3D active fault kinematic behaviour reveals rapidly alternating
near-surface stress states in the Eastern Alps

J 2024

3D active fault kinematic behaviour reveals rapidly alternating near-surface stress states in the Eastern Alps

BAROŇ, Ivo, Rostislav MELICHAR, Ľuboš SOKOL, Matt ROWBERRY, Lukas PLAN et. al.

Základní údaje

Originální název

3D active fault kinematic behaviour reveals rapidly alternating near-surface stress states in the Eastern Alps

Autoři

BAROŇ, Ivo, Rostislav MELICHAR, Ľuboš SOKOL, Matt ROWBERRY, Lukas PLAN a Josef STEMBERK

Vydání

Geological Society Special Publications, Geological Society of London, 2024, 0305-8719

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10508 Physical geography

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1144/SP546-2023-3

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 19. 3. 2024 11:10, Mgr. Marie Šípková, DiS.

Anotace

V originále

Stress variations in the Earth's crust need to be understood in both the spatial and temporal domains to address a number of pressing societal issues. In this paper, precise three-dimensional records of fault kinematic behaviour obtained by mechanical extensometers are used to investigate changes in stress states along major faults in the Eastern Alps. The monitored faults are fractures with evident Upper Quaternary displacement and are directly attributed to their master tectonic structures. The results demonstrate that activity at the submillimetric scale is highly episodic; periods of repose are punctuated by conspicuous reactivation events affecting one or more of the displacement components. An original approach named the SMB2018 method is used to define the stress state associated with each fault reactivation event. The outputs evidence significant short-term changes in the local stress regime. The directions of the principal normal stresses calculated from these reactivation events present generally similar patterns for both compressional and extensional stress states. Consequently, submillimetric fault activity cannot be controlled by a rotating stress field; such shifts can only be caused by a change in the magnitude of the individual principal normal stresses so that the maximum compression changes to the minimum and vice versa.

Návaznosti

GC22-24206J, projekt VaV

Název: Koseismické sesuvy v pohořích aktivních a stabilizovaných akrečních klínů

Investor: Grantová agentura ČR, Koseismické sesuvy v pohořích aktivních a stabilizovaných akrečních klínů, Taiwan/MOST

Citovat

BAROŇ, Ivo, Rostislav MELICHAR, Ľuboš SOKOL, Matt ROWBERRY, Lukas PLAN a Josef STEMBERK. 3D active fault kinematic behaviour reveals rapidly alternating near-surface stress states in the Eastern Alps. Geological Society Special Publications. Geological Society of London, 2024, roč. 546, č. 1, s. 1-15. ISSN 0305-8719. Dostupné z: https://dx.doi.org/10.1144/SP546-2023-3.

@article{2385817,
   author = {Baroň, Ivo and Melichar, Rostislav and Sokol, Ľuboš and Rowberry, Matt and Plan, Lukas and Stemberk, Josef},
   article_number = {1},
   doi = {http://dx.doi.org/10.1144/SP546-2023-3},
   language = {eng},
   issn = {0305-8719},
   journal = {Geological Society Special Publications},
   title = {3D active fault kinematic behaviour reveals rapidly alternating near-surface stress states in the Eastern Alps},
   url = {https://www.lyellcollection.org/doi/full/10.1144/SP546-2023-32},
   volume = {546},
   year = {2024}
}

TY  - JOUR
ID  - 2385817
AU  - Baroň, Ivo - Melichar, Rostislav - Sokol, Ľuboš - Rowberry, Matt - Plan, Lukas - Stemberk, Josef
PY  - 2024
TI  - 3D active fault kinematic behaviour reveals rapidly alternating near-surface stress states in the Eastern Alps
JF  - Geological Society Special Publications
VL  - 546
IS  - 1
SP  - 1-15
EP  - 1-15
PB  - Geological Society of London
SN  - 03058719
UR  - https://www.lyellcollection.org/doi/full/10.1144/SP546-2023-32
N2  - Stress variations in the Earth's crust need to be understood in both the spatial and temporal domains to address a number of pressing societal issues. In this paper, precise three-dimensional records of fault kinematic behaviour obtained by mechanical extensometers are used to investigate changes in stress states along major faults in the Eastern Alps. The monitored faults are fractures with evident Upper Quaternary displacement and are directly attributed to their master tectonic structures. The results demonstrate that activity at the submillimetric scale is highly episodic; periods of repose are punctuated by conspicuous reactivation events affecting one or more of the displacement components. An original approach named the SMB2018 method is used to define the stress state associated with each fault reactivation event. The outputs evidence significant short-term changes in the local stress regime. The directions of the principal normal stresses calculated from these reactivation events present generally similar patterns for both compressional and extensional stress states. Consequently, submillimetric fault activity cannot be controlled by a rotating stress field; such shifts can only be caused by a change in the magnitude of the individual principal normal stresses so that the maximum compression changes to the minimum and vice versa.
ER  -

BAROŇ, Ivo, Rostislav MELICHAR, Ľuboš SOKOL, Matt ROWBERRY, Lukas PLAN a Josef STEMBERK. 3D active fault kinematic behaviour reveals rapidly alternating near-surface stress states in the Eastern Alps. \textit{Geological Society Special Publications}. Geological Society of London, 2024, roč.~546, č.~1, s.~1-15. ISSN~0305-8719. Dostupné z: https://dx.doi.org/10.1144/SP546-2023-3.

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