Genesis of the gneissic core complexes in the Arabian-Nubian Shield and its tectonic implications: A regional overview

El‐Wahed, Mohamed Abd; Attia, Mohamed

doi:10.1016/j.jseaes.2022.105337

Cited by 8 publications

(12 citation statements)

References 203 publications

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“…(8) In the infracrustal orogenic model, the ophiolites and island-arc metavolcanics were thrusted over the high-grade gneisses and migmatites that occur as a number of domal-like structures and tectonic windows in the ANS (Abd El-Wahed & Attia, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…NFS is regarded as one of the longest Neoproterozoic shear zone systems on Earth. NFS is evolved between 540 and 620 Ma and consists of a composite group of NW-SE striking sinistral strike-slip faults and ductile shear zones in the Arabian-Nubian shield Abd El-Wahed & Attia, 2022;, 2021a, 2021bAgar, 1987;Berhe, 1990;Davies, 1984;Fritz et al, 2013; F I G U R E 1 5 (a) Sketch map of terranes for the Arabian Shield (modified after Johnson & Woldehaimanot, 2003;Stoesser & Camp, 1984), (b) Sketch of the geological map of the easternmost Arabian Shield (modified after Calvez et al, 1985;Johnson & Stewart, 1995) showing the different rock units of the northern part of Al-Amar suture and Ar Rayn Terrane.…”

Section: Najd Fault Systemmentioning

confidence: 99%

“…In the Egyptian Nubian Shield (Figure 17), three ANS‐scale deformation events (D1–D3) were described by Abd El‐Wahed and Hamimi (2020). The post‐accretionary D2 deformation event produced transpressional structure such as NW‐SE striking sinistral strike‐slip shear zones (e.g., Nugrus, Hafafit, Atalla, Kab Ahmed), NE–SW striking dextral transcurrent mega shears (e.g., Idfu‐Mersa Alam and Qena Safaga Shear Zones), and post‐accretionary shear zone bordering the gneiss domes (e.g., Meatiq, Sibai, Shalul, and Hafafit gneiss domes) (Abd El‐Wahed, 2008, 2014; Abd El‐Wahed & Abu Anbar, 2009; Abd El‐Wahed et al, 2010, 2016, 2021; Abd El‐Wahed & Attia, 2022; Abd El‐Wahed & Hamimi, 2020, 2021a, 2021b; Abdeen et al, 2014; Fritz et al, 1996, 2002, 2013; Hamimi et al, 2019; Kassem et al, 2022; Loizenbauer et al, 2001; Makroum, 2017).…”

Section: Deformational Belts Associated With Suturesmentioning

confidence: 99%

“…NFS is regarded as one of the longest Neoproterozoic shear zone systems on Earth. NFS is evolved between 540 and 620 Ma and consists of a composite group of NW–SE striking sinistral strike‐slip faults and ductile shear zones in the Arabian‐Nubian shield (Abd El‐Wahed et al, 2010, 2016, 2021; Abd El‐Wahed & Attia, 2022; Abd El‐Wahed & Hamimi, 2020, 2021a, 2021b; Agar, 1987; Berhe, 1990; Davies, 1984; Fritz et al, 2013; Hamimi & Abd El‐Wahed, 2020; Hamimi & Fowler, 2021; Johnson et al, 2011; Kassem et al, 2022; Moore, 1979; Stern, 1985; Sultan et al, 1988). The NFS is up to 400 km broad and 1100 km long, with inferred subsurface expansions of the Najd giving it a total length of 2000 km (Moore, 1979).…”

Section: Deformational Belts Associated With Suturesmentioning

confidence: 99%

“…The EAO is subdivided into the ANS in the north and the MB in the south. ANS is composed mainly of juvenile Neoproterozoic crust whereas MB comprises a pre‐Neoproterozoic tectonically overprinted between the Neoproterozoic and early Cambrian (Abd El‐Wahed & Attia, 2022; Bingen et al, 2009; Collins, 2006; De Waele et al, 2006; Fritz et al, 2013; Johnson et al, 2011; Kassem et al, 2022; Stern, 1994, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Structural and tectonic evolution of suture‐related belts and post‐accretionary systems in the Arabian‐Nubian Shield

