp. 345–356. (In Russian).

10. Korzhinskiy D. S. Petrologiya Tur’inskikh skarnovykh mestorozhdeniy medi [Petrology of the Turinsky skarn copper deposits]. Moscow, 1948, 148 p.

11. Kochetkov A. Ya. O novom tipe medno-porfirovogo orudeneniya [On a new type of copper-porphyry mineralization]. Doklady Akademii nauk SSSR, 1982, vol. 267, no. 2, pp. 430–432. (In Russian).

12. Kochetkov A. Ya. Molibden-medno-zoloto-porfirovoe mestorozhdenie Ryabinovoe [Molybdenum-copper-gold-porphyry Ryabinovoye deposit]. National Geology, 1993, no. 7, pp. 50–58. (In Russian).

13. Kochetkov A. Ya. Ore potential of alkaline massifs of the Aldan Shield. Ryabinovsky copper-gold-porphyry deposit. Russian Journal of Pacific Geology, 2006, vol. 25, no. 1, pp. 62–73. (In Russian).

14. Kochetkov A. Ya., Pakhomov V. N., Popov A. B. Magmatizm i metasomatizm Ryabinovogo rudonosnogo shchelochnogo massiva (Tsentral’nyy Aldan) [Magmatism and metasomatism of the Ryabinovy ore-bearing alkaline massif (Central Aldan)]. Magmatizm medno-molibdenovykh rudnykh uzlov. Novosibirsk, Nauka, 1989, pp. 79–110. (In Russian).

15. Marin Yu. B. Granitoidnye formatsii malykh i umerennykh glubin [Granitoid formations of shallow and moderate depths]. Leningrad, Leningradskiy gosudarstvennyy institut, 1976, 143 p.

16. Krivtsov A. I., Zvezdov V. S., Migachev I. F., Minina O. V. Medno-porfirovye mestorozhdeniya [Copper-porphyry deposits]. Moscow, Tsentral’nyy nauchno-issledovatel’skiy geologorazvedochnyy institut tsvetnykh i blagorodnykh metallov, 2010, 232 p.

17. Molchanov A. V., Terekhov A. V., Shatov V. V., Petrov O. V., Kukushkin K. A., Kozlov D. S., Shatova N. V. Gold ore districts and ore clusters of the Aldanian metallogenic province. Regional Geology and Metallogeny, 2017, no. 71, pp. 93–111. (In Russian).

18. Pavlova I. G. Medno-porfirovye mestorozhdeniya (Zakonomernosti razmeshcheniya i kriterii prognozirovaniya) [Copper-porphyry deposits (Distribution patterns and forecasting criteria)]. Leningrad, Nedra, 1978, 275 p.

19. Plyushchev E. V., Ushakov O. P., Shatov V. V., Belyaev G. M. Metodika izucheniya gidrotermal’no-metasomaticheskikh obrazovaniy [Methods of studying hydrothermal-metasomatic alterations study]. Leningrad, Nedra, 1981, 262 p.

20. Plyushchev E. V., Shatov V. V. Geokhimiya i rudonosnost’ gidrotermal’no-metasomaticheskikh obrazovaniy [Geochemistry and ore potential of hydrothermal-metasomatic alterations]. Leningrad, Nedra, 1985, 247 p.

21. Plyushchev E. V., Shatov V. V., Kashin S. V. Metallogeniya gidrotermal’no-metasomaticheskikh obrazovaniy [Metallogeny of hydrothermal-metasomatic alterations]. St. Petersburg, A. P. Karpinsky Russian Geological Research Institute, 2012, 559 p.

22. Popov V. S. Geologiya i genezis medno- i molibden-porfirovykh mestorozhdeniy [Geology and genesis of copper- and molybdenum-porphyry deposits]. Moscow, Nauka, 1977, 204 p.

23. Terekhov A. V., Molchanov A. V., Shatova N. V., Belova V. N. Dva tipa rudonosnykh gumbeitov El’konskogo zoloto-uranovorudnogo uzla (Yuzhnaya Yakutiya) [Two types of ore-bearing gumbeites of the Elkon gold-uranium ore cluster (South Yakutia)]. Regional Geology and Metallogeny, 2014, no. 60, pp. 71–86. (In Russian).

