Institute of Mining, Far Eastern Branch of the Russian Academy of Sciences (Khabarovsk, Russia):

Kryukov V. G., Leading Researcher, Candidate of Engineering Sciences, kryukov-vg@mail.ru
Litvinova N. M., Leading Researcher, Candidate of Engineering Sciences, nauka22@yandex.ru
Lavrik N. A., Senior Researcher, lavrik@igd.khv.ru
Stepanova V. F., Engineer-mineralogist, goscha@yandex.ru

The purpose of the studies consisted in development of a methodological approach for assessment of multimetal ores’ precious metals mineralization and exposure of rebellious ore-processing factors. Through the example of the Southern Khingan ore zone (the Poperechnoye deposit) ferromanganesian mineralization, a preliminary mineralogical-geochemical and geological estimation of the core material was performed with individualization of the different ore types. Thereupon, small technological samples were formed, precious metals mineral fractions were separated, chemico-analytical quantity determinations of finely dispersed particles were accomplished, mineral intergrowths were subjected to ultrasonic treatment, composition and structure of precious metals mineralizations were described in detail. Mineable platinum and gold grades were established as a result of the studies of the core samples from the drillholes bored in the deposit central area. Three ore types were distinguished: 1) manganese quartz-braunite with hematite and magnetite, 2) carbonatemagnetite iron ores with hematite, 3) pyrite ores with carbon minerals. Each ore type is characterized by a certain combination of ore and gangue minerals. The revealed precious metals mineralization is associated with all three ore types. According to the shortened mineralogical analysis data, a sufficiently high platinum grade is noted in carbonate-magnetite and quartz-braunite ore types, and that of gold — in ferruginous quartzites. The revealed characteristic properties of the Southern Khingan ore cluster Poperechnoye deposit are distinctive for the Kimkanskoye, Sutarskoye and other deposits of this region. The ores in question are similar to the iron ores deposits of the Tuguro-Chumikansk region and also a number of the iron ore formations located in Primorye and Yakutia. Consequently, the proposed methodology may be applied with respect to the above iron ore deposits and formations.

