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Meso–Cenozoic cooling and exhumation history of the Orlica‐Śnieżnik Dome (Sudetes, NE Bohemian Massif, Central Europe): Insights from apatite fission‐track thermochronometry
Author(s) -
Sobczyk Artur,
Sobel Edward R.,
Georgieva Viktoria
Publication year - 2020
Publication title -
terra nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.353
H-Index - 89
eISSN - 1365-3121
pISSN - 0954-4879
DOI - 10.1111/ter.12449
Subject(s) - geology , fission track dating , cretaceous , massif , paleontology , thermochronology , graben , mesozoic , dome (geology) , sedimentary rock , metamorphic core complex , structural basin , geomorphology , extensional definition , tectonics
This study presents the first suite of apatite fission‐track (AFT) ages from the SE part of the Western Sudetes. AFT cooling ages from the Orlica‐Śnieżnik Dome and the Upper Nysa Kłodzka Graben range from Late Cretaceous (84 Ma) to Early Palaeocene–Middle Eocene (64–45 Ma). The first stage of basin evolution (~100–90 Ma) was marked by the formation of a local extensional depocentre and disruption of the Mesozoic planation surface. Subsequent far‐field convergence of European microplates resulted in Coniacian–Santonian (~89–83 Ma) thrust faulting. AFT data from both metamorphic basement and Mesozoic sedimentary cover indicate homogenous Late Cretaceous burial of the entire Western Sudetes. Thermal history modeling suggests that the onset of cooling could be constrained between 89 and 63 Ma with a climax during the Palaeocene–Middle Eocene basin inversion phase.