title: Lithogeochemistry of clastic rocks of the Mashak Formation (western slope of the South Urals): In search of “camouflaged” pyroclastics
metadata.name: dc.contributor.author
metadata.value: Maslov, Andrey V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Gareev, Emir Z.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Podkovyrov, Victor N.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Kovalev, Sergey G.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2020-05-28T21:25:27Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-05-28T21:25:27Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2020-03
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Maslov, A. V., Gareev, E. Z., Podkovyrov, V. N., Kovalev, S. G. (2020). Lithogeochemistry of clastic rocks of the Mashak Formation (western slope of the South Urals): In search of “camouflaged” pyroclastics. Vestnik of Saint Petersburg University. Earth Sciences, 65 (1), 121–145.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2020.107
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/17966
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The article attempts to solve the problem of the presence of “camouflaged” pyroclastics in
  sandstones and fine-grained clastic rocks of the Middle Riphean Mashak Formation of the
  Southern Urals based on litho- and geochemical methods and approaches. As a result of the
  studies, it was established that in the NKM–GM diagram, the compositional field of silt-clayey
  rocks of the Mashak Formation is comparable with several clusters of Jurassic slates of the
  Greater Caucasus, containing volcanogenic material, while the clusters of Paleogene tuffs of
  the Ukrainian Carpathians and the Gromashor Formation (Pai-Khoi) have a different location.
  On the (Na2O + K2O) – GM diagram, in the indicated field, are situated two of four clusters of
  metatuffoids and mixed volcanic-sedimentary rocks of the Strelna Group (Kola Peninsula),
  and one of two clusters of tuffs of the Redkino horizon (Vendian of the East European
  Platform). The same is true for a number of other examples. In the diagram (Na2O + K2O) – FM,
  none of the four clusters of tuffs and tuffopelites of the Ordovician of the Arga-Tas zone of
  the Momsky horst-anticlinorium and none of the six clusters of acidic tuffs and tuffites of Ukrainian Carpathians fit in, etc. Consequently, the localization of the compositional field
  of silt-clayey rocks of the Mashak Formation in the above and a number of other diagrams
  shows that clusters of various volcanic-terrigenous rocks, metatuffosiltstones, metatuffoids,
  slates, etc., containing a certain admixture of volcanic products, coincide with the diagrams
  in half or fewer of the cases. Thus, the analysis of the absolute contents and indicator ratios
  of trace elements inherent in sandstones and clayey rocks, values of petrochemical modules
  and the systematics of rare-earth elements (REE) does not allow us to state with certainty that
  magmatic processes, including subsynchronous sedimentation, were the main source of their
  constituent material.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: The studies were supported by the Russian Science Foundation (grant no. 19-17-00099, A. V. Maslov,
  analysis and interpretation of the results).
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 65; Issue 1
metadata.lang: -
metadata.name: dc.subject
metadata.value: Southern Urals
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Middle Riphean
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Mashak Formation
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: sandstones
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: clay rocks
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: lithogeochemistry
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Lithogeochemistry of clastic rocks of the Mashak Formation (western slope of the South Urals): In search of “camouflaged” pyroclastics
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 121-145.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/17966/1/121-145.pdf
resources.format: Adobe PDF
resources.size: 5,53 MB