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Yu. B. Marin
Yu. B. Marin
National Mineral Recources University (Mining University)
National Mineral Recources University (Mining University)
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Articles

Geology
  • Date submitted
    2016-10-06
  • Date published
    2016-03-01

Ontogenic analysis of mineral individuals at micro- and nanolevel for the restoration of ore-forming conditions and assessment of minerals processing properties

While organizing the ore preparation system and selecting optimal methods for minerals separation, it is necessary to take into account typomorphic characteristics and properties of minerals and their aggregates that determine mineralogical and technological features of ore types and grades. Fine-dispersed ore is included into the process flow sheet; accounting particle size becomes the determining factor in ore processing technologies. With disintegration of mineral aggregate, disclosure of intergrowths, and release of intergrowth surface, its structure is relaxed to form new bonds. Mineral individual boundary can «open an individual» for its decomposition (dissolution) or growth; it can take over the functions of grain volume conservation. Adapting the aggregate to the external environment is due to the change in orientation, length and area of boundaries of individuals and the buffer zone of their intergrowth. All structural changes in mineral aggregate proceed in accordance with the energy balance of individual boundaries and boundaries of their intergrowth; therewith, substance, crystal lattice of mineral individuals are being «refined», its defects and dislocations are being annihilated. In the process of relaxation of the structure of a mineral, another mineral can arise, which individuals can remain in a dispersed state or be capable of aggregation depending on the energy balance of their boundaries and the matrix. Ontogenetic approach to the assessment of the features of mineral individuals and aggregates serves the purpose of restoration of ore-formation environment, provides a choice of optimum conditions of the disclosure of useful component grains, when in addition to the grain size, their shape, intergrowth nature, features of the boundaries of intergrowing minerals, heterogeneities of the composition and properties of mineral individuals are taken into account. It is resulted in the appearance of new opportunities of profitable and more environmentally friendly mining, ore potential revaluation towards lowering the grade, determination of cost-effective range of components extracted simultaneously.

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R. L. Brodskaya, Yu. B. Marin (2016) Ontogenic analysis of mineral individuals at micro- and nanolevel for the restoration of ore-forming conditions and assessment of minerals processing properties. Journal of Mining Institute. Vol 219. p. 369. DOI: 10.18454/pmi.2016.3.369
Geology and metallogeny
  • Date submitted
    2016-11-10
  • Date published
    2013-01-01

Geodynamic types of rare-metal granite magmatism and associated ore deposits

Matrix systematic of the rare-metals granite magmatism and related ore metallization is represented as a table, where geodynamic types of intrusive groups form columns, and genetic types  of ore metallization – lines (from rare-metal volcanites, granites and pegmatites to weathering crusts and placers). Cells in crossing of lines and columns include as well known so probable geological-industrial types of ore deposits. Analysis of this table shows which types of deposits may be combined in clusters, and which ones correspond to principally different ore-magmatic systems and, thus, can’t occur in a common cluster (except in combination of diachronous groups). Regularities of the rare-metal granites distribution through geological time correlate with the direct evolution of geodynamic environments in the Earth’s history.

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S. M. Beskin, Yu. B. Marin (2013) Geodynamic types of rare-metal granite magmatism and associated ore deposits. Journal of Mining Institute. Vol 200. p. 155.