At the border of peri-Gondwana and Baltica: the structure of the eastern termination of the Variscan belt

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F25%3A10169567" target="_blank" >RIV/00025798:_____/25:10169567 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1144/jgs2024-075" target="_blank" >https://doi.org/10.1144/jgs2024-075</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1144/jgs2024-075" target="_blank" >10.1144/jgs2024-075</a>

Jazyk výsledku

angličtina

Název v původním jazyce

At the border of peri-Gondwana and Baltica: the structure of the eastern termination of the Variscan belt

Popis výsledku v původním jazyce

The termination of the eastern Variscan belt has long been a matter of debate because it is deeply concealed beneath younger sediments. Its geometry has been addressed by the two competing hypotheses of the Variscan orocline and right-lateral strike-slip tectonics. We compiled a set of new gravity and magnetic maps for the Czech Republic, Poland and eastern Germany to track Variscan structures in the subsurface. These maps clearly show that the Rheno-Hercynian Suture turns by almost 90 degrees east of the Harz Mountains in Germany and continues into Poland towards the ESE. Our results therefore favour the concept of a semi-orocline that terminates in the east against the Brunovistulian Block. The pattern of magnetic and gravity anomalies, combined with geological evidence, indicates two superimposed stages of accretion in the eastern Variscan belt. The initial west-east convergence led to the formation of the NNE-SSW-trending structures that dominate the southern Bohemian Massif. These structures were overprinted by an important north-south-shortening event that shaped the WNW-ESE-oriented features. The latter run parallel to the Baltica margin and dominate the area NE of the Elbe Fault. This is consistent with seismic data showing large-scale underthrusting of the Baltica crust beneath the Variscan belt over a distance of at least 100 km.

Název v anglickém jazyce

At the border of peri-Gondwana and Baltica: the structure of the eastern termination of the Variscan belt

Popis výsledku anglicky

The termination of the eastern Variscan belt has long been a matter of debate because it is deeply concealed beneath younger sediments. Its geometry has been addressed by the two competing hypotheses of the Variscan orocline and right-lateral strike-slip tectonics. We compiled a set of new gravity and magnetic maps for the Czech Republic, Poland and eastern Germany to track Variscan structures in the subsurface. These maps clearly show that the Rheno-Hercynian Suture turns by almost 90 degrees east of the Harz Mountains in Germany and continues into Poland towards the ESE. Our results therefore favour the concept of a semi-orocline that terminates in the east against the Brunovistulian Block. The pattern of magnetic and gravity anomalies, combined with geological evidence, indicates two superimposed stages of accretion in the eastern Variscan belt. The initial west-east convergence led to the formation of the NNE-SSW-trending structures that dominate the southern Bohemian Massif. These structures were overprinted by an important north-south-shortening event that shaped the WNW-ESE-oriented features. The latter run parallel to the Baltica margin and dominate the area NE of the Elbe Fault. This is consistent with seismic data showing large-scale underthrusting of the Baltica crust beneath the Variscan belt over a distance of at least 100 km.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA23-08249S" target="_blank" >GA23-08249S: Původ relaminantu v Českém masivu během variské orogeneze</a><br>

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

Journal of the Geological Society

ISSN

0016-7649

e-ISSN

2041-479X

Svazek periodika

182

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

nestránkováno

Kód UT WoS článku

001386107700002

EID výsledku v databázi Scopus

2-s2.0-85209998218