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U—Pb single zircon data of granitoids from the High Tatra Mountains (Slovakia): implications for the geodynamic evolution

Published online by Cambridge University Press:  03 November 2011

Ulrike Poller  and
Wolfgang Todt
Ulrike Poller
Affiliation:
Max-Plank-Institut für Chemie, Abt. Geochemie, Postfach 3060, D-55020 Mainz,Germany e-mail: poller@mpch-mainz,.mpg.de
Wolfgang Todt
Affiliation:
Max-Plank-Institut für Chemie, Abt. Geochemie, Postfach 3060, D-55020 Mainz, Germany
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Abstract

New U/Pb results by cathodoluminescence-controlled single zircon dating of rocks from the High Tatra Mountains (Slovakia) constrain ages for the protolith at 2Ga for the granitoids and 3 Ga for the Koncistá migmatite. Concordant single zircon ages date the intrusion of the migmatite precursor at 3567 Ma and the migmatisation at 332 ± 5 Ma. The intrusion of this precursor corresponds with the major granite intrusion in the Western Tatra Mountains. The geodynamic scenario at this time is described as slab detachment of subducted oceanic crust at the active continental margin of Gondwana. The resulting upwelling of asthenospheric mantle brought enough heat for the anatexis of old metasediments and the production of new H- to S-type granites. High Tatra diorites have an intrusion age of 341 ± 5 Ma, constrained by a concordant single zircon age. This age marks the beginning of the Variscan collision of the two convergent continents Laurasia and Gondwana. The intrusion of granites in the High Tatra was confirmed by concordant data at 314 ± 4 Ma, documenting the final stage of the Variscan continent collision.

Keywords

Carpathianscontinental crustgeochronologyVariscides
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 91 , Issue 1-2: Fourth Hutton Symposium: The Origin of Granites and Related Rocks , 2000 , pp. 235 - 243
Copyright
Copyright © Royal Society of Edinburgh 2000

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