1. Saksin B. G., Nevstruev V. G., Usikov V. I. Current state of the art of exploration of endogenic deposits of noble metals in the Lesser Khingan Range in the Far East of Russia. Tikhookeanskaya Geologiya. 2015. Vol. 34, No. 1. pp. 72–79.
2. Zhirnov A. M. On the issue of the complex use of iron ore of the Kimkano-Kostengin ore site and the South-Khingan manganese-iron ore field in the Jewish Autonomous Region. Gorny Informatsionno-Analiticheskiy Byulleten (nauchnoteknicheskii zhurnal). 2009. Vol. 5, No. 12. pp. 115–120.
3. Zhirnov A. M., Goroshko M. V., Moiseenko N. V. The South-Khingan gold-iron ore giant in the proterozoic graben of the Burean craton (Russian Far East). Vestnik Severo-Vostochnogo Nauchnogo Tsentra DVO RAN. 2012. No. 2. pp. 2–10.
4. Saksin B. G., Malovitskaya N. L., Borisenko S. S. The deep structure of the Khingano-Olonoi region and the connection of tin mineralization with it. Tikhookeanskaya Geologiya. 1989. No. 2. pp. 52–57.
5. Nevstruev V. G., Berdnikov N. V., Saksin B. G., Usikov V. I. Carbonaceous rock-hosted precious metal mineralization at the Poperechnoye iron-manganese deposit (Malyi Khingan, Russia). Tikhookeanskaya Geologiya. 2015. Vol. 34, No. 6. pp. 102–111.
6. Khanchuk A. I., Rasskazov I. Y., Aleksandrova T. N., Komarova V. S. Natural and technological typomorphic associations of trace elements in carbonaceous rocks of the Kimkan noble metal occurrence, Far East. Tikhookeanskaya Geologiya. 2012. Vol. 31, No. 5. pp. 3–12.
7. Aleksandrova T. N., Cherepanov A. A., Berdnikov N. V. Results of mineralogical and technological study of noble metal mineralization of carbonaceous rocks of the Sutyrskaya and Kimkanskaya sequences of the Bureya Massif. Problems of geo-resources complex development. Materials of the IV All-Russian Scientific Conference. Khabarovsk: Publ. IGD DVO RAN, 2011. Vol. 1. pp. 229–234.
8. Cherepanov A. A., Berdnikov N. V. Noble metals in carbonaceous rocks of the eastern part of the Bureya Massif: new data. Tectonics, deep structure and mineralogy of East Asia. Materials of the All-Russian Conference. Vladivostok: Dalnauka, 2013. pp. 339–341.
9. Cherepanov A. A., Berdnikov N. V. Mineralogical and geochemical properties of graphite and precious metal mineralization of the Soyuznoe deposit. Tikhookeanskaya Geologiya. 2013. Vol. 32, No. 4. pp. 80–87.
10. Cherepanov A. A., Berdnikov N. V., Gaidashev V. V. The impact of different methods of test preparation on analytical results of determination of precious metal concentrations in carbonaceous rocks of the Bureya Massif, Russian Far East. Tikhookeanskaya Geologiya. 2015. Vol. 34, No. 4. pp. 79–85.
11. Khanchuk A. I., Plyusnina L. P., Ruslan A. V., Likhoidov G. G., Barinov N. N. Nature of graphitization and noble metal mineralization in metamorphic rocks of the northern Khanka Terrane, Primorye. Geologiya Rudnykh Mestorozhdeniy. 2013. Vol. 55, No. 4. pp. 261–281.
12. Vasilyeva I. E., Pozhidaev Yu. N., Vlasova N. N., Voronkov M. G., Philipchenko Yu. A. Sorption-atomicemission determination of gold, platinum and palladium in rocks and ores using sorbent PSTM-3Т. Analitika i Kontrol. 2010. Vol. 14, No. 1. pp. 16–24.
13. Zolotov Yu. A., Varshal G. M., Ivanov V. M. (eds). Analytical chemistry of platinum group metals. Moscow: Editorial URSS, 2003. 592 p.
14. Lupu R., Nat A., Ene A. Determination of gold in Romanian auriferous alluvial sands and rocks by 14 MeV neutron activation analysis. Nuclear Instruments and Methods in Physics Research. 2004. Vol. 217, No. 1. pp. 123–135.
15. Cook N. J., Ciobanu C. L., Mao J. Textural control on gold distribution in As-free pyrite from the Dongping, Huangtuliang and Hougou gold deposits, North China Craton (Hebei Province, China). Chemical Geology. 2009. Vol. 264, Iss. 1–4. pp. 101–121.
16. Zang W., Fyfe W. S., Barneti R. L. А silver-раlladium alloy from the Bahia lateritic gold deposit, Carajas, Brasil. Miner. Mag. 1992. Vol. 56, No. 1. pp. 47–51.
17. Martynyuk M. V., Ryamov S. A., Kondratyeva V. A. Explanatory note to the scheme of dismemberment and correlation of the Khabarovsk Territory and the Amur Region igneous complexes. Khabarovsk, 1990. 215 p.
18. Kryukov V. G. Genetic features of Maly Khingan ancient deposits. Questions of geology and complex development of East Asia natural resources. Collected papers of the 3^rd All-Russian Scientific Conference. In 2 vols. Blagoveshchensk: Publ. IGiP DVO RAN, 2014. Vol. 1. pp. 111–115.
19. Khanchuk A. I., Rasskazov I. Yu., Kryukov V. G., Litvinova N. M., Saksin B. G. On the discovery of industrial platinum in the ores of the South Khingan manganese deposit. Doklady Akademii Nauk. 2016. Vol. 470, No. 6. pp. 701–703.
20. Nevstruyev V. G., Litvinova N. M., Berdnikov N. V., Stepanova V. F. Typomorphism and genesis of PGE in rocks and ores of iron-manganese deposit Poperechnoye (Maly Khingan, Russia). Gorny Informatsionno-Analiticheskiy Byulleten (nauchno-teknicheskii zhurnal). 2016. No. S21. pp. 486–492.
21. Kun L., Ruidong Y., Wepyong Ch. et al. Trase elements and REE geochemistry of the Zhewang gold deposit, southeastern Gaizhou Province, China. Chin. J. Geochem. 2014. Vol. 33. pp. 109–118.