The Precambrian sedimentary succession of Middle Timan provides important information on the coeval history of Baltica prior to assembly of the Rodinia supercontinent. This study comprises a comprehensive integrated provenance study based on samples collected from Precambrian clastic rocks of the Chetlassky Kamen and Volsko-Vymskaya Ridge. The maximum depositional age of the studied succession is constrained as latest Mesoproterozoic – earliest Neoproterozoic based on the youngest detrital zircon and rutile ages. Metasandstone samples within the succession are arkose, sublitharenite and litharenite. The distributions of detrital zircon U-Pb ages from the studied metasedimentary rocks are very comparable, yielding approximately 50% Mesoproterozoic ages within the ranges 1470 – 1550 and 1170 – 1370 Ma, 45% Paleoproterozoic ages and 5% Archean ages, with predominant populations grouping at 2500–2700 and 1800–1900 Ma. Comparable detrital zircon age distributions within the coeval strata of northern Baltica suggest a common provenance area. Analysis of detrital rutile suggests the widespread distribution of latest Mesoproterozoic – earliest Neoproterozoic metamorphism within the provenance area. A comparison of detrital zircon age distributions from the coeval strata of Baltica and Laurentia also revealed a striking similarity. Therefore, we suggest that clasts were in fact predominantly sourced from the Grenvillian-Sveconorwegian Orogen, with possible reworking of older zircon grains from older sedimentary rocks involved in the deformation and uplift. Our data support the tectonic model invoking a continuation of the Grenvillian-Sveconorwegian Orogen further to the east across the Barents Sea from its closest modern outcrop in Scandinavia.

Original languageEnglish
Article number106580
JournalPrecambrian Research
Volume371
DOIs
StatePublished - Apr 2022

    Research areas

  • Baltica, Detrital rutile, Detrital zircon, Grenvillian-Sveconorwegian Orogen, Mesoproterozoic, Middle Timan, Neoproterozoic

    Scopus subject areas

  • Geology
  • Geochemistry and Petrology

ID: 94128062