globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2020.228440
论文题名:
Active tectonics and GPS data analysis of the Maghrebian thrust belt and Africa-Eurasia plate convergence in Tunisia
作者: Bahrouni N.; Masson F.; Meghraoui M.; Saleh M.; Maamri R.; Dhaha F.; Arfaoui M.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 785
语种: 英语
中文关键词: 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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170546
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Tectonophysics,2020-01-01,785
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