Post-Variscan thermal history of the Boskovice Basin (Bohemian Massif, Czech Republic) based on thermochronology data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F25%3A73632880" target="_blank" >RIV/61989592:15310/25:73632880 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s00531-025-02496-0" target="_blank" >https://link.springer.com/article/10.1007/s00531-025-02496-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00531-025-02496-0" target="_blank" >10.1007/s00531-025-02496-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Post-Variscan thermal history of the Boskovice Basin (Bohemian Massif, Czech Republic) based on thermochronology data

Popis výsledku v původním jazyce

The thermal history of the Boskovice Basin in the SE Bohemian Massif remains a subject of debate, particularly regarding the extent and timing of thermal resetting in its sedimentary succession. Previous studies have suggested either prolonged burial-related heating or localised tectonothermal events as the dominant mechanism. To address this controversy, we apply apatite fission track (AFT) and zircon (U–Th)/He (ZHe) thermochronology to seven samples from the uppermost Carboniferous–lower Permian coal-bearing siliciclastic succession. The ZHe thermochronometry yielded Permian ages (297.7 ± 8.6 to 262.4 ± 7.9 My), whilst the AFT ages range from 187.3 My ± 14.2 to 120.8 ± 10.2. The AFT ages of all samples are much younger than their stratigraphic ages, indicating that they have been thermally reset. In contrast, the ZHe ages of some samples are only 10–30 My younger than the depositional age, whilst for the remaining samples, they coincide with the stratigraphic age. This means that only in some samples, the zircon grains have been reset, in which case they record a thermal event in the Middle–Late Permian. The unimodal distribution, relatively short mean lengths (13.25–12.30 µm) and low standard deviation values (1.4–1.1 μm) of the track lengths indicate that the Permian heating event was followed by prolonged residence in the AFT partial annealing zone during the Mesozoic and final Late Cretaceous–Cenozoic cooling phase, as shown by numerical thermal models. Thermal modelling using ZHe and AFT data has shown that the coalification of organic matter contained in the uppermost Carboniferous to lower Permian rocks occurred already in the Permian, when the Boskovice Basin sedimentary rocks experienced maximum paleotemperatures. Consequently, our results indicate the importance of Middle–Late Permian tectonics leading to inversion of the Boskovice Basin (273.7–262.4 My; Guadalupian) only 10–30 My after the end of sedimentation.

Název v anglickém jazyce

Post-Variscan thermal history of the Boskovice Basin (Bohemian Massif, Czech Republic) based on thermochronology data

Popis výsledku anglicky

The thermal history of the Boskovice Basin in the SE Bohemian Massif remains a subject of debate, particularly regarding the extent and timing of thermal resetting in its sedimentary succession. Previous studies have suggested either prolonged burial-related heating or localised tectonothermal events as the dominant mechanism. To address this controversy, we apply apatite fission track (AFT) and zircon (U–Th)/He (ZHe) thermochronology to seven samples from the uppermost Carboniferous–lower Permian coal-bearing siliciclastic succession. The ZHe thermochronometry yielded Permian ages (297.7 ± 8.6 to 262.4 ± 7.9 My), whilst the AFT ages range from 187.3 My ± 14.2 to 120.8 ± 10.2. The AFT ages of all samples are much younger than their stratigraphic ages, indicating that they have been thermally reset. In contrast, the ZHe ages of some samples are only 10–30 My younger than the depositional age, whilst for the remaining samples, they coincide with the stratigraphic age. This means that only in some samples, the zircon grains have been reset, in which case they record a thermal event in the Middle–Late Permian. The unimodal distribution, relatively short mean lengths (13.25–12.30 µm) and low standard deviation values (1.4–1.1 μm) of the track lengths indicate that the Permian heating event was followed by prolonged residence in the AFT partial annealing zone during the Mesozoic and final Late Cretaceous–Cenozoic cooling phase, as shown by numerical thermal models. Thermal modelling using ZHe and AFT data has shown that the coalification of organic matter contained in the uppermost Carboniferous to lower Permian rocks occurred already in the Permian, when the Boskovice Basin sedimentary rocks experienced maximum paleotemperatures. Consequently, our results indicate the importance of Middle–Late Permian tectonics leading to inversion of the Boskovice Basin (273.7–262.4 My; Guadalupian) only 10–30 My after the end of sedimentation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Earth Sciences

ISSN

—

e-ISSN

1437-3262

Svazek periodika

114

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

20

Strana od-do

553-572

Kód UT WoS článku

001445584600001

EID výsledku v databázi Scopus

2-s2.0-105000378696