Ore quality deterioration necessitates finding of alternative sources of noble metals and dictates extraction of low-grade ore and processing of waste materials with fine and dispersed gold. At the same time, it is of the current concern to obtain reliable data on content of noble metals of non-gravitational size and to develop efficient techniques to extract them. Iron ore deposits are one of the critical potential unconventional sources of noble metals. Noble metals are present nearly in all commercial genetic types of iron ore. The article describes the research data on noble metal content in tailings of gravity separation of various-type iron-and-manganese ore and enclosing rocks in the Poperechnoe field (South Khingan) using the authors’ procedure based on mineralogical geochemical and geological assessment, detection of monofractions of noble metals, determination of finely dispersed gold content by the atomic absorption method, as well as detailing of composition and structure of noble metal formations. The electron-microscopic analysis finds platinum in magnetite-type ore with coarseness from 50 to 110 μm. Gold is found in all types of ore ad in enclosing rocks; gold particles are from 30 to 200 μm in size, and contain admixture of silver and rock-forming mineral shots. Gold content of gravity separation tailings is from 0.46 to 1.31 g/t. From the accomplished research, it is decided to be efficient to carry out in-process test on gold recovery by leaching with mechanical activation and selection of reagent regime for ore of various material constitution.

For citation:  Litvinova N. M., Lavrik N. A., Lavrik A. V., Konareva T. G. Noble metal grains not under control of gravity in Iron-and-manganese ore. MIAB. Mining Inf. Anal. Bull. 2019;(7):174-184. [In Russ]. DOI: 10.25018/0236-1493-2019-07-0-174-184.


Iron-and-manganese ore, gold, platinum, grain-size composition, noble metal mineralization, electron microscopic analysis, gravity separation, mineral aggregates.

Issue number: 7
Year: 2019
ISBN: 0236-1493
UDK: 549.271.3+549.283
DOI: 10.25018/0236-1493-2019-07-0-174-184
Authors: Litvinova N. M., Lavrik N. A., Lavrik A. V., Konareva T. G.

About authors: N. M. Litvinova, Cand. Sci. (Eng.), Leading Researcher, e-mail:, N. A. Lavrik, Senior Researcher, e-mail:, А. V. Lavrik, Engineer, e-mail:, T. G. Konareva, Researcher, e-mail:, Mining Institute, Far Eastern Branch of Russian Academy of Sciences, 680000, Khabarovsk, Russia. Corresponding author: N. M. Litvinova, e-mail:


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