Geomorphological evidence of tectonic activity of the Marianske Lazne Fault (Czech Republic) and its influence to stream network evolution

0556863 - ÚSMH 2023 RIV CZ eng J - Článek v odborném periodiku
Flašar, Jan - Štěpančíková, Petra
Geomorphological evidence of tectonic activity of the Marianske Lazne Fault (Czech Republic) and its influence to stream network evolution.
Acta geodynamica et geomaterialia. Roč. 19, č. 1 (2022), s. 5-25. ISSN 1214-9705. E-ISSN 2336-4351
Grant CEP: GA ČR(CZ) GA21-29826S; GA MŠMT(CZ) LTV20022
Institucionální podpora: RVO:67985891
Klíčová slova: Neotectonics * Mountain front sinuosity * Basin asymmetry * Stream network * Bohemian Massif
Obor OECD: Geology
Impakt faktor: 0.9, rok: 2022
Způsob publikování: Open access
https://www.irsm.cas.cz/materialy/acta_content/2021_doi/Flasar_AGG_2021_0039.pdf

The Marianske Lazne Fault (western Bohemia, CZE) is a morphologically, geologically and tectonically prominent structure with that is 150 km long with an NNW-SSE orientation. Its tectonic activity, especially in the NW part and in the neighbouring Cheb basin, is well known and has been proven by present-day earthquake swarms, mantle-derived CO2 emanations, geophysical and paleoseismological research. It seems that other parts of the MLF (especially segments of NNW-SSE and N-S orientation) might also have been active during the Pleistocene, possible even in the Holocene. This study provides a robust set of morphometric analyses mountain-front sinuosity, basin asymmetry, longitudinal stream profiles, SL-index, which assesses the possibility of recent tectonic activity. The results suggest that the activity of the central and southern part of the MLF could have been very young. A reconstruction of the evolution of the stream network of the Mze River, as a result of different timing of the activity of particular segments of the MLF, is also put forward. The first ideas about the evolution of terrain morphology and the stream network are proposed by this study, however subsequent field research (geophysics, paleoseismology) could prove and date the tectonic activity. The delineation of segments with young activity may also have a great implication for seismic hazard assessment.
Trvalý link: http://hdl.handle.net/11104/0331940