Journals →  Eurasian Mining →  2022 →  #2 →  Back

ArticleName Promising geotechnologies for gold placer mining in Eastern Transbaikalia
DOI 10.17580/em.2022.02.08
ArticleAuthor Sekisov A. G., Panov Yu. P., Bryukhovetskiy O. S., Rasskazova A. V.

Institute of Mining, Far Eastern Branch, Russian Academy of Sciences, Khabarovsk, Russia1 ; Transbaikal State University, Chita, Russia2:

Sekisov A. G.1,2, Deputy Director, Chief Researcher, Doctor of Engineering Sciences


Sergo Ordzhonikidze Russian State Geological Exploration University, Moscow, Russia:
Panov Yu. P., Acting Rector
Bryukhovetskiy O. S., Professor, Doctor of Engineering Sciences,

Institute of Mining, Far Eastern Branch, Russian Academy of Sciences, Khabarovsk, Russia
Rasskazova A. V., Leading Researcher, Candidate of Engineering Sciences


The Transbaikal Region holds a large stockpile of gold reserves in placers. Gold placers differ in structural tectonics, morphology and parameters of productive strata, their specific mineralogical and geochemical composition, grain-size composition and shape of gold grains, roundness and fineness of gold particles, etc. The drop in the gold content and thickness of productive sand at placers being currently mined necessitates studying refractory gold, including encapsulated, dispersed and chemically bound gold. This article discusses new patent-protected methods for identifying nanoscale gold. New geotechnologies for gold extraction from placer sands using solutions with active chloride complexes pumped into productive formations via wells are presented. Alongside with pumping out pregnant solutions, it is proposed to use the electro-diffusion deposition of dissolved gold from a conventionally immobilized pore solution onto ion-exchange resins placed together with submersible cathodes in wells.

The authors express their gratitude to Professors A. I. Trubachev, V. S. Salikhov, Yu. I. Rubtsov and Cand.Eng.Sci. Yu. S. Shevchenko from the Chita Division of the Institute of Mining, SB RAS, and to Cand.Eng. Sci. N. V. Zykov, Director of the Transbaikalia Mining College, for their help in the pilot trials of the electro-diffusion leaching technology. The studies were carried out using the scientific lab equipment and instruments of the Center for Processing and Storage of Scientific Data of the Far Eastern Branch of the Russian Academy of Sciences, supported by the Ministry of Science and Higher Education of Russia under Agreement No. 075-15-2021-663. The production research and chemical analyses were implemented at the Center of Mineralogical Research of the Khabarovsk Research Center, Far Eastern Branch of RAS.

keywords Gold alluvial deposits, chloride–hypochlorite leaching, well (borehole) geotechnology

1. Savichev A. A., Nevolko P. A., Kolpakov V. V. et al. Typomorphic features of placer gold from the Bystrinsky ore field with Fe-Cu-Au skarn and Mo-Cu-Au porphyry mineralization (Eastern Transbaikalia, Russia). Ore Geology Reviews. 2021. Vol. 129. 103948.
2. Takodjou Wambo J. D., Ganno S., Djonthu Lahe Y. S., et al. Geostatistical and GIS analysis of the spatial variability of alluvial gold content in Ngoura-Colomines area, Eastern Cameroon: Implications for the exploration of primary gold deposit. Journal of African Earth Sciences. 2018. Vol. 142. pp. 138–157.
3. Prokhorov K. V., Kopylov A. A. E. Promising ways to intensify the flotation process of copper-porphyry and gold-silver ores by applying electrochemical processing. Problemy nedropolsovaniya. 2020. No. 2 (25). pp. 96–106.
4. Bryukhovetskiy O. S., Sekisov A. G., Lavrov A. Yu., Rasskazova A. V. Improvement of development efficiency in multi-component refractory gold ore fields using in-situ leaching. Gornyi Zhurnal. 2020. No. 2. pp. 66–69. DOI: 10.17580/gzh.2020.02.09
5. Nenakhova E. V., Sakhno V. G., Kalashnikov Yu. D. et al. Self-assembling of nanodispersed forms of platinoids as a method of their extraction on the example of gold-silver ores of the Milogradovsky mining (Primorsky Region). Proceedings of Voronezh State University. Series: Geology. 2018. No. 4. pp. 103–106.
6. Oparin V. N., Smolyanitsky B. N., Sekisov A. G., Trubachev A. I., Salikhov V. S. et al. Promising mining technologies for gold placers in Transbaikalia. Journal of Mining Science. 2017. Vol. 53, No. 3. pp. 489–496.
7. Sekisov A. G., Lavrov A. Yu., Rasskazov A. V. Photochemical and electrochemical processes in geotechnology. Chita : ZabGU, 2019. 306 p.
6. Alves K. S., Sanchez S. B., Barreiro J. G., Palomares R. M., Compaña Prieto J. M. Morphological and compositional analysis of alluvial gold: The Fresnedoso gold placer (Spain). Ore Geology Reviews. 2020. Vol. 121. 103489.
7. Moiseenko V. G., Kuznetsova I. V. The role of gold, silver, and lead nanoparticles in the formation of deposits of precious metals. Doklady Earth Sciences. 2010. Vol. 430, No. 1. pp. 125–128.
8. Moiseenko V. G., Kuznetsova I. V. Nanogold in ancient limestone and dolomite of the Oktyabrskoe ore field (Priamurye). Doklady Earth Sciences. 2014. Vol. 456, No. 2. pp. 692–695.
9. Wang Y., Miller J. D. Current developments and applications of micro-CT for the 3D analysis of multiphase mineral systems in geometallurgy. Earth-Science Reviews. 2020. Vol. 211. 103406.

10. Zhou J., Gu Y. Geometallurgical characterization and automated mineralogy of gold ores. Gold Ore Processing. Adams. Amsterdam : Elsevier, 2016. pp. 95–112.
11. Martens E., Prommer H., Dai X., Sun J., Breuer P. et al. Electrokinetic in situ leaching of gold from intact ore. Hydrometallurgy. 2018. Vol. 178. pp. 124–136.
12. Sekisov A. G., Reznik Yu. N., Lavrov A. Yu., Shevchenko Yu. S., Zykov N. V. Method borehole cil from deep lying placers and man-made mineral formations. Patent RF, No. RU2504648 C1, Applied: 19.06.2012. Published: 20.01.2014. Bulletin No. 2
13. Martensa E., Zhang H., Prommera H., Greskowiakae J., Jeffrey M. et al. In situ recovery of gold: Column leaching experiments and reactive transport modeling. Hydrometallurgy. 2012. Vol. 125–126. pp. 16–23.
14. Martens E., Prommer H., Dai X., Wu M. Zh., Sun J. et al. Feasibility of electrokinetic in situ leaching of gold. Hydrometallurgy. 2018. Vol. 175. pp. 70–78.
15. Koch P.-H., Rosenkranz J. Sequential decision-making in mining and processing based on geometallurgical inputs. Minerals Engineering. 2020. Vol. 149. 106262.

Full content Promising geotechnologies for gold placer mining in Eastern Transbaikalia