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

Bonev, Nikolay; Spikings, Richard Alan; Moritz, Robert

doi:10.1017/S0016756820000953

Scientific article

English

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

ContributorsBonev, Nikolay; Spikings, Richard Alan; Moritz, Robert

Published inGeological Magazine, vol. 157, p. 2106-2112

Publication date2020

Abstract

We 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.

Keywords

40Ar/39Ar geochronology
Sakar–Strandzha
Zone
Bulgaria

Affiliation entities

Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département des sciences de la Terre

Research groups

Mineral Resources and Geofluids

Citation (ISO format)

BONEV, Nikolay, SPIKINGS, Richard Alan, MORITZ, Robert. ⁴⁰Ar/³⁹Ar age constraints for an early Alpine metamorphism of the Sakar unit, Sakar–Strandzha zone, Bulgaria. In: Geological Magazine, 2020, vol. 157, p. 2106–2112. doi: 10.1017/S0016756820000953

Article (Published version)

Identifiers

PID : unige:141386
DOI : 10.1017/S0016756820000953

Additional URL for this publicationhttps://www.cambridge.org/core/product/identifier/S0016756820000953/type/journal_article

Journal ISSN0016-7568

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

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