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Spatially varying crustal stress along the Zagros seismic belt inferred from earthquake focal mechanisms
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SYSNO ASEP 0567607 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Spatially varying crustal stress along the Zagros seismic belt inferred from earthquake focal mechanisms Tvůrce(i) Nouri, A. (IR)
Rahimi, B. (IR)
Vavryčuk, Václav (GLU-S)
Ghaemi, F. (IR)Číslo článku 229653 Zdroj.dok. Tectonophysics. - : Elsevier - ISSN 0040-1951
Roč. 846, January (2023)Poč.str. 9 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Zagros ; Tectonic stress ; Stress inversion ; Earthquake ; Focal mechanism Obor OECD Environmental and geological engineering, geotechnics Způsob publikování Omezený přístup Institucionální podpora GLU-S - RVO:67985831 UT WOS 000909810100001 EID SCOPUS 85144443252 DOI 10.1016/j.tecto.2022.229653 Anotace 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. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2024 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0040195122004474
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