40Ar/39Ar age constraints for an early Alpine metamorphism of the Sakar unit, Sakar–Strandzha zone, Bulgaria-Reference-Cited by-同舟云学术

40Ar/39Ar age constraints for an early Alpine metamorphism of the Sakar unit, Sakar–Strandzha zone, Bulgaria

Published:2020-09-14 Issue:12 Volume:157 Page:2106-2112
ISSN:0016-7568
Container-title:Geological Magazine
language:en
Short-container-title:Geol. Mag.

Author:

Bonev Nikolay^ORCID,Spikings Richard,Moritz Robert

Abstract

AbstractWe investigated the Sakar unit metamorphic rocks of the Sakar–Strandzha zone in Bulgaria, using 40Ar/39Ar dating of amphibole from the polymetamorphic basement and white mica in the overlying upper Permian metasedimentary rocks of the Paleokastro Formation. The amphibole and white mica revealed plateau ages of 140.50 ± 1.75 Ma and 126.19 ± 1.29 Ma, respectively, indicating an Early Cretaceous cooling history of the regional amphibolite-facies metamorphism to greenschist-facies conditions. Similar metamorphic grades and cooling histories of the Sakar unit share evidence with the nearby Rhodope Massif for the northern Aegean region-wide early Alpine tectonometamorphic event.

Publisher

Cambridge University Press (CUP)

Subject

Geology

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