El‐Wahed

Attia

2023

Geological Journal

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Deforming belts in the Arabian‐Nubian Shield (ANS) are classified into (1) suture‐related belts, including arc–arc and arc‐continental, and (2) post‐accretionary systems, including N‐trending compression zones and NW‐trending strike‐slip faults. Terrane accretion took place in the ANS between 800 and 700 Ma, along arc–arc sutures. Such sutures are directed from E to NE in the northern part of the ANS, and from N to NE in the south, and are aligned in the north and east with N‐ or S‐verging ophiolitic nappes, or in the south with W‐verging nappes. The Asir, Hijaz, and Midyan terranes formed the Western Arabian shield by 715 Ma. The Afif terrane collided with the Hijaz and Asir terranes between 680 and 640 Ma, terminating the subduction along the Nabitah suture. Subduction began west of the Al Amar arc near the margin of the Ar Rayn terrane at 670 Ma. Afif and Ar Rayn terranes collided along the Al Amar‐Idsas suture about 640 Ma, producing the Idsas orogeny that initiated the major faulting and folding. Strike‐slip faults and upright folds related to oblique convergence between terranes and/or post‐accretionary systems deform the southern sutures. The eastern and western boundaries of the ANS are marked by arc‐continental sutures and characterized by N‐trending deformation belts that formed at 750–650 Ma when the ANS collided with East and West Gondwana.

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Section: Discussionmentioning

confidence: 99%

Section: Najd Fault Systemmentioning

confidence: 99%

Section: Deformational Belts Associated With Suturesmentioning

confidence: 99%

Section: Deformational Belts Associated With Suturesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural and tectonic evolution of suture‐related belts and post‐accretionary systems in the Arabian‐Nubian Shield

El‐Wahed

Attia

2023

Geological Journal

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The Arabian-Nubian Shield in Northeast Africa

Hamimi,

Fowler,

Sami

et al. 2024

Regional Geology Reviews

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The structures control the evolution of molasse basins and alteration zones occurrences in the northwestern sector of the Central Eastern Desert of Egypt

Abd El-Wahed,

Kassem,

Abudeif

et al. 2024

Discov Geosci

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Integration between the analyses of both fieldwork and remote sensing dataset were employed to assess the structural evolution of molasse basins and explore gold mineral deposits in the El Qash area, Central Eastern Desert of Egypt. Sandstone, mudstones, wacke, and pebbly conglomerates make up most of the sediments in the molasse basins. The younger basins (595–575 Ma) are small, less weathered, and mostly Dokhan detritus-filled basins compared to the larger older basins (> 625–605 Ma), which have more weathered sources mainly of arc metavolcanics. The molasse basins appear to have originated in a north–south regional extensional setting, characterized by a prolonged period of left-lateral transtension combined with the formation of NNE-trending synformal folds during an ENE–WSW compression phase. Notably, en-echelon arrays of normal faults, oriented perpendicular to the boundary of the strike-slip shear zone, are a recurring feature in basins formed through transtension. Furthermore, oblique NE-SW compression played a role in generating SW-dipping thrust faults and regional folding with NW–SE orientation, along with the reactivation of transtensional normal faults in a reverse manner. Multispectral satellite imagery data and radar data are used to map the relevant lithological units, structures, and hydrothermal alteration zones. This study concludes that the regions where gold deposits may be explored in connection with prospecting alteration minerals include the area around the ophiolitic assemblages, and the granitic intrusions, in addition to the felsite and the molasse sediments contacts.

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Genesis of the gneissic core complexes in the Arabian-Nubian Shield and its tectonic implications: A regional overview

Cited by 8 publications

References 203 publications

Structural and tectonic evolution of suture‐related belts and post‐accretionary systems in the Arabian‐Nubian Shield

Structural and tectonic evolution of suture‐related belts and post‐accretionary systems in the Arabian‐Nubian Shield

The Arabian-Nubian Shield in Northeast Africa

The structures control the evolution of molasse basins and alteration zones occurrences in the northwestern sector of the Central Eastern Desert of Egypt

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