title: Detrital zircon record of the Mesoproterozoic to Lower Cambrian sequences of NW Russia: implications for the paleogeography of the Baltic interior
metadata.name: dc.contributor.author
metadata.value: Ершова, Виктория Бэртовна
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2020-09-08T16:43:12Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-09-08T16:43:12Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2019
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/19292
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U–Pb detrital zircon isotope
  data from Mesoproterozoic to Lower Cambrian strata of the St Petersburg region are used to characterize
  the paleogeographic and tectonic evolution of the Baltica continent. We dated fifteen samples
  and divided them into three groups based on their distribution of detrital zircons. The first group
  (comprising Lower Mesoproterozoic rocks) is dominated by Early Mesoproterozoic and Late
  Paleoproterozoic zircons, mostly derived from weathering of proximal source region including rapakivi
  granites exposed across the neighboring Baltic Shield. The second group includes Upper Ediacaran
  samples (Redkino and Kotlin Regional Stages), with major zircon populations ranging in age between
  1970–1850 and 1600–1550 Ma, respectively, correlating with magmatic and metamorphic events within
  the Svecofennian Orogeny and rapakivi granite igneous activity in the interior of Fennoscandia. The
  third group of samples, collected from both the uppermost Ediacaran and lowermost Cambrian
  deposits (Kotlin, Lontova and Dominopol Regional Stages), contains older Paleo-Mesoproterozoic
  zircons as well as Late Neoproterozoic-earliest Cambrian zircons, indicating a Timanian source area
  and exhibiting a age spectra similar to spectra for coeval rocks of the Scandinavian Caledonides.
  Therefore, we conclude that reworking and transport of continental detritus from the Timanian
  Orogen began during Late Ediacaran, earlier than previously supposed, with transport of Timanian
  detritus not only to the marginal part of Baltica (known from the Scandinavian Caledonides), but also to
  the distal interior of Baltica.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Detrital zircon record of the Mesoproterozoic to Lower Cambrian sequences of NW Russia: implications for the paleogeography of the Baltic interior
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: Ershova-et-al-2019-GFF.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/19292/1/Ershova-et-al-2019-GFF.pdf
resources.format: Adobe PDF
resources.size: 2,62 MB