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DOI	10.1016/j.tecto.2021.228931
	Stress field and tectonic regime of Central Iran from inversion of the earthquake focal mechanisms
	Sheikholeslami M.R.; Mobayen P.; Javadi H.R.; Ghassemi M.R.
发表日期	2021
ISSN	00401951
卷号	813
英文摘要	This paper provides a latest compilation of data on the present-day stress pattern in Central Iran and its tectonic regime. We compiled 103 focal mechanism data collected from the Global Centroid Moment Tensor Project (GCMT) including data from Harvard University (HRVD) and the International Seismological Center (ISC). Stress inversion of all shallow focal depths provides a first order stress field with a N029°E maximum horizontal compressive stress (SHmax) direction corresponding to a general compressive tectonic regime. In order to reconstruct the second and third order stress fields, we subdivided the study area into eight zones on the basis of their structures, relatively similar focal mechanisms and relatively homogeneous deformation. For each zone and for the same data set, reduced stress tensors have been obtained by formal stress inversion using the Win-Tensor program and modified SLICK method. Both inversion methods show similar results for horizontal stress axes orientations and for the tectonic regimes. The obtained NE-SW direction of the first order stress field is related to Arabia-Eurasia convergence as confirmed by the geodetic measurements. This stress field is responsible for accommodation of shortening within Central Iran and right-lateral movement along the N-S faults as well as left-lateral movement along the E-W faults. Solid block rotation between strike-slip and thrust faults, vertical rotation of the fault bounded blocks, escape tectonics, block extrusion and strain partitioning occurred due to second and third order stress fields with variable SHmax directions from N006° to N081° and in different tectonic regimes. © 2021 Elsevier B.V.
关键词	Central Iran Earthquake Focal mechanism Stress field Stress inversion
英文关键词	Strike-slip faults; Tensors; Centroid moment tensors; Earthquake focal mechanisms; Geodetic measurements; Harvard University; Homogeneous deformation; Left-lateral movements; Reduced stress tensors; Strain partitioning; Compressive stress; earthquake; focal mechanism; strain partitioning; stress field; strike-slip fault; tectonics; thrust fault; Iran
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208068
作者单位	Research Institute for Earth Sciences, Geological Survey of Iran, Tehran, Iran; International Institute of Earthquake Engineering and Seismology, Tehran, Iran; Geological Survey of Iran, Azadi Square, Meraj Avenue, Tehran, 13185-1494, Iran
推荐引用方式 GB/T 7714	Sheikholeslami M.R.,Mobayen P.,Javadi H.R.,et al. Stress field and tectonic regime of Central Iran from inversion of the earthquake focal mechanisms[J],2021,813.
APA	Sheikholeslami M.R.,Mobayen P.,Javadi H.R.,&Ghassemi M.R..(2021).Stress field and tectonic regime of Central Iran from inversion of the earthquake focal mechanisms.Tectonophysics,813.
MLA	Sheikholeslami M.R.,et al."Stress field and tectonic regime of Central Iran from inversion of the earthquake focal mechanisms".Tectonophysics 813(2021).