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Late Variscan deformation events in the Bardo Syncline revealed by biotite K-Ar dating of Ludlow-age tuffite (Holy Cross Mountains, Poland)

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cris.lastimport.scopus2024-02-12T20:43:38Z
dc.abstract.enIn the Bardo Syncline (Holy Cross Mountains, Poland), two beds of tuffite (named the Niewachlów tuffites) have been discovered within greywackes of Ludlow (Silurian) age. K-Ar dating of the lower bed yielded an age of 292.8 ±4.0 Ma, while the upper bed provided an age of 341.9 ±4.3 Ma. The dates pertain to metamorphic alteration of the tuffite, related to reactivation of the Daleszyce Fault Zone. In this zone, biotite crystals present in the foliation zones were recrystallized and their K-Ar isotopic system was rejuvenated in a temperature range of ~270–300°C. The dates that were obtained define the ages of two tectono-metamorphic episodes and reflect the timing of displacements along the fault which, in turn, reflect two deformation phases during the Variscan Orogeny (Mississippian and Early Permian). Moreover the dates may be correlated with Late Variscan magmatic activity in the Holy Cross Mountains and adjacent areas. The deformation of the Daleszyce Fault Zone may be regarded as resulting from displacements of lithospheric blocks within the Trans European Suture Zone during the Late Variscan reconstruction of the Baltica palaeocontinent margin.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorPacek, Adrian
dc.contributor.authorPelc, Andrzej
dc.contributor.authorWójcik, Emil
dc.date.accessioned2024-01-25T05:00:09Z
dc.date.available2024-01-25T05:00:09Z
dc.date.issued2021
dc.description.financePublikacja bezkosztowa
dc.description.number1
dc.description.volume65
dc.identifier.doi10.7306/GQ.1586
dc.identifier.issn1641-7291
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/110915
dc.identifier.weblinkhttps://gq.pgi.gov.pl/article/view/27738
dc.languageeng
dc.relation.ispartofGeological Quarterly
dc.relation.pages1-19
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enbiotite deformation dating
dc.subject.enLudlow
dc.subject.enDaleszyce Fault Zone (DFZ)
dc.subject.enHoly Cross Fold Belt (HCFB)
dc.titleLate Variscan deformation events in the Bardo Syncline revealed by biotite K-Ar dating of Ludlow-age tuffite (Holy Cross Mountains, Poland)
dc.typeJournalArticle
dspace.entity.typePublication