Turkish Journal of Earth Sciences, Volume (30), No (2), Year (2021-3) , Pages (235-246)

Title : ( Active tectonic stress field analysis in NW Iran-SE Turkey using earthquake focal mechanism data )

Authors: Ahad Nouri Mokhoori , Behnam Rahimi , mohsen moayyed ,

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Abstract

NW Iran-SE Turkey is a tectonically active zone related to the Arabia-Eurasia convergence, but the active stress state in this zone has not yet been clearly studied. To improve the knowledge of present-day stress state in this region, optimum reduced stress tensor was analysed. For this, a large number of earthquake focal mechanisms (277) were collected. Te analyses show most mechanisms exhibit strike-slip to thrust faulting. Tese data indicate that this region is dominated by an N158° maximum horizontal compressive stress (SHmax) belonging to a transpressional tectonic regime. In the scale of the study area, the relative magnitude of the intermediate and minimum principal stress axes do not differ much (ϕ = 0.09). Brittle deformation in this area is dominantly accommodated by a combination of strike-slip and thrust faulting (Aϕ = 1.82 to 2.30). Te analyses reveal that two sets of faults show a high tendency to slip and reactivate. Tese sets contain NW-SE-striking right-lateral and NNE-SSW-striking lef-lateral faults. Te results of this study may help to study the active seismicity, tectonic activity, and seismic risk in this region.

Keywords

, Stress inversion, stress regime, focal mechanism solution, active tectonic, NW Iran-SE Turkey
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@article{paperid:1085102,
author = {Nouri Mokhoori, Ahad and Rahimi, Behnam and Mohsen MOAYYED},
title = {Active tectonic stress field analysis in NW Iran-SE Turkey using earthquake focal mechanism data},
journal = {Turkish Journal of Earth Sciences},
year = {2021},
volume = {30},
number = {2},
month = {March},
issn = {1300-0985},
pages = {235--246},
numpages = {11},
keywords = {Stress inversion; stress regime; focal mechanism solution; active tectonic; NW Iran-SE Turkey},
}

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%0 Journal Article
%T Active tectonic stress field analysis in NW Iran-SE Turkey using earthquake focal mechanism data
%A Nouri Mokhoori, Ahad
%A Rahimi, Behnam
%A Mohsen MOAYYED
%J Turkish Journal of Earth Sciences
%@ 1300-0985
%D 2021

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