气候变化领域集成服务门户(CCPortal): Active tectonics and GPS data analysis of the Maghrebian thrust belt and Africa-Eurasia plate convergence in Tunisia

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DOI	10.1016/j.tecto.2020.228440
	Active tectonics and GPS data analysis of the Maghrebian thrust belt and Africa-Eurasia plate convergence in Tunisia
	Bahrouni N.; Masson F.; Meghraoui M.; Saleh M.; Maamri R.; Dhaha F.; Arfaoui M.
发表日期	2020
ISSN	00401951
卷号	785
英文摘要	The Atlas Mountains of Tunisia belong to the seismically active zone of the Africa (Nubia) - Eurasia plate boundary in the central-western Mediterranean. We study the eastern section of the Maghrebian thrust belt using a subset (6 days) from each of 5 years (2014 to 2018) of permanent (survey-mode) GPS data and active tectonics. WNW to NNW-trending velocities express crustal motion and geodetic strain fields from the Sahara Platform to the Tell Atlas, consistent with African plate convergence. To the south, the velocities and trajectories indicate nearly WNW-ESE-trending right-lateral motion of the Sahara fault-related Atlas fold belt with respect to the Sahara Platform. Farther north and northeast, the significant decrease in velocities between the Eastern Platform (Sahel), Central Atlas and Tell Atlas and the clockwise rotation mark the NNW-trending shortening deformation associated with local ENE-WSW extension visible in the Quaternary grabens. The velocity field and strain distribution associated with the active E-W- to WNW-ESE-trending right-lateral faulting and NE-SW fault-related folds illustrate the transpression tectonics and support the identification of four tectonic domains north of the Africa-Nubia Platform in Tunisia. The transpression reduces northward when reaching the Central and Tell Atlas. These results change our perception of the Africa-Eurasia plate boundary previously located along the western Mediterranean coastline. © 2020 Elsevier B.V.
关键词	Active Tectonics GPS Seismotectonics Tunisia
英文关键词	Geodetic satellites; Global positioning system; Velocity; Active tectonics; Clockwise rotation; Fault-related fold; Geodetic strain; Plate convergence; Seismically active zones; Strain distributions; Western Mediterranean; Faulting; African plate; Eurasian plate; GPS; graben; plate convergence; satellite data; strain analysis; tectonics; thrust; transpression; velocity structure; Atlas Mountains; Tunisia
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/207712
作者单位	National Office of Mines (Geological Survey), Tunis, Tunisia; Institut de Physique du Globe Strasbourg, (CNRS-UMR7516), EOST, Université de Strasbourg, France; National Research Institute of Astronomy and Geophysics, Helwan, Cairo, Egypt
推荐引用方式 GB/T 7714	Bahrouni N.,Masson F.,Meghraoui M.,et al. Active tectonics and GPS data analysis of the Maghrebian thrust belt and Africa-Eurasia plate convergence in Tunisia[J],2020,785.
APA	Bahrouni N..,Masson F..,Meghraoui M..,Saleh M..,Maamri R..,...&Arfaoui M..(2020).Active tectonics and GPS data analysis of the Maghrebian thrust belt and Africa-Eurasia plate convergence in Tunisia.Tectonophysics,785.
MLA	Bahrouni N.,et al."Active tectonics and GPS data analysis of the Maghrebian thrust belt and Africa-Eurasia plate convergence in Tunisia".Tectonophysics 785(2020).