Tectonic evolution of kid metamorphic complex and the recognition of Najd fault system in South East Sinai, Egypt

2017 ◽  
Vol 106 (8) ◽  
pp. 2817-2836 ◽  
Author(s):  
Yasser M. Sultan ◽  
Mohamed K. El-Shafei ◽  
Mohamed O. Arnous
Keyword(s):  
Tectonic Evolution ◽  
Fault System ◽  
Metamorphic Complex ◽  
Najd Fault System

Genesis of gabbroic intrusions in the Arabian Shield, Saudi Arabia: mineralogical, geochemical and tectonic fingerprints of the Neoproterozoic arc magmatism

2021 ◽  
pp. 1-18
Author(s):  
Shehata Ali ◽  
Abdullah S. Alshammari
Keyword(s):  
Saudi Arabia ◽  
Fault System ◽  
Geochemical Data ◽  
Stability Field ◽  
Arabian Shield ◽  
Red Sea Rift ◽  
Nubian Shield ◽  
Najd Fault System ◽  
Garnet Stability Field ◽  
Arabian Nubian Shield

Abstract The Arabian Shield of Saudi Arabia represents part of the Arabian–Nubian Shield and forms an exposure of juvenile continental crust on the eastern side of the Red Sea rift. Gabbroic intrusions in Saudi Arabia constitute a significant part of the mafic magmatism in the Neoproterozoic Arabian Shield. This study records the first detailed geological, mineralogical and geochemical data for gabbroic intrusions located in the Gabal Samra and Gabal Abd areas of the Hail region in the Arabian Shield of Saudi Arabia. Geological field relations and investigations, supported by mineralogical and geochemical data, indicate that the gabbroic intrusions are generally unmetamorphosed and undeformed, and argue for their post-collisional emplacement. Their mineralogical and geochemical features reveal crystallization from hydrous, mainly tholeiitic, mafic magmas with arc-like signatures, which were probably inherited from the previous subduction event in the Arabian–Nubian Shield. The gabbroic rocks exhibit sub-chondritic Nb/U, Nb/Ta and Zr/Hf ratios, revealing depletion of their mantle source. Moreover, the high ratios of (Gd/Yb)N and (Dy/Yb)N indicate that their parental mafic melts were derived from a garnet-peridotite source with a garnet signature in the mantle residue. This implication suggests that the melting region was at a depth exceeding ∼70–80 km at the garnet stability field. They have geochemical characteristics similar to other post-collisional gabbros of the Arabian–Nubian Shield. Their origin could be explained by adiabatic decompression melting of depleted asthenosphere that interacted during ascent with metasomatized lithospheric mantle in an extensional regime, likely related to the activity of the Najd Fault System, at the end of the Pan-African Orogeny.

Tectonic evolution of a low-angle extensional fault system from restored cross-sections in the Northern Apennines (Italy)

Tectonics ◽  
2011 ◽  
Vol 30 (6) ◽  
pp. n/a-n/a ◽  
Author(s):  
F. Mirabella ◽  
F. Brozzetti ◽  
A. Lupattelli ◽  
M. R. Barchi
Keyword(s):  
Cross Sections ◽  
Tectonic Evolution ◽  
Northern Apennines ◽  
Fault System

Bathymetry and uplift rate of the Gulf of Aqaba, Dead Sea Fault.

2021 ◽  
Author(s):  
Matthieu Ribot ◽  
Yann Klinger ◽  
Edwige Pons-Branchu ◽  
Marthe Lefevre ◽  
Sigurjón Jónsson
Keyword(s):  
High Resolution ◽  
Tectonic Evolution ◽  
Active Faults ◽  
Major Change ◽  
Dead Sea ◽  
Fault System ◽  
Arabian Plate ◽  
Gulf Of Aqaba ◽  
Uplift Rate ◽  
The Dead

<p>Initially described in the late 50’s, the Dead Sea Fault system connects at its southern end to the Red Sea extensive system, through a succession of left-stepping faults. In this region, the left-lateral differential displacement of the Arabian plate with respect to the Sinai micro-plate along the Dead Sea fault results in the formation of a depression corresponding to the Gulf Aqaba. We acquired new bathymetric data in the areas of the Gulf of Aqaba and Strait of Tiran during two marine campaigns (June 2018, September 2019) in order to investigate the location of the active faults, which structure and control the morphology of the area. The high-resolution datasets (10-m posting) allow us to present a new fault map of the gulf and to discuss the seismic potential of the main active faults.</p><p>We also investigated the eastern margin of the Gulf of Aqaba and Tiran island to assess the vertical uplift rate. To do so, we computed high-resolution topographic data and we processed new series of U-Th analyses on corals from the uplifted marine terraces.</p><p>Combining our results with previous studies, we determined the local and the regional uplift in the area of the Gulf of Aqaba and Strait of Tiran.</p><p>Eventually, we discussed the tectonic evolution of the gulf since the last major change of the tectonic regime and we propose a revised tectonic evolution model of the area.</p><p> </p>

A strike-slip core complex from the Najd fault system, Arabian shield

Terra Nova ◽  
2014 ◽  
Vol 26 (5) ◽  
pp. 387-394 ◽  
Author(s):  
Sven Erik Meyer ◽  
Cees Passchier ◽  
Tamer Abu-Alam ◽  
Kurt Stüwe
Keyword(s):  
Strike Slip ◽  
Fault System ◽  
Arabian Shield ◽  
Core Complex ◽  
Najd Fault System

Tectonic evolution of the hinterland of the Zagros Orogen revealed from the deformation of the Golpaygan Metamorphic Complex, Iran

2019 ◽  
Vol 182 ◽  
pp. 103929 ◽  
Author(s):  
Mohammad Reza Sheikholeslami ◽  
Mohammad Reza Ghassemi ◽  
Jamshid Hassanzadeh
Keyword(s):  
Tectonic Evolution ◽  
Metamorphic Complex ◽  
Zagros Orogen

scholarly journals Timing, Kinematics, and Displacement of the Taltal Fault System, Northern Chile: Implications for the Cretaceous Tectonic Evolution of the Andean Margin

Tectonics ◽  
2020 ◽  
Vol 39 (2) ◽  
Author(s):  
S. P. Mavor ◽  
J. S. Singleton ◽  
R. Gomila ◽  
G. Heuser ◽  
N. M. Seymour ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Fault System ◽  
Northern Chile

Structural variety and tectonic evolution of strike-slip basins related to the Philippine Fault System, northern Luzon, Philippines

Tectonics ◽  
1993 ◽  
Vol 12 (1) ◽  
pp. 187-203 ◽  
Author(s):  
Jean Claude Ringenbach ◽  
Nicolas Pinet ◽  
Jean François Stéphan ◽  
Jean Delteil
Keyword(s):  
Tectonic Evolution ◽  
Strike Slip ◽  
Fault System ◽  
Structural Variety
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