title: Evolution of the Early Proterozoic (Ludikovian) riftogenic basin of the southwestern margin of the Karelian Craton (Baltic Shield)
metadata.name: dc.contributor.author
metadata.value: Kotova, Irina K.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Gordon, Faina A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Magaeva, Anna N.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2020-05-28T20:56:19Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-05-28T20:56:19Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2020-03
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Kotova, I. K., Gordon, F. A., Magaeva, A. N. (2020). Evolution of the Early Proterozoic (Ludikovian) riftogenic basin of the southwestern margin of the Karelian Craton (Baltic Shield). Vestnik of Saint Petersburg University. Earth Sciences, 65 (1), 51–73.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2020.104
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/17963
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The geological structure and stratigraphic sections of typical areas of Ludikovian sediments on
  the northeast coast of the Lake Ladoga (Republic of Karelia) were studied. The formation of
  these strata is associated with the development in the Ludikovian time period of the extensive
  sedimentary basin, which was formed on the Archean crystalline basement of the Karelian
  craton. Variations in the composition and thickness of these metamorphosed Lower Proterozoic
  sedimentary and volcanic-sedimentary complexes, both laterally and in section, suggest
  a very disjointed bottom relief of the Ludikovian paleobasin and changing sedimentation conditions
  during the development of this structure. The reconstruction of the primary composition of metamorphosed volcanogenic and sedimentary rocks of Ludikovian rocks was carried
  out based on petrochemical and petrographic characteristics. The protolith of the rocks lying
  at the base of the Ludikovian strata was mainly carbonate and partly terrigenous sandy-clay
  sediments; the central part of the section is composed of metabasalts; ash, carbonate and clay
  sedimentary material with partly siliceous matter most likely associated with post-volcanic
  underwater exhalations and hydrothermal activity served as the protolith of metamorphosed
  volcanic-sedimentary rocks of the upper part of the section. Various environments of sedimentation
  in the Ludikovian paleobasin were designated: a complex of graphite-containing
  rocks was formed in deep-water paleodepressions of the bottom of the sea basin with oxygen
  deficiency; carbonate and clay sediments accumulated in the zones of free hydrodynamics.
  According to the results of the analysis of the contents of rare-earth elements, the complexes
  of “continental” and “oceanic” metabasalts, spatially combined as a result of the overthrust
  tectonics of the accretion-collision stage of development of the territory, were identified. We
  propose a scheme of the evolution of the Ludikovian paleobasin formed in the conditions of
  the developing riftogenesis, in transition from continental to oceanic environments, with the
  formation of sediments of the “Red Sea” type.
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: Ludikovian deposits
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: metamorphic volcanogenic-sedimentary strata
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: graphite-containing complexes
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: sulphide-containing siliceous rocks
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Evolution of the Early Proterozoic (Ludikovian) riftogenic basin of the southwestern margin of the Karelian Craton (Baltic Shield)
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 51-73.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/17963/1/51-73.pdf
resources.format: Adobe PDF
resources.size: 1,31 MB