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A. G. Pilyugin
A. G. Pilyugin
National Mineral Resources University (Mining University)
National Mineral Resources University (Mining University)
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Articles

Geological support for Russia’s mineral resources development
  • Date submitted
    2016-10-13
  • Date published
    2015-02-01

Geochemical features of platiniferous dunites of the Svetloborsky and Nizhnetagilsky massifs, the platinum belt of the Urals

The article encompasses new data on geochemistry of dunites forming the Svetloborsky and Nizhnetagilsky ultramafic massifs of the Ural Platinum Belt. Petrogenesis of both massifs is discussed based on their interpretation. The research establishes that both massifs are petro-chemical equivalents of alpinotype complexes and zonal massifs, but at the same time they have their own particularities. Thus, dunites of the Svetloborsky massif are enriched in almost all rare elements compared to the Nizhnetagilsky massif that may be caused by their redistribution during subsequent processes due to intrusion of mafic dykes.

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A. G. Pilyugin, I. V. Talovina, A. M. Duryagina, V. S. Nikiforova (2015) Geochemical features of platiniferous dunites of the Svetloborsky and Nizhnetagilsky massifs, the platinum belt of the Urals. Journal of Mining Institute. Vol 212. p. 50.
Geology
  • Date submitted
    2016-10-13
  • Date published
    2015-01-01

Comparison of the composition of platinum group minerals in chromitites and placers of Nizhni Tagil massif, Central Urals

The results of the chemical composition of platinum minerals from ore body and placers of Nizhni Tagil massif of Ural Platinum Belt are summarized in the given article. Peculiar properties of the chemical composition of the platinum group minerals from ore body and placers are established and described. X-ray analysis data of the most common mineral species was ob-tained and the internal structure of granular aggregates and mono crystals was studied with due regard to the various irregularities.

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S. Yu. Stepanov, A. G. Pilyugin, A. A. Zolotarev (2015) Comparison of the composition of platinum group minerals in chromitites and placers of Nizhni Tagil massif, Central Urals. Journal of Mining Institute. Vol 211. p. 22.
Geology and metallogeny
  • Date submitted
    2016-11-10
  • Date published
    2013-01-01

Rare earth elements in platinum bearing vein chromitites of Nizhni Tagil pyroxenite-dunite massif, Central Urals

Chromitites of Nizhni Tagil massif veins in length from a few centimeters to several meters. The contents of rare earth elements in the platinum-veined chromitites characterized by reduced compared with the enclosing dunite values. In  quantitative terms, is dominated  by light rare earth elements. The positive correlation between the rare-earth elements  and  platinum group metals in the samples with normal contents. High and extremely high  content of PGE in  the chromite-platinum ores Nizhni Tagil massif are not accompanied by a significant increase in the concentrations of REE.

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V. G. Lazarenkov, A. G. Pilyugin, N. I. Vorontsova, I. V. Talovina (2013) Rare earth elements in platinum bearing vein chromitites of Nizhni Tagil pyroxenite-dunite massif, Central Urals. Journal of Mining Institute. Vol 200. p. 222.
Geology and metallogeny
  • Date submitted
    2016-11-10
  • Date published
    2013-01-01

Platinum bearing vein chromites of Svetly Bor pyroxenite-dunite massif, Central Urals

Platinum mineralization in Svetly Bor massif is represented by two promising mineral assemblages: chromite-platinum and platinum-type dunite. Body platinum of chromites lie within  the fields of small-and medium-grained dunite central part of the array. Spinel epigenetic vein platinum chromites of Svetly Bor clinopyroxenite-dunite massif have some geochemical features such as high iron content, low chromium and titanium. Changing the chemical composition of the constituent minerals chromites is the result of processes of serpentinization of dunites host and is accompanied  by the emergence of new mineral phases. Noble metal  mineralization  is represented  by fine  of up to 50 microns, mostly idiomorphic grains isoferroplatinum, tetraferroplatinum, osmiridium.

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A. G. Pilyugin, V. G. Lazarenkov, N. I. Vorontsova, I. V. Talovina, A. P. Kozlov, A. V. Antonov, U. Kempe (2013) Platinum bearing vein chromites of Svetly Bor pyroxenite-dunite massif, Central Urals. Journal of Mining Institute. Vol 200. p. 249.
Geology and metallogeny
  • Date submitted
    2016-11-10
  • Date published
    2013-01-01

Platinum group elements, gold and silver in supergene nickel deposits on dunite-harzburgite bedrock of ophiolitic massifs

Contents of platinum group elements (PGE), gold and silver in oxide-silicate nickel ores of the Buruktal, Ufalei and Elov supergene nickel deposits are determined in relation to their ophiolitic dunite-harzburgite  bedrock.

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I. V. Talovina, V. G. Lazarenkov, N. I. Vorontsova, A. G. Pilyugin, A. M. Gaifutdinova (2013) Platinum group elements, gold and silver in supergene nickel deposits on dunite-harzburgite bedrock of ophiolitic massifs. Journal of Mining Institute. Vol 200. p. 310.
Geology
  • Date submitted
    2016-11-17
  • Date published
    2012-02-01

Distribution of rare earth elements in ores Elov and Buructal supergene nickel deposits

Weathering processes and infiltration metasomatic processes in the weathering crusts hyperbasite arrays have a positive effect  on  the accumulation  of rare earth  elements. The content of rare earth elements is steadily increasing bottom-up on the profile of weathering.  Metasomatic upper profile characterized by a high content  of rare earth  elements, which leads to  the appearance of rare earth elements phosphate mineral phase – xenotime found in this laterite for the first time. The composition of the rare earth elements in incorporating their metasomatic and minerals demonstrates chondritic distribution.

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A. G. Pilyugin, I. V. Talovina, N. I. Vorontsova, S. O. Ryzhkova, O. P. Mezentseva (2012) Distribution of rare earth elements in ores Elov and Buructal supergene nickel deposits. Journal of Mining Institute. Vol 196. p. 31.
Current problems in geology and exploration of mineral deposits
  • Date submitted
    2016-11-25
  • Date published
    2011-06-01

Geochemical barriers in supergene nickel deposit on the example Buruktal deposit (South Urals)

The main geochemical barrier in supergene Buruktal nickel deposit is oxygen oxidized barrier in upper ferrous-oxide zone of the deposit. It makes sharp decrease of chemical element migration. Nevertheless, ore mineral concentrations present oft in complex geochemical barriers: absorbed-oxidized, carbonate-reducing and others. Every type of the geochemical barriers is able to concentrate specific association of migrated elements. That reflected on the different values of coefficients of enrichment in different types of Buruktal metasomatites. Oxidized barrier is more effective for elements with different valence (Fe, Mn), and absorbed clay, ferrous-oxide und manganese-oxide barriers are more effective for the main part of microelements.

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I. V. Talovina, V. G. Lazarenkov, N. I. Vorontsova, S. O. Ryzhkova, O. P. Mezentseva, A. G. Pilyugin (2011) Geochemical barriers in supergene nickel deposit on the example Buruktal deposit (South Urals). Journal of Mining Institute. Vol 194. p. 112.