title: Composition and formation conditions of noble metal ores of the Koykar-Svyatnavolok sill (Republic of Karelia)
metadata.name: dc.contributor.author
metadata.value: Petrov, Sergey V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Borozdin, Aleksey P.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Oleynik, Ivan L.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Tarasova, Irina P.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Kotova, Irina K.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Kotov, Sergey R.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Shelukhina, Yuliya S.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Kolusheva, Ol’ga S.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2023-09-05T17:12:01Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2023-09-05T17:12:01Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2023-06
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Petrov, S. V., Borozdin, A. P., Oleynik, I. L., Tarasova, I. P., Kotova, I. K., Kotov, S. R., Shelukhina, Yu. S., Kolusheva, O. S. (2023). Composition and formation conditions of noble metal ores of the Koykar-Svyatnavolok sill (Republic of Karelia). Vestnik of Saint Petersburg University. Earth Sciences, 68 (2), 235–264. https://doi.org/10.21638/spbu07.2023.203 (In Russian)
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2023.203
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/43957
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The Viksha iron ore deposit is confined to the Koykarsko-Sviatnavolok sill, where as a part
  of ore bodies, in addition to the main components — iron and titanium, it contains gold,
  platinum, and palladium. The purpose of this publication is to determine the type and patterns
  of noble metal mineralization in gabbro-dolerites of the Koykar-Svyatnavolok sill, to
  consider the mechanisms of accumulation and localization of precious metals in ore bodies.
  The repeated occurrence in the section of the intrusion of an association of two rock varieties
  of contrasting composition (high-iron — titanomagnetite gabbro-dolerites, and high siliceous — granophyres), as well as the revealed petrographic, petrochemical and geochemical
  regularities, allow us to consider liquid stratification of magmatic melt as a mechanism
  for the formation of ore titanomagnetite horizons (segregation). This liquid immiscibility led
  to the accumulation of noble metals in the high-iron fluidized liquate in accordance with distribution
  coefficients of nobel metals between silicate and oxide melts and between melt and
  fluid. The confinement of noble metal mineralization to sulfide, cobaltite-bornite-chalcopyrite
  accumulations in ore titanomagnetite horizons has been established, which corresponds to
  the low-sulfide noble metal type of mineralization. Precious metal mineralization is represented
  by both native mineral forms (arsenides, sulfoarsenides, antimonides and intermetallides
  of platinum group metals, gold and silver tellurides, electrum, native gold) and isomorphic
  impurities in bornite and cobaltite. The relationship between the formation of minerals bearing
  noble metals and the process of chloritization against the background of the transformation
  of protolith titanomagnetite is shown. A model for the concentration of precious metals
  from basaltoid melt in several stages is proposed: enrichment of fluidized high-iron ore liquat
  with precious metals; their accumulation in the residual fluid and in the sulfide liquid during
  the crystallization of ore liquat; their partial entry into the hydrothermal solution during fluid
  cooling and hydrothermal metasomatism of earlier crystals. The localization of noble metals
  occurred as the residual fluid cooled, due to the destruction of complex chloride and sulfide
  compounds with noble and non-ferrous metals and the crystallization of sulfide-precious
  metal paragenesis within the ore horizons.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Earth Sciences;Volume 68; Issue 2
metadata.lang: -
metadata.name: dc.subject
metadata.value: iron ore gabbro-dolerites
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Viksha deposit
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: low sulfide noble metal type of mineralization
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: model of concentration and localization of noble metals
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Composition and formation conditions of noble metal ores of the Koykar-Svyatnavolok sill (Republic of Karelia)
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 03.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/43957/1/03.pdf
resources.format: Adobe PDF
resources.size: 5,83 MB