24. Ugryumov A. N., Dvornik G. P. Shchelochnye rudonosnye metasomatity Ryabinovogo massiva (Aldanskiy shchit) [Alkaline ore-bearing metasomatites of the Ryabinovy massif (Aldan shield]. Sovetskaya geologiya, 1984, no. 9, pp. 84–94. (In Russian).

25. Shatov V. V., Molchanov A. V., Shatova N. V., Sergeev S. A., Belova V. N., Terekhov A. V., Rad’kov A. V., Solov’ev O. L. Petrografiya, geokhimiya i izotopnoe (U-Pb i Rb-Sr) datirovanie shchelochnykh magmaticheskikh porod Ryabinovogo massiva (Yuzhnaya Yakutiya) [Petrography, geochemistry and isotopic (U-Pb and Rb-Sr) dating of alkaline igneous rocks of the Ryabinovy massif (South Yakutia)]. Regional Geology and Metallogeny, 2012, no. 51, pp. 62–78. (In Russian).

26. Shatova N. V., Skublov S. G., Melnik A. E., Shatov V. V., Molchanov A. V., Terekhov A. V., Sergeev S. A. Geochronology of alkaline magmatic rocks and metasomatites of the Ryabinovy stock (South Yakutia) based on zircon isotopic and geochemical (U-Pb, REE) investigations. Regional Geology and Metallogeny, 2017, no. 69, pp. 33–48. (In Russian).

27. Shatova N. V., Molchanov A. V., Terekhov A. V., Shatov V. V., Petrov O. V., Sergeev S. A., Prasolov E. M., Dvornik G. P., Leont’ev V. I. Ryabinovoe copper-gold-porphyry deposit (Southern Yakutia): geology, noble gases isotope systematics and isotopic (U-Pb, Rb-Sr, Re-Os) dating of wallrock alteration and ore-forming processes. Regional Geology and Metallogeny, 2019, no. 77, pp. 75–97. (In Russian).

28. Shcherban’ I. P. Usloviya obrazovaniya nizkotemperaturnykh okolorudnykh metasomatitov (na primere Altae-Sayanskoy oblasti) [Formation conditions of low-temperature wall-rock metasomatites (on the example of the Altai-Sayan region)]. Novosibirsk, Nauka, 1975, 200 p.

29. John D. A., Ayuso R. A., Barton M. D., Blakely R. J., Bodnar R. J., Dilles J. H., Gray F. et al. Porphyry copper deposit model. Scientific Investigations Report 2010-5070-B, U. S. Geological Survey. Reston, Virginia, 2010, 169 p.

30. Lowell J. D., Guilbert J. M. Lateral and vertical alteration-mineralization zoning in porphyry ore deposits. Economic Geology, 1970, vol. 65, no. 4, pp. 373–408.

31. Muller D., Groves D. I. Potassic igneous rocks and associated gold-copper mineralization. Springer International Publishing, the 4th Edition, 2016, 311 p.

32. Shatov V. V. Petrology and geochemistry of hydrothermal alteration related to the Kuvsky granitic pluton, Central Kazakhstan. In Shatov, V., Seltmann, R., Kremenetsky, A., Lehmann, B., Popov, V., Ermolov, P. (eds.): Granite-related ore deposits of Central Kazakhstan and Adjacent Areas, St. Petersburg, Glagol, 1996, pp. 315–336.

33. Shatov V. V. Alteration-mineralization model for

34. Cu-Mo porphyry system of the Bozshakol deposit, Central Kazakhstan. In Stanley, C. J. et al. (eds.): Mineral deposits: processes to processing, Rotterdam, A. A. Balkema, 1999, vol. 1, pp. 437–440.

35. Shatov V. V., Moon C. J., Seltmann R. Discrimination between volcanic associated massive sulphide and porphyry mineralization using a combination of quantitative petrographic and rock geochemical data: A case study from the Yubileinoe Cu-Au deposit, western Kazakhstan. Journal of Geochemical Exploration, 2014, vol. 147, pt. A, pp. 26–36.

36. Sillitoe R. H. Porphyry copper systems. Economic Geology, 2010, vol. 105, pp. 3–45.

37. Sinclair W. D. Porphyry deposits. In Goodfellow, W. D. (ed.): Mineral deposits of Canada, Geological Association of Canada, Special Publication, 2007, no. 5, pp. 223–243.