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Geochronology and geodynamic setting of Rhyacian (2.25-2.03 Ga) orogenic zones in Sarmatia (SW Baltica)

Authors

Shumlyanskyy,  Leonid
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Bekker,  Andrey
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Billstrom,  Kjell
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Claesson,  Stefan
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/persons/resource/romer

Romer,  R. L.
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Albekov,  Aleksandr
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Rudenko,  Kseniia
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Citation

Shumlyanskyy, L., Bekker, A., Billstrom, K., Claesson, S., Romer, R. L., Albekov, A., Rudenko, K. (2017): Geochronology and geodynamic setting of Rhyacian (2.25-2.03 Ga) orogenic zones in Sarmatia (SW Baltica). - In: Mercier-Langevin, P. (Ed.), Mineral resources to discover: proceedings: 14th SGA biennial meeting August 20-23 2017, Québec City, Canada, Québec : Society for Geology Applied to Mineral Deposits, 253-256.


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_3733896
Abstract
A large set of recently acquired U-Pb zircon age and Nd isotope data is presented and discussed in terms of the geotectonic evolution of Sarmatia during the Rhyacian. It is shown that a large portion of continental crust within Sarmatia, including the East Sarmatian and Teteriv-Ingul orogens, was formed during the Rhyacian. Deposition of sedimentary rocks started at ca. 2.25-2.20 Ga and these rocks were metamorphosed and migmatized at 2115-2090 Ma. Extensive development of felsic and mafic igneous complexes at 2080-2030 Ma was likely related to the post-collisional extension with delamination of the lithospheric mantle. Metamorphic and magmatic events at ca. 2.1-2.0 Ga were linked to a collision between the Sarmatia and Volgo-Uralia segments of Baltica. Continued subduction along the northern margin of the assembled craton has eventually resulted in a collision with Fennoscandia at ca. 1.82 Ga.