Tracing proto-Rheic - Qaidam Ocean vestiges into the Western Tatra Mountains 
and implications for the Palaeozoic palaeogeography of Central Europe

Burda, Jolanta; Klötzli, Urs; Majka, Jarosław; Chew, David; Li, Qiu-Li; Liu, Yu; Gawęda, Aleksandra; Wiedenbeck, Michael; GFZ SIMS Publications, Deutsches GeoForschungsZentrum

doi:10.1016/j.gr.2020.12.016

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Tracing proto-Rheic - Qaidam Ocean vestiges into the Western Tatra Mountains and implications for the Palaeozoic palaeogeography of Central Europe

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Burda, Jolanta
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Klötzli, Urs
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Majka, Jarosław
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Chew, David
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Li, Qiu-Li
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Liu, Yu
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Gawęda, Aleksandra
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Wiedenbeck, Michael
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

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Citation

Burda, J., Klötzli, U., Majka, J., Chew, D., Li, Q.-L., Liu, Y., Gawęda, A., Wiedenbeck, M. (2021): Tracing proto-Rheic - Qaidam Ocean vestiges into the Western Tatra Mountains and implications for the Palaeozoic palaeogeography of Central Europe. - Gondwana Research, 91, 188-204.
https://doi.org/10.1016/j.gr.2020.12.016

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5004686

Abstract

Zircon petrochronology from amphibolites and retrogressed eclogites from the basement of the Western Tatra Mountains (CentralWestern Carpathians) reveals a complex rock evolution. An island-arc related basaltic amphibolite from Žiarska Valley shows three distinct zircon forming events: igneous zircon growth at ca. 498 Ma (Middle/Late Cambrian) and two phases of amphibolite-facies metamorphism at ca. 470 Ma (Early Ordovician) and at ca. 344 Ma (Early Carboniferous). A retrogressed eclogite from Baranèc Mountain records two zircon forming events: metamorphic zircon growth under eclogite-facies conditions at ca. 367 Ma (Late Devonian) and amphibolite-facies metamorphism at ca. 349 Ma (Early Carboniferous). These data contribute towards understanding and correlating major tectonothermal events that shaped the eastern margin of Gondwana in the Early Palaeozoic and its subsequent Variscan evolution. The metabasites record vestiges of two completely independent oceanic domains preserved within the Central Western Carpathians: (1) An Ediacaran to Cambrian oceanic arc related to the proto-Rheic - Qaidam oceans and metamorphosed to amphibolite-facies in the Early Ordovician subduction of the proto-Rheic - Qaidam arc during the Cenerian orogeny (ca. 470 Ma) and (2) Late Devonian oceanic crust related to a back-arc basin (Pernek-type), formed by the opening of the Paleotethys and metamorphosed to eclogite-facies during Devonian subduction (ca. 367 Ma). The common Variscan and later evolution of these oceanic remnants commenced with amphibolite-facies metamorphic overprinting in the Early Carboniferous (amphibolite: ca. 344Ma; retrogressed eclogite: ca. 349Ma) related to an Early Variscan consolidation and the formation of Pangea. None of the investigated rocks of the Central Western Carpathians show any evidence of being chronologically or palaeogeographically related to the Rheic Ocean, therefore any prolongation of the Rheic suture from the Sudetes into the Alpine-Carpathian realm is highly problematic. Instead, the Southern and Central Alpine Cenerian orogeny can be traced into the CentralWestern Carpathians.