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V. G. Lazarenkov
V. G. Lazarenkov
National Mineral Resources University (Mining University)
Russia
National Mineral Resources University (Mining University)
Russia
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Articles

  • Date submitted
    2016-11-10
  • Date accepted
  • Date published

Conditions of the natural electric field formation at the silicate nickel deposits of weathering crust

Possibility of the natural electric field formation in conditions of the lateritic  weathering crust of the ultra basic rocks in presence of extended in depth  magnetite bearing bodies is proved. Theoretical curves of concentration of the dissolved oxygen and oxidized forms of magnetite are obtained. It is enough satisfied coincidence with the experimental data.

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O. F. Putikov, V. G. Lazarenkov, I. V. Talovina, N. P. Sechina Conditions of the natural electric field formation at the silicate nickel deposits of weathering crust. Journal of Mining Institute. Vol 200. p. 81.
  • Date submitted
    2016-11-10
  • Date accepted
  • Date published

Isotope ratio 87Sr/86Sr in rocks and ores of the Sakhara and Ufalei supergene nickel deposits in Urals

Isotope ratio 87Sr/86Sr was determined for the first time for the Ufalei and Sakhara supergene nickel deposits. The average obtained 87Sr/86Sr ratio in the Sakhara deposit (0,70838) is higher then in the Ufalei deposit (0,70697). In both deposits 87Sr/86Sr ratio increases from low-altered serpentinite rocks of the lower part of the deposits (0,70583 and 0,70687) to exogenous iron-oxide rocks of the upper part of the deposits (0,70917 and 0,71004).

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N. I. Vorontsova, I. V. Talovina, V. G. Lazarenkov, A. M. Gaifutdinova, M. Tikhomirova Isotope ratio 87Sr/86Sr in rocks and ores of the Sakhara and Ufalei supergene nickel deposits in Urals. Journal of Mining Institute. Vol 200. p. 179.
  • Date submitted
    2016-11-10
  • Date accepted
  • Date published

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 Rare earth elements in platinum bearing vein chromitites of Nizhni Tagil pyroxenite-dunite massif, Central Urals. Journal of Mining Institute. Vol 200. p. 222.
  • Date submitted
    2016-11-10
  • Date accepted
  • Date published

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 Platinum bearing vein chromites of Svetly Bor pyroxenite-dunite massif, Central Urals. Journal of Mining Institute. Vol 200. p. 249.
  • Date submitted
    2016-11-10
  • Date accepted
  • Date published

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 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.
  • Date submitted
    2016-11-25
  • Date accepted
  • Date published

Row of chemical element mobility In rich lizardite-nepouite ores of the Elov supergene Nickel deposit (Northern Urals)

We have analysed chemical of nepouites. NiO content in then ranges from 13,00 to 35,18 %, MgO from 18,29 to 44,61 %, i.e. the composition of nepouite corresponds to the composition of Mg-nepouite. General row of chemical element mobility in lizardite – nepouite ores of the Elov supergene nickel deposit is the following: (Mo, Sb, Se, W)20-35 > (Sn, As, Ni)10-20 > (Pb, Be, U)3-7 > (Ti, Ga, Mn)1-3 > (Th, Rb, Si)~1  > (Al, V, Co, Tm, Zn, Mg)0,6-0,9  > (Yb, Ca, Cu)0,4-0,5  > (Sc, Cr, Zr, Sr, Ba,  Y, Ta, TR)0,1-0,4 > (Cs, Nb; Ag, Te, Bi, Au)< 0,01-0,1.

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O. P. Mezentseva, V. G. Lazarenkov, I. V. Talovina, N. I. Vorontsova Row of chemical element mobility In rich lizardite-nepouite ores of the Elov supergene Nickel deposit (Northern Urals). Journal of Mining Institute. Vol 194. p. 91.
  • Date submitted
    2016-11-25
  • Date accepted
  • Date published

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 Geochemical barriers in supergene nickel deposit on the example Buruktal deposit (South Urals). Journal of Mining Institute. Vol 194. p. 112.
  • Date submitted
    2016-12-28
  • Date accepted
  • Date published

Prospects of nickel industry in the urals in the light of ore field structure study in supergene nickel deposits

Tectonic fractures of meridian spread, masked by block system of neotectonic breaks, play the leading role in structural control of nickel mineralization in supergene nickel deposits in the Urals. The deposits have long-term genesis and polygenic character. They are characterized by intensive tectonic and hydrothermal workup of Paleozoic substrate and block structure with small amplitude of vertical displacement. All of them have a two-floor structure, where upper supergene floor has a «background» of lower hydrothermal floor. This fact considerably increases the field of geological prospecting and searching of new oxide-silicate nickel deposits in the Uralian region.

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N. I. Vorontsova, I. V. Talovina, V. G. Lazarenkov, S. O. Ryzhkova, O. P. Mezentseva Prospects of nickel industry in the urals in the light of ore field structure study in supergene nickel deposits. Journal of Mining Institute. Vol 183. p. 78.
  • Date submitted
    2016-12-28
  • Date accepted
  • Date published

Nickel-containing iron oxides in the Buruktal deposit, South Urals

In the Buruktal supergene nickel deposit, iron oxides possess vertical mineralogical zoning (bottom-up): magnetite-maghemite-goethite-hematite. The main rock- and ore-forming mineral in the iron-oxide zone of the deposit is magnetite, presented by three generations: primary relic magnetite, surviving from ultramafic rocks; secondary magnetite, forming at serpentinization process and neogenic supergene magnetite. Supergene magnetite, like a goethite, is nickel ore mineral, containing about 1 % NiO. Under the complex thermal analysis data, maghemite-magnetite and goethite have two main diagnostic maximums: exothermal effect of magnetite, caused by magnetite oxidation to maghemite in the interval 317‑340 °С, displays maximum at 327 °С («magnetite» point), and endothermic effect of goethite, connected with loss of constitutional water of the mineral and its transition to hematite in the interval 269‑296 °С, displays maximum at 288 °С («goethite» point).

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S. O. Ryzhkova, I. V. Talovina, V. G. Lazarenkov, N. I. Vorontsova, V. L. Ugolkov Nickel-containing iron oxides in the Buruktal deposit, South Urals. Journal of Mining Institute. Vol 183. p. 101.