Spatially varying crustal stress along the Zagros seismic belt inferred from earthquake focal mechanisms

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F23%3A00567607" target="_blank" >RIV/67985831:_____/23:00567607 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985530:_____/23:00567878

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0040195122004474" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0040195122004474</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tecto.2022.229653" target="_blank" >10.1016/j.tecto.2022.229653</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spatially varying crustal stress along the Zagros seismic belt inferred from earthquake focal mechanisms

Popis výsledku v původním jazyce

We determine the stress field of the Zagros fold-and-thrust belt (ZFTB) in the collisional zone between the Arabian and Iranian plates. Using 898 mainshock focal mechanisms, which occurred along the belt between 1956 and 2021, we calculate stress at 32 locations. The results reveal that the crustal stress in the Zagros belt is heterogeneous with variations in the orientation of SHmax as well as in the stress ratio. The interpolation of the Simpson’s index Aϕ points to three distinct domains: northern, central and southern, which are characterized by wrench, compressional, and wrench-compressional to compressional tectonic regimes, respectively. Tectonic stress in the study area is characterized by a horizontal to sub-horizontal maximum compression axis in the ~NESW to ~NNW-SSE direction. The GPS measurements of the strain tensor and the SHmax direction inferred from the stress inversion indicate that both the deformation pattern and the seismicity along the ZFTB zone are primarily affected by convergence of the Arabian and Iranian plates.

Název v anglickém jazyce

Spatially varying crustal stress along the Zagros seismic belt inferred from earthquake focal mechanisms

Popis výsledku anglicky

We determine the stress field of the Zagros fold-and-thrust belt (ZFTB) in the collisional zone between the Arabian and Iranian plates. Using 898 mainshock focal mechanisms, which occurred along the belt between 1956 and 2021, we calculate stress at 32 locations. The results reveal that the crustal stress in the Zagros belt is heterogeneous with variations in the orientation of SHmax as well as in the stress ratio. The interpolation of the Simpson’s index Aϕ points to three distinct domains: northern, central and southern, which are characterized by wrench, compressional, and wrench-compressional to compressional tectonic regimes, respectively. Tectonic stress in the study area is characterized by a horizontal to sub-horizontal maximum compression axis in the ~NESW to ~NNW-SSE direction. The GPS measurements of the strain tensor and the SHmax direction inferred from the stress inversion indicate that both the deformation pattern and the seismicity along the ZFTB zone are primarily affected by convergence of the Arabian and Iranian plates.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20701 - Environmental and geological engineering, geotechnics

Projekt

<a href="/cs/project/GA22-10747S" target="_blank" >GA22-10747S: Výpočet napětí a jeho časoprostorového rozložení z ohniskových mechanismů a seismických momentových tenzorů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Tectonophysics

ISSN

0040-1951

e-ISSN

1879-3266

Svazek periodika

846

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

229653

Kód UT WoS článku

000909810100001

EID výsledku v databázi Scopus

2-s2.0-85144443252