title: Age of the coal accumulation in the Irkutsk Basin based on accessory zircon dating in the Azeisk deposit tonstein (LA-ICP-MS)
metadata.name: dc.contributor.author
metadata.value: Mikheeva, Ekaterina A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Demonterova, Elena I.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Khubanov, Valentin B.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Ivanov, Alexey V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Arzhannikova, Anastasia V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Arzhannikov, Sergei G.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Blinov, Anton V.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2020-12-16T21:28:52Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-12-16T21:28:52Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2020-09
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Mikheeva E.A., Demonterova E.I., Khubanov V.B., Ivanov A.V., Arzhannikova A.V., Arzhannikov S.G., Blinov A.V. (2020). Age of the coal accumulation in the Irkutsk Basin based on accessory zircon dating in the Azeisk deposit tonstein (LA-ICP-MS). Vestnik of Saint Petersburg University. Earth Sciences, 65 (3), 420–433.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2020.301
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/21646
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The Irkutsk Coal Basin is located in the south of the Siberian Platform. The deposits of the
  basin are represented by Jurassic continental sediments. Since the 1970s, tuffs and tuffaceous
  rocks have been found in sediments of the Irkutsk Coal Basin, but so far only fragmentary
  information has been available on them. Previously, the age of sediments in the Irkutsk Basin
  was determined by the biostratigraphic method. We studied a section of the Cheremkhovo
  Fm., the most ancient formation of the basin, at the Azeisk coal deposit (in the area of the
  town of Tulun) with the aim of obtaining a geochronological constraints on the timing of
  sedimentation. The paper shows that tonsteins, which are transformed to clay ash-fall layers
  within coals, are suitable for radioisotope dating by accessory zircons. U-Pb dating of accessory zircons in tonstein from an industrial coal seam was performed using the LA-ICP-MS
  method. The obtained U-Pb age of 187.44 +0.45 –1.60 Ma, falling into the Pliensbachian Age,
  indicates the period of maximum coal formation in the Irkutsk Basin. This is the first radiometric age determination for the timing of accumulation of coal in the Irkutsk Basin. In the
  context of paleogeographic reconstructions, this age determines the upper limit of the tectonic
  quiescence period, which created conditions for lacustrine-boggy sedimentation in the vast
  territory of the Irkutsk Basin.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: This work was supported by a grant from the RFBR (Russian Foundation for Basic Research) (Project
  No. 18-35-00216). The U-Pb isotope geochronological studies were performed at the Analytical Center for
  Mineralogical, Geochemical, and Isotope Research of the GI SB RAS in Ulan-Ude (Base Project IX.129.1.2.,
  State Registration Number AAAA-A16-116122110027-2).
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
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 3
metadata.lang: -
metadata.name: dc.subject
metadata.value: Jurassic Period
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: volcanism
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: tonstein
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Irkutsk coal Basin
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: accessory zircons
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: U-Pb dating
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Age of the coal accumulation in the Irkutsk Basin based on accessory zircon dating in the Azeisk deposit tonstein (LA-ICP-MS)
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 420-433.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/21646/1/420-433.pdf
resources.format: Adobe PDF
resources.size: 3,77 MB