EUROBRIDGE: New insight into the geodynamic evolution of the East European Craton

Svetlana Bogdanova, Roland Gorbatschev, Marek Grad, Alexander Guterch, Tomasz Janik, Elena Kozlovskaya, Gediminas Motuza, Grazina Skridlaite, Vitaly Starostenko, Ludmila Taran

Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

Abstract

Abstract in Undetermined
The Palaeoproterozoic crust and upper mantle in the region between the Ukrainian and Baltic shields of the East European Craton were built up finally during collision of the previously independent Fennoscandian and Sarmatian crustal segments at c. 1.8-1.7 Ga. EUROBRIDGE seismic profiling and geophysical modelling across the southwestern part of the Craton suggest that the Central Belarus Suture Zone is the junction between the two colliding segments. This junction is marked by strong deformation of the crust and the presence of a metamorphic core complex. At 1.80-1.74 Ga, major late to post-collisional extension and magmatism affected the part of Sarmatia adjoining the Central Belarus Zone and generated a high-velocity layer at the base of the crust. Other sutures separating terranes of different ages are found within Sarmatia and in the Polish-Lithuanian part of Fennoscandia. While Fennoscandia and Sarmatia were still a long distance apart, orogeny was dominantly accretionary. The accreted Palaeoproterozoic terranes in the Baltic-Belarus region of Fennoscandia are all younger than 2.0 Ga (2.0-1.9, 1.90-1.85 and 1.84-1.82 Ga), whereas those in Sarmatia have ages of c. 2.2-2.1 and 2.0-1.95 Ga. Lithospheric deformation and magmatism at c. 1.50-1.45 Ga, and Devonian rifting, are also defined by the EUROBRIDGE seismic and gravity models.
Original languageEnglish
Title of host publicationEuropean Lithosphere Dynamics (Memoirs)
EditorsDavid Gee, Randell Stephenson
PublisherGeological Society of London
Pages599-628
Volume32
ISBN (Print)1-86239-212-9
DOIs
Publication statusPublished - 2006
Externally publishedYes

Publication series

Name
Volume32

Subject classification (UKÄ)

  • Geology

Free keywords

  • EUROBRIDGE
  • East European Craton
  • Precambrian
  • seismics

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